diff options
| -rw-r--r-- | package/uhttpd/Makefile | 55 | ||||
| -rw-r--r-- | package/uhttpd/files/uhttpd.config | 7 | ||||
| -rwxr-xr-x | package/uhttpd/files/uhttpd.init | 1 | ||||
| -rw-r--r-- | package/uhttpd/src/Makefile | 15 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-cgi.c | 792 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-cgi.h | 20 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-file.c | 143 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-file.h | 4 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-lua.c | 608 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-lua.h | 17 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-tls.c | 244 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-tls.h | 8 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-ubus.c | 957 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-ubus.h | 70 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-utils.c | 250 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd-utils.h | 28 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd.c | 582 | ||||
| -rw-r--r-- | package/uhttpd/src/uhttpd.h | 89 |
18 files changed, 2567 insertions, 1323 deletions
diff --git a/package/uhttpd/Makefile b/package/uhttpd/Makefile index 0331470bf..f30d6cabd 100644 --- a/package/uhttpd/Makefile +++ b/package/uhttpd/Makefile @@ -8,14 +8,16 @@ include $(TOPDIR)/rules.mk PKG_NAME:=uhttpd -PKG_RELEASE:=32 +PKG_RELEASE:=33 PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME) PKG_CONFIG_DEPENDS := \ + CONFIG_PACKAGE_uhttpd_debug \ CONFIG_PACKAGE_uhttpd-mod-lua \ CONFIG_PACKAGE_uhttpd-mod-tls \ CONFIG_PACKAGE_uhttpd-mod-tls_cyassl \ - CONFIG_PACKAGE_uhttpd-mod-tls_openssl + CONFIG_PACKAGE_uhttpd-mod-tls_openssl \ + CONFIG_PACKAGE_uhttpd-mod-ubus include $(INCLUDE_DIR)/package.mk @@ -29,7 +31,7 @@ endef define Package/uhttpd $(Package/uhttpd/default) - MENU:=1 + DEPENDS:=+libubox endef define Package/uhttpd/description @@ -38,6 +40,12 @@ define Package/uhttpd/description HTTP daemon. endef +define Package/uhttpd/config + config PACKAGE_uhttpd_debug + bool "Build with debug messages" + default n +endef + define Package/uhttpd-mod-tls $(Package/uhttpd/default) @@ -50,17 +58,17 @@ define Package/uhttpd-mod-tls/description endef define Package/uhttpd-mod-tls/config - choice - depends on PACKAGE_uhttpd-mod-tls - prompt "TLS Provider" - default PACKAGE_uhttpd-mod-tls_cyassl + choice + depends on PACKAGE_uhttpd-mod-tls + prompt "TLS Provider" + default PACKAGE_uhttpd-mod-tls_cyassl - config PACKAGE_uhttpd-mod-tls_cyassl - bool "CyaSSL" + config PACKAGE_uhttpd-mod-tls_cyassl + bool "CyaSSL" - config PACKAGE_uhttpd-mod-tls_openssl - bool "OpenSSL" - endchoice + config PACKAGE_uhttpd-mod-tls_openssl + bool "OpenSSL" + endchoice endef UHTTPD_TLS:= @@ -91,12 +99,25 @@ define Package/uhttpd-mod-lua/description endef -TARGET_CFLAGS += $(TLS_CFLAGS) -TARGET_LDFLAGS += -Wl,-rpath-link=$(STAGING_DIR)/usr/lib +define Package/uhttpd-mod-ubus + $(Package/uhttpd/default) + TITLE+= (ubus plugin) + DEPENDS:=uhttpd +libubus +libblobmsg-json +endef + +define Package/uhttpd-mod-ubus/description + The ubus plugin adds a HTTP/JSON RPC proxy for ubus and publishes the + session.* namespace and procedures. +endef + + +TARGET_CFLAGS += $(TLS_CFLAGS) $(if $(CONFIG_PACKAGE_uhttpd_debug),-DDEBUG) -ggdb3 +TARGET_LDFLAGS += -lubox -Wl,-rpath-link=$(STAGING_DIR)/usr/lib MAKE_VARS += \ FPIC="$(FPIC)" \ LUA_SUPPORT="$(if $(CONFIG_PACKAGE_uhttpd-mod-lua),1)" \ TLS_SUPPORT="$(if $(CONFIG_PACKAGE_uhttpd-mod-tls),1)" \ + UBUS_SUPPORT="$(if $(CONFIG_PACKAGE_uhttpd-mod-ubus),1)" \ UHTTPD_TLS="$(UHTTPD_TLS)" \ TLS_CFLAGS="$(TLS_CFLAGS)" \ TLS_LDFLAGS="$(TLS_LDFLAGS)" @@ -131,7 +152,13 @@ define Package/uhttpd-mod-lua/install $(INSTALL_BIN) $(PKG_BUILD_DIR)/uhttpd_lua.so $(1)/usr/lib/ endef +define Package/uhttpd-mod-ubus/install + $(INSTALL_DIR) $(1)/usr/lib + $(INSTALL_BIN) $(PKG_BUILD_DIR)/uhttpd_ubus.so $(1)/usr/lib/ +endef + $(eval $(call BuildPackage,uhttpd)) $(eval $(call BuildPackage,uhttpd-mod-tls)) $(eval $(call BuildPackage,uhttpd-mod-lua)) +$(eval $(call BuildPackage,uhttpd-mod-ubus)) diff --git a/package/uhttpd/files/uhttpd.config b/package/uhttpd/files/uhttpd.config index 08ca5e5e0..b33411e97 100644 --- a/package/uhttpd/files/uhttpd.config +++ b/package/uhttpd/files/uhttpd.config @@ -17,6 +17,12 @@ config uhttpd main # This is a DNS rebinding countermeasure. option rfc1918_filter 1 + # Maximum number of concurrent requests. + # If this number is exceeded, further requests are + # queued until the number of running requests drops + # below the limit again. + option max_requests 3 + # Certificate and private key for HTTPS. # If no listen_https addresses are given, # the key options are ignored. @@ -81,4 +87,3 @@ config cert px5g # Common name option commonname OpenWrt - diff --git a/package/uhttpd/files/uhttpd.init b/package/uhttpd/files/uhttpd.init index d4037a1b9..379a9f5b5 100755 --- a/package/uhttpd/files/uhttpd.init +++ b/package/uhttpd/files/uhttpd.init @@ -72,6 +72,7 @@ start_instance() append_arg "$cfg" tcp_keepalive "-A" append_arg "$cfg" error_page "-E" append_arg "$cfg" index_page "-I" + append_arg "$cfg" max_requests "-n" 3 append_bool "$cfg" no_symlinks "-S" 0 append_bool "$cfg" no_dirlists "-D" 0 diff --git a/package/uhttpd/src/Makefile b/package/uhttpd/src/Makefile index 2b08ec668..98226ed20 100644 --- a/package/uhttpd/src/Makefile +++ b/package/uhttpd/src/Makefile @@ -41,6 +41,10 @@ ifeq ($(LUA_SUPPORT),1) CFLAGS += -DHAVE_LUA endif +ifeq ($(UBUS_SUPPORT),1) + CFLAGS += -DHAVE_UBUS +endif + world: compile @@ -66,10 +70,19 @@ ifeq ($(TLS_SUPPORT),1) -o $(TLSLIB) uhttpd-tls.c endif +ifeq ($(UBUS_SUPPORT),1) + UBUSLIB := uhttpd_ubus.so + + $(UBUSLIB): uhttpd-ubus.c + $(CC) $(CFLAGS) $(LDFLAGS) $(FPIC) \ + -shared -lubus -ljson -lblobmsg_json \ + -o $(UBUSLIB) uhttpd-ubus.c +endif + %.o: %.c $(CC) $(CFLAGS) -c -o $@ $< -compile: $(OBJ) $(TLSLIB) $(LUALIB) +compile: $(OBJ) $(TLSLIB) $(LUALIB) $(UBUSLIB) $(CC) -o uhttpd $(LDFLAGS) $(OBJ) $(LIB) clean: diff --git a/package/uhttpd/src/uhttpd-cgi.c b/package/uhttpd/src/uhttpd-cgi.c index f85212569..2f7ea7afa 100644 --- a/package/uhttpd/src/uhttpd-cgi.c +++ b/package/uhttpd/src/uhttpd-cgi.c @@ -1,7 +1,7 @@ /* * uhttpd - Tiny single-threaded httpd - CGI handler * - * Copyright (C) 2010-2011 Jo-Philipp Wich <xm@subsignal.org> + * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -20,25 +20,24 @@ #include "uhttpd-utils.h" #include "uhttpd-cgi.h" -static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off) + +static bool +uh_cgi_header_parse(struct http_response *res, char *buf, int len, int *off) { char *bufptr = NULL; char *hdrname = NULL; int hdrcount = 0; int pos = 0; - static struct http_response res; - - if (((bufptr = strfind(buf, len, "\r\n\r\n", 4)) != NULL) || ((bufptr = strfind(buf, len, "\n\n", 2)) != NULL)) { *off = (int)(bufptr - buf) + ((bufptr[0] == '\r') ? 4 : 2); - memset(&res, 0, sizeof(res)); + memset(res, 0, sizeof(*res)); - res.statuscode = 200; - res.statusmsg = "OK"; + res->statuscode = 200; + res->statusmsg = "OK"; bufptr = &buf[0]; @@ -70,25 +69,30 @@ static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off) if (pos <= len) { - if ((hdrcount + 1) < array_size(res.headers)) + if ((hdrcount+1) < array_size(res->headers)) { if (!strcasecmp(hdrname, "Status")) { - res.statuscode = atoi(bufptr); + res->statuscode = atoi(bufptr); - if (res.statuscode < 100) - res.statuscode = 200; + if (res->statuscode < 100) + res->statuscode = 200; if (((bufptr = strchr(bufptr, ' ')) != NULL) && (&bufptr[1] != 0)) { - res.statusmsg = &bufptr[1]; + res->statusmsg = &bufptr[1]; } + + D("CGI: HTTP/1.x %03d %s\n", + res->statuscode, res->statusmsg); } else { - res.headers[hdrcount++] = hdrname; - res.headers[hdrcount++] = bufptr; + D("CGI: HTTP: %s: %s\n", hdrname, bufptr); + + res->headers[hdrcount++] = hdrname; + res->headers[hdrcount++] = bufptr; } bufptr = &buf[pos]; @@ -96,16 +100,16 @@ static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off) } else { - return NULL; + return false; } } } } - return &res; + return true; } - return NULL; + return false; } static char * uh_cgi_header_lookup(struct http_response *res, @@ -122,485 +126,443 @@ static char * uh_cgi_header_lookup(struct http_response *res, return NULL; } -static int uh_cgi_error_500(struct client *cl, struct http_request *req, - const char *message) +static void uh_cgi_shutdown(struct uh_cgi_state *state) { - if (uh_http_sendf(cl, NULL, - "HTTP/%.1f 500 Internal Server Error\r\n" - "Content-Type: text/plain\r\n%s\r\n", - req->version, - (req->version > 1.0) - ? "Transfer-Encoding: chunked\r\n" : "") >= 0) - { - return uh_http_send(cl, req, message, -1); - } - - return -1; + close(state->rfd); + close(state->wfd); + free(state); } - -void uh_cgi_request(struct client *cl, struct http_request *req, - struct path_info *pi, struct interpreter *ip) +static bool uh_cgi_socket_cb(struct client *cl) { - int i, hdroff, bufoff, rv; - int hdrlen = 0; - int buflen = 0; - int fd_max = 0; - int content_length = 0; - int header_sent = 0; + int i, len, hdroff; + char buf[UH_LIMIT_MSGHEAD]; - int rfd[2] = { 0, 0 }; - int wfd[2] = { 0, 0 }; + struct uh_cgi_state *state = (struct uh_cgi_state *)cl->priv; + struct http_response *res = &state->cl->response; + struct http_request *req = &state->cl->request; - char buf[UH_LIMIT_MSGHEAD]; - char hdr[UH_LIMIT_MSGHEAD]; + /* there is unread post data waiting */ + while (state->content_length > 0) + { + /* remaining data in http head buffer ... */ + if (state->cl->httpbuf.len > 0) + { + len = min(state->content_length, state->cl->httpbuf.len); - pid_t child; + D("CGI: Child(%d) feed %d HTTP buffer bytes\n", + state->cl->proc.pid, len); - fd_set reader; - fd_set writer; + memcpy(buf, state->cl->httpbuf.ptr, len); - sigset_t ss; + state->cl->httpbuf.len -= len; + state->cl->httpbuf.ptr +=len; + } - struct sigaction sa; - struct timeval timeout; - struct http_response *res; + /* read it from socket ... */ + else + { + len = uh_tcp_recv(state->cl, buf, + min(state->content_length, sizeof(buf))); + if ((len < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK))) + break; - /* spawn pipes for me->child, child->me */ - if ((pipe(rfd) < 0) || (pipe(wfd) < 0)) - { - uh_http_sendhf(cl, 500, "Internal Server Error", - "Failed to create pipe: %s", strerror(errno)); + D("CGI: Child(%d) feed %d/%d TCP socket bytes\n", + state->cl->proc.pid, len, + min(state->content_length, sizeof(buf))); + } - if (rfd[0] > 0) close(rfd[0]); - if (rfd[1] > 0) close(rfd[1]); - if (wfd[0] > 0) close(wfd[0]); - if (wfd[1] > 0) close(wfd[1]); + if (len) + state->content_length -= len; + else + state->content_length = 0; - return; + /* ... write to CGI process */ + len = uh_raw_send(state->wfd, buf, len, + cl->server->conf->script_timeout); } - /* fork off child process */ - switch ((child = fork())) + /* try to read data from child */ + while ((len = uh_raw_recv(state->rfd, buf, sizeof(buf), -1)) > 0) { - /* oops */ - case -1: - uh_http_sendhf(cl, 500, "Internal Server Error", - "Failed to fork child: %s", strerror(errno)); - return; - - /* exec child */ - case 0: - /* unblock signals */ - sigemptyset(&ss); - sigprocmask(SIG_SETMASK, &ss, NULL); - - /* restore SIGTERM */ - sa.sa_flags = 0; - sa.sa_handler = SIG_DFL; - sigemptyset(&sa.sa_mask); - sigaction(SIGTERM, &sa, NULL); - - /* close loose pipe ends */ - close(rfd[0]); - close(wfd[1]); - - /* patch stdout and stdin to pipes */ - dup2(rfd[1], 1); - dup2(wfd[0], 0); - - /* avoid leaking our pipe into child-child processes */ - fd_cloexec(rfd[1]); - fd_cloexec(wfd[0]); - - /* check for regular, world-executable file _or_ interpreter */ - if (((pi->stat.st_mode & S_IFREG) && - (pi->stat.st_mode & S_IXOTH)) || (ip != NULL)) + /* we have not pushed out headers yet, parse input */ + if (!state->header_sent) + { + /* try to parse header ... */ + memcpy(state->httpbuf, buf, len); + + if (uh_cgi_header_parse(res, state->httpbuf, len, &hdroff)) { - /* build environment */ - clearenv(); + /* write status */ + ensure_out(uh_http_sendf(state->cl, NULL, + "HTTP/%.1f %03d %s\r\n" + "Connection: close\r\n", + req->version, res->statuscode, res->statusmsg)); + + /* add Content-Type if no Location or Content-Type */ + if (!uh_cgi_header_lookup(res, "Location") && + !uh_cgi_header_lookup(res, "Content-Type")) + { + ensure_out(uh_http_send(state->cl, NULL, + "Content-Type: text/plain\r\n", -1)); + } - /* common information */ - setenv("GATEWAY_INTERFACE", "CGI/1.1", 1); - setenv("SERVER_SOFTWARE", "uHTTPd", 1); - setenv("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1); + /* if request was HTTP 1.1 we'll respond chunked */ + if ((req->version > 1.0) && + !uh_cgi_header_lookup(res, "Transfer-Encoding")) + { + ensure_out(uh_http_send(state->cl, NULL, + "Transfer-Encoding: chunked\r\n", -1)); + } -#ifdef HAVE_TLS - /* https? */ - if (cl->tls) - setenv("HTTPS", "on", 1); -#endif + /* write headers from CGI program */ + foreach_header(i, res->headers) + { + ensure_out(uh_http_sendf(state->cl, NULL, "%s: %s\r\n", + res->headers[i], res->headers[i+1])); + } + + /* terminate header */ + ensure_out(uh_http_send(state->cl, NULL, "\r\n", -1)); - /* addresses */ - setenv("SERVER_NAME", sa_straddr(&cl->servaddr), 1); - setenv("SERVER_ADDR", sa_straddr(&cl->servaddr), 1); - setenv("SERVER_PORT", sa_strport(&cl->servaddr), 1); - setenv("REMOTE_HOST", sa_straddr(&cl->peeraddr), 1); - setenv("REMOTE_ADDR", sa_straddr(&cl->peeraddr), 1); - setenv("REMOTE_PORT", sa_strport(&cl->peeraddr), 1); - - /* path information */ - setenv("SCRIPT_NAME", pi->name, 1); - setenv("SCRIPT_FILENAME", pi->phys, 1); - setenv("DOCUMENT_ROOT", pi->root, 1); - setenv("QUERY_STRING", pi->query ? pi->query : "", 1); - - if (pi->info) - setenv("PATH_INFO", pi->info, 1); - - /* REDIRECT_STATUS, php-cgi wants it */ - switch (req->redirect_status) + state->header_sent = true; + + /* push out remaining head buffer */ + if (hdroff < len) { - case 404: - setenv("REDIRECT_STATUS", "404", 1); - break; + D("CGI: Child(%d) relaying %d rest bytes\n", + state->cl->proc.pid, len - hdroff); - default: - setenv("REDIRECT_STATUS", "200", 1); - break; + ensure_out(uh_http_send(state->cl, req, + &buf[hdroff], len - hdroff)); } + } - /* http version */ - if (req->version > 1.0) - setenv("SERVER_PROTOCOL", "HTTP/1.1", 1); - else - setenv("SERVER_PROTOCOL", "HTTP/1.0", 1); + /* ... failed and head buffer exceeded */ + else + { + /* I would do this ... + * + * uh_cgi_error_500(cl, req, + * "The CGI program generated an " + * "invalid response:\n\n"); + * + * ... but in order to stay as compatible as possible, + * treat whatever we got as text/plain response and + * build the required headers here. + */ + + ensure_out(uh_http_sendf(state->cl, NULL, + "HTTP/%.1f 200 OK\r\n" + "Content-Type: text/plain\r\n" + "%s\r\n", + req->version, (req->version > 1.0) + ? "Transfer-Encoding: chunked\r\n" : "" + )); + + state->header_sent = true; + + D("CGI: Child(%d) relaying %d invalid