+++ /dev/null
-/*
- * UPnP SSDP for WPS
- * Copyright (c) 2000-2003 Intel Corporation
- * Copyright (c) 2006-2007 Sony Corporation
- * Copyright (c) 2008-2009 Atheros Communications
- * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
- *
- * See wps_upnp.c for more details on licensing and code history.
- */
-
-#include "includes.h"
-
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <net/route.h>
-
-#include "common.h"
-#include "uuid.h"
-#include "eloop.h"
-#include "wps.h"
-#include "wps_upnp.h"
-#include "wps_upnp_i.h"
-
-#define UPNP_CACHE_SEC (UPNP_CACHE_SEC_MIN + 1) /* cache time we use */
-#define UPNP_CACHE_SEC_MIN 1800 /* min cachable time per UPnP standard */
-#define UPNP_ADVERTISE_REPEAT 2 /* no more than 3 */
-#define MAX_MSEARCH 20 /* max simultaneous M-SEARCH replies ongoing */
-#define SSDP_TARGET "239.0.0.0"
-#define SSDP_NETMASK "255.0.0.0"
-
-
-/* Check tokens for equality, where tokens consist of letters, digits,
- * underscore and hyphen, and are matched case insensitive.
- */
-static int token_eq(const char *s1, const char *s2)
-{
- int c1;
- int c2;
- int end1 = 0;
- int end2 = 0;
- for (;;) {
- c1 = *s1++;
- c2 = *s2++;
- if (isalpha(c1) && isupper(c1))
- c1 = tolower(c1);
- if (isalpha(c2) && isupper(c2))
- c2 = tolower(c2);
- end1 = !(isalnum(c1) || c1 == '_' || c1 == '-');
- end2 = !(isalnum(c2) || c2 == '_' || c2 == '-');
- if (end1 || end2 || c1 != c2)
- break;
- }
- return end1 && end2; /* reached end of both words? */
-}
-
-
-/* Return length of token (see above for definition of token) */
-static int token_length(const char *s)
-{
- const char *begin = s;
- for (;; s++) {
- int c = *s;
- int end = !(isalnum(c) || c == '_' || c == '-');
- if (end)
- break;
- }
- return s - begin;
-}
-
-
-/* return length of interword separation.
- * This accepts only spaces/tabs and thus will not traverse a line
- * or buffer ending.
- */
-static int word_separation_length(const char *s)
-{
- const char *begin = s;
- for (;; s++) {
- int c = *s;
- if (c == ' ' || c == '\t')
- continue;
- break;
- }
- return s - begin;
-}
-
-
-/* No. of chars through (including) end of line */
-static int line_length(const char *l)
-{
- const char *lp = l;
- while (*lp && *lp != '\n')
- lp++;
- if (*lp == '\n')
- lp++;
- return lp - l;
-}
-
-
-/* No. of chars excluding trailing whitespace */
-static int line_length_stripped(const char *l)
-{
- const char *lp = l + line_length(l);
- while (lp > l && !isgraph(lp[-1]))
- lp--;
- return lp - l;
-}
-
-
-static int str_starts(const char *str, const char *start)
-{
- return os_strncmp(str, start, os_strlen(start)) == 0;
-}
-
-
-/***************************************************************************
- * Advertisements.
- * These are multicast to the world to tell them we are here.
- * The individual packets are spread out in time to limit loss,
- * and then after a much longer period of time the whole sequence
- * is repeated again (for NOTIFYs only).
