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Add sip redirect support (bug #3419i, with mods) 

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@5055 f38db490-d61c-443f-a65b-d21fe96a405b
This commit is contained in:
markster 2005-02-19 17:34:06 +00:00
parent 56a6b23126
commit b837531712
2 changed files with 102 additions and 4 deletions
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13
apps/app_transfer.c
View File

@ -29,7 +29,7 @@ static char *app = "Transfer";
static char *synopsis = "Transfer caller to remote extension";
static char *descrip =
" Transfer(exten): Requests the remote caller be transferred to\n"
" Transfer([Tech/]dest): Requests the remote caller be transferred\n"
"a given extension. Returns -1 on hangup, or 0 on completion\n"
"regardless of whether the transfer was successful. If the transfer\n"
"was *not* supported or successful and there exists a priority n + 101,\n"
@ -42,14 +42,21 @@ LOCAL_USER_DECL;
static int transfer_exec(struct ast_channel *chan, void *data)
{
int res=0;
int len;
struct localuser *u;
char *slash;
if (!data || !strlen(data)) {
ast_log(LOG_WARNING, "Transfer requires an argument (destination)\n");
ast_log(LOG_WARNING, "Transfer requires an argument ([Tech/]destination)\n");
res = 1;
}
if ((slash = strchr((char *)data, '/')) && (len = (slash - (char *)data))) {
/* Allow execution only if the Tech/destination agrees with the type of the channel */
if (strncasecmp(chan->type, (char *)data, len))
return 0;
}
LOCAL_USER_ADD(u);
if (!res) {
res = ast_transfer(chan, data);
res = ast_transfer(chan, data + strlen(chan->type) + 1);
}
if (!res) {
/* Look for a "busy" place */

93
channels/chan_sip.c
View File

@ -389,6 +389,7 @@ static struct sip_pvt {
struct sip_request initreq; /* Initial request */
int maxtime; /* Max time for first response */
int maxforwards; /* keep the max-forwards info */
int initid; /* Auto-congest ID if appropriate */
int autokillid; /* Auto-kill ID */
time_t lastrtprx; /* Last RTP received */
@ -598,6 +599,7 @@ static int transmit_reinvite_with_sdp(struct sip_pvt *p);
static int transmit_info_with_digit(struct sip_pvt *p, char digit);
static int transmit_message_with_text(struct sip_pvt *p, char *text);
static int transmit_refer(struct sip_pvt *p, char *dest);
static int sip_sipredirect(struct sip_pvt *p, char *dest);
static struct sip_peer *temp_peer(char *name);
static int do_proxy_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader, char *msg, int init);
static void free_old_route(struct sip_route *route);
@ -1968,6 +1970,10 @@ static int sip_transfer(struct ast_channel *ast, char *dest)
int res;
ast_mutex_lock(&p->lock);
if (ast->_state == AST_STATE_RING)
res = sip_sipredirect(p, dest);
else
res = transmit_refer(p, dest);
res = transmit_refer(p, dest);
ast_mutex_unlock(&p->lock);
return res;
@ -3252,6 +3258,11 @@ static int respprep(struct sip_request *resp, struct sip_pvt *p, char *msg, stru
} else {
add_header(resp, "Contact", p->our_contact);
}
if (p->maxforwards) {
char tmp[256];
snprintf(tmp, sizeof(tmp), "%d", p->maxforwards);
add_header(resp, "Max-Forwards", tmp);
}
return 0;
}
@ -9786,7 +9797,6 @@ static char *descrip_sipgetheader = ""
"Skips to priority+101 if header does not exist\n"
"Otherwise returns 0\n";
/*--- sip_dtmfmode: change the DTMFmode for a SIP call (application) ---*/
static int sip_dtmfmode(struct ast_channel *chan, void *data)
{
@ -9923,6 +9933,87 @@ static int sip_getheader(struct ast_channel *chan, void *data)
return 0;
}
#define DEFAULT_MAX_FORWARDS 70
/* This is 302 sipredirect function coded by Martin Pycko (m78pl@yahoo.com) */
static int sip_sipredirect(struct sip_pvt *p, char *dest)
{
char *cdest;
char *extension, *host, *port;
char tmp[80];
if (!dest || ast_strlen_zero(dest)) {
ast_log(LOG_WARNING, "This application requires these arguments: SIPRedirect(extension[@host[:port]])\n");
return 0;
}
cdest = ast_strdupa(dest);
if (!cdest) {
ast_log(LOG_ERROR, "Problem allocating the memory\n");
return 0;
}
extension = strsep(&cdest, "@");
host = strsep(&cdest, ":");
port = strsep(&cdest, ":");
if (!extension) {
ast_log(LOG_ERROR, "Missing mandatory argument: extension\n");
return 0;
}
/* we'll issue the redirect message here */
if (!host) {
char *localtmp;
strncpy(tmp, get_header(&p->initreq, "To"), sizeof(tmp) - 1);
if (!strlen(tmp)) {
ast_log(LOG_ERROR, "Cannot retrieve the 'To' header from the original SIP request!\n");
return 0;
}
if ((localtmp = strstr(tmp, "sip:")) && (localtmp = strchr(localtmp, '@'))) {
char lhost[80], lport[80];
memset(lhost, 0, sizeof(lhost));
memset(lport, 0, sizeof(lport));
localtmp++;
/* This is okay becuase lhost and lport are as big as tmp */
sscanf(localtmp, "%[^<>:; ]:%[^<>:; ]", lhost, lport);
if (!strlen(lhost)) {
ast_log(LOG_ERROR, "Can't find the host address\n");
return 0;
}
host = ast_strdupa(lhost);
if (!host) {
ast_log(LOG_ERROR, "Problem allocating the memory\n");
return 0;
}
if (!ast_strlen_zero(lport)) {
port = ast_strdupa(lport);
if (!port) {
ast_log(LOG_ERROR, "Problem allocating the memory\n");
return 0;
}
}
}
}
/* make sure the forwarding won't be forever */
strncpy(tmp, get_header(&p->initreq, "Max-Forwards"), sizeof(tmp) - 1);
if (strlen(tmp) && atoi(tmp)) {
/* we found Max-Forwards in the original SIP request */
p->maxforwards = atoi(tmp) - 1;
} else {
/* just send our 302 Moved Temporarily */
p->maxforwards = DEFAULT_MAX_FORWARDS - 1;
}
if (p->maxforwards > -1) {
snprintf(p->our_contact, sizeof(p->our_contact), "redirect <sip:%s@%s%s%s>", extension, host, port ? ":" : "", port ? port : "");
transmit_response_reliable(p, "302 Moved Temporarily", &p->initreq, 1);
} else {
transmit_response(p, "483 Too Many Hops", &p->initreq);
}
/* this is all that we want to send to that SIP device */
ast_set_flag(p, SIP_ALREADYGONE);
/* hangup here */
return -1;
}
/*--- sip_get_codec: Return peers codec ---*/
static int sip_get_codec(struct ast_channel *chan)
{