bytes\n", + state->cl->proc.pid, len); + + ensure_out(uh_http_send(state->cl, req, buf, len)); + } + } + else + { + /* headers complete, pass through buffer to socket */ + D("CGI: Child(%d) relaying %d normal bytes\n", + state->cl->proc.pid, len); - /* request method */ - switch (req->method) - { - case UH_HTTP_MSG_GET: - setenv("REQUEST_METHOD", "GET", 1); - break; + ensure_out(uh_http_send(state->cl, req, buf, len)); + } + } - case UH_HTTP_MSG_HEAD: - setenv("REQUEST_METHOD", "HEAD", 1); - break; + /* child has been marked dead by timeout or child handler, bail out */ + if (false && cl->dead) + { + D("CGI: Child(%d) is marked dead, returning\n", state->cl->proc.pid); + goto out; + } - case UH_HTTP_MSG_POST: - setenv("REQUEST_METHOD", "POST", 1); - break; - } + if ((len == 0) || + ((errno != EAGAIN) && (errno != EWOULDBLOCK) && (len == -1))) + { + D("CGI: Child(%d) presumed dead [%s]\n", + state->cl->proc.pid, strerror(errno)); - /* request url */ - setenv("REQUEST_URI", req->url, 1); + goto out; + } - /* remote user */ - if (req->realm) - setenv("REMOTE_USER", req->realm->user, 1); + return true; - /* request message headers */ - foreach_header(i, req->headers) - { - if (!strcasecmp(req->headers[i], "Accept")) - setenv("HTTP_ACCEPT", req->headers[i+1], 1); +out: + if (!state->header_sent) + { + if (state->cl->timeout.pending) + uh_http_sendhf(state->cl, 502, "Bad Gateway", + "The CGI process did not produce any response\n"); + else + uh_http_sendhf(state->cl, 504, "Gateway Timeout", + "The CGI process took too long to produce a " + "response\n"); + } + else + { + uh_http_send(state->cl, req, "", 0); + } - else if (!strcasecmp(req->headers[i], "Accept-Charset")) - setenv("HTTP_ACCEPT_CHARSET", req->headers[i+1], 1); + uh_cgi_shutdown(state); + return false; +} - else if (!strcasecmp(req->headers[i], "Accept-Encoding")) - setenv("HTTP_ACCEPT_ENCODING", req->headers[i+1], 1); +bool uh_cgi_request(struct client *cl, struct path_info *pi, + struct interpreter *ip) +{ + int i; - else if (!strcasecmp(req->headers[i], "Accept-Language")) - setenv("HTTP_ACCEPT_LANGUAGE", req->headers[i+1], 1); + int rfd[2] = { 0, 0 }; + int wfd[2] = { 0, 0 }; - else if (!strcasecmp(req->headers[i], "Authorization")) - setenv("HTTP_AUTHORIZATION", req->headers[i+1], 1); + pid_t child; - else if (!strcasecmp(req->headers[i], "Connection")) - setenv("HTTP_CONNECTION", req->headers[i+1], 1); + struct uh_cgi_state *state; + struct http_request *req = &cl->request; - else if (!strcasecmp(req->headers[i], "Cookie")) - setenv("HTTP_COOKIE", req->headers[i+1], 1); + /* allocate state */ + if (!(state = malloc(sizeof(*state)))) + { + uh_http_sendhf(cl, 500, "Internal Server Error", "Out of memory"); + return false; + } - else if (!strcasecmp(req->headers[i], "Host")) - setenv("HTTP_HOST", req->headers[i+1], 1); + /* spawn pipes for me->child, child->me */ + if ((pipe(rfd) < 0) || (pipe(wfd) < 0)) + { + if (rfd[0] > 0) close(rfd[0]); + if (rfd[1] > 0) close(rfd[1]); + if (wfd[0] > 0) close(wfd[0]); + if (wfd[1] > 0) close(wfd[1]); - else if (!strcasecmp(req->headers[i], "Referer")) - setenv("HTTP_REFERER", req->headers[i+1], 1); + uh_http_sendhf(cl, 500, "Internal Server Error", + "Failed to create pipe: %s\n", strerror(errno)); + + return false; + } - else if (!strcasecmp(req->headers[i], "User-Agent")) - setenv("HTTP_USER_AGENT", req->headers[i+1], 1); + /* fork off child process */ + switch ((child = fork())) + { + /* oops */ + case -1: + uh_http_sendhf(cl, 500, "Internal Server Error", + "Failed to fork child: %s\n", strerror(errno)); - else if (!strcasecmp(req->headers[i], "Content-Type")) - setenv("CONTENT_TYPE", req->headers[i+1], 1); + return false; - else if (!strcasecmp(req->headers[i], "Content-Length")) - setenv("CONTENT_LENGTH", req->headers[i+1], 1); - } + /* exec child */ + case 0: +#ifdef DEBUG + sleep(atoi(getenv("UHTTPD_SLEEP_ON_FORK") ?: "0")); +#endif + /* close loose pipe ends */ + close(rfd[0]); + close(wfd[1]); - /* execute child code ... */ - if (chdir(pi->root)) - perror("chdir()"); + /* patch stdout and stdin to pipes */ + dup2(rfd[1], 1); + dup2(wfd[0], 0); - if (ip != NULL) - execl(ip->path, ip->path, pi->phys, NULL); - else - execl(pi->phys, pi->phys, NULL); + /* avoid leaking our pipe into child-child processes */ + fd_cloexec(rfd[1]); + fd_cloexec(wfd[0]); - /* in case it fails ... */ - printf("Status: 500 Internal Server Error\r\n\r\n" - "Unable to launch the requested CGI program:\n" - " %s: %s\n", - ip ? ip->path : pi->phys, strerror(errno)); + /* check for regular, world-executable file _or_ interpreter */ + if (((pi->stat.st_mode & S_IFREG) && + (pi->stat.st_mode & S_IXOTH)) || (ip != NULL)) + { + /* build environment */ + clearenv(); + + /* common information */ + setenv("GATEWAY_INTERFACE", "CGI/1.1", 1); + setenv("SERVER_SOFTWARE", "uHTTPd", 1); + setenv("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1); + +#ifdef HAVE_TLS + /* https? */ + if (cl->tls) + setenv("HTTPS", "on", 1); +#endif + + /* addresses */ + setenv("SERVER_NAME", sa_straddr(&cl->servaddr), 1); + setenv("SERVER_ADDR", sa_straddr(&cl->servaddr), 1); + setenv("SERVER_PORT", sa_strport(&cl->servaddr), 1); + setenv("REMOTE_HOST", sa_straddr(&cl->peeraddr), 1); + setenv("REMOTE_ADDR", sa_straddr(&cl->peeraddr), 1); + setenv("REMOTE_PORT", sa_strport(&cl->peeraddr), 1); + + /* path information */ + setenv("SCRIPT_NAME", pi->name, 1); + setenv("SCRIPT_FILENAME", pi->phys, 1); + setenv("DOCUMENT_ROOT", pi->root, 1); + setenv("QUERY_STRING", pi->query ? pi->query : "", 1); + + if (pi->info) + setenv("PATH_INFO", pi->info, 1); + + /* REDIRECT_STATUS, php-cgi wants it */ + switch (req->redirect_status) + { + case 404: + setenv("REDIRECT_STATUS", "404", 1); + break; + + default: + setenv("REDIRECT_STATUS", "200", 1); + break; } - /* 403 */ + /* http version */ + if (req->version > 1.0) + setenv("SERVER_PROTOCOL", "HTTP/1.1", 1); else + setenv("SERVER_PROTOCOL", "HTTP/1.0", 1); + + /* request method */ + switch (req->method) { - printf("Status: 403 Forbidden\r\n\r\n" - "Access to this resource is forbidden\n"); - } + case UH_HTTP_MSG_GET: + setenv("REQUEST_METHOD", "GET", 1); + break; - close(wfd[0]); - close(rfd[1]); - exit(0); + case UH_HTTP_MSG_HEAD: + setenv("REQUEST_METHOD", "HEAD", 1); + break; - break; + case UH_HTTP_MSG_POST: + setenv("REQUEST_METHOD", "POST", 1); + break; + } - /* parent; handle I/O relaying */ - default: - /* close unneeded pipe ends */ - close(rfd[1]); - close(wfd[0]); + /* request url */ + setenv("REQUEST_URI", req->url, 1); - /* max watch fd */ - fd_max = max(rfd[0], wfd[1]) + 1; + /* remote user */ + if (req->realm) + setenv("REMOTE_USER", req->realm->user, 1); - /* find content length */ - if (req->method == UH_HTTP_MSG_POST) + /* request message headers */ + foreach_header(i, req->headers) { - foreach_header(i, req->headers) - { - if (!strcasecmp(req->headers[i], "Content-Length")) - { - content_length = atoi(req->headers[i+1]); - break; - } - } - } + if (!strcasecmp(req->headers[i], "Accept")) + setenv("HTTP_ACCEPT", req->headers[i+1], 1); + else if (!strcasecmp(req->headers[i], "Accept-Charset")) + setenv("HTTP_ACCEPT_CHARSET", req->headers[i+1], 1); - memset(hdr, 0, sizeof(hdr)); + else if (!strcasecmp(req->headers[i], "Accept-Encoding")) + setenv("HTTP_ACCEPT_ENCODING", req->headers[i+1], 1); - /* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */ - while (1) - { - FD_ZERO(&reader); - FD_ZERO(&writer); + else if (!strcasecmp(req->headers[i], "Accept-Language")) + setenv("HTTP_ACCEPT_LANGUAGE", req->headers[i+1], 1); - FD_SET(rfd[0], &reader); - FD_SET(wfd[1], &writer); + else if (!strcasecmp(req->headers[i], "Authorization")) + setenv("HTTP_AUTHORIZATION", req->headers[i+1], 1); - timeout.tv_sec = (header_sent < 1) ? cl->server->conf->script_timeout : 3; - timeout.tv_usec = 0; + else if (!strcasecmp(req->headers[i], "Connection")) + setenv("HTTP_CONNECTION", req->headers[i+1], 1); - ensure_out(rv = select_intr(fd_max, &reader, - (content_length > -1) - ? &writer : NULL, - NULL, &timeout)); + else if (!strcasecmp(req->headers[i], "Cookie")) + setenv("HTTP_COOKIE", req->headers[i+1], 1); - /* timeout */ - if (rv == 0) - { - ensure_out(kill(child, 0)); - } + else if (!strcasecmp(req->headers[i], "Host")) + setenv("HTTP_HOST", req->headers[i+1], 1); - /* wait until we can read or write or both */ - else if (rv > 0) - { - /* ready to write to cgi program */ - if (FD_ISSET(wfd[1], &writer)) - { - /* there is unread post data waiting */ - if (content_length > 0) - { - /* read it from socket ... */ - ensure_out(buflen = uh_tcp_recv(cl, buf, - min(content_length, sizeof(buf)))); + else if (!strcasecmp(req->headers[i], "Referer")) + setenv("HTTP_REFERER", req->headers[i+1], 1); - if (buflen > 0) - { - /* ... and write it to child's stdin */ - if (write(wfd[1], buf, buflen) < 0) - perror("write()"); + else if (!strcasecmp(req->headers[i], "User-Agent")) + setenv("HTTP_USER_AGENT", req->headers[i+1], 1); - content_length -= buflen; - } + else if (!strcasecmp(req->headers[i], "Content-Type")) + setenv("CONTENT_TYPE", req->headers[i+1], 1); - /* unexpected eof! */ - else - { - if (write(wfd[1], "", 0) < 0) - perror("write()"); + else if (!strcasecmp(req->headers[i], "Content-Length")) + setenv("CONTENT_LENGTH", req->headers[i+1], 1); + } - content_length = 0; - } - } - /* there is no more post data, close pipe to child's stdin */ - else if (content_length > -1) - { - close(wfd[1]); - content_length = -1; - } - } + /* execute child code ... */ + if (chdir(pi->root)) + perror("chdir()"); - /* ready to read from cgi program */ - if (FD_ISSET(rfd[0], &reader)) - { - /* read data from child ... */ - if ((buflen = read(rfd[0], buf, sizeof(buf))) > 0) - { - /* we have not pushed out headers yet, parse input */ - if (!header_sent) - { - /* head buffer not full and no end yet */ - if (hdrlen < sizeof(hdr)) - { - bufoff = min(buflen, sizeof(hdr) - hdrlen); - memcpy(&hdr[hdrlen], buf, bufoff); - hdrlen += bufoff; - } - else - { - bufoff = 0; - } - - - /* try to parse header ... */ - if ((res = uh_cgi_header_parse(hdr, hdrlen, &hdroff)) != NULL) - { - /* write status */ - ensure_out(uh_http_sendf(cl, NULL, - "HTTP/%.1f %03d %s\r\n" - "Connection: close\r\n", - req->version, res->statuscode, - res->statusmsg)); - - /* add Content-Type if no Location or Content-Type */ - if( !uh_cgi_header_lookup(res, "Location") && - !uh_cgi_header_lookup(res, "Content-Type") - ) { - ensure_out(uh_http_send(cl, NULL, - "Content-Type: text/plain\r\n", -1)); - } - - /* if request was HTTP 1.1 we'll respond chunked */ - if( (req->version > 1.0) && - !uh_cgi_header_lookup(res, "Transfer-Encoding") - ) { - ensure_out(uh_http_send(cl, NULL, - "Transfer-Encoding: chunked\r\n", -1)); - } - - /* write headers from CGI program */ - foreach_header(i, res->headers) - { - ensure_out(uh_http_sendf(cl, NULL, "%s: %s\r\n", - res->headers[i], res->headers[i+1])); - } - - /* terminate header */ - ensure_out(uh_http_send(cl, NULL, "\r\n", -1)); - - /* push out remaining head buffer */ - if (hdroff < hdrlen) - ensure_out(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff)); - } - - /* ... failed and head buffer exceeded */ - else if (hdrlen >= sizeof(hdr)) - { - ensure_out(uh_cgi_error_500(cl, req, - "The CGI program generated an invalid response:\n\n")); - - ensure_out(uh_http_send(cl, req, hdr, hdrlen)); - } - - /* ... failed but free buffer space, try again */ - else - { - continue; - } - - /* push out remaining read buffer */ - if (bufoff < buflen) - ensure_out(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff)); - - header_sent = 1; - continue; - } + if (ip != NULL) + execl(ip->path, ip->path, pi->phys, NULL); + else + execl(pi->phys, pi->phys, NULL); + /* in case it fails ... */ + printf("Status: 500 Internal Server Error\r\n\r\n" + "Unable to launch the requested CGI program:\n" + " %s: %s\n", ip ? ip->path : pi->phys, strerror(errno)); + } - /* headers complete, pass through buffer to socket */ - ensure_out(uh_http_send(cl, req, buf, buflen)); - } + /* 403 */ + else + { + printf("Status: 403 Forbidden\r\n\r\n" + "Access to this resource is forbidden\n"); + } - /* looks like eof from child */ - else - { - /* cgi script did not output useful stuff at all */ - if (!header_sent) - { - /* I would do this ... - * - * uh_cgi_error_500(cl, req, - * "The CGI program generated an " - * "invalid response:\n\n"); - * - * ... but in order to stay as compatible as possible, - * treat whatever we got as text/plain response and - * build the required headers here. - */ - - ensure_out(uh_http_sendf(cl, NULL, - "HTTP/%.1f 200 OK\r\n" - "Content-Type: text/plain\r\n" - "%s\r\n", - req->version, (req->version > 1.0) - ? "Transfer-Encoding: chunked\r\n" : "" - )); - - ensure_out(uh_http_send(cl, req, hdr, hdrlen)); - } + close(wfd[0]); + close(rfd[1]); + exit(0); - /* send final chunk if we're in chunked transfer mode */ - ensure_out(uh_http_send(cl, req, "", 0)); - break; - } - } - } + break; - /* timeout exceeded or interrupted by SIGCHLD */ - else - { - if ((errno != EINTR) && ! header_sent) - { - ensure_out(uh_http_sendhf(cl, 504, "Gateway Timeout", - "The CGI script took too long to produce " - "a response")); - } + /* parent; handle I/O relaying */ + default: + memset(state, 0, sizeof(*state)); + + state->cl = cl; + state->cl->proc.pid = child; + + /* close unneeded pipe ends */ + close(rfd[1]); + close(wfd[0]); - /* send final chunk if we're in chunked transfer mode */ - ensure_out(uh_http_send(cl, req, "", 0)); + D("CGI: Child(%d) created: rfd(%d) wfd(%d)\n", child, rfd[0], wfd[1]); + state->content_length = cl->httpbuf.len; + + /* find content length */ + if (req->method == UH_HTTP_MSG_POST) + { + foreach_header(i, req->headers) + { + if (!strcasecmp(req->headers[i], "Content-Length")) + { + state->content_length = atoi(req->headers[i+1]); break; } } + } - out: - close(rfd[0]); - close(wfd[1]); + state->rfd = rfd[0]; + fd_nonblock(state->rfd); - if (!kill(child, 0)) - { - kill(child, SIGTERM); - waitpid(child, NULL, 0); - } + state->wfd = wfd[1]; + fd_nonblock(state->wfd); - break; + cl->cb = uh_cgi_socket_cb; + cl->priv = state; + + break; } + + return true; } diff --git a/package/uhttpd/src/uhttpd-cgi.h b/package/uhttpd/src/uhttpd-cgi.h index cb84dae0c..18816bae1 100644 --- a/package/uhttpd/src/uhttpd-cgi.h +++ b/package/uhttpd/src/uhttpd-cgi.h @@ -1,7 +1,7 @@ /* * uhttpd - Tiny single-threaded httpd - CGI header * - * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org> + * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -24,9 +24,19 @@ #include <sys/types.h> #include <linux/limits.h> -void uh_cgi_request( - struct client *cl, struct http_request *req, - struct path_info *pi, struct interpreter *ip -); +#include <time.h> + + +struct uh_cgi_state { + int rfd; + int wfd; + struct client *cl; + char httpbuf[UH_LIMIT_MSGHEAD]; + int content_length; + bool header_sent; +}; + +bool uh_cgi_request(struct client *cl, struct path_info *pi, + struct interpreter *ip); #endif diff --git a/package/uhttpd/src/uhttpd-file.c b/package/uhttpd/src/uhttpd-file.c index 0d9a207b1..2e5914a3c 100644 --- a/package/uhttpd/src/uhttpd-file.c +++ b/package/uhttpd/src/uhttpd-file.c @@ -1,7 +1,7 @@ /* * uhttpd - Tiny single-threaded httpd - Static file handler * - * Copyright (C) 2010-2011 Jo-Philipp Wich <xm@subsignal.org> + * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -83,22 +83,21 @@ static char * uh_file_unix2date(time_t ts) return str; } -static char * uh_file_header_lookup(struct http_request *req, const char *name) +static char * uh_file_header_lookup(struct client *cl, const char *name) { int i; - foreach_header(i, req->headers) + foreach_header(i, cl->request.headers) { - if (!strcasecmp(req->headers[i], name)) - return req->headers[i+1]; + if (!strcasecmp(cl->request.headers[i], name)) + return cl->request.headers[i+1]; } return NULL; } -static int uh_file_response_ok_hdrs(struct client *cl, struct http_request *req, - struct stat *s) +static int uh_file_response_ok_hdrs(struct client *cl, struct stat *s) { ensure_ret(uh_http_sendf(cl, NULL, "Connection: close\r\n")); @@ -112,32 +111,33 @@ static int uh_file_response_ok_hdrs(struct client *cl, struct http_request *req, return uh_http_sendf(cl, NULL, "Date: %s\r\n", uh_file_unix2date(time(NULL))); } -static int uh_file_response_200(struct client *cl, struct http_request *req, - struct stat *s) +static int uh_file_response_200(struct client *cl, struct stat *s) { - ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 200 OK\r\n", req->version)); - return uh_file_response_ok_hdrs(cl, req, s); + ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 200 OK\r\n", + cl->request.version)); + + return uh_file_response_ok_hdrs(cl, s); } -static int uh_file_response_304(struct client *cl, struct http_request *req, - struct stat *s) +static int uh_file_response_304(struct client *cl, struct stat *s) { - ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 304 Not Modified\r\n", req->version)); - return uh_file_response_ok_hdrs(cl, req, s); + ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 304 Not Modified\r\n", + cl->request.version)); + + return uh_file_response_ok_hdrs(cl, s); } -static int uh_file_response_412(struct client *cl, struct http_request *req) +static int uh_file_response_412(struct client *cl) { return uh_http_sendf(cl, NULL, - "HTTP/%.1f 412 Precondition Failed\r\n" - "Connection: close\r\n", req->version); + "HTTP/%.1f 412 Precondition Failed\r\n" + "Connection: close\r\n", cl->request.version); } -static int uh_file_if_match(struct client *cl, struct http_request *req, - struct stat *s, int *ok) +static int uh_file_if_match(struct client *cl, struct stat *s, int *ok) { const char *tag = uh_file_mktag(s); - char *hdr = uh_file_header_lookup(req, "If-Match"); + char *hdr = uh_file_header_lookup(cl, "If-Match"); char *p; int i; @@ -160,7 +160,7 @@ static int uh_file_if_match(struct client *cl, struct http_request *req, } *ok = 0; - ensure_ret(uh_file_response_412(cl, req)); + ensure_ret(uh_file_response_412(cl)); return *ok; } @@ -168,11 +168,9 @@ static int uh_file_if_match(struct client *cl, struct http_request *req, return *ok; } -static int uh_file_if_modified_since(struct client *cl, - struct http_request *req, struct stat *s, - int *ok) +static int uh_file_if_modified_since(struct client *cl, struct stat *s, int *ok) { - char *hdr = uh_file_header_lookup(req, "If-Modified-Since"); + char *hdr = uh_file_header_lookup(cl, "If-Modified-Since"); *ok = 1; if (hdr) @@ -180,18 +178,17 @@ static int uh_file_if_modified_since(struct client *cl, if (uh_file_date2unix(hdr) >= s->st_mtime) { *ok = 0; - ensure_ret(uh_file_response_304(cl, req, s)); + ensure_ret(uh_file_response_304(cl, s)); } } return *ok; } -static int uh_file_if_none_match(struct client *cl, struct http_request *req, - struct stat *s, int *ok) +static int uh_file_if_none_match(struct client *cl, struct stat *s, int *ok) { const char *tag = uh_file_mktag(s); - char *hdr = uh_file_header_lookup(req, "If-None-Match"); + char *hdr = uh_file_header_lookup(cl, "If-None-Match"); char *p; int i; *ok = 1; @@ -211,14 +208,14 @@ static int uh_file_if_none_match(struct client *cl, struct http_request *req, { *ok = 0; - if ((req->method == UH_HTTP_MSG_GET) || - (req->method == UH_HTTP_MSG_HEAD)) + if ((cl->request.method == UH_HTTP_MSG_GET) || + (cl->request.method == UH_HTTP_MSG_HEAD)) { - ensure_ret(uh_file_response_304(cl, req, s)); + ensure_ret(uh_file_response_304(cl, s)); } else { - ensure_ret(uh_file_response_412(cl, req)); + ensure_ret(uh_file_response_412(cl)); } break; @@ -229,26 +226,24 @@ static int uh_file_if_none_match(struct client *cl, struct http_request *req, return *ok; } -static int uh_file_if_range(struct client *cl, struct http_request *req, - struct stat *s, int *ok) +static int uh_file_if_range(struct client *cl, struct stat *s, int *ok) { - char *hdr = uh_file_header_lookup(req, "If-Range"); + char *hdr = uh_file_header_lookup(cl, "If-Range"); *ok = 1; if (hdr) { *ok = 0; - ensure_ret(uh_file_response_412(cl, req)); + ensure_ret(uh_file_response_412(cl)); } return *ok; } -static int uh_file_if_unmodified_since(struct client *cl, - struct http_request *req, struct stat *s, +static int uh_file_if_unmodified_since(struct client *cl, struct stat *s, int *ok) { - char *hdr = uh_file_header_lookup(req, "If-Unmodified-Since"); + char *hdr = uh_file_header_lookup(cl, "If-Unmodified-Since"); *ok = 1; if (hdr) @@ -256,7 +251,7 @@ static int uh_file_if_unmodified_since(struct client *cl, if (uh_file_date2unix(hdr) <= s->st_mtime) { *ok = 0; - ensure_ret(uh_file_response_412(cl, req)); + ensure_ret(uh_file_response_412(cl)); } } @@ -269,8 +264,7 @@ static int uh_file_scandir_filter_dir(const struct dirent *e) return strcmp(e->d_name, ".") ? 1 : 0; } -static void uh_file_dirlist(struct client *cl, struct http_request *req, - struct path_info *pi) +static void uh_file_dirlist(struct client *cl, struct path_info *pi) { int i; int count = 0; @@ -279,7 +273,7 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req, struct dirent **files = NULL; struct stat s; - ensure_out(uh_http_sendf(cl, req, + ensure_out(uh_http_sendf(cl, &cl->request, "<html><head><title>Index of %s</title></head>" "<body><h1>Index of %s</h1><hr /><ol>", pi->name, pi->name)); @@ -300,7 +294,7 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req, if (!stat(filename, &s) && (s.st_mode & S_IFDIR) && (s.st_mode & S_IXOTH)) { - ensure_out(uh_http_sendf(cl, req, + ensure_out(uh_http_sendf(cl, &cl->request, "<li><strong><a href='%s%s'>%s</a>/" "</strong><br /><small>modified: %s" "<br />directory - %.02f kbyte<br />" @@ -323,7 +317,7 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req, if (!stat(filename, &s) && !(s.st_mode & S_IFDIR) && (s.st_mode & S_IROTH)) { - ensure_out(uh_http_sendf(cl, req, + ensure_out(uh_http_sendf(cl, &cl->request, "<li><strong><a href='%s%s'>%s</a>" "</strong><br /><small>modified: %s" "<br />%s - %.02f kbyte<br />" @@ -339,8 +333,8 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req, } } - ensure_out(uh_http_sendf(cl, req, "</ol><hr /></body></html>")); - ensure_out(uh_http_sendf(cl, req, "")); + ensure_out(uh_http_sendf(cl, &cl->request, "</ol><hr /></body></html>")); + ensure_out(uh_http_sendf(cl, &cl->request, "")); out: if (files) @@ -353,7 +347,7 @@ out: } -void uh_file_request(struct client *cl, struct http_request *req, struct path_info *pi) +bool uh_file_request(struct client *cl, struct path_info *pi) { int rlen; int ok = 1; @@ -364,36 +358,43 @@ void uh_file_request(struct client *cl, struct http_request *req, struct path_in if ((pi->stat.st_mode & S_IFREG) && ((fd = open(pi->phys, O_RDONLY)) > 0)) { /* test preconditions */ - if (ok) ensure_out(uh_file_if_modified_since(cl, req, &pi->stat, &ok)); - if (ok) ensure_out(uh_file_if_match(cl, req, &pi->stat, &ok)); - if (ok) ensure_out(uh_file_if_range(cl, req, &pi->stat, &ok)); - if (ok) ensure_out(uh_file_if_unmodified_since(cl, req, &pi->stat, &ok)); - if (ok) ensure_out(uh_file_if_none_match(cl, req, &pi->stat, &ok)); + if (ok) ensure_out(uh_file_if_modified_since(cl, &pi->stat, &ok)); + if (ok) ensure_out(uh_file_if_match(cl, &pi->stat, &ok)); + if (ok) ensure_out(uh_file_if_range(cl, &pi->stat, &ok)); + if (ok) ensure_out(uh_file_if_unmodified_since(cl, &pi->stat, &ok)); + if (ok) ensure_out(uh_file_if_none_match(cl, &pi->stat, &ok)); if (ok > 0) { /* write status */ - ensure_out(uh_file_response_200(cl, req, &pi->stat)); + ensure_out(uh_file_response_200(cl, &pi->stat)); + + ensure_out(uh_http_sendf(cl, NULL, "Content-Type: %s\r\n", + uh_file_mime_lookup(pi->name))); - ensure_out(uh_http_sendf(cl, NULL, "Content-Type: %s\r\n", uh_file_mime_lookup(pi->name))); - ensure_out(uh_http_sendf(cl, NULL, "Content-Length: %i\r\n", pi->stat.st_size)); + ensure_out(uh_http_sendf(cl, NULL, "Content-Length: %i\r\n", + pi->stat.st_size)); /* if request was HTTP 1.1 we'll respond chunked */ - if ((req->version > 1.0) && (req->method != UH_HTTP_MSG_HEAD)) - ensure_out(uh_http_send(cl, NULL, "Transfer-Encoding: chunked\r\n", -1)); + if ((cl->request.version > 1.0) && + (cl->request.method != UH_HTTP_MSG_HEAD)) + { + ensure_out(uh_http_send(cl, NULL, + "Transfer-Encoding: chunked\r\n", -1)); + } /* close header */ ensure_out(uh_http_send(cl, NULL, "\r\n", -1)); /* send body */ - if (req->method != UH_HTTP_MSG_HEAD) + if (cl->request.method != UH_HTTP_MSG_HEAD) { /* pump file data */ while ((rlen = read(fd, buf, sizeof(buf))) > 0) - ensure_out(uh_http_send(cl, req, buf, rlen)); + ensure_out(uh_http_send(cl, &cl->request, buf, rlen)); /* send trailer in chunked mode */ - ensure_out(uh_http_send(cl, req, "", 0)); + ensure_out(uh_http_send(cl, &cl->request, "", 0)); } } @@ -408,25 +409,29 @@ void uh_file_request(struct client *cl, struct http_request *req, struct path_in else if ((pi->stat.st_mode & S_IFDIR) && !cl->server->conf->no_dirlists) { /* write status */ - ensure_out(uh_file_response_200(cl, req, NULL)); + ensure_out(uh_file_response_200(cl, NULL)); - if (req->version > 1.0) - ensure_out(uh_http_send(cl, NULL, "Transfer-Encoding: chunked\r\n", -1)); + if (cl->request.version > 1.0) + ensure_out(uh_http_send(cl, NULL, + "Transfer-Encoding: chunked\r\n", -1)); - ensure_out(uh_http_send(cl, NULL, "Content-Type: text/html\r\n\r\n", -1)); + ensure_out(uh_http_send(cl, NULL, + "Content-Type: text/html\r\n\r\n", -1)); /* content */ - uh_file_dirlist(cl, req, pi); + uh_file_dirlist(cl, pi); } /* 403 */ else { ensure_out(uh_http_sendhf(cl, 403, "Forbidden", - "Access to this resource is forbidden")); + "Access to this resource is forbidden")); } out: if (fd > -1) close(fd); + + return false; } diff --git a/package/uhttpd/src/uhttpd-file.h b/package/uhttpd/src/uhttpd-file.h index 3d4681516..08dbe2cf9 100644 --- a/package/uhttpd/src/uhttpd-file.h +++ b/package/uhttpd/src/uhttpd-file.h @@ -31,8 +31,6 @@ struct mimetype { const char *mime; }; -void uh_file_request( - struct client *cl, struct http_request *req, struct path_info *pi -); +bool uh_file_request(struct client *cl, struct path_info *pi); #endif diff --git a/package/uhttpd/src/uhttpd-lua.c b/package/uhttpd/src/uhttpd-lua.c index ea6f26cc9..7d602f7c5 100644 --- a/package/uhttpd/src/uhttpd-lua.c +++ b/package/uhttpd/src/uhttpd-lua.c @@ -1,7 +1,7 @@ /* * uhttpd - Tiny single-threaded httpd - Lua handler * - * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org> + * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -24,54 +24,59 @@ static int uh_lua_recv(lua_State *L) { size_t length; + char buffer[UH_LIMIT_MSGHEAD]; - ssize_t rlen = 0; - fd_set reader; - struct timeval timeout; + + int to = 1; + int fd = fileno(stdin); + int rlen = 0; length = luaL_checknumber(L, 1); if ((length > 0) && (length <= sizeof(buffer))) { - FD_ZERO(&reader); - FD_SET(fileno(stdin), &reader); - - /* fail after 0.1s */ - timeout.tv_sec = 0; - timeout.tv_usec = 100000; + /* receive data */ + rlen = uh_raw_recv(fd, buffer, length, to); - /* check whether fd is readable */ - if (select(fileno(stdin) + 1, &reader, NULL, NULL, &timeout) > 0) + /* data read */ + if (rlen > 0) { - /* receive data */ - rlen = read(fileno(stdin), buffer, length); lua_pushnumber(L, rlen); + lua_pushlstring(L, buffer, rlen); + return 2; + } - if (rlen > 0) - { - lua_pushlstring(L, buffer, rlen); - return 2; - } - + /* eof */ + else if (rlen == 0) + { + lua_pushnumber(L, 0); return 1; } /* no, timeout and actually no data */ - lua_pushnumber(L, -2); - return 1; + else + { + lua_pushnumber(L, -1); + return 1; + } } /* parameter error */ - lua_pushnumber(L, -3); + lua_pushnumber(L, -2); return 1; } static int uh_lua_send_common(lua_State *L, int chunked) { size_t length; - const char *buffer; + char chunk[16]; - ssize_t slen = 0; + const char *buffer; + + int rv; + int to = 1; + int fd = fileno(stdout); + int slen = 0; buffer = luaL_checklstring(L, 1, &length); @@ -80,20 +85,27 @@ static int uh_lua_send_common(lua_State *L, int chunked) if (length > 0) { snprintf(chunk, sizeof(chunk), "%X\r\n", length); - slen = write(fileno(stdout), chunk, strlen(chunk)); - slen += write(fileno(stdout), buffer, length); - slen += write(fileno(stdout), "\r\n", 2); + + ensure_out(rv = uh_raw_send(fd, chunk, strlen(chunk), to)); + slen += rv; + + ensure_out(rv = uh_raw_send(fd, buffer, length, to)); + slen += rv; + + ensure_out(rv = uh_raw_send(fd, "\r\n", 2, to)); + slen += rv; } else { - slen = write(fileno(stdout), "0\r\n\r\n", 5); + slen = uh_raw_send(fd, "0\r\n\r\n", 5, to); } } else { - slen = write(fileno(stdout), buffer, length); + slen = uh_raw_send(fd, buffer, length, to); } +out: lua_pushnumber(L, slen); return 1; } @@ -118,8 +130,8 @@ static int uh_lua_str2str(lua_State *L, int (*xlate_func) (char *, int, const ch inbuf = luaL_checklstring(L, 1, &inlen); outlen = (* xlate_func)(outbuf, sizeof(outbuf), inbuf, inlen); if (outlen < 0) - luaL_error( L, "%s on URL-encode codec", - (outlen==-1) ? "buffer overflow" : "malformed string" ); + luaL_error(L, "%s on URL-encode codec", + (outlen==-1) ? "buffer overflow" : "malformed string"); lua_pushlstring(L, outbuf, outlen); return 1; @@ -181,17 +193,17 @@ lua_State * uh_lua_init(const struct config *conf) { case LUA_ERRSYNTAX: fprintf(stderr, - "Lua handler contains syntax errors, unable to continue\n"); + "Lua handler contains syntax errors, unable to continue\n"); exit(1); case LUA_ERRMEM: fprintf(stderr, - "Lua handler ran out of memory, unable to continue\n"); + "Lua handler ran out of memory, unable to continue\n"); exit(1); case LUA_ERRFILE: fprintf(stderr, - "Lua cannot open the handler script, unable to continue\n"); + "Lua cannot open the handler script, unable to continue\n"); exit(1); default: @@ -201,17 +213,17 @@ lua_State * uh_lua_init(const struct config *conf) case LUA_ERRRUN: err_str = luaL_checkstring(L, -1); fprintf(stderr, - "Lua handler had runtime error, unable to continue\n" - "Error: %s\n", err_str - ); + "Lua handler had runtime error, " + "unable to continue\n" + "Error: %s\n", err_str); exit(1); case LUA_ERRMEM: err_str = luaL_checkstring(L, -1); fprintf(stderr, - "Lua handler ran out of memory, unable to continue\n" - "Error: %s\n", err_str - ); + "Lua