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sip.cpp
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/*****************************************************************************\
** **
** Linux Call Router **
** **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg **
** **
** SIP port **
** **
\*****************************************************************************/
#include "main.h"
#include <sofia-sip/sip_status.h>
#include <sofia-sip/su_log.h>
#include <sofia-sip/sdp.h>
#include <sofia-sip/sip_header.h>
#undef NUTAG_AUTO100
unsigned char flip[256];
int any_sip_interface = 0;
//pthread_mutex_t mutex_msg;
su_home_t sip_home[1];
struct sip_inst {
char interface_name[64];
char local_peer[32];
char remote_peer[32];
su_root_t *root;
nua_t *nua;
};
static int delete_event(struct lcr_work *work, void *instance, int index);
static int load_timer(struct lcr_timer *timer, void *instance, int index);
/*
* initialize SIP port
*/
Psip::Psip(int type, char *portname, struct port_settings *settings, struct interface *interface) : Port(type, portname, settings, interface)
{
p_s_rtp_bridge = 0;
if (interface->rtp_bridge)
p_s_rtp_bridge = 1;
p_s_sip_inst = interface->sip_inst;
memset(&p_s_delete, 0, sizeof(p_s_delete));
add_work(&p_s_delete, delete_event, this, 0);
p_s_handle = 0;
p_s_magic = 0;
memset(&p_s_rtp_fd, 0, sizeof(p_s_rtp_fd));
memset(&p_s_rtcp_fd, 0, sizeof(p_s_rtcp_fd));
memset(&p_s_rtp_sin_local, 0, sizeof(p_s_rtp_sin_local));
memset(&p_s_rtcp_sin_local, 0, sizeof(p_s_rtcp_sin_local));
memset(&p_s_rtp_sin_remote, 0, sizeof(p_s_rtp_sin_remote));
memset(&p_s_rtcp_sin_remote, 0, sizeof(p_s_rtcp_sin_remote));
p_s_rtp_ip_local = 0;
p_s_rtp_ip_remote = 0;
p_s_rtp_port_local = 0;
p_s_rtp_port_remote = 0;
p_s_b_sock = -1;
p_s_b_index = -1;
p_s_b_active = 0;
p_s_rxpos = 0;
p_s_rtp_tx_action = 0;
/* audio */
memset(&p_s_loadtimer, 0, sizeof(p_s_loadtimer));
add_timer(&p_s_loadtimer, load_timer, this, 0);
p_s_next_tv_sec = 0;
PDEBUG(DEBUG_SIP, "Created new Psip(%s).\n", portname);
if (!p_s_sip_inst)
FATAL("No SIP instance for interface\n");
}
/*
* destructor
*/
Psip::~Psip()
{
PDEBUG(DEBUG_SIP, "Destroyed SIP process(%s).\n", p_name);
del_timer(&p_s_loadtimer);
del_work(&p_s_delete);
rtp_close();
}
static const char *media_type2name(uint8_t media_type) {
switch (media_type) {
case MEDIA_TYPE_ULAW:
return "PCMU";
case MEDIA_TYPE_ALAW:
return "PCMA";
case MEDIA_TYPE_GSM:
return "GSM";
case MEDIA_TYPE_GSM_HR:
return "GSM-HR";
case MEDIA_TYPE_GSM_EFR:
return "GSM-EFR";
case MEDIA_TYPE_AMR:
return "AMR";
}
return "UKN";
}
static void sip_trace_header(class Psip *sip, const char *message, int direction)
{
/* init trace with given values */
start_trace(-1,
NULL,
sip?numberrize_callerinfo(sip->p_callerinfo.id, sip->p_callerinfo.ntype, options.national, options.international):NULL,
sip?sip->p_dialinginfo.id:NULL,
direction,
CATEGORY_CH,
sip?sip->p_serial:0,
message);
}
/*
* RTP
*/
/* according to RFC 3550 */
struct rtp_hdr {
#if __BYTE_ORDER == __LITTLE_ENDIAN
uint8_t csrc_count:4,
extension:1,
padding:1,
version:2;
uint8_t payload_type:7,
marker:1;
