From 9c8997d54dc9df184bfcedeabf0b3c85cf5e6753 Mon Sep 17 00:00:00 2001 From: nbd Date: Wed, 10 Oct 2012 12:32:29 +0000 Subject: packages: sort network related packages into package/network/ git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33688 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- package/iwcap/Makefile | 50 ---- package/iwcap/src/iwcap.c | 582 ---------------------------------------------- 2 files changed, 632 deletions(-) delete mode 100644 package/iwcap/Makefile delete mode 100644 package/iwcap/src/iwcap.c (limited to 'package/iwcap') diff --git a/package/iwcap/Makefile b/package/iwcap/Makefile deleted file mode 100644 index b406bdfb4..000000000 --- a/package/iwcap/Makefile +++ /dev/null @@ -1,50 +0,0 @@ -# -# Copyright (C) 2012 Jo-Philipp Wich -# -# This is free software, licensed under the Apache 2 license. -# - -include $(TOPDIR)/rules.mk - -PKG_NAME:=iwcap -PKG_RELEASE:=1 - -include $(INCLUDE_DIR)/package.mk - - -define Package/iwcap - SECTION:=utils - CATEGORY:=Utilities - TITLE:=Simple radiotap capture utility - MAINTAINER:=Jo-Philipp Wich -endef - -define Package/iwcap/description - The iwcap utility receives radiotap packet data from wifi monitor interfaces - and outputs it to pcap format. It gathers recived packets in a fixed ring - buffer to dump them on demand which is useful for background monitoring. - Alternatively the utility can stream the data to stdout to act as remote - capture drone for Wireshark or similar programs. -endef - - -define Build/Prepare - $(INSTALL_DIR) $(PKG_BUILD_DIR) - $(CP) ./src/* $(PKG_BUILD_DIR)/ -endef - -define Build/Configure -endef - -define Build/Compile - $(TARGET_CC) $(TARGET_CFLAGS) \ - -o $(PKG_BUILD_DIR)/iwcap $(PKG_BUILD_DIR)/iwcap.c -endef - - -define Package/iwcap/install - $(INSTALL_DIR) $(1)/usr/sbin - $(INSTALL_BIN) $(PKG_BUILD_DIR)/iwcap $(1)/usr/sbin/iwcap -endef - -$(eval $(call BuildPackage,iwcap)) diff --git a/package/iwcap/src/iwcap.c b/package/iwcap/src/iwcap.c deleted file mode 100644 index a71dca232..000000000 --- a/package/iwcap/src/iwcap.c +++ /dev/null @@ -1,582 +0,0 @@ -/* - * iwcap.c - A simply radiotap capture utility outputting pcap dumps - * - * Copyright 2012 Jo-Philipp Wich - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define ARPHRD_IEEE80211_RADIOTAP 803 - -#define DLT_IEEE802_11_RADIO 127 -#define LEN_IEEE802_11_HDR 32 - -#define FRAMETYPE_MASK 0xFC -#define FRAMETYPE_BEACON 0x80 -#define FRAMETYPE_DATA 0x08 - -#if __BYTE_ORDER == __BIG_ENDIAN -#define le16(x) __bswap_16(x) -#else -#define le16(x) (x) -#endif - -uint8_t run_dump = 0; -uint8_t run_stop = 0; -uint8_t run_daemon = 0; - -uint32_t frames_captured = 0; -uint32_t frames_filtered = 0; - -int capture_sock = -1; -const char *ifname = NULL; - - -struct ringbuf { - uint32_t len; /* number of slots */ - uint32_t fill; /* last used slot */ - uint32_t slen; /* slot size */ - void *buf; /* ring memory */ -}; - -struct ringbuf_entry { - uint32_t len; /* used slot memory */ - uint32_t olen; /* original data size */ - uint32_t sec; /* epoch of slot creation */ - uint32_t usec; /* epoch microseconds */ -}; - -typedef struct pcap_hdr_s { - uint32_t magic_number; /* magic number */ - uint16_t version_major; /* major version