handler ran out of memory, " + "unable to continue\n" + "Error: %s\n", err_str); exit(1); default: @@ -221,7 +233,8 @@ lua_State * uh_lua_init(const struct config *conf) if (! lua_isfunction(L, -1)) { fprintf(stderr, - "Lua handler provides no " UH_LUA_CALLBACK "(), unable to continue\n"); + "Lua handler provides no "UH_LUA_CALLBACK"(), " + "unable to continue\n"); exit(1); } @@ -235,12 +248,107 @@ lua_State * uh_lua_init(const struct config *conf) return L; } -void uh_lua_request(struct client *cl, struct http_request *req, lua_State *L) +static void uh_lua_shutdown(struct uh_lua_state *state) { - int i, data_sent; - int content_length = 0; - int buflen = 0; - int fd_max = 0; + close(state->rfd); + close(state->wfd); + free(state); +} + +static bool uh_lua_socket_cb(struct client *cl) +{ + int len; + char buf[UH_LIMIT_MSGHEAD]; + + struct uh_lua_state *state = (struct uh_lua_state *)cl->priv; + + /* there is unread post data waiting */ + while (state->content_length > 0) + { + /* remaining data in http head buffer ... */ + if (state->cl->httpbuf.len > 0) + { + len = min(state->content_length, state->cl->httpbuf.len); + + D("Lua: Child(%d) feed %d HTTP buffer bytes\n", + state->cl->proc.pid, len); + + memcpy(buf, state->cl->httpbuf.ptr, len); + + state->cl->httpbuf.len -= len; + state->cl->httpbuf.ptr += len; + } + + /* read it from socket ... */ + else + { + len = uh_tcp_recv(state->cl, buf, + min(state->content_length, sizeof(buf))); + + if ((len < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK))) + break; + + D("Lua: Child(%d) feed %d/%d TCP socket bytes\n", + state->cl->proc.pid, len, + min(state->content_length, sizeof(buf))); + } + + if (len) + state->content_length -= len; + else + state->content_length = 0; + + /* ... write to CGI process */ + len = uh_raw_send(state->wfd, buf, len, + cl->server->conf->script_timeout); + } + + /* try to read data from child */ + while ((len = uh_raw_recv(state->rfd, buf, sizeof(buf), -1)) > 0) + { + /* pass through buffer to socket */ + D("Lua: Child(%d) relaying %d normal bytes\n", state->cl->proc.pid, len); + ensure_out(uh_tcp_send(state->cl, buf, len)); + state->data_sent = true; + } + + /* child has been marked dead by timeout or child handler, bail out */ + if (false && cl->dead) + { + D("Lua: Child(%d) is marked dead, returning\n", state->cl->proc.pid); + goto out; + } + + if ((len == 0) || + ((errno != EAGAIN) && (errno != EWOULDBLOCK) && (len == -1))) + { + D("Lua: Child(%d) presumed dead [%s]\n", + state->cl->proc.pid, strerror(errno)); + + goto out; + } + + return true; + +out: + if (!state->data_sent) + { + if (state->cl->timeout.pending) + uh_http_sendhf(state->cl, 502, "Bad Gateway", + "The Lua process did not produce any response\n"); + else + uh_http_sendhf(state->cl, 504, "Gateway Timeout", + "The Lua process took too long to produce a " + "response\n"); + } + + uh_lua_shutdown(state); + return false; +} + +bool uh_lua_request(struct client *cl, lua_State *L) +{ + int i; char *query_string; const char *prefix = cl->server->conf->lua_prefix; const char *err_str = NULL; @@ -248,325 +356,243 @@ void uh_lua_request(struct client *cl, struct http_request *req, lua_State *L) int rfd[2] = { 0, 0 }; int wfd[2] = { 0, 0 }; - char buf[UH_LIMIT_MSGHEAD]; - pid_t child; - fd_set reader; - fd_set writer; + struct uh_lua_state *state; + struct http_request *req = &cl->request; - struct sigaction sa; - struct timeval timeout; + int content_length = cl->httpbuf.len; + /* allocate state */ + if (!(state = malloc(sizeof(*state)))) + { + uh_client_error(cl, 500, "Internal Server Error", "Out of memory"); + return false; + } + /* spawn pipes for me->child, child->me */ if ((pipe(rfd) < 0) || (pipe(wfd) < 0)) { - uh_http_sendhf(cl, 500, "Internal Server Error", - "Failed to create pipe: %s", strerror(errno)); - if (rfd[0] > 0) close(rfd[0]); if (rfd[1] > 0) close(rfd[1]); if (wfd[0] > 0) close(wfd[0]); if (wfd[1] > 0) close(wfd[1]); - return; + uh_client_error(cl, 500, "Internal Server Error", + "Failed to create pipe: %s", strerror(errno)); + + return false; } switch ((child = fork())) { - case -1: - uh_http_sendhf(cl, 500, "Internal Server Error", - "Failed to fork child: %s", strerror(errno)); - break; + case -1: + uh_client_error(cl, 500, "Internal Server Error", + "Failed to fork child: %s", strerror(errno)); - case 0: - /* restore SIGTERM */ - sa.sa_flags = 0; - sa.sa_handler = SIG_DFL; - sigemptyset(&sa.sa_mask); - sigaction(SIGTERM, &sa, NULL); + return false; - /* close loose pipe ends */ - close(rfd[0]); - close(wfd[1]); + case 0: +#ifdef DEBUG + sleep(atoi(getenv("UHTTPD_SLEEP_ON_FORK") ?: "0")); +#endif - /* patch stdout and stdin to pipes */ - dup2(rfd[1], 1); - dup2(wfd[0], 0); + /* close loose pipe ends */ + close(rfd[0]); + close(wfd[1]); - /* put handler callback on stack */ - lua_getglobal(L, UH_LUA_CALLBACK); + /* patch stdout and stdin to pipes */ + dup2(rfd[1], 1); + dup2(wfd[0], 0); - /* build env table */ - lua_newtable(L); + /* avoid leaking our pipe into child-child processes */ + fd_cloexec(rfd[1]); + fd_cloexec(wfd[0]); - /* request method */ - switch(req->method) - { - case UH_HTTP_MSG_GET: - lua_pushstring(L, "GET"); - break; + /* put handler callback on stack */ + lua_getglobal(L, UH_LUA_CALLBACK); - case UH_HTTP_MSG_HEAD: - lua_pushstring(L, "HEAD"); - break; + /* build env table */ + lua_newtable(L); - case UH_HTTP_MSG_POST: - lua_pushstring(L, "POST"); - break; - } + /* request method */ + switch(req->method) + { + case UH_HTTP_MSG_GET: + lua_pushstring(L, "GET"); + break; - lua_setfield(L, -2, "REQUEST_METHOD"); + case UH_HTTP_MSG_HEAD: + lua_pushstring(L, "HEAD"); + break; - /* request url */ - lua_pushstring(L, req->url); - lua_setfield(L, -2, "REQUEST_URI"); + case UH_HTTP_MSG_POST: + lua_pushstring(L, "POST"); + break; + } - /* script name */ - lua_pushstring(L, cl->server->conf->lua_prefix); - lua_setfield(L, -2, "SCRIPT_NAME"); + lua_setfield(L, -2, "REQUEST_METHOD"); - /* query string, path info */ - if ((query_string = strchr(req->url, '?')) != NULL) - { - lua_pushstring(L, query_string + 1); - lua_setfield(L, -2, "QUERY_STRING"); + /* request url */ + lua_pushstring(L, req->url); + lua_setfield(L, -2, "REQUEST_URI"); - if ((int)(query_string - req->url) > strlen(prefix)) - { - lua_pushlstring(L, - &req->url[strlen(prefix)], - (int)(query_string - req->url) - strlen(prefix) - ); + /* script name */ + lua_pushstring(L, cl->server->conf->lua_prefix); + lua_setfield(L, -2, "SCRIPT_NAME"); - lua_setfield(L, -2, "PATH_INFO"); - } - } - else if (strlen(req->url) > strlen(prefix)) + /* query string, path info */ + if ((query_string = strchr(req->url, '?')) != NULL) + { + lua_pushstring(L, query_string + 1); + lua_setfield(L, -2, "QUERY_STRING"); + + if ((int)(query_string - req->url) > strlen(prefix)) { - lua_pushstring(L, &req->url[strlen(prefix)]); + lua_pushlstring(L, + &req->url[strlen(prefix)], + (int)(query_string - req->url) - strlen(prefix) + ); + lua_setfield(L, -2, "PATH_INFO"); } + } + else if (strlen(req->url) > strlen(prefix)) + { + lua_pushstring(L, &req->url[strlen(prefix)]); + lua_setfield(L, -2, "PATH_INFO"); + } - /* http protcol version */ - lua_pushnumber(L, floor(req->version * 10) / 10); - lua_setfield(L, -2, "HTTP_VERSION"); + /* http protcol version */ + lua_pushnumber(L, floor(req->version * 10) / 10); + lua_setfield(L, -2, "HTTP_VERSION"); - if (req->version > 1.0) - lua_pushstring(L, "HTTP/1.1"); - else - lua_pushstring(L, "HTTP/1.0"); + if (req->version > 1.0) + lua_pushstring(L, "HTTP/1.1"); + else + lua_pushstring(L, "HTTP/1.0"); - lua_setfield(L, -2, "SERVER_PROTOCOL"); + lua_setfield(L, -2, "SERVER_PROTOCOL"); - /* address information */ - lua_pushstring(L, sa_straddr(&cl->peeraddr)); - lua_setfield(L, -2, "REMOTE_ADDR"); + /* address information */ + lua_pushstring(L, sa_straddr(&cl->peeraddr)); + lua_setfield(L, -2, "REMOTE_ADDR"); - lua_pushinteger(L, sa_port(&cl->peeraddr)); - lua_setfield(L, -2, "REMOTE_PORT"); + lua_pushinteger(L, sa_port(&cl->peeraddr)); + lua_setfield(L, -2, "REMOTE_PORT"); - lua_pushstring(L, sa_straddr(&cl->servaddr)); - lua_setfield(L, -2, "SERVER_ADDR"); + lua_pushstring(L, sa_straddr(&cl->servaddr)); + lua_setfield(L, -2, "SERVER_ADDR"); - lua_pushinteger(L, sa_port(&cl->servaddr)); - lua_setfield(L, -2, "SERVER_PORT"); + lua_pushinteger(L, sa_port(&cl->servaddr)); + lua_setfield(L, -2, "SERVER_PORT"); - /* essential env vars */ - foreach_header(i, req->headers) + /* essential env vars */ + foreach_header(i, req->headers) + { + if (!strcasecmp(req->headers[i], "Content-Length")) { - if (!strcasecmp(req->headers[i], "Content-Length")) - { - lua_pushnumber(L, atoi(req->headers[i+1])); - lua_setfield(L, -2, "CONTENT_LENGTH"); - } - else if (!strcasecmp(req->headers[i], "Content-Type")) - { - lua_pushstring(L, req->headers[i+1]); - lua_setfield(L, -2, "CONTENT_TYPE"); - } + content_length = atoi(req->headers[i+1]); } - - /* misc. headers */ - lua_newtable(L); - - foreach_header(i, req->headers) + else if (!strcasecmp(req->headers[i], "Content-Type")) { - if( strcasecmp(req->headers[i], "Content-Length") && - strcasecmp(req->headers[i], "Content-Type") - ) { - lua_pushstring(L, req->headers[i+1]); - lua_setfield(L, -2, req->headers[i]); - } + lua_pushstring(L, req->headers[i+1]); + lua_setfield(L, -2, "CONTENT_TYPE"); } + } - lua_setfield(L, -2, "headers"); + lua_pushnumber(L, content_length); + lua_setfield(L, -2, "CONTENT_LENGTH"); + /* misc. headers */ + lua_newtable(L); - /* call */ - switch (lua_pcall(L, 1, 0, 0)) + foreach_header(i, req->headers) + { + if( strcasecmp(req->headers[i], "Content-Length") && + strcasecmp(req->headers[i], "Content-Type")) { - case LUA_ERRMEM: - case LUA_ERRRUN: - err_str = luaL_checkstring(L, -1); - - if (! err_str) - err_str = "Unknown error"; - - printf( - "HTTP/%.1f 500 Internal Server Error\r\n" - "Connection: close\r\n" - "Content-Type: text/plain\r\n" - "Content-Length: %i\r\n\r\n" - "Lua raised a runtime error:\n %s\n", - req->version, 31 + strlen(err_str), err_str - ); - - break; - - default: - break; + lua_pushstring(L, req->headers[i+1]); + lua_setfield(L, -2, req->headers[i]); } + } - close(wfd[0]); - close(rfd[1]); - exit(0); + lua_setfield(L, -2, "headers"); - break; - /* parent; handle I/O relaying */ - default: - /* close unneeded pipe ends */ - close(rfd[1]); - close(wfd[0]); + /* call */ + switch (lua_pcall(L, 1, 0, 0)) + { + case LUA_ERRMEM: + case LUA_ERRRUN: + err_str = luaL_checkstring(L, -1); - /* max watch fd */ - fd_max = max(rfd[0], wfd[1]) + 1; + if (! err_str) + err_str = "Unknown error"; - /* find content length */ - if (req->method == UH_HTTP_MSG_POST) - { - foreach_header(i, req->headers) - { - if (! strcasecmp(req->headers[i], "Content-Length")) - { - content_length = atoi(req->headers[i+1]); - break; - } - } - } + printf("HTTP/%.1f 500 Internal Server Error\r\n" + "Connection: close\r\n" + "Content-Type: text/plain\r\n" + "Content-Length: %i\r\n\r\n" + "Lua raised a runtime error:\n %s\n", + req->version, 31 + strlen(err_str), err_str); + break; -#define ensure(x) \ - do { if (x < 0) goto out; } while(0) + default: + break; + } - data_sent = 0; + close(wfd[0]); + close(rfd[1]); + exit(0); - timeout.tv_sec = cl->server->conf->script_timeout; - timeout.tv_usec = 0; + break; - /* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */ - while (1) - { - FD_ZERO(&reader); - FD_ZERO(&writer); + /* parent; handle I/O relaying */ + default: + memset(state, 0, sizeof(*state)); - FD_SET(rfd[0], &reader); - FD_SET(wfd[1], &writer); + state->cl = cl; + state->cl->proc.pid = child; - /* wait until we can read or write or both */ - if (select_intr(fd_max, &reader, - (content_length > -1) ? &writer : NULL, - NULL, - (data_sent < 1) ? &timeout : NULL) > 0) - { - /* ready to write to Lua child */ - if (FD_ISSET(wfd[1], &writer)) - { - /* there is unread post data waiting */ - if (content_length > 0) - { - /* read it from socket ... */ - if ((buflen = uh_tcp_recv(cl, buf, min(content_length, sizeof(buf)))) > 0) - { - /* ... and write it to child's stdin */ - if (write(wfd[1], buf, buflen) < 0) - perror("write()"); - - content_length -= buflen; - } - - /* unexpected eof! */ - else - { - if (write(wfd[1], "", 0) < 0) - perror("write()"); - - content_length = 0; - } - } - - /* there is no more post data, close pipe to child's stdin */ - else if (content_length > -1) - { - close(wfd[1]); - content_length = -1; - } - } + /* close unneeded pipe ends */ + close(rfd[1]); + close(wfd[0]); - /* ready to read from Lua child */ - if (FD_ISSET(rfd[0], &reader)) - { - /* read data from child ... */ - if ((buflen = read(rfd[0], buf, sizeof(buf))) > 0) - { - /* pass through buffer to socket */ - ensure(uh_tcp_send(cl, buf, buflen)); - data_sent = 1; - } - - /* looks like eof from child */ - else - { - /* error? */ - if (!data_sent) - uh_http_sendhf(cl, 500, "Internal Server Error", - "The Lua child did not produce any response"); - - break; - } - } - } + D("Lua: Child(%d) created: rfd(%d) wfd(%d)\n", child, rfd[0], wfd[1]); - /* timeout exceeded or interrupted by SIGCHLD */ - else - { - if ((errno != EINTR) && ! data_sent) - { - ensure(uh_http_sendhf(cl, 504, "Gateway Timeout", - "The Lua script took too long to produce " - "a response")); - } + state->content_length = cl->httpbuf.len; + /* find content length */ + if (req->method == UH_HTTP_MSG_POST) + { + foreach_header(i, req->headers) + { + if (!strcasecmp(req->headers[i], "Content-Length")) + { + state->content_length = atoi(req->headers[i+1]); break; } } + } - out: - close(rfd[0]); - close(wfd[1]); + state->rfd = rfd[0]; + fd_nonblock(state->rfd); - if (!kill(child, 0)) - { - kill(child, SIGTERM); - waitpid(child, NULL, 0); - } + state->wfd = wfd[1]; + fd_nonblock(state->wfd); - break; + cl->cb = uh_lua_socket_cb; + cl->priv = state; + + break; } + + return true; } void uh_lua_close(lua_State *L) diff --git a/package/uhttpd/src/uhttpd-lua.h b/package/uhttpd/src/uhttpd-lua.h index 2d2f73c1c..9a10933fc 100644 --- a/package/uhttpd/src/uhttpd-lua.h +++ b/package/uhttpd/src/uhttpd-lua.h @@ -1,7 +1,7 @@ /* * uhttpd - Tiny single-threaded httpd - Lua header * - * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org> + * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -32,12 +32,17 @@ #define UH_LUA_ERR_PARAM -3 -lua_State * uh_lua_init(const struct config *conf); - -void uh_lua_request( - struct client *cl, struct http_request *req, lua_State *L -); +struct uh_lua_state { + int rfd; + int wfd; + struct client *cl; + char httpbuf[UH_LIMIT_MSGHEAD]; + int content_length; + bool data_sent; +}; +lua_State * uh_lua_init(const struct config *conf); +bool uh_lua_request(struct client *cl, lua_State *L); void uh_lua_close(lua_State *L); #endif diff --git a/package/uhttpd/src/uhttpd-tls.c b/package/uhttpd/src/uhttpd-tls.c index 4a9e90792..9c6eb81db 100644 --- a/package/uhttpd/src/uhttpd-tls.c +++ b/package/uhttpd/src/uhttpd-tls.c @@ -23,150 +23,19 @@ #include <syslog.h> #define dbg(...) syslog(LOG_INFO, __VA_ARGS__) -#ifdef TLS_IS_CYASSL -static int uh_cyassl_recv_cb(char *buf, int sz, void *ctx) -{ - int rv; - int socket = *(int *)ctx; - struct client *cl; - - if (!