- **************************************************************************/
-
-/**
- * next_advertisement - Build next message and advance the state machine
- * @a: Advertisement state
- * @islast: Buffer for indicating whether this is the last message (= 1)
- * Returns: The new message (caller is responsible for freeing this)
- *
- * Note: next_advertisement is shared code with msearchreply_* functions
- */
-static struct wpabuf *
-next_advertisement(struct upnp_wps_device_sm *sm,
- struct advertisement_state_machine *a, int *islast)
-{
- struct wpabuf *msg;
- char *NTString = "";
- char uuid_string[80];
-
- *islast = 0;
- uuid_bin2str(sm->wps->uuid, uuid_string, sizeof(uuid_string));
- msg = wpabuf_alloc(800); /* more than big enough */
- if (msg == NULL)
- goto fail;
- switch (a->type) {
- case ADVERTISE_UP:
- case ADVERTISE_DOWN:
- NTString = "NT";
- wpabuf_put_str(msg, "NOTIFY * HTTP/1.1\r\n");
- wpabuf_printf(msg, "HOST: %s:%d\r\n",
- UPNP_MULTICAST_ADDRESS, UPNP_MULTICAST_PORT);
- wpabuf_printf(msg, "CACHE-CONTROL: max-age=%d\r\n",
- UPNP_CACHE_SEC);
- wpabuf_printf(msg, "NTS: %s\r\n",
- (a->type == ADVERTISE_UP ?
- "ssdp:alive" : "ssdp:byebye"));
- break;
- case MSEARCH_REPLY:
- NTString = "ST";
- wpabuf_put_str(msg, "HTTP/1.1 200 OK\r\n");
- wpabuf_printf(msg, "CACHE-CONTROL: max-age=%d\r\n",
- UPNP_CACHE_SEC);
-
- wpabuf_put_str(msg, "DATE: ");
- format_date(msg);
- wpabuf_put_str(msg, "\r\n");
-
- wpabuf_put_str(msg, "EXT:\r\n");
- break;
- }
-
- if (a->type != ADVERTISE_DOWN) {
- /* Where others may get our XML files from */
- wpabuf_printf(msg, "LOCATION: http://%s:%d/%s\r\n",
- sm->ip_addr_text, sm->web_port,
- UPNP_WPS_DEVICE_XML_FILE);
- }
-
- /* The SERVER line has three comma-separated fields:
- * operating system / version
- * upnp version
- * software package / version
- * However, only the UPnP version is really required, the
- * others can be place holders... for security reasons
- * it is better to NOT provide extra information.
- */
- wpabuf_put_str(msg, "SERVER: Unspecified, UPnP/1.0, Unspecified\r\n");
-
- switch (a->state / UPNP_ADVERTISE_REPEAT) {
- case 0:
- wpabuf_printf(msg, "%s: upnp:rootdevice\r\n", NTString);
- wpabuf_printf(msg, "USN: uuid:%s::upnp:rootdevice\r\n",
- uuid_string);
- break;
- case 1:
- wpabuf_printf(msg, "%s: uuid:%s\r\n", NTString, uuid_string);
- wpabuf_printf(msg, "USN: uuid:%s\r\n", uuid_string);
- break;
- case 2:
- wpabuf_printf(msg, "%s: urn:schemas-wifialliance-org:device:"
- "WFADevice:1\r\n", NTString);
- wpabuf_printf(msg, "USN: uuid:%s::urn:schemas-wifialliance-"
- "org:device:WFADevice:1\r\n", uuid_string);
- break;
- case 3:
- wpabuf_printf(msg, "%s: urn:schemas-wifialliance-org:service:"
- "WFAWLANConfig:1\r\n", NTString);
- wpabuf_printf(msg, "USN: uuid:%s::urn:schemas-wifialliance-"
- "org:service:WFAWLANConfig:1\r\n", uuid_string);
- break;
- }
- wpabuf_put_str(msg, "\r\n");
-
- if (a->state + 1 >= 4 * UPNP_ADVERTISE_REPEAT)
- *islast = 1;
-
- return msg;
-
-fail:
- wpabuf_free(msg);
- return NULL;
-}
-
-
-static void advertisement_state_machine_handler(void *eloop_data,
- void *user_ctx);
-
-
-/**
- * advertisement_state_machine_stop - Stop SSDP advertisements
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * @send_byebye: Send byebye advertisement messages immediately
- */
-void advertisement_state_machine_stop(struct upnp_wps_device_sm *sm,
- int send_byebye)
-{
- struct advertisement_state_machine *a = &sm->advertisement;
- int islast = 0;