#elif __BYTE_ORDER == __BIG_ENDIAN
uint8_t version:2,
padding:1,
extension:1,
csrc_count:4;
uint8_t marker:1,
payload_type:7;
#endif
uint16_t sequence;
uint32_t timestamp;
uint32_t ssrc;
} __attribute__((packed));
struct rtp_x_hdr {
uint16_t by_profile;
uint16_t length;
} __attribute__((packed));
#define RTP_VERSION 2
#define PAYLOAD_TYPE_ULAW 0
#define PAYLOAD_TYPE_ALAW 8
#define PAYLOAD_TYPE_GSM 3
/* decode an rtp frame */
static int rtp_decode(class Psip *psip, unsigned char *data, int len)
{
struct rtp_hdr *rtph = (struct rtp_hdr *)data;
struct rtp_x_hdr *rtpxh;
uint8_t *payload;
int payload_len;
int x_len;
unsigned char *from, *to;
int n;
if (len < 12) {
PDEBUG(DEBUG_SIP, "received RTP frame too short (len = %d)\n", len);
return -EINVAL;
}
if (rtph->version != RTP_VERSION) {
PDEBUG(DEBUG_SIP, "received RTP version %d not supported.\n", rtph->version);
return -EINVAL;
}
payload = data + sizeof(struct rtp_hdr) + (rtph->csrc_count << 2);
payload_len = len - sizeof(struct rtp_hdr) - (rtph->csrc_count << 2);
if (payload_len < 0) {
PDEBUG(DEBUG_SIP, "received RTP frame too short (len = %d, "
"csrc count = %d)\n", len, rtph->csrc_count);
return -EINVAL;
}
if (rtph->extension) {
if (payload_len < (int)sizeof(struct rtp_x_hdr)) {
PDEBUG(DEBUG_SIP, "received RTP frame too short for "
"extension header\n");
return -EINVAL;
}
rtpxh = (struct rtp_x_hdr *)payload;
x_len = ntohs(rtpxh->length) * 4 + sizeof(struct rtp_x_hdr);
payload += x_len;
payload_len -= x_len;
if (payload_len < 0) {
PDEBUG(DEBUG_SIP, "received RTP frame too short, "
"extension header exceeds frame length\n");
return -EINVAL;
}
}
if (rtph->padding) {
if (payload_len < 0) {
PDEBUG(DEBUG_SIP, "received RTP frame too short for "
"padding length\n");
return -EINVAL;
}
payload_len -= payload[payload_len - 1];
if (payload_len < 0) {
PDEBUG(DEBUG_SIP, "received RTP frame with padding "
"greater than payload\n");
return -EINVAL;
}
}
switch (rtph->payload_type) {
#if 0
we only support alaw and ulaw!
case RTP_PT_GSM_FULL:
if (payload_len != 33) {
PDEBUG(DEBUG_SIP, "received RTP full rate frame with "
"payload length != 33 (len = %d)\n",
payload_len);
return -EINVAL;
}
break;
case RTP_PT_GSM_EFR:
if (payload_len != 31) {
PDEBUG(DEBUG_SIP, "received RTP full rate frame with "
"payload length != 31 (len = %d)\n",
payload_len);
return -EINVAL;
}
break;
case RTP_PT_GSM_HALF:
if (payload_len != 14) {
PDEBUG(DEBUG_SIP, "received RTP half rate frame with "
"payload length != 14 (len = %d)\n",
payload_len);
return -EINVAL;
}
break;
#endif
case PAYLOAD_TYPE_ALAW:
if (options.law != 'a') {
PDEBUG(DEBUG_SIP, "received Alaw, but we don't do Alaw\n");
return -EINVAL;
}
break;
case PAYLOAD_TYPE_ULAW:
if (options.law == 'a') {
PDEBUG(DEBUG_SIP, "received Ulaw, but we don't do Ulaw\n");
return -EINVAL;
}
break;
default:
PDEBUG(DEBUG_SIP, "received RTP frame with unknown payload "
"type %d\n", rtph->payload_type);
return -EINVAL;
}
if (payload_len <= 0) {
PDEBUG(DEBUG_SIP, "received RTP payload is too small: %d\n", payload_len);
return 0;
}
/* record audio */
if (psip->p_record)
psip->record(payload, payload_len, 0); // from down