(cl = uh_client_lookup(socket))) - return -1; /* unexpected error */ - - rv = uh_tcp_recv_lowlevel(cl, buf, sz); - - if (rv < 0) - return -4; /* interrupted */ - - if (rv == 0) - return -5; /* connection closed */ - - return rv; -} - -static int uh_cyassl_send_cb(char *buf, int sz, void *ctx) -{ - int rv; - int socket = *(int *)ctx; - struct client *cl; - - if (!(cl = uh_client_lookup(socket))) - return -1; /* unexpected error */ - - rv = uh_tcp_send_lowlevel(cl, buf, sz); - - if (rv <= 0) - return -5; /* connection dead */ - - return rv; -} - -void SetCallbackIORecv_Ctx(SSL_CTX*, int (*)(char *, int, void *)); -void SetCallbackIOSend_Ctx(SSL_CTX*, int (*)(char *, int, void *)); - -static void uh_tls_ctx_setup(SSL_CTX *ctx) -{ - SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL); - SetCallbackIORecv_Ctx(ctx, uh_cyassl_recv_cb); - SetCallbackIOSend_Ctx(ctx, uh_cyassl_send_cb); - return; -} - -static int uh_tls_client_ctx_setup(SSL *ssl, int socket) -{ - return SSL_set_fd(ssl, socket); -} -#endif /* TLS_IS_CYASSL */ - -#ifdef TLS_IS_OPENSSL -static long uh_openssl_bio_ctrl_cb(BIO *b, int cmd, long num, void *ptr) -{ - long rv = 1; - - switch (cmd) - { - case BIO_C_SET_FD: - b->num = *((int *)ptr); - b->shutdown = (int)num; - b->init = 1; - break; - - case BIO_C_GET_FD: - if (!b->init) - return -1; - - if (ptr) - *((int *)ptr) = b->num; - - rv = b->num; - break; - } - - return rv; -} - -static int uh_openssl_bio_read_cb(BIO *b, char *out, int outl) -{ - int rv = 0; - struct client *cl; - - if (!(cl = uh_client_lookup(b->num))) - return -1; - - if (out != NULL) - rv = uh_tcp_recv_lowlevel(cl, out, outl); - - return rv; -} - -static int uh_openssl_bio_write_cb(BIO *b, const char *in, int inl) -{ - struct client *cl; - - if (!(cl = uh_client_lookup(b->num))) - return -1; - - return uh_tcp_send_lowlevel(cl, in, inl); -} - -static BIO_METHOD uh_openssl_bio_methods = { - .type = BIO_TYPE_SOCKET, - .name = "uhsocket", - .ctrl = uh_openssl_bio_ctrl_cb, - .bwrite = uh_openssl_bio_write_cb, - .bread = uh_openssl_bio_read_cb -}; - -static void uh_tls_ctx_setup(SSL_CTX *ctx) -{ - SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL); - return; -} - -static int uh_tls_client_ctx_setup(SSL *ssl, int socket) -{ - BIO *b; - - if (!(b = BIO_new(&uh_openssl_bio_methods))) - return 0; - - BIO_set_fd(b, socket, BIO_NOCLOSE); - SSL_set_bio(ssl, b, b); - - return 1; -} -#endif /* TLS_IS_OPENSSL */ - - -SSL_CTX * uh_tls_ctx_init() +SSL_CTX * uh_tls_ctx_init(void) { SSL_CTX *c; SSL_load_error_strings(); SSL_library_init(); +#if TLS_IS_OPENSSL + if ((c = SSL_CTX_new(SSLv23_server_method())) != NULL) +#else if ((c = SSL_CTX_new(TLSv1_server_method())) != NULL) - uh_tls_ctx_setup(c); +#endif + SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL); return c; } @@ -199,53 +68,100 @@ void uh_tls_ctx_free(struct listener *l) int uh_tls_client_accept(struct client *c) { - int rv; + int rv, err; + int fd = c->fd.fd; - if( c->server && c->server->tls ) + if (!c->server || !c->server->tls) { - c->tls = SSL_new(c->server->tls); - if( c->tls ) - { - if( (rv = uh_tls_client_ctx_setup(c->tls, c->socket)) < 1 ) - goto cleanup; + c->tls = NULL; + return 1; + } - if( (rv = SSL_accept(c->tls)) < 1 ) - goto cleanup; + if ((c->tls = SSL_new(c->server->tls))) + { + if ((rv = SSL_set_fd(c->tls, fd)) < 1) + { + SSL_free(c->tls); + c->tls = NULL; } else - rv = 0; - } - else - { - c->tls = NULL; - rv = 1; - } + { + while (true) + { + rv = SSL_accept(c->tls); + err = SSL_get_error(c->tls, rv); + + if ((rv != 1) && + (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE)) + { + if (uh_socket_wait(fd, c->server->conf->network_timeout, + (err == SSL_ERROR_WANT_WRITE))) + { + D("TLS: accept(%d) = retry\n", fd); + continue; + } + + D("TLS: accept(%d) = timeout\n", fd); + } + else if (rv == 1) + { + D("TLS: accept(%d) = %p\n", fd, c->tls); + return 1; + } -done: - return rv; +#ifdef TLS_IS_OPENSSL + D("TLS: accept(%d) = failed: %s\n", + fd, ERR_error_string(ERR_get_error(), NULL)); +#endif + + SSL_free(c->tls); + c->tls = NULL; + break; + } + } + } -cleanup: - SSL_free(c->tls); - c->tls = NULL; - goto done; + return 0; } -int uh_tls_client_recv(struct client *c, void *buf, int len) +int uh_tls_client_recv(struct client *c, char *buf, int len) { int rv = SSL_read(c->tls, buf, len); - return (rv > 0) ? rv : -1; + int err = SSL_get_error(c->tls, 0); + + if ((rv == -1) && (err == SSL_ERROR_WANT_READ)) + { + D("TLS: recv(%d, %d) = retry\n", c->fd.fd, len); + errno = EAGAIN; + return -1; + } + + D("TLS: recv(%d, %d) = %d\n", c->fd.fd, len, rv); + return rv; } -int uh_tls_client_send(struct client *c, void *buf, int len) +int uh_tls_client_send(struct client *c, const char *buf, int len) { int rv = SSL_write(c->tls, buf, len); - return (rv > 0) ? rv : -1; + int err = SSL_get_error(c->tls, 0); + + if ((rv == -1) && (err == SSL_ERROR_WANT_WRITE)) + { + D("TLS: send(%d, %d) = retry\n", c->fd.fd, len); + errno = EAGAIN; + return -1; + } + + D("TLS: send(%d, %d) = %d\n", c->fd.fd, len, rv); + return rv; } void uh_tls_client_close(struct client *c) { - if( c->tls ) + if (c->tls) { + D("TLS: close(%d)\n", c->fd.fd); + SSL_shutdown(c->tls); SSL_free(c->tls); diff --git a/package/uhttpd/src/uhttpd-tls.h b/package/uhttpd/src/uhttpd-tls.h index 24dfb4407..8644c2ac5 100644 --- a/package/uhttpd/src/uhttpd-tls.h +++ b/package/uhttpd/src/uhttpd-tls.h @@ -19,7 +19,9 @@ #ifndef _UHTTPD_TLS_ #include <openssl/ssl.h> - +#ifdef TLS_IS_OPENSSL +#include <openssl/err.h> +#endif SSL_CTX * uh_tls_ctx_init(); int uh_tls_ctx_cert(SSL_CTX *c, const char *file); @@ -27,8 +29,8 @@ int uh_tls_ctx_key(SSL_CTX *c, const char *file); void uh_tls_ctx_free(struct listener *l); int uh_tls_client_accept(struct client *c); -int uh_tls_client_recv(struct client *c, void *buf, int len); -int uh_tls_client_send(struct client *c, void *buf, int len); +int uh_tls_client_recv(struct client *c, char *buf, int len); +int uh_tls_client_send(struct client *c, const char *buf, int len); void uh_tls_client_close(struct client *c); #endif diff --git a/package/uhttpd/src/uhttpd-ubus.c b/package/uhttpd/src/uhttpd-ubus.c new file mode 100644 index 000000000..20781629b --- /dev/null +++ b/package/uhttpd/src/uhttpd-ubus.c @@ -0,0 +1,957 @@ +/* + * uhttpd - Tiny single-threaded httpd - ubus handler + * + * Copyright (C) 2012 Jo-Philipp Wich <xm@subsignal.org> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "uhttpd.h" +#include "uhttpd-utils.h" +#include "uhttpd-ubus.h" + + +enum { + UH_UBUS_SN_TIMEOUT, + __UH_UBUS_SN_MAX, +}; + +static const struct blobmsg_policy new_policy[__UH_UBUS_SN_MAX] = { + [UH_UBUS_SN_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 }, +}; + + +enum { + UH_UBUS_SI_SID, + __UH_UBUS_SI_MAX, +}; + +static const struct blobmsg_policy sid_policy[__UH_UBUS_SI_MAX] = { + [UH_UBUS_SI_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING }, +}; + + +enum { + UH_UBUS_SS_SID, + UH_UBUS_SS_VALUES, + __UH_UBUS_SS_MAX, +}; + +static const struct blobmsg_policy set_policy[__UH_UBUS_SS_MAX] = { + [UH_UBUS_SS_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING }, + [UH_UBUS_SS_VALUES] = { .name = "values", .type = BLOBMSG_TYPE_TABLE }, +}; + + +enum { + UH_UBUS_SG_SID, + UH_UBUS_SG_KEYS, + __UH_UBUS_SG_MAX, +}; + +static const struct blobmsg_policy get_policy[__UH_UBUS_SG_MAX] = { + [UH_UBUS_SG_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING }, + [UH_UBUS_SG_KEYS] = { .name = "keys", .type = BLOBMSG_TYPE_ARRAY }, +}; + + +enum { + UH_UBUS_SA_SID, + UH_UBUS_SA_OBJECTS, + __UH_UBUS_SA_MAX, +}; + +static const struct blobmsg_policy acl_policy[__UH_UBUS_SA_MAX] = { + [UH_UBUS_SA_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING }, + [UH_UBUS_SA_OBJECTS] = { .name = "objects", .type = BLOBMSG_TYPE_ARRAY }, +}; + + +static bool +uh_ubus_strmatch(const char *str, const char *pat) +{ + while (*pat) + { + if (*pat == '?') + { + if (!*str) + return false; + + str++; + pat++; + } + else if (*pat == '*') + { + if (uh_ubus_strmatch(str, pat+1)) + return true; + + if (*str && uh_ubus_strmatch(str+1, pat)) + return true; + + return false; + } + else if (*str++ != *pat++) + { + return false; + } + } + + return (!*str && !*pat); +} + +static int +uh_ubus_avlcmp(const void *k1, const void *k2, void *ptr) +{ + return strcmp((char *)k1, (char *)k2); +} + +static void +uh_ubus_random(char *dest) +{ + int i; + unsigned char buf[16] = { 0 }; + FILE *f; + + if ((f = fopen("/dev/urandom", "r")) != NULL) + { + fread(buf, 1, sizeof(buf), f); + fclose(f); + } + + for (i = 0; i < sizeof(buf); i++) + sprintf(dest + (i<<1), "%02x", buf[i]); +} + +static void +uh_ubus_session_dump_data(struct uh_ubus_session *ses, struct blob_buf *b) +{ + struct uh_ubus_session_data *d; + + avl_for_each_element(&ses->data, d, avl) + { + blobmsg_add_field(b, blobmsg_type(d->attr), blobmsg_name(d->attr), + blobmsg_data(d->attr), blobmsg_data_len(d->attr)); + } +} + +static void +uh_ubus_session_dump_acls(struct uh_ubus_session *ses, struct blob_buf *b) +{ + struct uh_ubus_session_acl *acl; + const char *lastobj = NULL; + void *c = NULL; + + avl_for_each_element(&ses->acls, acl, avl) + { + if (!lastobj || strcmp(acl->object, lastobj)) + { + if (c) blobmsg_close_array(b, c); + c = blobmsg_open_array(b, acl->object); + } + + blobmsg_add_string(b, NULL, acl->function); + lastobj = acl->object; + } + + if (c) blobmsg_close_array(b, c); +} + +static void +uh_ubus_session_dump(struct uh_ubus_session *ses, + struct ubus_context *ctx, + struct ubus_request_data *req) +{ + void *c; + struct blob_buf b; + + memset(&b, 0, sizeof(b)); + blob_buf_init(&b, 0); + + blobmsg_add_string(&b, "sid", ses->id); + blobmsg_add_u32(&b, "timeout", ses->timeout); + blobmsg_add_u32(&b, "touched", ses->touched.tv_sec); + + c = blobmsg_open_table(&b, "acls"); + uh_ubus_session_dump_acls(ses, &b); + blobmsg_close_table(&b, c); + + c = blobmsg_open_table(&b, "data"); + uh_ubus_session_dump_data(ses, &b); + blobmsg_close_table(&b, c); + + ubus_send_reply(ctx, req, b.head); + blob_buf_free(&b); +} + +static struct uh_ubus_session * +uh_ubus_session_create(struct uh_ubus_state *state, int timeout) +{ + struct uh_ubus_session *ses; + + ses = malloc(sizeof(*ses)); + + /* failed to allocate memory... */ + if (!ses) + return NULL; + + memset(ses, 0, sizeof(*ses)); + + uh_ubus_random(ses->id); + + ses->timeout = timeout; + ses->avl.key = ses->id; + + avl_insert(&state->sessions, &ses->avl); + avl_init(&ses->acls, uh_ubus_avlcmp, true, NULL); + avl_init(&ses->data, uh_ubus_avlcmp, false, NULL); + clock_gettime(CLOCK_MONOTONIC, &ses->touched); + + return ses; +} + + +static struct uh_ubus_session * +uh_ubus_session_get(struct uh_ubus_state *state, const char *id) +{ + struct uh_ubus_session *ses; + + ses = avl_find_element(&state->sessions, id, ses, avl); + + if (ses) + clock_gettime(CLOCK_MONOTONIC, &ses->touched); + + return ses; +} + +static void +uh_ubus_session_destroy(struct uh_ubus_state *state, + struct uh_ubus_session *ses) +{ + struct uh_ubus_session_acl *acl, *nacl; + struct uh_ubus_session_data *data, *ndata; + + avl_remove_all_elements(&ses->acls, acl, avl, nacl) + free(acl); + + avl_remove_all_elements(&ses->data, data, avl, ndata) + free(data); + + avl_delete(&state->sessions, &ses->avl); + free(ses); +} + +static void +uh_ubus_session_cleanup(struct uh_ubus_state *state) +{ + struct timespec now; + struct uh_ubus_session *ses, *nses; + + clock_gettime(CLOCK_MONOTONIC, &now); + + avl_for_each_element_safe(&state->sessions, ses, avl, nses) + { + if ((now.tv_sec - ses->touched.tv_sec) >= ses->timeout) + uh_ubus_session_destroy(state, ses); + } +} + + +static int +uh_ubus_handle_create(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct blob_attr *tb[__UH_UBUS_SN_MAX]; + + int timeout = state->timeout; + + blobmsg_parse(new_policy, __UH_UBUS_SN_MAX, tb, blob_data(msg), blob_len(msg)); + + /* TODO: make this a uloop timeout */ + uh_ubus_session_cleanup(state); + + if (tb[UH_UBUS_SN_TIMEOUT]) + timeout = *(uint32_t *)blobmsg_data(tb[UH_UBUS_SN_TIMEOUT]); + + ses = uh_ubus_session_create(state, timeout); + + if (ses) + uh_ubus_session_dump(ses, ctx, req); + + return 0; +} + +static int +uh_ubus_handle_list(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct blob_attr *tb[__UH_UBUS_SI_MAX]; + + blobmsg_parse(sid_policy, __UH_UBUS_SI_MAX, tb, blob_data(msg), blob_len(msg)); + + /* TODO: make this a uloop timeout */ + uh_ubus_session_cleanup(state); + + if (!tb[UH_UBUS_SI_SID]) + { + avl_for_each_element(&state->sessions, ses, avl) + uh_ubus_session_dump(ses, ctx, req); + } + else + { + ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SI_SID])); + + if (!ses) + return UBUS_STATUS_NOT_FOUND; + + uh_ubus_session_dump(ses, ctx, req); + } + + return 0; +} + + +static int +uh_ubus_session_grant(struct uh_ubus_session *ses, struct ubus_context *ctx, + const char *object, const char *function) +{ + struct uh_ubus_session_acl *acl, *nacl; + + acl = avl_find_element(&ses->acls, object, acl, avl); + + if (acl) + { + avl_for_element_to_last(&ses->acls, acl, acl, avl) + { + if (!strcmp(acl->function, function)) + return 1; + } + } + + nacl = malloc(sizeof(*nacl) + strlen(object) + strlen(function) + 2); + + if (nacl) + { + memset(nacl, 0, sizeof(*nacl)); + nacl->function = nacl->object + 1; + nacl->function += sprintf(nacl->object, "%s", object); + sprintf(nacl->function, "%s", function); + + nacl->avl.key = nacl->object; + avl_insert(&ses->acls, &nacl->avl); + } + + return 0; +} + +static int +uh_ubus_session_revoke(struct uh_ubus_session *ses, struct ubus_context *ctx, + const char *object, const char *function) +{ + struct uh_ubus_session_acl *acl, *nacl; + + if (!object && !function) + { + avl_remove_all_elements(&ses->acls, acl, avl, nacl) + free(acl); + } + else + { + avl_for_each_element_safe(&ses->acls, acl, avl, nacl) + { + if (uh_ubus_strmatch(acl->object, object) && + uh_ubus_strmatch(acl->function, function)) + { + avl_delete(&ses->acls, &acl->avl); + free(acl); + } + } + } + + return 0; +} + + +static int +uh_ubus_handle_grant(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct blob_attr *tb[__UH_UBUS_SA_MAX]; + struct blob_attr *attr, *sattr; + const char *object, *function; + int rem1, rem2; + + blobmsg_parse(acl_policy, __UH_UBUS_SA_MAX, tb, blob_data(msg), blob_len(msg)); + + if (!tb[UH_UBUS_SA_SID] || !tb[UH_UBUS_SA_OBJECTS]) + return UBUS_STATUS_INVALID_ARGUMENT; + + ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SA_SID])); + + if (!ses) + return UBUS_STATUS_NOT_FOUND; + + blobmsg_for_each_attr(attr, tb[UH_UBUS_SA_OBJECTS], rem1) + { + if (blob_id(attr) != BLOBMSG_TYPE_ARRAY) + continue; + + object = NULL; + function = NULL; + + blobmsg_for_each_attr(sattr, attr, rem2) + { + if (blob_id(sattr) != BLOBMSG_TYPE_STRING) + continue; + + if (!object) + object = blobmsg_data(sattr); + else if (!function) + function = blobmsg_data(sattr); + else + break; + } + + if (object && function) + uh_ubus_session_grant(ses, ctx, object, function); + } + + return 