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author | Jo-Philipp Wich <jow@openwrt.org> | 2014-10-27 14:35:44 +0000 |
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committer | Jo-Philipp Wich <jow@openwrt.org> | 2014-10-27 14:35:44 +0000 |
commit | c1baa9448dfc69b29160293c989151b01590f838 (patch) | |
tree | 8349db5bee00e8faa08f008df47735b49373c597 /package/network/utils/iwinfo/src/iwinfo_wext_scan.c | |
parent | 853ef0ecda757fb145ea43b02c4f534301e93352 (diff) | |
download | master-187ad058-c1baa9448dfc69b29160293c989151b01590f838.tar.gz master-187ad058-c1baa9448dfc69b29160293c989151b01590f838.tar.bz2 master-187ad058-c1baa9448dfc69b29160293c989151b01590f838.zip |
iwinfo: switch to external git repo, support lookup by phyname & macaddr
Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43087 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/network/utils/iwinfo/src/iwinfo_wext_scan.c')
-rw-r--r-- | package/network/utils/iwinfo/src/iwinfo_wext_scan.c | 527 |
1 files changed, 0 insertions, 527 deletions
diff --git a/package/network/utils/iwinfo/src/iwinfo_wext_scan.c b/package/network/utils/iwinfo/src/iwinfo_wext_scan.c deleted file mode 100644 index a06672147f..0000000000 --- a/package/network/utils/iwinfo/src/iwinfo_wext_scan.c +++ /dev/null @@ -1,527 +0,0 @@ -/* - * iwinfo - Wireless Information Library - Linux Wireless Extension Backend - * - * Copyright (C) 2009-2010 Jo-Philipp Wich <xm@subsignal.org> - * - * The iwinfo library is free software: you can redistribute it and/or - * modify it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * The iwinfo library 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. - * - * You should have received a copy of the GNU General Public License along - * with the iwinfo library. If not, see http://www.gnu.org/licenses/. - * - * Parts of this code are derived from the Linux wireless tools, iwlib.c, - * iwlist.c and iwconfig.c in particular. - */ - -#include "iwinfo.h" -#include "iwinfo_wext.h" - - -static int wext_ioctl(const char *ifname, int cmd, struct iwreq *wrq) -{ - strncpy(wrq->ifr_name, ifname, IFNAMSIZ); - return iwinfo_ioctl(cmd, wrq); -} - -static inline double wext_freq2float(const struct iw_freq *in) -{ - int i; - double res = (double) in->m; - for(i = 0; i < in->e; i++) res *= 10; - return res; -} - -static inline int wext_extract_event(struct stream_descr *stream, struct iw_event *iwe, int wev) -{ - const struct iw_ioctl_description *descr = NULL; - int event_type = 0; - unsigned int event_len = 1; - char *pointer; - unsigned cmd_index; /* *MUST* be unsigned */ - - /* Check for end of stream */ - if((stream->current + IW_EV_LCP_PK_LEN) > stream->end) - return 0; - - /* Extract the event header (to get the event id). - * Note : the event may be unaligned, therefore copy... */ - memcpy((char *) iwe, stream->current, IW_EV_LCP_PK_LEN); - - /* Check invalid events */ - if(iwe->len <= IW_EV_LCP_PK_LEN) - return -1; - - /* Get the type and length of that event */ - if(iwe->cmd <= SIOCIWLAST) - { - cmd_index = iwe->cmd - SIOCIWFIRST; - if(cmd_index < standard_ioctl_num) - descr = &(standard_ioctl_descr[cmd_index]); - } - else - { - cmd_index = iwe->cmd - IWEVFIRST; - if(cmd_index < standard_event_num) - descr = &(standard_event_descr[cmd_index]); - } - - if(descr != NULL) - event_type = descr->header_type; - - /* Unknown events -> event_type=0 => IW_EV_LCP_PK_LEN */ - event_len = event_type_size[event_type]; - - /* Fixup for earlier version of WE */ - if((wev <= 18) && (event_type == IW_HEADER_TYPE_POINT)) - event_len += IW_EV_POINT_OFF; - - /* Check if we know about this event */ - if(event_len <= IW_EV_LCP_PK_LEN) - { - /* Skip to next event */ - stream->current += iwe->len; - return 2; - } - - event_len -= IW_EV_LCP_PK_LEN; - - /* Set pointer on data */ - if(stream->value != NULL) - pointer = stream->value; /* Next value in event */ - else - pointer = stream->current + IW_EV_LCP_PK_LEN; /* First value in event */ - - /* Copy the rest of the event (at least, fixed part) */ - if((pointer + event_len) > stream->end) - { - /* Go to next event */ - stream->current += iwe->len; - return -2; - } - - /* Fixup for WE-19 and later : pointer no longer in the stream */ - /* Beware of alignement. Dest has local alignement, not packed */ - if( (wev > 18) && (event_type == IW_HEADER_TYPE_POINT) ) - memcpy((char *) iwe + IW_EV_LCP_LEN + IW_EV_POINT_OFF, pointer, event_len); - else - memcpy((char *) iwe + IW_EV_LCP_LEN, pointer, event_len); - - /* Skip event in the stream */ - pointer += event_len; - - /* Special processing for iw_point events */ - if(event_type == IW_HEADER_TYPE_POINT) - { - /* Check the length of the payload */ - unsigned int extra_len = iwe->len - (event_len + IW_EV_LCP_PK_LEN); - if(extra_len > 0) - { - /* Set pointer on variable part (warning : non aligned) */ - iwe->u.data.pointer = pointer; - - /* Check that we have a descriptor for the command */ - if(descr == NULL) - /* Can't check payload -> unsafe... */ - iwe->u.data.pointer = NULL; /* Discard paylod */ - else - { - /* Those checks are actually pretty hard to trigger, - * because of the checks done in the kernel... */ - - unsigned int token_len = iwe->u.data.length * descr->token_size; - - /* Ugly fixup for alignement issues. - * If the kernel is 64 bits and userspace 32 bits, - * we have an extra 4+4 bytes. - * Fixing that in the kernel would break 64 bits userspace. */ - if((token_len != extra_len) && (extra_len >= 4)) - { - uint16_t alt_dlen = *((uint16_t *) pointer); - unsigned int alt_token_len = alt_dlen * descr->token_size; - if((alt_token_len + 8) == extra_len) - { - /* Ok, let's redo everything */ - pointer -= event_len; - pointer += 4; - /* Dest has local alignement, not packed */ - memcpy((char *) iwe + IW_EV_LCP_LEN + IW_EV_POINT_OFF, pointer, event_len); - pointer += event_len + 4; - iwe->u.data.pointer = pointer; - token_len = alt_token_len; - } - } - - /* Discard bogus events which advertise more tokens than - * what they carry... */ - if(token_len > extra_len) - iwe->u.data.pointer = NULL; /* Discard paylod */ - - /* Check that the advertised token size is not going to - * produce buffer overflow to our caller... */ - if((iwe->u.data.length > descr->max_tokens) - && !(descr->flags & IW_DESCR_FLAG_NOMAX)) - iwe->u.data.pointer = NULL; /* Discard paylod */ - - /* Same for underflows... */ - if(iwe->u.data.length < descr->min_tokens) - iwe->u.data.pointer = NULL; /* Discard paylod */ - } - } - else - /* No data */ - iwe->u.data.pointer = NULL; - - /* Go to next event */ - stream->current += iwe->len; - } - else - { - /* Ugly fixup for alignement issues. - * If the kernel is 64 bits and userspace 32 bits, - * we have an extra 4 bytes. - * Fixing that in the kernel would break 64 bits userspace. */ - if((stream->value == NULL) - && ((((iwe->len - IW_EV_LCP_PK_LEN) % event_len) == 4) - || ((iwe->len == 12) && ((event_type == IW_HEADER_TYPE_UINT) || - (event_type == IW_HEADER_TYPE_QUAL))) )) - { - pointer -= event_len; - pointer += 4; - /* Beware of alignement. Dest has local alignement, not packed */ - memcpy((char *) iwe + IW_EV_LCP_LEN, pointer, event_len); - pointer += event_len; - } - - /* Is there more value in the event ? */ - if((pointer + event_len) <= (stream->current + iwe->len)) - /* Go to next value */ - stream->value = pointer; - else - { - /* Go to next event */ - stream->value = NULL; - stream->current += iwe->len; - } - } - - return 1; -} - -static inline void wext_fill_wpa(unsigned char *iebuf, int ielen, struct iwinfo_scanlist_entry *e) -{ - static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; - - while (ielen >= 2 && ielen >= iebuf[1]) - { - switch (iebuf[0]) - { - case 48: /* RSN */ - iwinfo_parse_rsn(&e->crypto, iebuf + 2, iebuf[1], - IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x); - break; - - case 221: /* Vendor */ - if (iebuf[1] >= 4 && !memcmp(iebuf + 2, ms_oui, 3) && iebuf[5] == 1) - iwinfo_parse_rsn(&e->crypto, iebuf + 6, iebuf[1] - 4, - IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK); - break; - } - - ielen -= iebuf[1] + 2; - iebuf += iebuf[1] + 2; - } -} - - -static inline void wext_fill_entry(struct stream_descr *stream, struct iw_event *event, - struct iw_range *iw_range, int has_range, struct iwinfo_scanlist_entry *e) -{ - int i; - double freq; - - /* Now, let's decode the event */ - switch(event->cmd) - { - case SIOCGIWAP: - memcpy(e->mac, &event->u.ap_addr.sa_data, 6); - break; - - case SIOCGIWFREQ: - if( event->u.freq.m >= 1000 ) - { - freq = wext_freq2float(&(event->u.freq)); - - for(i = 0; i < iw_range->num_frequency; i++) - { - if( wext_freq2float(&iw_range->freq[i]) == freq ) - { - e->channel = iw_range->freq[i].i; - break; - } - } - } - else - { - e->channel = event->u.freq.m; - } - - break; - - case SIOCGIWMODE: - switch(event->u.mode) - { - case 1: - e->mode = IWINFO_OPMODE_ADHOC; - break; - - case 2: - case 3: - e->mode = IWINFO_OPMODE_MASTER; - break; - - default: - e->mode = IWINFO_OPMODE_UNKNOWN; - break; - } - - break; - - case SIOCGIWESSID: - if( event->u.essid.pointer && event->u.essid.length && event->u.essid.flags ) - memcpy(e->ssid, event->u.essid.pointer, event->u.essid.length); - - break; - - case SIOCGIWENCODE: - e->crypto.enabled = !(event->u.data.flags & IW_ENCODE_DISABLED); - break; - - case IWEVQUAL: - e->signal = event->u.qual.level; - e->quality = event->u.qual.qual; - e->quality_max = iw_range->max_qual.qual; - break; -#if 0 - case SIOCGIWRATE: - if(state->val_index == 0) - { - lua_pushstring(L, "bitrates"); - lua_newtable(L); - } - //iw_print_bitrate(buffer, sizeof(buffer), event->u.bitrate.value); - snprintf(buffer, sizeof(buffer), "%d", event->u.bitrate.value); - lua_pushinteger(L, state->val_index + 1); - lua_pushstring(L, buffer); - lua_settable(L, -3); - - /* Check for termination */ - if(stream->value == NULL) - { - lua_settable(L, -3); - state->val_index = 0; - } else - state->val_index++; - break; -#endif - case IWEVGENIE: - wext_fill_wpa(event->u.data.pointer, event->u.data.length, e); - break; - } -} - - -int wext_get_scanlist(const char *ifname, char *buf, int *len) -{ - struct iwreq wrq; - struct iw_scan_req scanopt; /* Options for 'set' */ - unsigned char *buffer = NULL; /* Results */ - int buflen = IW_SCAN_MAX_DATA; /* Min for compat WE<17 */ - struct iw_range range; - int has_range = 1; - struct timeval tv; /* Select timeout */ - int timeout = 15000000; /* 15s */ - - int entrylen = 0; - struct iwinfo_scanlist_entry e; - - wrq.u.data.pointer = (caddr_t) ⦥ - wrq.u.data.length = sizeof(struct iw_range); - wrq.u.data.flags = 0; - - if( wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0 ) - { - /* Init timeout value -> 250ms between set and first get */ - tv.tv_sec = 0; - tv.tv_usec = 250000; - - /* Clean up set args */ - memset(&scanopt, 0, sizeof(scanopt)); - - wrq.u.data.pointer = NULL; - wrq.u.data.flags = 0; - wrq.u.data.length = 0; - - /* Initiate Scanning */ - if( wext_ioctl(ifname, SIOCSIWSCAN, &wrq) >= 0 ) - { - timeout -= tv.tv_usec; - - /* Forever */ - while(1) - { - fd_set rfds; /* File descriptors for select */ - int last_fd; /* Last fd */ - int ret; - - /* Guess what ? We must re-generate rfds each time */ - FD_ZERO(&rfds); - last_fd = -1; - /* In here, add the rtnetlink fd in the list */ - - /* Wait until something happens */ - ret = select(last_fd + 1, &rfds, NULL, NULL, &tv); - - /* Check if there was an error */ - if(ret < 0) - { - if(errno == EAGAIN || errno == EINTR) - continue; - - return -1; - } - - /* Check if there was a timeout */ - if(ret == 0) - { - unsigned char *newbuf; - - realloc: - /* (Re)allocate the buffer - realloc(NULL, len) == malloc(len) */ - newbuf = realloc(buffer, buflen); - if(newbuf == NULL) - { - if(buffer) - free(buffer); - - return -1; - } - - buffer = newbuf; - - /* Try to read the results */ - wrq.u.data.pointer = buffer; - wrq.u.data.flags = 0; - wrq.u.data.length = buflen; - - if( wext_ioctl(ifname, SIOCGIWSCAN, &wrq) ) - { - /* Check if buffer was too small (WE-17 only) */ - if((errno == E2BIG) && (range.we_version_compiled > 16)) - { - /* Some driver may return very large scan results, either - * because there are many cells, or because they have many - * large elements in cells (like IWEVCUSTOM). Most will - * only need the regular sized buffer. We now use a dynamic - * allocation of the buffer to satisfy everybody. Of course, - * as we don't know in advance the size of the array, we try - * various increasing sizes. Jean II */ - - /* Check if the driver gave us any hints. */ - if(wrq.u.data.length > buflen) - buflen = wrq.u.data.length; - else - buflen *= 2; - - /* Try again */ - goto realloc; - } - - /* Check if results not available yet */ - if(errno == EAGAIN) - { - /* Restart timer for only 100ms*/ - tv.tv_sec = 0; - tv.tv_usec = 100000; - timeout -= tv.tv_usec; - - if(timeout > 0) - continue; /* Try again later */ - } - - /* Bad error */ - free(buffer); - return -1; - - } else { - /* We have the results, go to process them */ - break; - } - } - } - - if( wrq.u.data.length ) - { - struct iw_event iwe; - struct stream_descr stream; - int ret; - int first = 1; - - memset(&stream, 0, sizeof(stream)); - stream.current = (char *)buffer; - stream.end = (char *)buffer + wrq.u.data.length; - - do - { - /* Extract an event and print it */ - ret = wext_extract_event(&stream, &iwe, range.we_version_compiled); - - if(ret >= 0) - { - if( (iwe.cmd == SIOCGIWAP) || (ret == 0) ) - { - if( first ) - { - first = 0; - } - else if( (entrylen + sizeof(struct iwinfo_scanlist_entry)) <= IWINFO_BUFSIZE ) - { - /* if encryption is off, clear the crypto strunct */ - if( !e.crypto.enabled ) - memset(&e.crypto, 0, sizeof(struct iwinfo_crypto_entry)); - - memcpy(&buf[entrylen], &e, sizeof(struct iwinfo_scanlist_entry)); - entrylen += sizeof(struct iwinfo_scanlist_entry); - } - else - { - /* we exceed the callers buffer size, abort here ... */ - break; - } - - memset(&e, 0, sizeof(struct iwinfo_scanlist_entry)); - } - - wext_fill_entry(&stream, &iwe, &range, has_range, &e); - } - - } while(ret > 0); - - free(buffer); - *len = entrylen; - return 0; - } - - *len = 0; - free(buffer); - return 0; - } - } - - return -1; -} |