- struct wpabuf *msg;
- struct sockaddr_in dest;
-
- eloop_cancel_timeout(advertisement_state_machine_handler, NULL, sm);
- if (!send_byebye || sm->multicast_sd < 0)
- return;
-
- a->type = ADVERTISE_DOWN;
- a->state = 0;
-
- os_memset(&dest, 0, sizeof(dest));
- dest.sin_family = AF_INET;
- dest.sin_addr.s_addr = inet_addr(UPNP_MULTICAST_ADDRESS);
- dest.sin_port = htons(UPNP_MULTICAST_PORT);
-
- while (!islast) {
- msg = next_advertisement(sm, a, &islast);
- if (msg == NULL)
- break;
- if (sendto(sm->multicast_sd, wpabuf_head(msg), wpabuf_len(msg),
- 0, (struct sockaddr *) &dest, sizeof(dest)) < 0) {
- wpa_printf(MSG_INFO, "WPS UPnP: Advertisement sendto "
- "failed: %d (%s)", errno, strerror(errno));
- }
- wpabuf_free(msg);
- a->state++;
- }
-}
-
-
-static void advertisement_state_machine_handler(void *eloop_data,
- void *user_ctx)
-{
- struct upnp_wps_device_sm *sm = user_ctx;
- struct advertisement_state_machine *a = &sm->advertisement;
- struct wpabuf *msg;
- int next_timeout_msec = 100;
- int next_timeout_sec = 0;
- struct sockaddr_in dest;
- int islast = 0;
-
- /*
- * Each is sent twice (in case lost) w/ 100 msec delay between;
- * spec says no more than 3 times.
- * One pair for rootdevice, one pair for uuid, and a pair each for
- * each of the two urns.
- * The entire sequence must be repeated before cache control timeout
- * (which is min 1800 seconds),
- * recommend random portion of half of the advertised cache control age
- * to ensure against loss... perhaps 1800/4 + rand*1800/4 ?
- * Delay random interval < 100 msec prior to initial sending.
- * TTL of 4
- */
-
- wpa_printf(MSG_MSGDUMP, "WPS UPnP: Advertisement state=%d", a->state);
- msg = next_advertisement(sm, a, &islast);
- if (msg == NULL)
- return;
-
- os_memset(&dest, 0, sizeof(dest));
- dest.sin_family = AF_INET;
- dest.sin_addr.s_addr = inet_addr(UPNP_MULTICAST_ADDRESS);
- dest.sin_port = htons(UPNP_MULTICAST_PORT);
-
- if (sendto(sm->multicast_sd, wpabuf_head(msg), wpabuf_len(msg), 0,
- (struct sockaddr *) &dest, sizeof(dest)) == -1) {
- wpa_printf(MSG_ERROR, "WPS UPnP: Advertisement sendto failed:"
- "%d (%s)", errno, strerror(errno));
- next_timeout_msec = 0;
- next_timeout_sec = 10; /* ... later */
- } else if (islast) {
- a->state = 0; /* wrap around */
- if (a->type == ADVERTISE_DOWN) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: ADVERTISE_DOWN->UP");
- a->type = ADVERTISE_UP;
- /* do it all over again right away */
- } else {
- u16 r;
- /*
- * Start over again after a long timeout
- * (see notes above)
- */
- next_timeout_msec = 0;
- os_get_random((void *) &r, sizeof(r));
- next_timeout_sec = UPNP_CACHE_SEC / 4 +
- (((UPNP_CACHE_SEC / 4) * r) >> 16);
- sm->advertise_count++;
- wpa_printf(MSG_DEBUG, "WPS UPnP: ADVERTISE_UP (#%u); "
- "next in %d sec",
- sm->advertise_count, next_timeout_sec);
- }
- } else {
- a->state++;
- }
-
- wpabuf_free(msg);
-
- eloop_register_timeout(next_timeout_sec, next_timeout_msec,
- advertisement_state_machine_handler, NULL, sm);
-}
-
-
-/**
- * advertisement_state_machine_start - Start SSDP advertisements
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * Returns: 0 on success, -1 on failure
- */
-int advertisement_state_machine_start(struct upnp_wps_device_sm *sm)
-{
- struct advertisement_state_machine *a = &sm->advertisement;
- int next_timeout_msec;
-
- advertisement_state_machine_stop(sm, 0);
-
- /*
- * Start out advertising down, this automatically switches
- * to advertising up which signals our restart.