if (psip->p_tap)
psip->tap(payload, payload_len, 0); // from down
n = payload_len;
from = payload;
to = payload;
if (psip->p_echotest) {
/* echo rtp data we just received */
psip->rtp_send_frame(from, n, (options.law=='a')?PAYLOAD_TYPE_ALAW:PAYLOAD_TYPE_ULAW);
return 0;
}
while(n--)
*to++ = flip[*from++];
psip->bridge_tx(payload, payload_len);
return 0;
}
static int rtp_sock_callback(struct lcr_fd *fd, unsigned int what, void *instance, int index)
{
class Psip *psip = (class Psip *) instance;
int len;
unsigned char buffer[256];
int rc = 0;
if ((what & LCR_FD_READ)) {
len = read(fd->fd, &buffer, sizeof(buffer));
if (len <= 0) {
PDEBUG(DEBUG_SIP, "read result=%d\n", len);
// psip->rtp_close();
// psip->rtp_shutdown();
return len;
}
if (psip->p_s_rtp_is_connected)
rc = rtp_decode(psip, buffer, len);
}
return rc;
}
static int rtcp_sock_callback(struct lcr_fd *fd, unsigned int what, void *instance, int index)
{
// class Psip *psip = (class Psip *) instance;
int len;
unsigned char buffer[256];
if ((what & LCR_FD_READ)) {
len = read(fd->fd, &buffer, sizeof(buffer));
if (len <= 0) {
PDEBUG(DEBUG_SIP, "read result=%d\n", len);
// psip->rtp_close();
// psip->rtp_shutdown();
return len;
}
PDEBUG(DEBUG_SIP, "rtcp!\n");
}
return 0;
}
#define RTP_PORT_BASE 30000
#define RTP_PORT_MAX 39998
static unsigned short next_udp_port = RTP_PORT_BASE;
static int rtp_sub_socket_bind(int fd, struct sockaddr_in *sin_local, uint32_t ip, uint16_t port)
{
int rc;
socklen_t alen = sizeof(*sin_local);
sin_local->sin_family = AF_INET;
sin_local->sin_addr.s_addr = htonl(ip);
sin_local->sin_port = htons(port);
rc = bind(fd, (struct sockaddr *) sin_local, sizeof(*sin_local));
if (rc < 0)
return rc;
/* retrieve the address we actually bound to, in case we
* passed INADDR_ANY as IP address */
return getsockname(fd, (struct sockaddr *) sin_local, &alen);
}
static int rtp_sub_socket_connect(int fd, struct sockaddr_in *sin_local, struct sockaddr_in *sin_remote, uint32_t ip, uint16_t port)
{
int rc;
socklen_t alen = sizeof(*sin_local);
sin_remote->sin_family = AF_INET;
sin_remote->sin_addr.s_addr = htonl(ip);
sin_remote->sin_port = htons(port);
rc = connect(fd, (struct sockaddr *) sin_remote, sizeof(*sin_remote));
if (rc < 0) {
PERROR("failed to connect to ip %08x port %d rc=%d\n", ip, port, rc);
return rc;
}
return getsockname(fd, (struct sockaddr *) sin_local, &alen);
}
int Psip::rtp_open(void)
{
int rc, rc2;
struct in_addr ia;
unsigned int ip;
unsigned short start_port;
/* create socket */
rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (rc < 0) {
rtp_close();
return -EIO;
}
p_s_rtp_fd.fd = rc;
register_fd(&p_s_rtp_fd, LCR_FD_READ, rtp_sock_callback, this, 0);
rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (rc < 0) {
rtp_close();
return -EIO;
}
p_s_rtcp_fd.fd = rc;
register_fd(&p_s_rtcp_fd, LCR_FD_READ, rtcp_sock_callback, this, 0);
/* bind socket */
ip = htonl(INADDR_ANY);
ia.s_addr = ip;
start_port = next_udp_port;
while (1) {
rc = rtp_sub_socket_bind(p_s_rtp_fd.fd, &p_s_rtp_sin_local, ip, next_udp_port);
if (rc != 0)
goto try_next_port;
rc = rtp_sub_socket_bind(p_s_rtcp_fd.fd, &p_s_rtcp_sin_local, ip, next_udp_port + 1);