0; +} + +static int +uh_ubus_handle_revoke(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct blob_attr *tb[__UH_UBUS_SA_MAX]; + struct blob_attr *attr, *sattr; + const char *object, *function; + int rem1, rem2; + + blobmsg_parse(acl_policy, __UH_UBUS_SA_MAX, tb, blob_data(msg), blob_len(msg)); + + if (!tb[UH_UBUS_SA_SID]) + return UBUS_STATUS_INVALID_ARGUMENT; + + ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SA_SID])); + + if (!ses) + return UBUS_STATUS_NOT_FOUND; + + if (!tb[UH_UBUS_SA_OBJECTS]) + { + uh_ubus_session_revoke(ses, ctx, NULL, NULL); + } + else + { + blobmsg_for_each_attr(attr, tb[UH_UBUS_SA_OBJECTS], rem1) + { + if (blob_id(attr) != BLOBMSG_TYPE_ARRAY) + continue; + + object = NULL; + function = NULL; + + blobmsg_for_each_attr(sattr, attr, rem2) + { + if (blob_id(sattr) != BLOBMSG_TYPE_STRING) + continue; + + if (!object) + object = blobmsg_data(sattr); + else if (!function) + function = blobmsg_data(sattr); + else + break; + } + + if (object && function) + uh_ubus_session_revoke(ses, ctx, object, function); + } + } + + return 0; +} + +static int +uh_ubus_handle_set(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct uh_ubus_session_data *data; + struct blob_attr *tb[__UH_UBUS_SA_MAX]; + struct blob_attr *attr; + int rem; + + blobmsg_parse(set_policy, __UH_UBUS_SS_MAX, tb, blob_data(msg), blob_len(msg)); + + if (!tb[UH_UBUS_SS_SID] || !tb[UH_UBUS_SS_VALUES]) + return UBUS_STATUS_INVALID_ARGUMENT; + + ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SS_SID])); + + if (!ses) + return UBUS_STATUS_NOT_FOUND; + + blobmsg_for_each_attr(attr, tb[UH_UBUS_SS_VALUES], rem) + { + if (!blobmsg_name(attr)[0]) + continue; + + data = avl_find_element(&ses->data, blobmsg_name(attr), data, avl); + + if (data) + { + avl_delete(&ses->data, &data->avl); + free(data); + } + + data = malloc(sizeof(*data) + blob_pad_len(attr)); + + if (!data) + break; + + memset(data, 0, sizeof(*data) + blob_pad_len(attr)); + memcpy(data->attr, attr, blob_pad_len(attr)); + + data->avl.key = blobmsg_name(data->attr); + avl_insert(&ses->data, &data->avl); + } + + return 0; +} + +static int +uh_ubus_handle_get(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct uh_ubus_session_data *data; + struct blob_attr *tb[__UH_UBUS_SA_MAX]; + struct blob_attr *attr; + struct blob_buf b; + void *c; + int rem; + + blobmsg_parse(get_policy, __UH_UBUS_SG_MAX, tb, blob_data(msg), blob_len(msg)); + + if (!tb[UH_UBUS_SG_SID]) + return UBUS_STATUS_INVALID_ARGUMENT; + + ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SG_SID])); + + if (!ses) + return UBUS_STATUS_NOT_FOUND; + + memset(&b, 0, sizeof(b)); + blob_buf_init(&b, 0); + c = blobmsg_open_table(&b, "values"); + + if (!tb[UH_UBUS_SG_KEYS]) + { + uh_ubus_session_dump_data(ses, &b); + } + else + { + blobmsg_for_each_attr(attr, tb[UH_UBUS_SG_KEYS], rem) + { + if (blob_id(attr) != BLOBMSG_TYPE_STRING) + continue; + + data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl); + + if (!data) + continue; + + blobmsg_add_field(&b, blobmsg_type(data->attr), + blobmsg_name(data->attr), + blobmsg_data(data->attr), + blobmsg_data_len(data->attr)); + } + } + + blobmsg_close_table(&b, c); + ubus_send_reply(ctx, req, b.head); + blob_buf_free(&b); + + return 0; +} + +static int +uh_ubus_handle_unset(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct uh_ubus_session_data *data, *ndata; + struct blob_attr *tb[__UH_UBUS_SA_MAX]; + struct blob_attr *attr; + int rem; + + blobmsg_parse(get_policy, __UH_UBUS_SG_MAX, tb, blob_data(msg), blob_len(msg)); + + if (!tb[UH_UBUS_SG_SID]) + return UBUS_STATUS_INVALID_ARGUMENT; + + ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SG_SID])); + + if (!ses) + return UBUS_STATUS_NOT_FOUND; + + if (!tb[UH_UBUS_SG_KEYS]) + { + avl_remove_all_elements(&ses->data, data, avl, ndata) + free(data); + } + else + { + blobmsg_for_each_attr(attr, tb[UH_UBUS_SG_KEYS], rem) + { + if (blob_id(attr) != BLOBMSG_TYPE_STRING) + continue; + + data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl); + + if (!data) + continue; + + avl_delete(&ses->data, &data->avl); + free(data); + } + } + + return 0; +} + +static int +uh_ubus_handle_destroy(struct ubus_context *ctx, struct ubus_object *obj, + struct ubus_request_data *req, const char *method, + struct blob_attr *msg) +{ + struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus); + struct uh_ubus_session *ses; + struct blob_attr *tb[__UH_UBUS_SA_MAX]; + + blobmsg_parse(sid_policy, __UH_UBUS_SI_MAX, tb, blob_data(msg), blob_len(msg)); + + if (!tb[UH_UBUS_SI_SID]) + return UBUS_STATUS_INVALID_ARGUMENT; + + ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SI_SID])); + + if (!ses) + return UBUS_STATUS_NOT_FOUND; + + uh_ubus_session_destroy(state, ses); + + return 0; +} + + +struct uh_ubus_state * +uh_ubus_init(const struct config *conf) +{ + int rv; + struct uh_ubus_state *state; + struct ubus_object *session_object; + + static struct ubus_method session_methods[] = { + UBUS_METHOD("create", uh_ubus_handle_create, new_policy), + UBUS_METHOD("list", uh_ubus_handle_list, sid_policy), + UBUS_METHOD("grant", uh_ubus_handle_grant, acl_policy), + UBUS_METHOD("revoke", uh_ubus_handle_revoke, acl_policy), + UBUS_METHOD("set", uh_ubus_handle_set, set_policy), + UBUS_METHOD("get", uh_ubus_handle_get, get_policy), + UBUS_METHOD("unset", uh_ubus_handle_unset, get_policy), + UBUS_METHOD("destroy", uh_ubus_handle_destroy, sid_policy), + }; + + static struct ubus_object_type session_type = + UBUS_OBJECT_TYPE("uhttpd", session_methods); + + state = malloc(sizeof(*state)); + + if (!state) + { + fprintf(stderr, "Unable to allocate memory for ubus state\n"); + exit(1); + } + + memset(state, 0, sizeof(*state)); + state->ctx = ubus_connect(conf->ubus_socket); + state->timeout = conf->script_timeout; + + if (!state->ctx) + { + fprintf(stderr, "Unable to connect to ubus socket\n"); + exit(1); + } + + ubus_add_uloop(state->ctx); + + session_object = &state->ubus; + session_object->name = "session"; + session_object->type = &session_type; + session_object->methods = session_methods; + session_object->n_methods = ARRAY_SIZE(session_methods); + + rv = ubus_add_object(state->ctx, &state->ubus); + + if (rv) + { + fprintf(stderr, "Unable to publish ubus object: %s\n", + ubus_strerror(rv)); + exit(1); + } + + blob_buf_init(&state->buf, 0); + avl_init(&state->sessions, uh_ubus_avlcmp, false, NULL); + + return state; +} + + +static bool +uh_ubus_request_parse_url(struct client *cl, char **sid, char **obj, char **fun) +{ + char *url = cl->request.url + strlen(cl->server->conf->ubus_prefix); + + for (; url && *url == '/'; *url++ = 0); + *sid = url; + + for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0); + *obj = url; + + for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0); + *fun = url; + + for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0); + return (*sid && *obj && *fun); +} + +static bool +uh_ubus_request_parse_post(struct client *cl, int len, struct blob_buf *b) +{ + int rlen; + bool rv = false; + char buf[UH_LIMIT_MSGHEAD]; + + struct json_object *obj = NULL; + struct json_tokener *tok = NULL; + + if (!len) + return NULL; + + memset(b, 0, sizeof(*b)); + blob_buf_init(b, 0); + + tok = json_tokener_new(); + + while (len > 0) + { + /* remaining data in http head buffer ... */ + if (cl->httpbuf.len > 0) + { + rlen = min(len, cl->httpbuf.len); + + D("ubus: feed %d HTTP buffer bytes\n", rlen); + + memcpy(buf, cl->httpbuf.ptr, rlen); + + cl->httpbuf.len -= rlen; + cl->httpbuf.ptr += rlen; + } + + /* read it from socket ... */ + else + { + ensure_out(rlen = uh_tcp_recv(cl, buf, min(len, sizeof(buf)))); + + if ((rlen < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK))) + break; + + D("ubus: feed %d/%d TCP socket bytes\n", + rlen, min(len, sizeof(buf))); + } + + obj = json_tokener_parse_ex(tok, buf, rlen); + len -= rlen; + + if (tok->err != json_tokener_continue && !is_error(obj)) + break; + } + +out: + if (!is_error(obj)) + { + if (json_object_get_type(obj) == json_type_object) + { + rv = true; + json_object_object_foreach(obj, key, val) + { + if (!blobmsg_add_json_element(b, key, val)) + { + rv = false; + break; + } + } + } + + json_object_put(obj); + } + + json_tokener_free(tok); + + if (!rv) + blob_buf_free(b); + + return rv; +} + +static void +uh_ubus_request_cb(struct ubus_request *req, int type, struct blob_attr *msg) +{ + int len; + char *str; + struct client *cl = (struct client *)req->priv; + + if (!msg) + { + uh_http_sendhf(cl, 204, "No content", "Function did not return data\n"); + return; + } + + str = blobmsg_format_json_indent(msg, true, 0); + len = strlen(str); + + ensure_out(uh_http_sendf(cl, NULL, "HTTP/1.0 200 OK\r\n")); + ensure_out(uh_http_sendf(cl, NULL, "Content-Type: application/json\r\n")); + ensure_out(uh_http_sendf(cl, NULL, "Content-Length: %i\r\n\r\n", len)); + ensure_out(uh_http_send(cl, NULL, str, len)); + +out: + free(str); +} + +bool +uh_ubus_request(struct client *cl, struct uh_ubus_state *state) +{ + int i, len = 0; + bool access = false; + char *sid, *obj, *fun; + + struct blob_buf buf; + struct uh_ubus_session *ses; + struct uh_ubus_session_acl *acl; + + uint32_t obj_id; + + + memset(&buf, 0, sizeof(buf)); + blob_buf_init(&buf, 0); + + if (!uh_ubus_request_parse_url(cl, &sid, &obj, &fun)) + { + uh_http_sendhf(cl, 400, "Bad Request", "Invalid Request\n"); + goto out; + } + + if (!(ses = uh_ubus_session_get(state, sid))) + { + uh_http_sendhf(cl, 404, "Not Found", "No such session\n"); + goto out; + } + + avl_for_each_element(&ses->acls, acl, avl) + { + if (uh_ubus_strmatch(obj, acl->object) && + uh_ubus_strmatch(fun, acl->function)) + { + access = true; + break; + } + } + + if (!access) + { + uh_http_sendhf(cl, 403, "Denied", "Access to object denied\n"); + goto out; + } + + /* find content length */ + if (cl->request.method == UH_HTTP_MSG_POST) + { + foreach_header(i, cl->request.headers) + { + if (!strcasecmp(cl->request.headers[i], "Content-Length")) + { + len = atoi(cl->request.headers[i+1]); + break; + } + } + } + + if (len > UH_UBUS_MAX_POST_SIZE) + { + uh_http_sendhf(cl, 413, "Too Large", "Message too big\n"); + goto out; + } + + if (len && !uh_ubus_request_parse_post(cl, len, &buf)) + { + uh_http_sendhf(cl, 400, "Bad Request", "Invalid JSON data\n"); + goto out; + } + + if (ubus_lookup_id(state->ctx, obj, &obj_id)) + { + uh_http_sendhf(cl, 500, "Internal Error", "Unable to lookup object\n"); + goto out; + } + + if (ubus_invoke(state->ctx, obj_id, fun, buf.head, + uh_ubus_request_cb, cl, state->timeout * 1000)) + { + uh_http_sendhf(cl, 500, "Internal Error", "Unable to invoke function\n"); + goto out; + } + +out: + blob_buf_free(&buf); + return false; +} + +void +uh_ubus_close(struct uh_ubus_state *state) +{ + if (state->ctx) + ubus_free(state->ctx); + + free(state); +} diff --git a/package/uhttpd/src/uhttpd-ubus.h b/package/uhttpd/src/uhttpd-ubus.h new file mode 100644 index 000000000..777ce27fd --- /dev/null +++ b/package/uhttpd/src/uhttpd-ubus.h @@ -0,0 +1,70 @@ +/* + * uhttpd - Tiny single-threaded httpd - ubus header + * + * Copyright (C) 2012 Jo-Philipp Wich <xm@subsignal.org> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef _UHTTPD_UBUS_ + +#include <time.h> + +#include <libubus.h> +#include <libubox/avl.h> +#include <libubox/blobmsg_json.h> +#include <json/json.h> + + +#define UH_UBUS_MAX_POST_SIZE 4096 + + +struct uh_ubus_state { + struct ubus_context *ctx; + struct ubus_object ubus; + struct blob_buf buf; + struct avl_tree sessions; + int timeout; +}; + +struct uh_ubus_request_data { + const char *sid; + const char *object; + const char *function; +}; + +struct uh_ubus_session { + char id[33]; + int timeout; + struct avl_node avl; + struct avl_tree data; + struct avl_tree acls; + struct timespec touched; +}; + +struct uh_ubus_session_data { + struct avl_node avl; + struct blob_attr attr[]; +}; + +struct uh_ubus_session_acl { + struct avl_node avl; + char *function; + char object[]; +}; + +struct uh_ubus_state * uh_ubus_init(const struct config *conf); +bool uh_ubus_request(struct client *cl, struct uh_ubus_state *state); +void uh_ubus_close(struct uh_ubus_state *state); + +#endif diff --git a/package/uhttpd/src/uhttpd-utils.c b/package/uhttpd/src/uhttpd-utils.c index 18969e74d..dec952357 100644 --- a/package/uhttpd/src/uhttpd-utils.c +++ b/package/uhttpd/src/uhttpd-utils.c @@ -1,7 +1,7 @@ /* * uhttpd - Tiny single-threaded httpd - Utility functions * - * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org> + * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -103,120 +103,171 @@ char *strfind(char *haystack, int hslen, const char *needle, int ndlen) return NULL; } -/* interruptable select() */ -int select_intr(int n, fd_set *r, fd_set *w, fd_set *e, struct timeval *t) +bool uh_socket_wait(int fd, int sec, bool write) { int rv; - sigset_t ssn, sso; + struct timeval timeout; - /* unblock SIGCHLD */ - sigemptyset(&ssn); - sigaddset(&ssn, SIGCHLD); - sigaddset(&ssn, SIGPIPE); - sigprocmask(SIG_UNBLOCK, &ssn, &sso); + fd_set fds; - rv = select(n, r, w, e, t); + FD_ZERO(&fds); + FD_SET(fd, &fds); - /* restore signal mask */ - sigprocmask(SIG_SETMASK, &sso, NULL); + timeout.tv_sec = sec; + timeout.tv_usec = 0; - return rv; -} + while (((rv = select(fd+1, write ? NULL : &fds, write ? &fds : NULL, + NULL, &timeout)) < 0) && (errno == EINTR)) + { + D("IO: Socket(%d) select interrupted: %s\n", + fd, strerror(errno)); + continue; + } -int uh_tcp_send_lowlevel(struct client *cl, const char *buf, int len) -{ - fd_set writer; - struct timeval timeout; + if (rv <= 0) + { + D("IO: Socket(%d) appears dead (rv=%d)\n", fd, rv); + return false; + } + + return true; +} - FD_ZERO(&writer); - FD_SET(cl->socket, &writer); +static int __uh_raw_send(struct client *cl, const char *buf, int len, int sec, + int (*wfn) (struct client *, const char *, int)) +{ + ssize_t rv; + int fd = cl->fd.fd; - timeout.tv_sec = cl->server->conf->network_timeout; - timeout.tv_usec = 0; + while (true) + { + if ((rv = wfn(cl, buf, len)) < 0) + { + if (errno == EINTR) + { + D("IO: Socket(%d) interrupted\n", cl->fd.fd); + continue; + } + else if ((sec > 0) && (errno == EAGAIN || errno == EWOULDBLOCK)) + { + if (!uh_socket_wait(fd, sec, true)) + return -1; + } + else + { + D("IO: Socket(%d) write error: %s\n", fd, strerror(errno)); + return -1; + } + } + /* + * It is not entirely clear whether rv = 0 on nonblocking sockets + * is an error. In real world fuzzing tests, not handling it as close + * led to tight infinite loops in this send procedure, so treat it as + * closed and break out. + */ + else if (rv == 0) + { + D("IO: Socket(%d) closed\n", fd); + return 0; + } + else if (rv < len) + { + D("IO: Socket(%d) short write %d/%d bytes\n", fd, rv, len); + len -= rv; + buf += rv; + continue; + } + else + { + D("IO: Socket(%d) sent %d/%d bytes\n", fd, rv, len); + return rv; + } + } +} - if (select(cl->socket + 1, NULL, &writer, NULL, &timeout) > 0) - return send(cl->socket, buf, len, 0); +int uh_tcp_send_lowlevel(struct client *cl, const char *buf, int len) +{ + return