- */
- a->type = ADVERTISE_DOWN;
- a->state = 0;
- /* (other fields not used here) */
-
- /* First timeout should be random interval < 100 msec */
- next_timeout_msec = (100 * (os_random() & 0xFF)) >> 8;
- return eloop_register_timeout(0, next_timeout_msec,
- advertisement_state_machine_handler,
- NULL, sm);
-}
-
-
-/***************************************************************************
- * M-SEARCH replies
- * These are very similar to the multicast advertisements, with some
- * small changes in data content; and they are sent (UDP) to a specific
- * unicast address instead of multicast.
- * They are sent in response to a UDP M-SEARCH packet.
- **************************************************************************/
-
-/**
- * msearchreply_state_machine_stop - Stop M-SEARCH reply state machine
- * @a: Selected advertisement/reply state
- */
-void msearchreply_state_machine_stop(struct advertisement_state_machine *a)
-{
- wpa_printf(MSG_DEBUG, "WPS UPnP: M-SEARCH stop");
- dl_list_del(&a->list);
- os_free(a);
-}
-
-
-static void msearchreply_state_machine_handler(void *eloop_data,
- void *user_ctx)
-{
- struct advertisement_state_machine *a = user_ctx;
- struct upnp_wps_device_sm *sm = eloop_data;
- struct wpabuf *msg;
- int next_timeout_msec = 100;
- int next_timeout_sec = 0;
- int islast = 0;
-
- /*
- * Each response is sent twice (in case lost) w/ 100 msec delay
- * between; spec says no more than 3 times.
- * One pair for rootdevice, one pair for uuid, and a pair each for
- * each of the two urns.
- */
-
- /* TODO: should only send the requested response types */
-
- wpa_printf(MSG_MSGDUMP, "WPS UPnP: M-SEARCH reply state=%d (%s:%d)",
- a->state, inet_ntoa(a->client.sin_addr),
- ntohs(a->client.sin_port));
- msg = next_advertisement(sm, a, &islast);
- if (msg == NULL)
- return;
-
- /*
- * Send it on the multicast socket to avoid having to set up another
- * socket.
- */
- if (sendto(sm->multicast_sd, wpabuf_head(msg), wpabuf_len(msg), 0,
- (struct sockaddr *) &a->client, sizeof(a->client)) < 0) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: M-SEARCH reply sendto "
- "errno %d (%s) for %s:%d",
- errno, strerror(errno),
- inet_ntoa(a->client.sin_addr),
- ntohs(a->client.sin_port));
- /* Ignore error and hope for the best */
- }
- wpabuf_free(msg);
- if (islast) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: M-SEARCH reply done");
- msearchreply_state_machine_stop(a);
- return;
- }
- a->state++;
-
- wpa_printf(MSG_MSGDUMP, "WPS UPnP: M-SEARCH reply in %d.%03d sec",
- next_timeout_sec, next_timeout_msec);
- eloop_register_timeout(next_timeout_sec, next_timeout_msec,
- msearchreply_state_machine_handler, sm, a);
-}
-
-
-/**
- * msearchreply_state_machine_start - Reply to M-SEARCH discovery request
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * @client: Client address
- * @mx: Maximum delay in seconds
- *
- * Use TTL of 4 (this was done when socket set up).
- * A response should be given in randomized portion of min(MX,120) seconds
- *
- * UPnP-arch-DeviceArchitecture, 1.2.3:
- * To be found, a device must send a UDP response to the source IP address and
- * port that sent the request to the multicast channel. Devices respond if the
- * ST header of the M-SEARCH request is "ssdp:all", "upnp:rootdevice", "uuid:"
- * followed by a UUID that exactly matches one advertised by the device.