if (rc == 0) {
p_s_rtp_port_local = next_udp_port;
next_udp_port = (next_udp_port + 2 > RTP_PORT_MAX) ? RTP_PORT_BASE : next_udp_port + 2;
break;
}
/* reopen rtp socket and try again with next udp port */
unregister_fd(&p_s_rtp_fd);
close(p_s_rtp_fd.fd);
p_s_rtp_fd.fd = 0;
rc2 = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (rc2 < 0) {
rtp_close();
return -EIO;
}
p_s_rtp_fd.fd = rc2;
register_fd(&p_s_rtp_fd, LCR_FD_READ, rtp_sock_callback, this, 0);
try_next_port:
next_udp_port = (next_udp_port + 2 > RTP_PORT_MAX) ? RTP_PORT_BASE : next_udp_port + 2;
if (next_udp_port == start_port)
break;
/* we must use rc2, in order to preserve rc */
}
if (rc < 0) {
PDEBUG(DEBUG_SIP, "failed to find port\n");
rtp_close();
return rc;
}
p_s_rtp_ip_local = ntohl(p_s_rtp_sin_local.sin_addr.s_addr);
PDEBUG(DEBUG_SIP, "local ip %08x port %d\n", p_s_rtp_ip_local, p_s_rtp_port_local);
PDEBUG(DEBUG_SIP, "remote ip %08x port %d\n", p_s_rtp_ip_remote, p_s_rtp_port_remote);
return p_s_rtp_port_local;
}
int Psip::rtp_connect(void)
{
int rc;
struct in_addr ia;
ia.s_addr = htonl(p_s_rtp_ip_remote);
PDEBUG(DEBUG_SIP, "rtp_connect(ip=%s, port=%u)\n", inet_ntoa(ia), p_s_rtp_port_remote);
rc = rtp_sub_socket_connect(p_s_rtp_fd.fd, &p_s_rtp_sin_local, &p_s_rtp_sin_remote, p_s_rtp_ip_remote, p_s_rtp_port_remote);
if (rc < 0)
return rc;
rc = rtp_sub_socket_connect(p_s_rtcp_fd.fd, &p_s_rtcp_sin_local, &p_s_rtcp_sin_remote, p_s_rtp_ip_remote, p_s_rtp_port_remote + 1);
if (rc < 0)
return rc;
p_s_rtp_ip_local = ntohl(p_s_rtp_sin_local.sin_addr.s_addr);
PDEBUG(DEBUG_SIP, "local ip %08x port %d\n", p_s_rtp_ip_local, p_s_rtp_port_local);
PDEBUG(DEBUG_SIP, "remote ip %08x port %d\n", p_s_rtp_ip_remote, p_s_rtp_port_remote);
p_s_rtp_is_connected = 1;
return 0;
}
void Psip::rtp_close(void)
{
if (p_s_rtp_fd.fd > 0) {
unregister_fd(&p_s_rtp_fd);
close(p_s_rtp_fd.fd);
p_s_rtp_fd.fd = 0;
}
if (p_s_rtcp_fd.fd > 0) {
unregister_fd(&p_s_rtcp_fd);
close(p_s_rtcp_fd.fd);
p_s_rtcp_fd.fd = 0;
}
if (p_s_rtp_is_connected) {
PDEBUG(DEBUG_SIP, "rtp closed\n");
p_s_rtp_is_connected = 0;
}
}
/* "to - from" */
void tv_difference(struct timeval *diff, const struct timeval *from,
const struct timeval *__to)
{
struct timeval _to = *__to, *to = &_to;
if (to->tv_usec < from->tv_usec) {
to->tv_sec -= 1;
to->tv_usec += 1000000;
}
diff->tv_usec = to->tv_usec - from->tv_usec;
diff->tv_sec = to->tv_sec - from->tv_sec;
}
/* encode and send a rtp frame */
int Psip::rtp_send_frame(unsigned char *data, unsigned int len, uint8_t payload_type)
{
struct rtp_hdr *rtph;
int payload_len;
int duration; /* in samples */
unsigned char buffer[256];
/* record audio */
if (p_record)
record(data, len, 1); // from up
if (p_tap)
tap(data, len, 1); // from up
if (!p_s_rtp_is_connected) {
/* drop silently */
return 0;
}
if (!p_s_rtp_tx_action) {
/* initialize sequences */
p_s_rtp_tx_action = 1;
p_s_rtp_tx_ssrc = rand();
p_s_rtp_tx_sequence = random();
p_s_rtp_tx_timestamp = random();
memset(&p_s_rtp_tx_last_tv, 0, sizeof(p_s_rtp_tx_last_tv));
}
switch (payload_type) {
#if 0
we only support alaw and ulaw!