write(cl->fd.fd, buf, len); +} - return -1; +int uh_raw_send(int fd, const char *buf, int len, int sec) +{ + struct client_light cl = { .fd = { .fd = fd } }; + return __uh_raw_send((struct client *)&cl, buf, len, sec, + uh_tcp_send_lowlevel); } int uh_tcp_send(struct client *cl, const char *buf, int len) { + int seconds = cl->server->conf->network_timeout; #ifdef HAVE_TLS if (cl->tls) - return cl->server->conf->tls_send(cl, (void *)buf, len); - else + return __uh_raw_send(cl, buf, len, seconds, + cl->server->conf->tls_send); #endif - return uh_tcp_send_lowlevel(cl, buf, len); + return __uh_raw_send(cl, buf, len, seconds, uh_tcp_send_lowlevel); } -int uh_tcp_peek(struct client *cl, char *buf, int len) +static int __uh_raw_recv(struct client *cl, char *buf, int len, int sec, + int (*rfn) (struct client *, char *, int)) { - /* sanity check, prevent overflowing peek buffer */ - if (len > sizeof(cl->peekbuf)) - return -1; - - int sz = uh_tcp_recv(cl, buf, len); + ssize_t rv; + int fd = cl->fd.fd; - /* store received data in peek buffer */ - if (sz > 0) + while (true) { - cl->peeklen = sz; - memcpy(cl->peekbuf, buf, sz); + if ((rv = rfn(cl, buf, len)) < 0) + { + if (errno == EINTR) + { + continue; + } + else if ((sec > 0) && (errno == EAGAIN || errno == EWOULDBLOCK)) + { + if (!uh_socket_wait(fd, sec, false)) + return -1; + } + else + { + D("IO: Socket(%d) read error: %s\n", fd, strerror(errno)); + return -1; + } + } + else if (rv == 0) + { + D("IO: Socket(%d) closed\n", fd); + return 0; + } + else + { + D("IO: Socket(%d) read %d bytes\n", fd, rv); + return rv; + } } - - return sz; } int uh_tcp_recv_lowlevel(struct client *cl, char *buf, int len) { - fd_set reader; - struct timeval timeout; - - FD_ZERO(&reader); - FD_SET(cl->socket, &reader); - - timeout.tv_sec = cl->server->conf->network_timeout; - timeout.tv_usec = 0; - - if (select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0) - return recv(cl->socket, buf, len, 0); + return read(cl->fd.fd, buf, len); +} - return -1; +int uh_raw_recv(int fd, char *buf, int len, int sec) +{ + struct client_light cl = { .fd = { .fd = fd } }; + return __uh_raw_recv((struct client *)&cl, buf, len, sec, + uh_tcp_recv_lowlevel); } int uh_tcp_recv(struct client *cl, char *buf, int len) { - int sz = 0; - int rsz = 0; - - /* first serve data from peek buffer */ - if (cl->peeklen > 0) - { - sz = min(cl->peeklen, len); - len -= sz; cl->peeklen -= sz; - memcpy(buf, cl->peekbuf, sz); - memmove(cl->peekbuf, &cl->peekbuf[sz], cl->peeklen); - } - - /* caller wants more */ - if (len > 0) - { + int seconds = cl->server->conf->network_timeout; #ifdef HAVE_TLS - if (cl->tls) - rsz = cl->server->conf->tls_recv(cl, (void *)&buf[sz], len); - else + if (cl->tls) + return __uh_raw_recv(cl, buf, len, seconds, + cl->server->conf->tls_recv); #endif - rsz = uh_tcp_recv_lowlevel(cl, (void *)&buf[sz], len); - - if (rsz < 0) - return rsz; - - sz += rsz; - } - - return sz; + return __uh_raw_recv(cl, buf, len, seconds, uh_tcp_recv_lowlevel); } @@ -841,8 +892,9 @@ struct listener * uh_listener_add(int sock, struct config *conf) { memset(new, 0, sizeof(struct listener)); - new->socket = sock; - new->conf = conf; + new->fd.fd = sock; + new->conf = conf; + /* get local endpoint addr */ sl = sizeof(struct sockaddr_in6); @@ -863,7 +915,7 @@ struct listener * uh_listener_lookup(int sock) struct listener *cur = NULL; for (cur = uh_listeners; cur; cur = cur->next) - if (cur->socket == sock) + if (cur->fd.fd == sock) return cur; return NULL; @@ -879,7 +931,7 @@ struct client * uh_client_add(int sock, struct listener *serv) { memset(new, 0, sizeof(struct client)); - new->socket = sock; + new->fd.fd = sock; new->server = serv; /* get remote endpoint addr */ @@ -894,6 +946,8 @@ struct client * uh_client_add(int sock, struct listener *serv) new->next = uh_clients; uh_clients = new; + + serv->n_clients++; } return new; @@ -904,26 +958,50 @@ struct client * uh_client_lookup(int sock) struct client *cur = NULL; for (cur = uh_clients; cur; cur = cur->next) - if (cur->socket == sock) + if (cur->fd.fd == sock) return cur; return NULL; } -void uh_client_remove(int sock) +void uh_client_shutdown(struct client *cl) +{ +#ifdef HAVE_TLS + /* free client tls context */ + if (cl->server && cl->server->conf->tls) + cl->server->conf->tls_close(cl); +#endif + + /* remove from global client list */ + uh_client_remove(cl); +} + +void uh_client_remove(struct client *cl) { struct client *cur = NULL; struct client *prv = NULL; for (cur = uh_clients; cur; prv = cur, cur = cur->next) { - if (cur->socket == sock) + if ((cur == cl) || (!cl && cur->dead)) { if (prv) prv->next = cur->next; else uh_clients = cur->next; + if (cur->timeout.pending) + uloop_timeout_cancel(&cur->timeout); + + if (cur->proc.pid) + uloop_process_delete(&cur->proc); + + uloop_fd_delete(&cur->fd); + close(cur->fd.fd); + + D("IO: Socket(%d) closing\n", cur->fd.fd); + cur->server->n_clients--; + free(cur); break; } diff --git a/package/uhttpd/src/uhttpd-utils.h b/package/uhttpd/src/uhttpd-utils.h index a2cac35ac..797b07def 100644 --- a/package/uhttpd/src/uhttpd-utils.h +++ b/package/uhttpd/src/uhttpd-utils.h @@ -1,7 +1,7 @@ /* * uhttpd - Tiny single-threaded httpd - Utility header * - * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org> + * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -39,6 +39,9 @@ #define fd_cloexec(fd) \ fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) +#define fd_nonblock(fd) \ + fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK) + #define ensure_out(x) \ do { if((x) < 0) goto out; } while(0) @@ -64,18 +67,17 @@ int sa_rfc1918(void *sa); char *strfind(char *haystack, int hslen, const char *needle, int ndlen); -int select_intr(int n, fd_set *r, fd_set *w, fd_set *e, struct timeval *t); +bool uh_socket_wait(int fd, int sec, bool write); +int uh_raw_send(int fd, const char *buf, int len, int seconds); +int uh_raw_recv(int fd, char *buf, int len, int seconds); int uh_tcp_send(struct client *cl, const char *buf, int len); int uh_tcp_send_lowlevel(struct client *cl, const char *buf, int len); -int uh_tcp_peek(struct client *cl, char *buf, int len); int uh_tcp_recv(struct client *cl, char *buf, int len); int uh_tcp_recv_lowlevel(struct client *cl, char *buf, int len); -int uh_http_sendhf( - struct client *cl, int code, const char *summary, - const char *fmt, ... -); +int uh_http_sendhf(struct client *cl, int code, const char *summary, + const char *fmt, ...); #define uh_http_response(cl, code, message) \ uh_http_sendhf(cl, code, message, message) @@ -112,7 +114,17 @@ struct listener * uh_listener_lookup(int sock); struct client * uh_client_add(int sock, struct listener *serv); struct client * uh_client_lookup(int sock); -void uh_client_remove(int sock); + +#define uh_client_error(cl, code, status, ...) do { \ + uh_http_sendhf(cl, code, status, __VA_ARGS__); \ + uh_client_shutdown(cl); \ +} while(0) + +void uh_client_shutdown(struct client *cl); +void uh_client_remove(struct client *cl); + +#define uh_client_gc() uh_client_remove(NULL) + #ifdef HAVE_CGI struct interpreter * uh_interpreter_add(const char *extn, const char *path); diff --git a/package/uhttpd/src/uhttpd.c b/package/uhttpd/src/uhttpd.c index 059281138..e10f5dc9e 100644 --- a/package/uhttpd/src/uhttpd.c +++ b/package/uhttpd/src/uhttpd.c @@ -42,11 +42,6 @@ static void uh_sigterm(int sig) run = 0; } -static void uh_sigchld(int sig) -{ - while (waitpid(-1, NULL, WNOHANG) > 0) { } -} - static void uh_config_parse(struct config *conf) { FILE *c; @@ -126,6 +121,8 @@ static void uh_config_parse(struct config *conf) } } +static void uh_listener_cb(struct uloop_fd *u, unsigned int events); + static int uh_socket_bind(fd_set *serv_fds, int *max_fd, const char *host, const char *port, struct addrinfo *hints, int do_tls, @@ -221,6 +218,9 @@ static int uh_socket_bind(fd_set *serv_fds, int *max_fd, fd_cloexec(sock); *max_fd = max(*max_fd, sock); + l->fd.cb = uh_listener_cb; + uloop_fd_add(&l->fd, ULOOP_READ | ULOOP_WRITE); + bound++; continue; @@ -237,7 +237,7 @@ static int uh_socket_bind(fd_set *serv_fds, int *max_fd, static struct http_request * uh_http_header_parse(struct client *cl, char *buffer, int buflen) { - char *method = &buffer[0]; + char *method = buffer; char *path = NULL; char *version = NULL; @@ -248,9 +248,7 @@ static struct http_request * uh_http_header_parse(struct client *cl, int i; int hdrcount = 0; - static struct http_request req; - - memset(&req, 0, sizeof(req)); + struct http_request *req = &cl->request; /* terminate initial header line */ @@ -282,15 +280,15 @@ static struct http_request * uh_http_header_parse(struct client *cl, switch(method[0]) { case 'G': - req.method = UH_HTTP_MSG_GET; + req->method = UH_HTTP_MSG_GET; break; case 'H': - req.method = UH_HTTP_MSG_HEAD; + req->method = UH_HTTP_MSG_HEAD; break; case 'P': - req.method = UH_HTTP_MSG_POST; + req->method = UH_HTTP_MSG_POST; break; } } @@ -304,7 +302,7 @@ static struct http_request * uh_http_header_parse(struct client *cl, } else { - req.url = path; + req->url = path; } /* check version */ @@ -317,9 +315,13 @@ static struct http_request * uh_http_header_parse(struct client *cl, } else { - req.version = strtof(&version[5], NULL); + req->version = strtof(&version[5], NULL); } + D("SRV: %s %s HTTP/%.1f\n", + (req->method == UH_HTTP_MSG_POST) ? "POST" : + (req->method == UH_HTTP_MSG_GET) ? "GET" : "HEAD", + req->url, req->version); /* process header fields */ for (i = (int)(headers - buffer); i < buflen; i++) @@ -330,10 +332,12 @@ static struct http_request * uh_http_header_parse(struct client *cl, buffer[i] = 0; /* store */ - if ((hdrcount + 1) < array_size(req.headers)) + if ((hdrcount + 1) < array_size(req->headers)) { - req.headers[hdrcount++] = hdrname; - req.headers[hdrcount++] = hdrdata; + D("SRV: HTTP: %s: %s\n", hdrname, hdrdata); + + req->headers[hdrcount++] = hdrname; + req->headers[hdrcount++] = hdrdata; hdrname = hdrdata = NULL; } @@ -341,6 +345,7 @@ static struct http_request * uh_http_header_parse(struct client *cl, /* too large */ else { + D("SRV: HTTP: header too big (too many headers)\n"); uh_http_response(cl, 413, "Request Entity Too Large"); return NULL; } @@ -365,8 +370,8 @@ static struct http_request * uh_http_header_parse(struct client *cl, } /* valid enough */ - req.redirect_status = 200; - return &req; + req->redirect_status = 200; + return req; } /* Malformed request */ @@ -377,64 +382,43 @@ static struct http_request * uh_http_header_parse(struct client *cl, static struct http_request * uh_http_header_recv(struct client *cl) { - static char buffer[UH_LIMIT_MSGHEAD]; - char *bufptr = &buffer[0]; + char *bufptr = cl->httpbuf.buf; char *idxptr = NULL; - struct timeval timeout; - - fd_set reader; - - ssize_t blen = sizeof(buffer)-1; + ssize_t blen = sizeof(cl->httpbuf)-1; ssize_t rlen = 0; - memset(buffer, 0, sizeof(buffer)); + memset(bufptr, 0, sizeof(cl->httpbuf)); while (blen > 0) { - FD_ZERO(&reader); - FD_SET(cl->socket, &reader); + /* receive data */ + ensure_out(rlen = uh_tcp_recv(cl, bufptr, blen)); + D("SRV: Client(%d) peek(%d) = %d\n", cl->fd.fd, blen, rlen); - /* fail after 0.1s */ - timeout.tv_sec = 0; - timeout.tv_usec = 100000; - - /* check whether fd is readable */ - if (select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0) + if (rlen <= 0) { - /* receive data */ - ensure_out(rlen = uh_tcp_peek(cl, bufptr, blen)); - - if ((idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4))) - { - ensure_out(rlen = uh_tcp_recv(cl, bufptr, - (int)(idxptr - bufptr) + 4)); - - /* header read complete ... */ - blen -= rlen; - return uh_http_header_parse(cl, buffer, - sizeof(buffer) - blen - 1); - } - else - { - ensure_out(rlen = uh_tcp_recv(cl, bufptr, rlen)); + D("SRV: Client(%d) dead [%s]\n", cl->fd.fd, strerror(errno)); + return NULL; + } - /* unexpected eof - #7904 */ - if (rlen == 0) - return NULL; + blen -= rlen; + bufptr += rlen; - blen -= rlen; - bufptr += rlen; - } - } - else + if ((idxptr = strfind(cl->httpbuf.buf, sizeof(cl->httpbuf.buf), + "\r\n\r\n", 4))) { - /* invalid request (unexpected eof/timeout) */ - return NULL; + /* header read complete ... */ + cl->httpbuf.ptr = idxptr + 4; + cl->httpbuf.len = bufptr - cl->httpbuf.ptr; + + return uh_http_header_parse(cl, cl->httpbuf.buf, + (cl->httpbuf.ptr - cl->httpbuf.buf)); } } /* request entity too large */ + D("SRV: HTTP: header too big (buffer exceeded)\n"); uh_http_response(cl, 413, "Request Entity Too Large"); out: @@ -456,197 +440,276 @@ static int uh_path_match(const char *prefix, const char *url) } #endif -static void uh_dispatch_request(struct client *cl, struct http_request *req, - struct path_info *pin) +static bool uh_dispatch_request(struct client *cl, struct http_request *req) { -#ifdef HAVE_CGI + struct path_info *pin; struct interpreter *ipr = NULL; + struct config *conf = cl->server->conf; - if (uh_path_match(cl->server->conf->cgi_prefix, pin->name) || - (ipr = uh_interpreter_lookup(pin->phys))) +#ifdef HAVE_LUA + /* Lua request? */ + if (conf->lua_state && + uh_path_match(conf->lua_prefix, req->url)) { - uh_cgi_request(cl, req, pin, ipr); + return conf->lua_request(cl, conf->lua_state); } else #endif + +#ifdef HAVE_UBUS + /* ubus request? */ + if (conf->ubus_state && + uh_path_match(conf->ubus_prefix, req->url)) { - uh_file_request(cl, req, pin); + return conf->ubus_request(cl, conf->ubus_state); } + else +#endif + + /* dispatch request */ + if ((pin = uh_path_lookup(cl, req->url)) != NULL) + { + /* auth ok? */ + if (!pin->redirected && uh_auth_check(cl, req, pin)) + { +#ifdef HAVE_CGI + if (uh_path_match(conf->cgi_prefix, pin->name) || + (ipr = uh_interpreter_lookup(pin->phys)) != NULL) + { + return uh_cgi_request(cl, pin, ipr); + } +#endif + return uh_file_request(cl, pin); + } + } + + /* 404 - pass 1 */ + else + { + /* Try to invoke an error handler */ + if ((pin = uh_path_lookup(cl, conf->error_handler)) != NULL) + { + /* auth ok? */ + if (uh_auth_check(cl, req, pin)) + { + req->redirect_status = 404; +#ifdef HAVE_CGI + if (uh_path_match(conf->cgi_prefix, pin->name) || + (ipr = uh_interpreter_lookup(pin->phys)) != NULL) + { + return uh_cgi_request(cl, pin, ipr); + } +#endif + return uh_file_request(cl, pin); + } + } + + /* 404 - pass 2 */ + else + { + uh_http_sendhf(cl, 404, "Not Found", "No such file or directory"); + } + } + + return false; } -static void uh_mainloop(struct config *conf, fd_set serv_fds, int max_fd) -{ - /* master file descriptor list */ - fd_set used_fds, read_fds; +static void uh_client_cb(struct uloop_fd *u, unsigned int events); - /* working structs */ - struct http_request *req; - struct path_info *pin; +static void uh_listener_cb(struct uloop_fd *u, unsigned int events) +{ + int new_fd; + struct listener *serv; struct client *cl; + struct config *conf; - /* maximum file descriptor number */ - int new_fd, cur_fd = 0; - - /* clear the master and temp sets */ - FD_ZERO(&used_fds); - FD_ZERO(&read_fds); + serv = container_of(u, struct listener, fd); + conf = serv->conf; - /* backup server descriptor set */ - used_fds = serv_fds; + /* defer client if maximum number of requests is exceeded */ + if (serv->n_clients >= conf->max_requests) + return; - /* loop */ - while (run) + /* handle new connections */ + if ((new_fd = accept(u->fd, NULL, 0)) != -1) { - /* create a working copy of the used fd set */ - read_fds = used_fds; + D("SRV: Server(%d) accept => Client(%d)\n", u->fd, new_fd); - /* sleep until socket activity */ - if (select(max_fd + 1, &read_fds, NULL, NULL, NULL) == -1) + /* add to global client list */ + if ((cl = uh_client_add(new_fd, serv)) != NULL) { - perror("select()"); - exit(1); - } + /* add client socket to global fdset */ + uloop_fd_add(&cl->fd, ULOOP_READ | ULOOP_WRITE); - /* run through the existing connections looking for data to be read */ - for (cur_fd = 0; cur_fd <= max_fd; cur_fd++) - { - /* is a socket managed by us */ - if (FD_ISSET(cur_fd, &read_fds)) +#ifdef HAVE_TLS + /* setup client tls context */ + if (conf->tls) { - /* is one of our listen sockets */ - if (FD_ISSET(cur_fd, &serv_fds)) + if (conf->tls_accept(cl) < 1) { - /* handle new connections */ - if ((new_fd = accept(cur_fd, NULL, 0)) != -1) - { - /* add to global client list */ - if ((cl = uh_client_add(new_fd, uh_listener_lookup(cur_fd))) != NULL) - { -#ifdef HAVE_TLS - /* setup client tls context */ - if (conf->tls) - { - if (conf->tls_accept(cl) < 1) - { - fprintf(stderr, - "tls_accept failed, " - "connection dropped\n"); - - /* close client socket */ - close(new_fd); - - /* remove from global client list */ - uh_client_remove(new_fd); - - continue; - } - } -#endif + D("SRV: Client(%d) SSL handshake failed, drop\n", new_fd); - /* add client socket to global fdset */ - FD_SET(new_fd, &used_fds); - fd_cloexec(new_fd); - max_fd = max(max_fd, new_fd); - } - - /* insufficient resources */ - else - { - fprintf(stderr, - "uh_client_add(): " - "Cannot allocate memory\n"); - - close(new_fd); - } - } + /* remove from global client list */ + uh_client_remove(cl); + return; } + } +#endif - /* is a client socket */ - else - { - if (!