- */
-static void msearchreply_state_machine_start(struct upnp_wps_device_sm *sm,
- struct sockaddr_in *client,
- int mx)
-{
- struct advertisement_state_machine *a;
- int next_timeout_sec;
- int next_timeout_msec;
- int replies;
-
- replies = dl_list_len(&sm->msearch_replies);
- wpa_printf(MSG_DEBUG, "WPS UPnP: M-SEARCH reply start (%d "
- "outstanding)", replies);
- if (replies >= MAX_MSEARCH) {
- wpa_printf(MSG_INFO, "WPS UPnP: Too many outstanding "
- "M-SEARCH replies");
- return;
- }
-
- a = os_zalloc(sizeof(*a));
- if (a == NULL)
- return;
- a->type = MSEARCH_REPLY;
- a->state = 0;
- os_memcpy(&a->client, client, sizeof(*client));
- /* Wait time depending on MX value */
- next_timeout_msec = (1000 * mx * (os_random() & 0xFF)) >> 8;
- next_timeout_sec = next_timeout_msec / 1000;
- next_timeout_msec = next_timeout_msec % 1000;
- if (eloop_register_timeout(next_timeout_sec, next_timeout_msec,
- msearchreply_state_machine_handler, sm,
- a)) {
- /* No way to recover (from malloc failure) */
- goto fail;
- }
- /* Remember for future cleanup */
- dl_list_add(&sm->msearch_replies, &a->list);
- return;
-
-fail:
- wpa_printf(MSG_INFO, "WPS UPnP: M-SEARCH reply failure!");
- eloop_cancel_timeout(msearchreply_state_machine_handler, sm, a);
- os_free(a);
-}
-
-
-/**
- * ssdp_parse_msearch - Process a received M-SEARCH
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * @client: Client address
- * @data: NULL terminated M-SEARCH message
- *
- * Given that we have received a header w/ M-SEARCH, act upon it
- *
- * Format of M-SEARCH (case insensitive!):
- *
- * First line must be:
- * M-SEARCH * HTTP/1.1
- * Other lines in arbitrary order:
- * HOST:239.255.255.250:1900
- * ST:<varies -- must match>
- * MAN:"ssdp:discover"
- * MX:<varies>
- *
- * It should be noted that when Microsoft Vista is still learning its IP
- * address, it sends out host lines like: HOST:[FF02::C]:1900
- */
-static void ssdp_parse_msearch(struct upnp_wps_device_sm *sm,
- struct sockaddr_in *client, const char *data)
-{
-#ifndef CONFIG_NO_STDOUT_DEBUG
- const char *start = data;
-#endif /* CONFIG_NO_STDOUT_DEBUG */
- const char *end;
- int got_host = 0;
- int got_st = 0, st_match = 0;
- int got_man = 0;
- int got_mx = 0;
- int mx = 0;
-
- /*
- * Skip first line M-SEARCH * HTTP/1.1
- * (perhaps we should check remainder of the line for syntax)
- */
- data += line_length(data);
-
- /* Parse remaining lines */
- for (; *data != '\0'; data += line_length(data)) {
- end = data + line_length_stripped(data);
- if (token_eq(data, "host")) {
- /* The host line indicates who the packet
- * is addressed to... but do we really care?
- * Note that Microsoft sometimes does funny
- * stuff with the HOST: line.
- */
-#if 0 /* could be */
- data += token_length(data);
- data += word_separation_length(data);
- if (*data != ':')
- goto bad;
- data++;
- data += word_separation_length(data);
- /* UPNP_MULTICAST_ADDRESS */
- if (!str_starts(data, "239.255.255.250"))
- goto bad;
- data += os_strlen("239.255.255.250");
- if (*data == ':') {
- if (!str_starts(data, ":1900"))
- goto bad;
- }
-#endif /* could be */
- got_host = 1;
- continue;
- } else if (token_eq(data, "st")) {
- /* There are a number of forms; we look
- * for one that matches our case.