case RTP_PT_GSM_FULL:
payload_len = 33;
duration = 160;
break;
case RTP_PT_GSM_EFR:
payload_len = 31;
duration = 160;
break;
case RTP_PT_GSM_HALF:
payload_len = 14;
duration = 160;
break;
#endif
case PAYLOAD_TYPE_ALAW:
case PAYLOAD_TYPE_ULAW:
payload_len = len;
duration = len;
break;
default:
PERROR("unsupported message type %d\n", payload_type);
return -EINVAL;
}
#if 0
{
struct timeval tv, tv_diff;
long int usec_diff, frame_diff;
gettimeofday(&tv, NULL);
tv_difference(&tv_diff, &p_s_rtp_tx_last_tv, &tv);
p_s_rtp_tx_last_tv = tv;
usec_diff = tv_diff.tv_sec * 1000000 + tv_diff.tv_usec;
frame_diff = (usec_diff / 20000);
if (abs(frame_diff) > 1) {
long int frame_diff_excess = frame_diff - 1;
PDEBUG(DEBUG_SIP, "Correcting frame difference of %ld frames\n", frame_diff_excess);
p_s_rtp_tx_sequence += frame_diff_excess;
p_s_rtp_tx_timestamp += frame_diff_excess * duration;
}
}
#endif
rtph = (struct rtp_hdr *) buffer;
rtph->version = RTP_VERSION;
rtph->padding = 0;
rtph->extension = 0;
rtph->csrc_count = 0;
rtph->marker = 0;
rtph->payload_type = payload_type;
rtph->sequence = htons(p_s_rtp_tx_sequence++);
rtph->timestamp = htonl(p_s_rtp_tx_timestamp);
p_s_rtp_tx_timestamp += duration;
rtph->ssrc = htonl(p_s_rtp_tx_ssrc);
memcpy(buffer + sizeof(struct rtp_hdr), data, payload_len);
if (p_s_rtp_fd.fd > 0) {
len = write(p_s_rtp_fd.fd, &buffer, sizeof(struct rtp_hdr) + payload_len);
if (len != sizeof(struct rtp_hdr) + payload_len) {
PDEBUG(DEBUG_SIP, "write result=%d\n", len);
// rtp_close();
// rtp_shutdown();
return -EIO;
}
}
return 0;
}
/* receive from remote */
int Psip::bridge_rx(unsigned char *data, int len)
{
/* don't bridge, if tones are provided */
if (p_tone_name[0])
return -EBUSY;
/* write to rx buffer */
while(len--) {
p_s_rxdata[p_s_rxpos++] = flip[*data++];
if (p_s_rxpos == 160) {
p_s_rxpos = 0;
/* transmit data via rtp */
rtp_send_frame(p_s_rxdata, 160, (options.law=='a')?PAYLOAD_TYPE_ALAW:PAYLOAD_TYPE_ULAW);
}
}
return 0;
}
/* taken from freeswitch */
/* map sip responses to QSIG cause codes ala RFC4497 section 8.4.4 */
static int status2cause(int status)
{
switch (status) {
case 200:
return 16; //SWITCH_CAUSE_NORMAL_CLEARING;
case 401:
case 402:
case 403:
case 407:
case 603:
return 21; //SWITCH_CAUSE_CALL_REJECTED;
case 404:
return 1; //SWITCH_CAUSE_UNALLOCATED_NUMBER;
case 485:
case 604:
return 3; //SWITCH_CAUSE_NO_ROUTE_DESTINATION;
case 408:
case 504:
return 102; //SWITCH_CAUSE_RECOVERY_ON_TIMER_EXPIRE;
case 410:
return 22; //SWITCH_CAUSE_NUMBER_CHANGED;
case 413:
case 414:
case 416:
case 420:
case 421:
case 423:
case 505:
case 513:
return 127; //SWITCH_CAUSE_INTERWORKING;
case 480:
return 180; //SWITCH_CAUSE_NO_USER_RESPONSE;
case 400:
case 481:
case 500:
case 503:
return 41; //SWITCH_CAUSE_NORMAL_TEMPORARY_FAILURE;
case 486:
case 600:
return 17; //SWITCH_CAUSE_USER_BUSY;
case 484:
return 28; //SWITCH_CAUSE_INVALID_NUMBER_FORMAT;
case 488:
case 606:
return 88; //SWITCH_CAUSE_INCOMPATIBLE_DESTINATION;
case 502:
return 38; //SWITCH_CAUSE_NETWORK_OUT_OF_ORDER;