(cl = uh_client_lookup(cur_fd))) - { - /* this should not happen! */ - fprintf(stderr, - "uh_client_lookup(): No entry for fd %i!\n", - cur_fd); + cl->fd.cb = uh_client_cb; + fd_cloexec(new_fd); + } - goto cleanup; - } + /* insufficient resources */ + else + { + fprintf(stderr, "uh_client_add(): Cannot allocate memory\n"); + close(new_fd); + } + } +} - /* parse message header */ - if ((req = uh_http_header_recv(cl)) != NULL) - { - /* RFC1918 filtering required? */ - if (conf->rfc1918_filter && - sa_rfc1918(&cl->peeraddr) && - !sa_rfc1918(&cl->servaddr)) - { - uh_http_sendhf(cl, 403, "Forbidden", - "Rejected request from RFC1918 IP " - "to public server address"); - } - else -#ifdef HAVE_LUA - /* Lua request? */ - if (conf->lua_state && - uh_path_match(conf->lua_prefix, req->url)) - { - conf->lua_request(cl, req, conf->lua_state); - } - else -#endif - /* dispatch request */ - if ((pin = uh_path_lookup(cl, req->url)) != NULL) - { - /* auth ok? */ - if (!pin->redirected && uh_auth_check(cl, req, pin)) - uh_dispatch_request(cl, req, pin); - } - - /* 404 */ - else - { - /* Try to invoke an error handler */ - pin = uh_path_lookup(cl, conf->error_handler); - - if (pin && uh_auth_check(cl, req, pin)) - { - req->redirect_status = 404; - uh_dispatch_request(cl, req, pin); - } - else - { - uh_http_sendhf(cl, 404, "Not Found", - "No such file or directory"); - } - } - } +static void uh_child_cb(struct uloop_process *p, int rv) +{ + struct client *cl = container_of(p, struct client, proc); -#ifdef HAVE_TLS - /* free client tls context */ - if (conf->tls) - conf->tls_close(cl); -#endif + D("SRV: Client(%d) child(%d) is dead\n", cl->fd.fd, cl->proc.pid); - cleanup: + cl->dead = true; + cl->fd.eof = true; + uh_client_cb(&cl->fd, ULOOP_READ | ULOOP_WRITE); +} - /* close client socket */ - close(cur_fd); - FD_CLR(cur_fd, &used_fds); +static void uh_kill9_cb(struct uloop_timeout *t) +{ + struct client *cl = container_of(t, struct client, timeout); - /* remove from global client list */ - uh_client_remove(cur_fd); - } + if (!kill(cl->proc.pid, 0)) + { + D("SRV: Client(%d) child(%d) kill(SIGKILL)...\n", + cl->fd.fd, cl->proc.pid); + + kill(cl->proc.pid, SIGKILL); + } +} + +static void uh_timeout_cb(struct uloop_timeout *t) +{ + struct client *cl = container_of(t, struct client, timeout); + + D("SRV: Client(%d) child(%d) timed out\n", cl->fd.fd, cl->proc.pid); + + if (!kill(cl->proc.pid, 0)) + { + D("SRV: Client(%d) child(%d) kill(SIGTERM)...\n", + cl->fd.fd, cl->proc.pid); + + kill(cl->proc.pid, SIGTERM); + + cl->timeout.cb = uh_kill9_cb; + uloop_timeout_set(&cl->timeout, 1000); + } +} + +static void uh_client_cb(struct uloop_fd *u, unsigned int events) +{ + int i; + struct client *cl; + struct config *conf; + struct http_request *req; + + cl = container_of(u, struct client, fd); + conf = cl->server->conf; + + D("SRV: Client(%d) enter callback\n", u->fd); + + /* undispatched yet */ + if (!cl->dispatched) + { + /* we have no headers yet and this was a write event, ignore... */ + if (!(events & ULOOP_READ)) + { + D("SRV: Client(%d) ignoring write event before headers\n", u->fd); + return; + } + + /* attempt to receive and parse headers */ + if (!(req = uh_http_header_recv(cl))) + { + D("SRV: Client(%d) failed to receive header\n", u->fd); + uh_client_shutdown(cl); + return; + } + + /* process expect headers */ + foreach_header(i, req->headers) + { + if (strcasecmp(req->headers[i], "Expect")) + continue; + + if (strcasecmp(req->headers[i+1], "100-continue")) + { + D("SRV: Client(%d) unknown expect header (%s)\n", + u->fd, req->headers[i+1]); + + uh_http_response(cl, 417, "Precondition Failed"); + uh_client_shutdown(cl); + return; + } + else + { + D("SRV: Client(%d) sending HTTP/1.1 100 Continue\n", u->fd); + + uh_http_sendf(cl, NULL, "HTTP/1.1 100 Continue\r\n\r\n"); + cl->httpbuf.len = 0; /* client will re-send the body */ + break; } } + + /* RFC1918 filtering */ + if (conf->rfc1918_filter && + sa_rfc1918(&cl->peeraddr) && !sa_rfc1918(&cl->servaddr)) + { + uh_http_sendhf(cl, 403, "Forbidden", + "Rejected request from RFC1918 IP " + "to public server address"); + + uh_client_shutdown(cl); + return; + } + + /* dispatch request */ + if (!uh_dispatch_request(cl, req)) + { + D("SRV: Client(%d) failed to dispach request\n", u->fd); + uh_client_shutdown(cl); + return; + } + + /* request handler spawned a child, register handler */ + if (cl->proc.pid) + { + D("SRV: Client(%d) child(%d) spawned\n", u->fd, cl->proc.pid); + + cl->proc.cb = uh_child_cb; + uloop_process_add(&cl->proc); + + cl->timeout.cb = uh_timeout_cb; + uloop_timeout_set(&cl->timeout, conf->script_timeout * 1000); + } + + /* header processing complete */ + D("SRV: Client(%d) dispatched\n", u->fd); + cl->dispatched = true; + return; } -#ifdef HAVE_LUA - /* destroy the Lua state */ - if (conf->lua_state != NULL) - conf->lua_close(conf->lua_state); -#endif + if (!cl->cb(cl)) + { + D("SRV: Client(%d) response callback signalized EOF\n", u->fd); + uh_client_shutdown(cl); + return; + } } #ifdef HAVE_TLS @@ -710,9 +773,6 @@ int main (int argc, char **argv) struct sigaction sa; struct config conf; - /* signal mask */ - sigset_t ss; - /* maximum file descriptor number */ int cur_fd, max_fd = 0; @@ -736,25 +796,17 @@ int main (int argc, char **argv) FD_ZERO(&serv_fds); - /* handle SIGPIPE, SIGINT, SIGTERM, SIGCHLD */ + /* handle SIGPIPE, SIGINT, SIGTERM */ sa.sa_flags = 0; sigemptyset(&sa.sa_mask); sa.sa_handler = SIG_IGN; sigaction(SIGPIPE, &sa, NULL); - sa.sa_handler = uh_sigchld; - sigaction(SIGCHLD, &sa, NULL); - sa.sa_handler = uh_sigterm; sigaction(SIGINT, &sa, NULL); sigaction(SIGTERM, &sa, NULL); - /* defer SIGCHLD */ - sigemptyset(&ss); - sigaddset(&ss, SIGCHLD); - sigprocmask(SIG_BLOCK, &ss, NULL); - /* prepare addrinfo hints */ memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_UNSPEC; @@ -765,9 +817,10 @@ int main (int argc, char **argv) memset(&conf, 0, sizeof(conf)); memset(bind, 0, sizeof(bind)); + uloop_init(); while ((opt = getopt(argc, argv, - "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:x:i:t:T:A:")) > 0) + "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:n:x:i:t:T:A:u:U:")) > 0) { switch(opt) { @@ -894,6 +947,10 @@ int main (int argc, char **argv) conf.rfc1918_filter = 1; break; + case 'n': + conf.max_requests = atoi(optarg); + break; + #ifdef HAVE_CGI /* cgi prefix */ case 'x': @@ -928,6 +985,18 @@ int main (int argc, char **argv) break; #endif +#ifdef HAVE_UBUS + /* ubus prefix */ + case 'u': + conf.ubus_prefix = optarg; + break; + + /* ubus socket */ + case 'U': + conf.ubus_socket = optarg; + break; +#endif + #if defined(HAVE_CGI) || defined(HAVE_LUA) /* script timeout */ case 't': @@ -1002,16 +1071,21 @@ int main (int argc, char **argv) " -S Do not follow symbolic links outside of the docroot\n" " -D Do not allow directory listings, send 403 instead\n" " -R Enable RFC1918 filter\n" + " -n count Maximum allowed number of concurrent requests\n" #ifdef HAVE_LUA " -l string URL prefix for Lua handler, default is '/lua'\n" " -L file Lua handler script, omit to disable Lua\n" #endif +#ifdef HAVE_UBUS + " -u string URL prefix for HTTP/JSON handler, default is '/ubus'\n" + " -U file Override ubus socket path\n" +#endif #ifdef HAVE_CGI " -x string URL prefix for CGI handler, default is '/cgi-bin'\n" " -i .ext=path Use interpreter at path for files with the given extension\n" #endif -#if defined(HAVE_CGI) || defined(HAVE_LUA) - " -t seconds CGI and Lua script timeout in seconds, default is 60\n" +#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS) + " -t seconds CGI, Lua and UBUS script timeout in seconds, default is 60\n" #endif " -T seconds Network timeout in seconds, default is 30\n" " -d string URL decode given string\n" @@ -1053,11 +1127,15 @@ int main (int argc, char **argv) /* config file */ uh_config_parse(&conf); + /* default max requests */ + if (conf.max_requests <= 0) + conf.max_requests = 3; + /* default network timeout */ if (conf.network_timeout <= 0) conf.network_timeout = 30; -#if defined(HAVE_CGI) || defined(HAVE_LUA) +#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS) /* default script timeout */ if (conf.script_timeout <= 0) conf.script_timeout = 60; @@ -1103,6 +1181,36 @@ int main (int argc, char **argv) } #endif +#ifdef HAVE_UBUS + /* load ubus plugin */ + if (!(lib = dlopen("uhttpd_ubus.so", RTLD_LAZY | RTLD_GLOBAL))) + { + fprintf(stderr, + "Notice: Unable to load ubus plugin - disabling ubus support! " + "(Reason: %s)\n", dlerror()); + } + else + { + /* resolve functions */ + if (!(conf.ubus_init = dlsym(lib, "uh_ubus_init")) || + !(conf.ubus_close = dlsym(lib, "uh_ubus_close")) || + !(conf.ubus_request = dlsym(lib, "uh_ubus_request"))) + { + fprintf(stderr, + "Error: Failed to lookup required symbols " + "in ubus plugin: %s\n", dlerror() + ); + exit(1); + } + + /* default ubus prefix */ + if (!conf.ubus_prefix) + conf.ubus_prefix = "/ubus"; + + conf.ubus_state = conf.ubus_init(&conf); + } +#endif + /* fork (if not disabled) */ if (!nofork) { @@ -1134,7 +1242,7 @@ int main (int argc, char **argv) } /* server main loop */ - uh_mainloop(&conf, serv_fds, max_fd); + uloop_run(); #ifdef HAVE_LUA /* destroy the Lua state */ @@ -1142,5 +1250,11 @@ int main (int argc, char **argv) conf.lua_close(conf.lua_state); #endif +#ifdef HAVE_UBUS + /* destroy the ubus state */ + if (conf.ubus_state != NULL) + conf.ubus_close(conf.ubus_state); +#endif + return 0; } diff --git a/package/uhttpd/src/uhttpd.h b/package/uhttpd/src/uhttpd.h index c03d1ae65..8fa3f219b 100644 --- a/package/uhttpd/src/uhttpd.h +++ b/package/uhttpd/src/uhttpd.h @@ -20,6 +20,7 @@ #include <stdio.h> #include <stdlib.h> +#include <stdbool.h> #include <string.h> #include <unistd.h> #include <signal.h> @@ -36,6 +37,9 @@ #include <errno.h> #include <dlfcn.h> +#include <libubox/list.h> +#include <libubox/uloop.h> + #ifdef HAVE_LUA #include <lua.h> @@ -50,6 +54,12 @@ #define SOL_TCP 6 #endif +#ifdef DEBUG +#define D(...) fprintf(stderr, __VA_ARGS__) +#else +#define D(...) +#endif + #define UH_LIMIT_MSGHEAD 4096 #define UH_LIMIT_HEADERS 64 @@ -60,10 +70,14 @@ #define UH_HTTP_MSG_HEAD 1 #define UH_HTTP_MSG_POST 2 +#define UH_SOCK_CLIENT 0 +#define UH_SOCK_SERVER 1 + struct listener; struct client; struct interpreter; struct http_request; +struct uh_ubus_state; struct config { char docroot[PATH_MAX]; @@ -76,6 +90,7 @@ struct config { int network_timeout; int rfc1918_filter; int tcp_keepalive; + int max_requests; #ifdef HAVE_CGI char *cgi_prefix; #endif @@ -85,9 +100,17 @@ struct config { lua_State *lua_state; lua_State * (*lua_init) (const struct config *conf); void (*lua_close) (lua_State *L); - void (*lua_request) (struct client *cl, struct http_request *req, lua_State *L); + bool (*lua_request) (struct client *cl, lua_State *L); +#endif +#ifdef HAVE_UBUS + char *ubus_prefix; + char *ubus_socket; + void *ubus_state; + struct uh_ubus_state * (*ubus_init) (const struct config *conf); + void (*ubus_close) (struct uh_ubus_state *state); + bool (*ubus_request) (struct client *cl, struct uh_ubus_state *state); #endif -#if defined(HAVE_CGI) || defined(HAVE_LUA) +#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS) int script_timeout; #endif #ifdef HAVE_TLS @@ -100,13 +123,30 @@ struct config { void (*tls_free) (struct listener *l); int (*tls_accept) (struct client *c); void (*tls_close) (struct client *c); - int (*tls_recv) (struct client *c, void *buf, int len); - int (*tls_send) (struct client *c, void *buf, int len); + int (*tls_recv) (struct client *c, char *buf, int len); + int (*tls_send) (struct client *c, const char *buf, int len); #endif }; +struct http_request { + int method; + float version; + int redirect_status; + char *url; + char *headers[UH_LIMIT_HEADERS]; + struct auth_realm *realm; +}; + +struct http_response { + int statuscode; + char *statusmsg; + char *headers[UH_LIMIT_HEADERS]; +}; + struct listener { + struct uloop_fd fd; int socket; + int n_clients; struct sockaddr_in6 addr; struct config *conf; #ifdef HAVE_TLS @@ -116,16 +156,34 @@ struct listener { }; struct client { - int socket; - int peeklen; - char peekbuf[UH_LIMIT_MSGHEAD]; +#ifdef HAVE_TLS + SSL *tls; +#endif + struct uloop_fd fd; + struct uloop_process proc; + struct uloop_timeout timeout; + bool (*cb)(struct client *); + void *priv; + bool dispatched; + bool dead; + struct { + char buf[UH_LIMIT_MSGHEAD]; + char *ptr; + int len; + } httpbuf; struct listener *server; + struct http_request request; + struct http_response response; struct sockaddr_in6 servaddr; struct sockaddr_in6 peeraddr; + struct client *next; +}; + +struct client_light { #ifdef HAVE_TLS SSL *tls; #endif - struct client *next; + struct uloop_fd fd; }; struct auth_realm { @@ -135,21 +193,6 @@ struct auth_realm { struct auth_realm *next; }; -struct http_request { - int method; - float version; - int redirect_status; - char *url; - char *headers[UH_LIMIT_HEADERS]; - struct auth_realm *realm; -}; - -struct http_response { - int statuscode; - char *statusmsg; - char *headers[UH_LIMIT_HEADERS]; -}; - #ifdef HAVE_CGI struct interpreter { char path[PATH_MAX]; |