- */
- got_st = 1;
- data += token_length(data);
- data += word_separation_length(data);
- if (*data != ':')
- continue;
- data++;
- data += word_separation_length(data);
- if (str_starts(data, "ssdp:all")) {
- st_match = 1;
- continue;
- }
- if (str_starts(data, "upnp:rootdevice")) {
- st_match = 1;
- continue;
- }
- if (str_starts(data, "uuid:")) {
- char uuid_string[80];
- data += os_strlen("uuid:");
- uuid_bin2str(sm->wps->uuid, uuid_string,
- sizeof(uuid_string));
- if (str_starts(data, uuid_string))
- st_match = 1;
- continue;
- }
-#if 0
- /* FIX: should we really reply to IGD string? */
- if (str_starts(data, "urn:schemas-upnp-org:device:"
- "InternetGatewayDevice:1")) {
- st_match = 1;
- continue;
- }
-#endif
- if (str_starts(data, "urn:schemas-wifialliance-org:"
- "service:WFAWLANConfig:1")) {
- st_match = 1;
- continue;
- }
- if (str_starts(data, "urn:schemas-wifialliance-org:"
- "device:WFADevice:1")) {
- st_match = 1;
- continue;
- }
- continue;
- } else if (token_eq(data, "man")) {
- data += token_length(data);
- data += word_separation_length(data);
- if (*data != ':')
- continue;
- data++;
- data += word_separation_length(data);
- if (!str_starts(data, "\"ssdp:discover\"")) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: Unexpected "
- "M-SEARCH man-field");
- goto bad;
- }
- got_man = 1;
- continue;
- } else if (token_eq(data, "mx")) {
- data += token_length(data);
- data += word_separation_length(data);
- if (*data != ':')
- continue;
- data++;
- data += word_separation_length(data);
- mx = atol(data);
- got_mx = 1;
- continue;
- }
- /* ignore anything else */
- }
- if (!got_host || !got_st || !got_man || !got_mx || mx < 0) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: Invalid M-SEARCH: %d %d %d "
- "%d mx=%d", got_host, got_st, got_man, got_mx, mx);
- goto bad;
- }
- if (!st_match) {
- wpa_printf(MSG_DEBUG, "WPS UPnP: Ignored M-SEARCH (no ST "
- "match)");
- return;
- }
- if (mx > 120)
- mx = 120; /* UPnP-arch-DeviceArchitecture, 1.2.3 */
- msearchreply_state_machine_start(sm, client, mx);
- return;
-
-bad:
- wpa_printf(MSG_INFO, "WPS UPnP: Failed to parse M-SEARCH");
- wpa_printf(MSG_MSGDUMP, "WPS UPnP: M-SEARCH data:\n%s", start);
-}
-
-
-/* Listening for (UDP) discovery (M-SEARCH) packets */
-
-/**
- * ssdp_listener_stop - Stop SSDP listered
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- *
- * This function stops the SSDP listener that was started by calling
- * ssdp_listener_start().
- */
-void ssdp_listener_stop(struct upnp_wps_device_sm *sm)
-{
- if (sm->ssdp_sd_registered) {
- eloop_unregister_sock(sm->ssdp_sd, EVENT_TYPE_READ);
- sm->ssdp_sd_registered = 0;
- }
-
- if (sm->ssdp_sd != -1) {
- close(sm->ssdp_sd);
- sm->ssdp_sd = -1;
- }
-
- eloop_cancel_timeout(msearchreply_state_machine_handler, sm,
- ELOOP_ALL_CTX);
-}
-
-
-static void ssdp_listener_handler(int sd, void *eloop_ctx, void *sock_ctx)
-{
- struct upnp_wps_device_sm *sm = sock_ctx;
- struct sockaddr_in addr; /* client address */
- socklen_t addr_len;
- int nread;
- char buf[MULTICAST_MAX_READ], *pos;
-
- addr_len = sizeof(addr);
- nread = recvfrom(sm->ssdp_sd, buf, sizeof(buf) - 1, 0,
- (struct sockaddr *) &addr, &addr_len);
- if (nread <= 0)
- return;
- buf[nread] = '\0'; /* need null termination for algorithm */
-
- if (str_starts(buf, "NOTIFY ")) {
- /*
- * Silently ignore NOTIFYs to avoid filling debug log with
- * unwanted messages.