case 405:
return 63; //SWITCH_CAUSE_SERVICE_UNAVAILABLE;
case 406:
case 415:
case 501:
return 79; //SWITCH_CAUSE_SERVICE_NOT_IMPLEMENTED;
case 482:
case 483:
return 25; //SWITCH_CAUSE_EXCHANGE_ROUTING_ERROR;
case 487:
return 31; //??? SWITCH_CAUSE_ORIGINATOR_CANCEL;
default:
return 31; //SWITCH_CAUSE_NORMAL_UNSPECIFIED;
}
}
static int cause2status(int cause, int location, const char **st)
{
int s;
switch (cause) {
case 1:
s = 404; *st = sip_404_Not_found;
break;
case 2:
s = 404; *st = sip_404_Not_found;
break;
case 3:
s = 404; *st = sip_404_Not_found;
break;
case 17:
s = 486; *st = sip_486_Busy_here;
break;
case 18:
s = 408; *st = sip_408_Request_timeout;
break;
case 19:
s = 480; *st = sip_480_Temporarily_unavailable;
break;
case 20:
s = 480; *st = sip_480_Temporarily_unavailable;
break;
case 21:
if (location == LOCATION_USER) {
s = 603; *st = sip_603_Decline;
} else {
s = 403; *st = sip_403_Forbidden;
}
break;
case 22:
//s = 301; *st = sip_301_Moved_permanently;
s = 410; *st = sip_410_Gone;
break;
case 23:
s = 410; *st = sip_410_Gone;
break;
case 27:
s = 502; *st = sip_502_Bad_gateway;
break;
case 28:
s = 484; *st = sip_484_Address_incomplete;
break;
case 29:
s = 501; *st = sip_501_Not_implemented;
break;
case 31:
s = 480; *st = sip_480_Temporarily_unavailable;
break;
case 34:
s = 503; *st = sip_503_Service_unavailable;
break;
case 38:
s = 503; *st = sip_503_Service_unavailable;
break;
case 41:
s = 503; *st = sip_503_Service_unavailable;
break;
case 42:
s = 503; *st = sip_503_Service_unavailable;
break;
case 47:
s = 503; *st = sip_503_Service_unavailable;
break;
case 55:
s = 403; *st = sip_403_Forbidden;
break;
case 57:
s = 403; *st = sip_403_Forbidden;
break;
case 58:
s = 503; *st = sip_503_Service_unavailable;
break;
case 65:
s = 488; *st = sip_488_Not_acceptable;
break;
case 69:
s = 501; *st = sip_501_Not_implemented;
break;
case 70:
s = 488; *st = sip_488_Not_acceptable;
break;
case 79:
s = 501; *st = sip_501_Not_implemented;
break;
case 87:
s = 403; *st = sip_403_Forbidden;
break;
case 88:
s = 503; *st = sip_503_Service_unavailable;
break;
case 102:
s = 504; *st = sip_504_Gateway_time_out;
break;
default:
s = 468; *st = sip_486_Busy_here;
}
return s;
}
/*
* endpoint sends messages to the SIP port
*/
int Psip::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
{
char sdp_str[256];
struct in_addr ia;
struct lcr_msg *message;
int media_type;
unsigned char payload_type;
if (param->connectinfo.rtpinfo.port) {
PDEBUG(DEBUG_SIP, "RTP info given by remote, forward that\n");
p_s_rtp_bridge = 1;
media_type = param->connectinfo.rtpinfo.media_types[0];
payload_type = param->connectinfo.rtpinfo.payload_types[0];
p_s_rtp_ip_local = param->connectinfo.rtpinfo.ip;
p_s_rtp_port_local = param->connectinfo.rtpinfo.port;
PDEBUG(DEBUG_SIP, "payload type %d\n", payload_type);
PDEBUG(DEBUG_SIP, "local ip %08x port %d\n", p_s_rtp_ip_local, p_s_rtp_port_local);
PDEBUG(DEBUG_SIP, "remote ip %08x port %d\n", p_s_rtp_ip_remote, p_s_rtp_port_remote);
} else {
