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@ -112,6 +112,11 @@ static struct io_context *io;
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#define SIP_MAX_HEADERS 64
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#define SIP_MAX_LINES 64
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static struct sip_codec_pref {
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int codec;
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struct sip_codec_pref *next;
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} *prefs;
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struct sip_request {
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char *rlPart1; /* SIP Method Name or "SIP/2.0" protocol version */
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char *rlPart2; /* The Request URI or Response Status */
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@ -411,6 +416,67 @@ static int auto_congest(void *nothing)
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return 0;
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}
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static void sip_prefs_free(void)
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{
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struct sip_codec_pref *cur, *next;
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cur = prefs;
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while(cur) {
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next = cur->next;
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free(cur);
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cur = next;
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}
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prefs = NULL;
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}
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static void sip_pref_remove(int format)
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{
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struct sip_codec_pref *cur, *prev;
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cur = prefs;
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while(cur) {
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if (cur->codec == format) {
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if (prev)
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prev->next = cur->next;
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else
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prefs = cur->next;
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free(cur);
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return;
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}
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prev = cur;
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cur = cur->next;
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}
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}
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static int sip_pref_append(int format)
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{
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struct sip_codec_pref *cur, *tmp;
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sip_pref_remove(format);
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tmp = (struct sip_codec_pref *)malloc(sizeof(struct sip_codec_pref));
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if (!tmp)
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return -1;
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memset(tmp, 0, sizeof(struct sip_codec_pref));
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tmp->codec = format;
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if (prefs) {
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cur = prefs;
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while(cur->next)
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cur = cur->next;
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cur->next = tmp;
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} else
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prefs = tmp;
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return 0;
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}
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static int sip_codec_choose(int formats)
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{
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struct sip_codec_pref *cur;
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cur = prefs;
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while(cur) {
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if (formats & cur->codec)
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return cur->codec;
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cur = cur->next;
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}
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return ast_best_codec(formats);
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}
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static int sip_call(struct ast_channel *ast, char *dest, int timeout)
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{
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int res;
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@ -813,9 +879,12 @@ static struct ast_channel *sip_new(struct sip_pvt *i, int state, char *title)
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int fmt;
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tmp = ast_channel_alloc(1);
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if (tmp) {
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tmp->nativeformats = i->capability;
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if (!tmp->nativeformats)
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tmp->nativeformats = capability;
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/* Select our native format based on codec preference until we receive
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something from another device to the contrary. */
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if (i->capability)
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tmp->nativeformats = sip_codec_choose(i->capability);
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else
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tmp->nativeformats = sip_codec_choose(capability);
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fmt = ast_best_codec(tmp->nativeformats);
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if (title)
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snprintf(tmp->name, sizeof(tmp->name), "SIP/%s-%04x", title, rand() & 0xffff);
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@ -1255,9 +1324,9 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req)
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return -1;
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}
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if (p->owner) {
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if (p->owner->nativeformats & p->capability) {
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if (!(p->owner->nativeformats & p->capability)) {
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ast_log(LOG_DEBUG, "Oooh, we need to change our formats since our peer supports only %d and not %d\n", p->capability, p->owner->nativeformats);
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p->owner->nativeformats = p->capability;
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p->owner->nativeformats = sip_codec_choose(p->capability);
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ast_set_read_format(p->owner, p->owner->readformat);
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ast_set_write_format(p->owner, p->owner->writeformat);
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}
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@ -3064,6 +3133,14 @@ static int handle_request(struct sip_pvt *p, struct sip_request *req, struct soc
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else
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transmit_response_with_allow(p, "200 OK", req);
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} else if (!strcasecmp(cmd, "INVITE")) {
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if (p->outgoing && p->owner && (p->owner->_state != AST_STATE_UP)) {
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/* This is a call to ourself. Send ourselves an error code and stop
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processing immediately, as SIP really has no good mechanism for
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being able to call yourself */
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transmit_response(p, "482 Loop Detected", req);
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/* We do NOT destroy p here, so that our response will be accepted */
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return 0;
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}
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/* Process the SDP portion */
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if (!ignore) {
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/* Use this as the basis */
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@ -3726,6 +3803,9 @@ static int reload_config()
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ast_log(LOG_NOTICE, "Unable to load config %s, SIP disabled\n", config);
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return 0;
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}
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sip_prefs_free();
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memset(&bindaddr, 0, sizeof(bindaddr));
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/* Initialize some reasonable defaults */
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strncpy(context, "default", sizeof(context) - 1);
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@ -3755,14 +3835,18 @@ static int reload_config()
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format = ast_getformatbyname(v->value);
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if (format < 1)
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ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
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else
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else {
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capability |= format;
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sip_pref_append(format);
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}
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} else if (!strcasecmp(v->name, "disallow")) {
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format = ast_getformatbyname(v->value);
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if (format < 1)
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ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
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else
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else {
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capability &= ~format;
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sip_pref_remove(format);
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}
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} else if (!strcasecmp(v->name, "register")) {
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sip_register(v->value, v->lineno);
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} else if (!strcasecmp(v->name, "tos")) {
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Matteo Brancaleoni
23 years ago