- */
- return;
- }
-
- pos = os_strchr(buf, '\n');
- if (pos)
- *pos = '\0';
- wpa_printf(MSG_MSGDUMP, "WPS UPnP: Received SSDP packet from %s:%d: "
- "%s", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port), buf);
- if (pos)
- *pos = '\n';
-
- /* Parse first line */
- if (os_strncasecmp(buf, "M-SEARCH", os_strlen("M-SEARCH")) == 0 &&
- !isgraph(buf[strlen("M-SEARCH")])) {
- ssdp_parse_msearch(sm, &addr, buf);
- return;
- }
-
- /* Ignore anything else */
-}
-
-
-int ssdp_listener_open(void)
-{
- struct sockaddr_in addr;
- struct ip_mreq mcast_addr;
- int on = 1;
- /* per UPnP spec, keep IP packet time to live (TTL) small */
- unsigned char ttl = 4;
- int sd;
-
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0)
- goto fail;
- if (fcntl(sd, F_SETFL, O_NONBLOCK) != 0)
- goto fail;
- if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)))
- goto fail;
- os_memset(&addr, 0, sizeof(addr));
- addr.sin_family = AF_INET;
- addr.sin_addr.s_addr = htonl(INADDR_ANY);
- addr.sin_port = htons(UPNP_MULTICAST_PORT);
- if (bind(sd, (struct sockaddr *) &addr, sizeof(addr)))
- goto fail;
- os_memset(&mcast_addr, 0, sizeof(mcast_addr));
- mcast_addr.imr_interface.s_addr = htonl(INADDR_ANY);
- mcast_addr.imr_multiaddr.s_addr = inet_addr(UPNP_MULTICAST_ADDRESS);
- if (setsockopt(sd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
- (char *) &mcast_addr, sizeof(mcast_addr)))
- goto fail;
- if (setsockopt(sd, IPPROTO_IP, IP_MULTICAST_TTL,
- &ttl, sizeof(ttl)))
- goto fail;
-
- return sd;
-
-fail:
- if (sd >= 0)
- close(sd);
- return -1;
-}
-
-
-/**
- * ssdp_listener_start - Set up for receiving discovery (UDP) packets
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * Returns: 0 on success, -1 on failure
- *
- * The SSDP listener is stopped by calling ssdp_listener_stop().
- */
-int ssdp_listener_start(struct upnp_wps_device_sm *sm)
-{
- sm->ssdp_sd = ssdp_listener_open();
-
- if (eloop_register_sock(sm->ssdp_sd, EVENT_TYPE_READ,
- ssdp_listener_handler, NULL, sm))
- goto fail;
- sm->ssdp_sd_registered = 1;
- return 0;
-
-fail:
- /* Error */
- wpa_printf(MSG_ERROR, "WPS UPnP: ssdp_listener_start failed");
- ssdp_listener_stop(sm);
- return -1;
-}
-
-
-/**
- * add_ssdp_network - Add routing entry for SSDP
- * @net_if: Selected network interface name
- * Returns: 0 on success, -1 on failure
- *
- * This function assures that the multicast address will be properly
- * handled by Linux networking code (by a modification to routing tables).
- * This must be done per network interface. It really only needs to be done
- * once after booting up, but it does not hurt to call this more frequently
- * "to be safe".