PDEBUG(DEBUG_SIP, "RTP info not given by remote, so we do our own RTP\n");
media_type = (options.law=='a') ? MEDIA_TYPE_ALAW : MEDIA_TYPE_ULAW;
payload_type = (options.law=='a') ? PAYLOAD_TYPE_ALAW : PAYLOAD_TYPE_ULAW;
/* open local RTP peer (if not bridging) */
if (!p_s_rtp_is_connected && rtp_connect() < 0) {
nua_cancel(p_s_handle, TAG_END());
nua_handle_destroy(p_s_handle);
p_s_handle = NULL;
sip_trace_header(this, "CANCEL", DIRECTION_OUT);
add_trace("reason", NULL, "failed to connect RTP/RTCP sockts");
end_trace();
message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = 41;
message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
message_put(message);
new_state(PORT_STATE_RELEASE);
trigger_work(&p_s_delete);
return 0;
}
}
ia.s_addr = htonl(p_s_rtp_ip_local);
SPRINT(sdp_str,
"v=0\n"
"o=LCR-Sofia-SIP 0 0 IN IP4 %s\n"
"s=SIP Call\n"
"c=IN IP4 %s\n"
"t=0 0\n"
"m=audio %d RTP/AVP %d\n"
"a=rtpmap:%d %s/8000\n"
, inet_ntoa(ia), inet_ntoa(ia), p_s_rtp_port_local, payload_type, payload_type, media_type2name(media_type));
PDEBUG(DEBUG_SIP, "Using SDP response: %s\n", sdp_str);
nua_respond(p_s_handle, SIP_200_OK,
NUTAG_MEDIA_ENABLE(0),
SIPTAG_CONTENT_TYPE_STR("application/sdp"),
SIPTAG_PAYLOAD_STR(sdp_str), TAG_END());
new_state(PORT_STATE_CONNECT);
sip_trace_header(this, "RESPOND", DIRECTION_OUT);
add_trace("respond", "value", "200 OK");
add_trace("reason", NULL, "call connected");
add_trace("rtp", "ip", "%s", inet_ntoa(ia));
add_trace("rtp", "port", "%d,%d", p_s_rtp_port_local, p_s_rtp_port_local + 1);
add_trace("rtp", "payload", "%s:%d", media_type2name(media_type), payload_type);
end_trace();
return 0;
}
int Psip::message_release(unsigned int epoint_id, int message_id, union parameter *param)
{
struct lcr_msg *message;
char cause_str[128] = "";
int cause = param->disconnectinfo.cause;
int location = param->disconnectinfo.cause;
int status;
const char *status_text;
if (cause > 0 && cause <= 127) {
SPRINT(cause_str, "Q.850;cause=%d;text=\"%s\"", cause, isdn_cause[cause].english);
}
switch (p_state) {
case PORT_STATE_OUT_SETUP:
case PORT_STATE_OUT_PROCEEDING:
case PORT_STATE_OUT_ALERTING:
PDEBUG(DEBUG_SIP, "RELEASE/DISCONNECT will cancel\n");
sip_trace_header(this, "CANCEL", DIRECTION_OUT);
if (cause_str[0])
add_trace("cause", "value", "%d", cause);
end_trace();
nua_cancel(p_s_handle, TAG_IF(cause_str[0], SIPTAG_REASON_STR(cause_str)), TAG_END());
break;
case PORT_STATE_IN_SETUP:
case PORT_STATE_IN_PROCEEDING:
case PORT_STATE_IN_ALERTING:
PDEBUG(DEBUG_SIP, "RELEASE/DISCONNECT will respond\n");
status = cause2status(cause, location, &status_text);
sip_trace_header(this, "RESPOND", DIRECTION_OUT);
if (cause_str[0])
add_trace("cause", "value", "%d", cause);
add_trace("respond", "value", "%d %s", status, status_text);
end_trace();
nua_respond(p_s_handle, status, status_text, TAG_IF(cause_str[0], SIPTAG_REASON_STR(cause_str)), TAG_END());
nua_handle_destroy(p_s_handle);
p_s_handle = NULL;
trigger_work(&p_s_delete);
break;
default:
PDEBUG(DEBUG_SIP, "RELEASE/DISCONNECT will perform nua_bye\n");
