From 8f7f273fa4ce32e983f4437a7efa89d75062a2f9 Mon Sep 17 00:00:00 2001 From: nbd Date: Mon, 6 Jul 2009 19:05:24 +0000 Subject: upgrade to the new version of wprobe - includes reconfigurable layer 2 statistics, remote access, more configuration options and many bugfixes git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16719 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- package/wprobe/src/user/wprobe.c | 571 --------------------------------------- 1 file changed, 571 deletions(-) delete mode 100644 package/wprobe/src/user/wprobe.c (limited to 'package/wprobe/src/user/wprobe.c') diff --git a/package/wprobe/src/user/wprobe.c b/package/wprobe/src/user/wprobe.c deleted file mode 100644 index e48f768e5..000000000 --- a/package/wprobe/src/user/wprobe.c +++ /dev/null @@ -1,571 +0,0 @@ -/* - * wprobe.c: Wireless probe user space library - * Copyright (C) 2008-2009 Felix Fietkau - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "wprobe.h" - -#define DEBUG 1 -#ifdef DEBUG -#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__) -#else -#define DPRINTF(fmt, ...) do {} while (0) -#endif - -static int n_devs = 0; -static struct nl_sock *handle = NULL; -static struct nl_cache *cache = NULL; -static struct genl_family *family = NULL; -static struct nlattr *tb[WPROBE_ATTR_LAST+1]; -static struct nla_policy attribute_policy[WPROBE_ATTR_LAST+1] = { - [WPROBE_ATTR_ID] = { .type = NLA_U32 }, - [WPROBE_ATTR_MAC] = { .type = NLA_UNSPEC, .minlen = 6, .maxlen = 6 }, - [WPROBE_ATTR_NAME] = { .type = NLA_STRING }, - [WPROBE_ATTR_FLAGS] = { .type = NLA_U32 }, - [WPROBE_ATTR_TYPE] = { .type = NLA_U8 }, - [WPROBE_VAL_S8] = { .type = NLA_U8 }, - [WPROBE_VAL_S16] = { .type = NLA_U16 }, - [WPROBE_VAL_S32] = { .type = NLA_U32 }, - [WPROBE_VAL_S64] = { .type = NLA_U64 }, - [WPROBE_VAL_U8] = { .type = NLA_U8 }, - [WPROBE_VAL_U16] = { .type = NLA_U16 }, - [WPROBE_VAL_U32] = { .type = NLA_U32 }, - [WPROBE_VAL_U64] = { .type = NLA_U64 }, - [WPROBE_VAL_SUM] = { .type = NLA_U64 }, - [WPROBE_VAL_SUM_SQ] = { .type = NLA_U64 }, - [WPROBE_VAL_SAMPLES] = { .type = NLA_U32 }, -}; - -static int -error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) -{ - int *ret = arg; - *ret = err->error; - return NL_STOP; -} - -static int -finish_handler(struct nl_msg *msg, void *arg) -{ - int *ret = arg; - *ret = 0; - return NL_SKIP; -} - -static int -ack_handler(struct nl_msg *msg, void *arg) -{ - int *ret = arg; - *ret = 0; - return NL_STOP; -} - - -static void -wprobe_free(void) -{ - /* should not happen */ - if (n_devs == 0) - return; - - if (--n_devs != 0) - return; - - if (cache) - nl_cache_free(cache); - if (handle) - nl_socket_free(handle); - handle = NULL; - cache = NULL; -} - -static int -wprobe_init(void) -{ - int ret; - - if (n_devs++ > 0) - return 0; - - handle = nl_socket_alloc(); - if (!handle) { - DPRINTF("Failed to create handle\n"); - goto err; - } - - if (genl_connect(handle)) { - DPRINTF("Failed to connect to generic netlink\n"); - goto err; - } - - ret = genl_ctrl_alloc_cache(handle, &cache); - if (ret < 0) { - DPRINTF("Failed to allocate netlink cache\n"); - goto err; - } - - family = genl_ctrl_search_by_name(cache, "wprobe"); - if (!family) { - DPRINTF("wprobe API not present\n"); - goto err; - } - return 0; - -err: - wprobe_free(); - return -EINVAL; -} - - -static struct nl_msg * -wprobe_new_msg(const char *ifname, int cmd, bool dump) -{ - struct nl_msg *msg; - uint32_t flags = 0; - - msg = nlmsg_alloc(); - if (!msg) - return NULL; - - if (dump) - flags |= NLM_F_DUMP; - - genlmsg_put(msg, 0, 0, genl_family_get_id(family), - 0, flags, cmd, 0); - - NLA_PUT_STRING(msg, WPROBE_ATTR_INTERFACE, ifname); -nla_put_failure: - return msg; -} - -static int -wprobe_send_msg(struct nl_msg *msg, void *callback, void *arg) -{ - struct nl_cb *cb; - int err = 0; - - cb = nl_cb_alloc(NL_CB_DEFAULT); - if (!cb) - goto out_no_cb; - - if (callback) - nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, callback, arg); - - err = nl_send_auto_complete(handle, msg); - if (err < 0) - goto out; - - err = 1; - - nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err); - nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err); - nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err); - - while (err > 0) - nl_recvmsgs(handle, cb); - -out: - nl_cb_put(cb); -out_no_cb: - nlmsg_free(msg); - return err; -} - -struct wprobe_attr_cb { - struct list_head *list; - char *addr; -}; - -static int -save_attribute_handler(struct nl_msg *msg, void *arg) -{ - struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); - const char *name = "N/A"; - struct wprobe_attribute *attr; - int type = 0; - struct wprobe_attr_cb *cb = arg; - - nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0), - genlmsg_attrlen(gnlh, 0), attribute_policy); - - if (tb[WPROBE_ATTR_NAME]) - name = nla_data(tb[WPROBE_ATTR_NAME]); - - attr = malloc(sizeof(struct wprobe_attribute) + strlen(name) + 1); - if (!attr) - return -1; - - memset(attr, 0, sizeof(struct wprobe_attribute)); - - if (tb[WPROBE_ATTR_ID]) - attr->id = nla_get_u32(tb[WPROBE_ATTR_ID]); - - if (tb[WPROBE_ATTR_MAC] && cb->addr) - memcpy(cb->addr, nla_data(tb[WPROBE_ATTR_MAC]), 6); - - if (tb[WPROBE_ATTR_FLAGS]) - attr->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]); - - if (tb[WPROBE_ATTR_TYPE]) - type = nla_get_u8(tb[WPROBE_ATTR_TYPE]); - - if ((type < WPROBE_VAL_STRING) || - (type > WPROBE_VAL_U64)) - type = 0; - - attr->type = type; - strcpy(attr->name, name); - INIT_LIST_HEAD(&attr->list); - list_add(&attr->list, cb->list); - return 0; -} - - -static int -dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr) -{ - struct nl_msg *msg; - struct wprobe_attr_cb cb; - - cb.list = list; - cb.addr = addr; - msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_LIST, true); - if (!msg) - return -ENOMEM; - - if (link) - NLA_PUT(msg, WPROBE_ATTR_MAC, 6, "\x00\x00\x00\x00\x00\x00"); - - return wprobe_send_msg(msg, save_attribute_handler, &cb); - -nla_put_failure: - nlmsg_free(msg); - return -EINVAL; -} - -struct wprobe_iface * -wprobe_get_dev(const char *ifname) -{ - struct wprobe_iface *dev; - - if (wprobe_init() != 0) - return NULL; - - dev = malloc(sizeof(struct wprobe_iface)); - if (!dev) - return NULL; - - memset(dev, 0, sizeof(struct wprobe_iface)); - dev->ifname = strdup(ifname); - if (!dev->ifname) - goto error; - - dev->interval = -1; - dev->scale_min = -1; - dev->scale_max = -1; - dev->scale_m = -1; - dev->scale_d = -1; - - INIT_LIST_HEAD(&dev->global_attr); - INIT_LIST_HEAD(&dev->link_attr); - INIT_LIST_HEAD(&dev->links); - - dump_attributes(ifname, false, &dev->global_attr, NULL); - dump_attributes(ifname, true, &dev->link_attr, NULL); - - return dev; - -error: - free(dev); - return NULL; -} - -static void -free_attr_list(struct list_head *list) -{ - struct wprobe_attribute *attr, *tmp; - - list_for_each_entry_safe(attr, tmp, list, list) { - list_del(&attr->list); - free(attr); - } -} - -void -wprobe_free_dev(struct wprobe_iface *dev) -{ - wprobe_free(); - free_attr_list(&dev->global_attr); - free_attr_list(&dev->link_attr); - free((void *)dev->ifname); - free(dev); -} - -static struct wprobe_link * -get_link(struct list_head *list, const char *addr) -{ - struct wprobe_link *l; - - list_for_each_entry(l, list, list) { - if (!memcmp(l->addr, addr, 6)) { - list_del_init(&l->list); - goto out; - } - } - - /* no previous link found, allocate a new one */ - l = malloc(sizeof(struct wprobe_link)); - if (!l) - goto out; - - memset(l, 0, sizeof(struct wprobe_link)); - memcpy(l->addr, addr, sizeof(l->addr)); - INIT_LIST_HEAD(&l->list); - -out: - return l; -} - -struct wprobe_save_cb { - struct list_head *list; - struct list_head old_list; -}; - -static int -save_link_handler(struct nl_msg *msg, void *arg) -{ - struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); - struct wprobe_link *link; - struct wprobe_save_cb *cb = arg; - const char *addr; - - nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0), - genlmsg_attrlen(gnlh, 0), attribute_policy); - - if (!tb[WPROBE_ATTR_MAC] || (nla_len(tb[WPROBE_ATTR_MAC]) != 6)) - return -1; - - addr = nla_data(tb[WPROBE_ATTR_MAC]); - link = get_link(&cb->old_list, addr); - if (!link) - return -1; - - if (tb[WPROBE_ATTR_FLAGS]) - link->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]); - - list_add_tail(&link->list, cb->list); - return 0; -} - - -int -wprobe_update_links(struct wprobe_iface *dev) -{ - struct wprobe_link *l, *tmp; - struct nl_msg *msg; - struct wprobe_save_cb cb; - int err; - - INIT_LIST_HEAD(&cb.old_list); - list_splice_init(&dev->links, &cb.old_list); - cb.list = &dev->links; - - msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_GET_LINKS, true); - if (!msg) - return -ENOMEM; - - err = wprobe_send_msg(msg, save_link_handler, &cb); - if (err < 0) - return err; - - list_for_each_entry_safe(l, tmp, &cb.old_list, list) { - list_del(&l->list); - free(l); - } - - return 0; -} - -int -wprobe_apply_config(struct wprobe_iface *dev) -{ - struct nl_msg *msg; - - msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_CONFIG, false); - if (!msg) - return -ENOMEM; - - if (dev->interval >= 0) - NLA_PUT_MSECS(msg, WPROBE_ATTR_INTERVAL, dev->interval); - - wprobe_send_msg(msg, NULL, NULL); - return 0; - -nla_put_failure: - nlmsg_free(msg); - return -ENOMEM; -} - -int -wprobe_measure(struct wprobe_iface *dev) -{ - struct nl_msg *msg; - - msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_MEASURE, false); - if (!msg) - return -ENOMEM; - - wprobe_send_msg(msg, NULL, NULL); - return 0; -} - -struct wprobe_request_cb { - struct list_head *list; - struct list_head old_list; - char *addr; -}; - -static int -save_attrdata_handler(struct nl_msg *msg, void *arg) -{ - struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); - struct wprobe_request_cb *cb = arg; - struct wprobe_attribute *attr; - int type, id; - - nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0), - genlmsg_attrlen(gnlh, 0), attribute_policy); - - if (!tb[WPROBE_ATTR_ID]) - return -1; - - if (!tb[WPROBE_ATTR_TYPE]) - return -1; - - id = nla_get_u32(tb[WPROBE_ATTR_ID]); - list_for_each_entry(attr, &cb->old_list, list) { - if (attr->id == id) - goto found; - } - /* not found */ - return -1; - -found: - list_del_init(&attr->list); - - type = nla_get_u8(tb[WPROBE_ATTR_TYPE]); - if (type != attr->type) { - DPRINTF("WARNING: type mismatch for %s attribute '%s' (%d != %d)\n", - (cb->addr ? "link" : "global"), - attr->name, - type, attr->type); - goto out; - } - - if ((type < WPROBE_VAL_STRING) || - (type > WPROBE_VAL_U64)) - goto out; - - memset(&attr->val, 0, sizeof(attr->val)); - -#define HANDLE_INT_TYPE(_idx, _type) \ - case WPROBE_VAL_S##_type: \ - case WPROBE_VAL_U##_type: \ - attr->val.U##_type = nla_get_u##_type(tb[_idx]); \ - break - - switch(type) { - HANDLE_INT_TYPE(type, 8); - HANDLE_INT_TYPE(type, 16); - HANDLE_INT_TYPE(type, 32); - HANDLE_INT_TYPE(type, 64); - case WPROBE_VAL_STRING: - /* unimplemented */ - break; - } -#undef HANDLE_TYPE - - if (attr->flags & WPROBE_F_KEEPSTAT) { - if (tb[WPROBE_VAL_SUM]) - attr->val.s = nla_get_u64(tb[WPROBE_VAL_SUM]); - - if (tb[WPROBE_VAL_SUM_SQ]) - attr->val.ss = nla_get_u64(tb[WPROBE_VAL_SUM_SQ]); - - if (tb[WPROBE_VAL_SAMPLES]) - attr->val.n = nla_get_u32(tb[WPROBE_VAL_SAMPLES]); - - if (attr->val.n > 0) { - float avg = ((float) attr->val.s) / attr->val.n; - float stdev = sqrt((((float) attr->val.ss) / attr->val.n) - (avg * avg)); - if (isnan(stdev)) - stdev = 0.0f; - if (isnan(avg)) - avg = 0.0f; - attr->val.avg = avg; - attr->val.stdev = stdev; - } - } - -out: - list_add_tail(&attr->list, cb->list); - return 0; -} - - -int -wprobe_request_data(struct wprobe_iface *dev, const unsigned char *addr) -{ - struct wprobe_request_cb cb; - struct list_head *attrs; - struct nl_msg *msg; - int err; - - msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_GET_INFO, true); - if (!msg) - return -ENOMEM; - - if (addr) { - attrs = &dev->link_attr; - NLA_PUT(msg, WPROBE_ATTR_MAC, 6, addr); - } else { - attrs = &dev->global_attr; - } - - INIT_LIST_HEAD(&cb.old_list); - list_splice_init(attrs, &cb.old_list); - cb.list = attrs; - - err = wprobe_send_msg(msg, save_attrdata_handler, &cb); - list_splice(&cb.old_list, attrs->prev); - return err; - -nla_put_failure: - nlmsg_free(msg); - return -ENOMEM; -} - - -- cgit v1.2.3