- */
-int add_ssdp_network(const char *net_if)
-{
-#ifdef __linux__
- int ret = -1;
- int sock = -1;
- struct rtentry rt;
- struct sockaddr_in *sin;
-
- if (!net_if)
- goto fail;
-
- os_memset(&rt, 0, sizeof(rt));
- sock = socket(AF_INET, SOCK_DGRAM, 0);
- if (sock < 0)
- goto fail;
-
- rt.rt_dev = (char *) net_if;
- sin = aliasing_hide_typecast(&rt.rt_dst, struct sockaddr_in);
- sin->sin_family = AF_INET;
- sin->sin_port = 0;
- sin->sin_addr.s_addr = inet_addr(SSDP_TARGET);
- sin = aliasing_hide_typecast(&rt.rt_genmask, struct sockaddr_in);
- sin->sin_family = AF_INET;
- sin->sin_port = 0;
- sin->sin_addr.s_addr = inet_addr(SSDP_NETMASK);
- rt.rt_flags = RTF_UP;
- if (ioctl(sock, SIOCADDRT, &rt) < 0) {
- if (errno == EPERM) {
- wpa_printf(MSG_DEBUG, "add_ssdp_network: No "
- "permissions to add routing table entry");
- /* Continue to allow testing as non-root */
- } else if (errno != EEXIST) {
- wpa_printf(MSG_INFO, "add_ssdp_network() ioctl errno "
- "%d (%s)", errno, strerror(errno));
- goto fail;
- }
- }
-
- ret = 0;
-
-fail:
- if (sock >= 0)
- close(sock);
-
- return ret;
-#else /* __linux__ */
- return 0;
-#endif /* __linux__ */
-}
-
-
-int ssdp_open_multicast_sock(u32 ip_addr)
-{
- int sd;
- /* per UPnP-arch-DeviceArchitecture, 1. Discovery, keep IP packet
- * time to live (TTL) small */
- unsigned char ttl = 4;
-
- sd = socket(AF_INET, SOCK_DGRAM, 0);
- if (sd < 0)
- return -1;
-
-#if 0 /* maybe ok if we sometimes block on writes */
- if (fcntl(sd, F_SETFL, O_NONBLOCK) != 0)
- return -1;
-#endif
-
- if (setsockopt(sd, IPPROTO_IP, IP_MULTICAST_IF,
- &ip_addr, sizeof(ip_addr))) {
- wpa_printf(MSG_DEBUG, "WPS: setsockopt(IP_MULTICAST_IF) %x: "
- "%d (%s)", ip_addr, errno, strerror(errno));
- return -1;
- }
- if (setsockopt(sd, IPPROTO_IP, IP_MULTICAST_TTL,
- &ttl, sizeof(ttl))) {
- wpa_printf(MSG_DEBUG, "WPS: setsockopt(IP_MULTICAST_TTL): "
- "%d (%s)", errno, strerror(errno));
- return -1;
- }
-
-#if 0 /* not needed, because we don't receive using multicast_sd */
- {
- struct ip_mreq mreq;
- mreq.imr_multiaddr.s_addr = inet_addr(UPNP_MULTICAST_ADDRESS);
- mreq.imr_interface.s_addr = ip_addr;
- wpa_printf(MSG_DEBUG, "WPS UPnP: Multicast addr 0x%x if addr "
- "0x%x",
- mreq.imr_multiaddr.s_addr,
- mreq.imr_interface.s_addr);
- if (setsockopt(sd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq,
- sizeof(mreq))) {
- wpa_printf(MSG_ERROR,
- "WPS UPnP: setsockopt "
- "IP_ADD_MEMBERSHIP errno %d (%s)",
- errno, strerror(errno));
- return -1;
- }
- }
-#endif /* not needed */
-
- /*
- * TODO: What about IP_MULTICAST_LOOP? It seems to be on by default?
- * which aids debugging I suppose but isn't really necessary?
- */
-
- return sd;
-}
-
-
-/**
- * ssdp_open_multicast - Open socket for sending multicast SSDP messages
- * @sm: WPS UPnP state machine from upnp_wps_device_init()
- * Returns: 0 on success, -1 on failure
- */
-int ssdp_open_multicast(struct upnp_wps_device_sm *sm)
-{
- sm->multicast_sd = ssdp_open_multicast_sock(sm->ip_addr);
- if (sm->multicast_sd < 0)
- return -1;
- return 0;
-}
projects / mech_eap.git / blobdiff