sip_trace_header(this, "BYE", DIRECTION_OUT);
if (cause_str[0])
add_trace("cause", "value", "%d", cause);
end_trace();
nua_bye(p_s_handle, TAG_IF(cause_str[0], SIPTAG_REASON_STR(cause_str)), TAG_END());
}
if (message_id == MESSAGE_DISCONNECT) {
while(p_epointlist) {
message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = CAUSE_NORMAL;
message->param.disconnectinfo.location = LOCATION_BEYOND;
message_put(message);
/* remove epoint */
free_epointlist(p_epointlist);
}
}
new_state(PORT_STATE_RELEASE);
return(0);
}
int Psip::message_setup(unsigned int epoint_id, int message_id, union parameter *param)
{
struct sip_inst *inst = (struct sip_inst *) p_s_sip_inst;
char from[128];
char to[128];
const char *local = inst->local_peer;
char local_ip[16];
const char *remote = inst->remote_peer;
char sdp_str[512], pt_str[32];
struct in_addr ia;
struct epoint_list *epointlist;
sip_cseq_t *cseq = NULL;
struct lcr_msg *message;
int lcr_media = { (options.law=='a') ? MEDIA_TYPE_ALAW : MEDIA_TYPE_ULAW };
unsigned char lcr_payload = { (options.law=='a') ? PAYLOAD_TYPE_ALAW : PAYLOAD_TYPE_ULAW };
int *media_types;
unsigned char *payload_types;
int payloads = 0;
int i;
PDEBUG(DEBUG_SIP, "Doing Setup (inst %p)\n", inst);
memcpy(&p_dialinginfo, ¶m->setup.dialinginfo, sizeof(p_dialinginfo));
memcpy(&p_callerinfo, ¶m->setup.callerinfo, sizeof(p_callerinfo));
memcpy(&p_redirinfo, ¶m->setup.redirinfo, sizeof(p_redirinfo));
if (param->setup.rtpinfo.port) {
PDEBUG(DEBUG_SIP, "RTP info given by remote, forward that\n");
p_s_rtp_bridge = 1;
media_types = param->setup.rtpinfo.media_types;
payload_types = param->setup.rtpinfo.payload_types;
payloads = param->setup.rtpinfo.payloads;
p_s_rtp_ip_local = param->setup.rtpinfo.ip;
p_s_rtp_port_local = param->setup.rtpinfo.port;
PDEBUG(DEBUG_SIP, "local ip %08x port %d\n", p_s_rtp_ip_local, p_s_rtp_port_local);
PDEBUG(DEBUG_SIP, "remote ip %08x port %d\n", p_s_rtp_ip_remote, p_s_rtp_port_remote);
} else {
PDEBUG(DEBUG_SIP, "RTP info not given by remote, so we do our own RTP\n");
p_s_rtp_bridge = 0;
media_types = &lcr_media;
payload_types = &lcr_payload;
payloads = 1;
/* open local RTP peer (if not bridging) */
if (rtp_open() < 0) {
PERROR("Failed to open RTP sockets\n");
/* send release message to endpoit */
message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = 41;
message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
message_put(message);
new_state(PORT_STATE_RELEASE);
trigger_work(&p_s_delete);
return 0;
}
}
p_s_handle = nua_handle(inst->nua, NULL, TAG_END());
if (!p_s_handle) {
PERROR("Failed to create handle\n");
/* send release message to endpoit */
message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = 41;
message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
message_put(message);
new_state(PORT_STATE_RELEASE);
trigger_work(&p_s_delete);
return 0;
}
/* apply handle */
sip_trace_header(this, "NEW handle", DIRECTION_IN);
add_trace("handle", "new", "0x%x", p_s_handle);
end_trace();
if (!p_s_rtp_ip_local) {
char *p;