number */ - uint16_t version_minor; /* minor version number */ - int32_t thiszone; /* GMT to local correction */ - uint32_t sigfigs; /* accuracy of timestamps */ - uint32_t snaplen; /* max length of captured packets, in octets */ - uint32_t network; /* data link type */ -} pcap_hdr_t; - -typedef struct pcaprec_hdr_s { - uint32_t ts_sec; /* timestamp seconds */ - uint32_t ts_usec; /* timestamp microseconds */ - uint32_t incl_len; /* number of octets of packet saved in file */ - uint32_t orig_len; /* actual length of packet */ -} pcaprec_hdr_t; - -typedef struct ieee80211_radiotap_header { - u_int8_t it_version; /* set to 0 */ - u_int8_t it_pad; - u_int16_t it_len; /* entire length */ - u_int32_t it_present; /* fields present */ -} __attribute__((__packed__)) radiotap_hdr_t; - - -int check_type(void) -{ - struct ifreq ifr; - - strncpy(ifr.ifr_name, ifname, IFNAMSIZ); - - if (ioctl(capture_sock, SIOCGIFHWADDR, &ifr) < 0) - return -1; - - return (ifr.ifr_hwaddr.sa_family == ARPHRD_IEEE80211_RADIOTAP); -} - -int set_promisc(int on) -{ - struct ifreq ifr; - - strncpy(ifr.ifr_name, ifname, IFNAMSIZ); - - if (ioctl(capture_sock, SIOCGIFFLAGS, &ifr) < 0) - return -1; - - if (on && !(ifr.ifr_flags & IFF_PROMISC)) - { - ifr.ifr_flags |= IFF_PROMISC; - - if (ioctl(capture_sock, SIOCSIFFLAGS, &ifr)) - return -1; - - return 1; - } - else if (!on && (ifr.ifr_flags & IFF_PROMISC)) - { - ifr.ifr_flags &= ~IFF_PROMISC; - - if (ioctl(capture_sock, SIOCSIFFLAGS, &ifr)) - return -1; - - return 1; - } - - return 0; -} - - -void sig_dump(int sig) -{ - run_dump = 1; -} - -void sig_teardown(int sig) -{ - run_stop = 1; -} - - -void write_pcap_header(FILE *o) -{ - pcap_hdr_t ghdr = { - .magic_number = 0xa1b2c3d4, - .version_major = 2, - .version_minor = 4, - .thiszone = 0, - .sigfigs = 0, - .snaplen = 0xFFFF, - .network = DLT_IEEE802_11_RADIO - }; - - fwrite(&ghdr, 1, sizeof(ghdr), o); -} - -void write_pcap_frame(FILE *o, uint32_t *sec, uint32_t *usec, - uint16_t len, uint16_t olen) -{ - struct timeval tv; - pcaprec_hdr_t fhdr; - - if (!sec || !usec) - { - gettimeofday(&tv, NULL); - } - else - { - tv.tv_sec = *sec; - tv.tv_usec = *usec; - } - - fhdr.ts_sec = tv.tv_sec; - fhdr.ts_usec = tv.tv_usec; - fhdr.incl_len = len; - fhdr.orig_len = olen; - - fwrite(&fhdr, 1, sizeof(fhdr), o); -} - - -struct ringbuf * ringbuf_init(uint32_t num_item, uint16_t len_item) -{ - static struct ringbuf r; - - if (len_item <= 0) - return NULL; - - r.buf = malloc(num_item * (len_item + sizeof(struct ringbuf_entry))); - - if (r.buf) - { - r.len = num_item; - r.fill = 0; - r.slen = (len_item + sizeof(struct ringbuf_entry)); - - memset(r.buf, 0, num_item * len_item); - - return &r; - } - - return NULL; -} - -struct ringbuf_entry * ringbuf_add(struct ringbuf *r) -{ - struct timeval t; - struct ringbuf_entry *e; - - gettimeofday(&t, NULL); - - e = r->buf + (r->fill++ * r->slen); - r->fill %= r->len; - - memset(e, 0, r->slen); - - e->sec = t.tv_sec; - e->usec = t.tv_usec; - - return e; -} - -struct ringbuf_entry * ringbuf_get(struct ringbuf *r, int i) -{ - struct ringbuf_entry *e = r->buf + (((r->fill + i) % r->len) * r->slen); - - if (e->len > 0) - return e; - - return NULL; -} - -void ringbuf_free(struct ringbuf *r) -{ - free(r->buf); - memset(r, 0, sizeof(*r)); -} - - -void msg(const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - - if (run_daemon) - vsyslog(LOG_INFO | LOG_USER, fmt, ap); - else - vfprintf(stderr, fmt, ap); - - va_end(ap); -} - - -int main(int argc, char **argv) -{ - int i, n; - struct ringbuf *ring; - struct ringbuf_entry *e; - struct sockaddr_ll local = { - .sll_family = AF_PACKET, - .sll_protocol = htons(ETH_P_ALL) - }; - - radiotap_hdr_t *rhdr; - - uint8_t frametype; - uint8_t pktbuf[0xFFFF]; - ssize_t pktlen; - - FILE *o; - - int opt; - - uint8_t promisc = 0; - uint8_t streaming = 0; - uint8_t foreground = 0; - uint8_t filter_data = 0; - uint8_t filter_beacon = 0; - uint8_t header_written = 0; - - uint32_t ringsz = 1024 * 1024; /* 1 Mbyte ring buffer */ - uint16_t pktcap = 256; /* truncate frames after 265KB */ - - const char *output = NULL; - - - while ((opt = getopt(argc, argv, "i:r:c:o:sfhBD")) != -1) - { - switch (opt) - { - case 'i': - ifname = optarg; - if (!(local.sll_ifindex = if_nametoindex(ifname))) - { - msg("Unknown interface '%s'\n", ifname); - return 2; - } - break; - - case 'r': - ringsz = atoi(optarg); - if (ringsz < (3 * pktcap)) - { - msg("Ring size of %d bytes is too short, " - "must be at least %d bytes\n", ringsz, 3 * pktcap); - return 3; - } - break; - - case 'c': - pktcap = atoi(optarg); - if (pktcap <= (sizeof(radiotap_hdr_t) + LEN_IEEE802_11_HDR)) - { - msg("Packet truncate after %d bytes is too short, " - "must be at least %d bytes\n", - pktcap, sizeof(radiotap_hdr_t) + LEN_IEEE802_11_HDR); - return 4; - } - break; - - case 's': - streaming = 1; - break; - - case 'o': - output = optarg; - break; - - case 'B': - filter_beacon = 1; - break; - - case 'D': - filter_data = 1; - break; - - case 'f': - foreground = 1; - break; - - case 'h': - msg( - "Usage:\n" - " %s -i {iface} -s [-b] [-d]\n" - " %s -i {iface} -o {file} [-r len] [-c len] [-B] [-D] [-f]\n" - "\n" - " -i iface\n" - " Specify interface to use, must be in monitor mode and\n" - " produce IEEE 802.11 Radiotap headers.\n\n" - " -s\n" - " Stream to stdout instead of Dumping to file on USR1.\n\n" - " -o file\n" - " Write current ringbuffer contents to given output file\n" - " on receipt of SIGUSR1.\n\n" - " -r len\n" - " Specify the amount of bytes to use for the ringbuffer.\n" - " The default length is %d bytes.\n\n" - " -c len\n" - " Truncate captured packets after given amount of bytes.\n" - " The default size limit is %d bytes.\n\n" - " -B\n" - " Don't store beacon frames in ring, default is keep.\n\n" - " -D\n" - " Don't store data frames in ring, default is keep.\n\n" - " -f\n" - " Do not daemonize but keep running in foreground.\n\n" - " -h\n" - " Display this help.\n\n", - argv[0], argv[0], ringsz, pktcap); - - return 1; - } - } - - if (!streaming && !output) - { - msg("No output file specified\n"); - return 1; - } - - if (streaming && output) - { - msg("The -s and -o options are exclusive\n"); - return 1; - } - - if (streaming && isatty(1)) - { - msg("Refusing to stream into a terminal\n"); - return 1; - } - - if (!local.sll_ifindex) - { - msg("No interface specified\n"); - return 2; - } - - if (!check_type()) - { - msg("Bad interface: not ARPHRD_IEEE80211_RADIOTAP\n"); - return 2; - } - - if ((capture_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) - { - msg("Unable to create raw socket: %s\n", - strerror(errno)); - return 6; - } - - if (bind(capture_sock, (struct sockaddr *)&local, sizeof(local)) == -1) - { - msg("Unable to bind to interface: %s\n", - strerror(errno)); - return 7; - } - - if (!streaming) - { - if (!foreground) - { - switch (fork()) - { - case -1: - msg("Unable to fork: %s\n", strerror(errno)); - return 8; - - case 0: - umask(0077); - chdir("/"); - freopen("/dev/null", "r", stdin); - freopen("/dev/null", "w", stdout); - freopen("/dev/null", "w", stderr); - run_daemon = 1; - break; - - default: - msg("Daemon launched ...\n"); - return 0; - } - } - - msg("Monitoring interface %s ...\n", ifname); - - if (!(ring = ringbuf_init(ringsz / pktcap, pktcap))) - { - msg("Unable to allocate ring buffer: %s\n", - strerror(errno)); - return 5; - } - - msg(" * Using %d bytes ringbuffer with %d slots\n", ringsz, ring->len); - msg(" * Truncating frames at %d bytes\n", pktcap); - msg(" * Dumping data to file %s\n", output); - - signal(SIGUSR1, sig_dump); - } - else - { - msg("Monitoring interface %s ...\n", ifname); - msg(" * Streaming data to stdout\n"); - } - - msg(" * Beacon frames are %sfiltered\n", filter_beacon ? "" : "not "); - msg(" * Data frames are %sfiltered\n", filter_data ? "" : "not "); - - signal(SIGINT, sig_teardown); - signal(SIGTERM, sig_teardown); - - promisc = set_promisc(1); - - /* capture loop */ - while (1) - { - if (run_stop) - { - msg("Shutting down ...\n"); - - if (promisc) - set_promisc(0); - - if (ring) - ringbuf_free(ring); - - return 0; - } - else if (run_dump) - { - msg("Dumping ring to %s ...\n", output); - - if (!(o = fopen(output, "w"))) - { - msg("Unable to open %s: %s\n", - output, strerror(errno)); - } - else - { - write_pcap_header(o); - - /* sig_dump packet buffer */ - for (i = 0, n = 0; i < ring->len; i++) - { - if (!(e = ringbuf_get(ring, i))) - continue; - - write_pcap_frame(o, &(e->sec), &(e->usec), e->len, e->olen); - fwrite((void *)e + sizeof(*e), 1, e->len, o); - n++; - } - - fclose(o); - - msg(" * %d frames captured\n", frames_captured); - msg(" * %d frames filtered\n", frames_filtered); - msg(" * %d frames dumped\n", n); - } - - run_dump = 0; - } - - pktlen = recvfrom(capture_sock, pktbuf, sizeof(pktbuf), 0, NULL, 0); - frames_captured++; - - /* check received frametype, if we should filter it, rewind the ring */ - rhdr = (radiotap_hdr_t *)pktbuf; - - if (pktlen <= sizeof(radiotap_hdr_t) || le16(rhdr->it_len) >= pktlen) - { - frames_filtered++; - continue; - } - - frametype = *(uint8_t *)(pktbuf + le16(rhdr->it_len)); - - if ((filter_data && (frametype & FRAMETYPE_MASK) == FRAMETYPE_DATA) || - (filter_beacon && (frametype & FRAMETYPE_MASK) == FRAMETYPE_BEACON)) - { - frames_filtered++; - continue; - } - - if (streaming) - { - if (!header_written) - { - write_pcap_header(stdout); - header_written = 1; - } - - write_pcap_frame(stdout, NULL, NULL, pktlen, pktlen); - fwrite(pktbuf, 1, pktlen, stdout); - fflush(stdout); - } - else - { - e = ringbuf_add(ring); - e->olen = pktlen; - e->len = (pktlen > pktcap) ? pktcap : pktlen; - - memcpy((void *)e + sizeof(*e), pktbuf, e->len); - } - } - - return 0; -} -- cgit v1.2.3