--- /dev/null
+/*****************************************************************************\
+** **
+** 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>
+
+unsigned char flip[256];
+
+//pthread_mutex_t mutex_msg;
+su_home_t sip_home[1];
+
+struct sip_inst {
+ struct interface *interface;
+ su_root_t *root;
+ nua_t *nua;
+};
+
+static int delete_event(struct lcr_work *work, void *instance, int index);
+
+/*
+ * initialize SIP port
+ */
+Psip::Psip(int type, struct mISDNport *mISDNport, char *portname, struct port_settings *settings, int channel, int exclusive, int mode, struct interface *interface) : PmISDN(type, mISDNport, portname, settings, channel, exclusive, mode)
+{
+ p_m_s_sip_inst = interface->sip_inst;
+ memset(&p_m_s_delete, 0, sizeof(p_m_s_delete));
+ add_work(&p_m_s_delete, delete_event, this, 0);
+ p_m_s_handle = 0;
+ p_m_s_magic = 0;
+ memset(&p_m_s_rtp_fd, 0, sizeof(p_m_s_rtp_fd));
+ memset(&p_m_s_rtcp_fd, 0, sizeof(p_m_s_rtcp_fd));
+ memset(&p_m_s_rtp_sin_local, 0, sizeof(p_m_s_rtp_sin_local));
+ memset(&p_m_s_rtcp_sin_local, 0, sizeof(p_m_s_rtcp_sin_local));
+ memset(&p_m_s_rtp_sin_remote, 0, sizeof(p_m_s_rtp_sin_remote));
+ memset(&p_m_s_rtcp_sin_remote, 0, sizeof(p_m_s_rtcp_sin_remote));
+ p_m_s_rtp_ip_local = 0;
+ p_m_s_rtp_ip_remote = 0;
+ p_m_s_rtp_port_local = 0;
+ p_m_s_rtp_port_remote = 0;
+ p_m_s_b_sock = -1;
+ p_m_s_b_index = -1;
+ p_m_s_b_active = 0;
+ p_m_s_rxpos = 0;
+ p_m_s_rtp_tx_action = 0;
+
+ PDEBUG(DEBUG_SIP, "Created new Psip(%s).\n", portname);
+}
+
+
+/*
+ * destructor
+ */
+Psip::~Psip()
+{
+ PDEBUG(DEBUG_SIP, "Destroyed SIP process(%s).\n", p_name);
+
+ del_work(&p_m_s_delete);
+
+ /* close audio transfer socket */
+ if (p_m_s_b_sock > -1)
+ bchannel_close();
+
+ rtp_close();
+}
+
+
+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 RTP_PT_ULAW 0
+#define RTP_PT_ALAW 8
+#define RTP_PT_GSM_FULL 3
+#define RTP_PT_GSM_HALF 96
+#define RTP_PT_GSM_EFR 97
+#define RTP_PT_AMR 98
+
+/* 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;
+
+ 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) {
+ 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_ALAW:
+ if (options.law != 'a') {
+ PDEBUG(DEBUG_SIP, "received Alaw, but we don't do Alaw\n");
+ return -EINVAL;
+ }
+ break;
+ case RTP_PT_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;
+ }
+
+ psip->bchannel_send(PH_DATA_REQ, 0, 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;
+ }
+ 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!");
+ }
+
+ return 0;
+}
+
+#define RTP_PORT_BASE 30000
+static unsigned int 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;
+ struct in_addr ia;
+ unsigned int ip;
+
+ /* create socket */
+ rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (!rc) {
+ rtp_close();
+ return -EIO;
+ }
+ p_m_s_rtp_fd.fd = rc;
+ register_fd(&p_m_s_rtp_fd, LCR_FD_READ, rtp_sock_callback, this, 0);
+
+ rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (!rc) {
+ rtp_close();
+ return -EIO;
+ }
+ p_m_s_rtcp_fd.fd = rc;
+ register_fd(&p_m_s_rtcp_fd, LCR_FD_READ, rtcp_sock_callback, this, 0);
+
+ /* bind socket */
+ ip = htonl(INADDR_ANY);
+ ia.s_addr = ip;
+ for (next_udp_port = next_udp_port % 0xffff;
+ next_udp_port < 0xffff; next_udp_port += 2) {
+ rc = rtp_sub_socket_bind(p_m_s_rtp_fd.fd, &p_m_s_rtp_sin_local, ip, next_udp_port);
+ if (rc != 0)
+ continue;
+
+ rc = rtp_sub_socket_bind(p_m_s_rtcp_fd.fd, &p_m_s_rtcp_sin_local, ip, next_udp_port+1);
+ if (rc == 0)
+ break;
+ }
+ if (rc < 0) {
+ PDEBUG(DEBUG_SIP, "failed to find port\n");
+ rtp_close();
+ return rc;
+ }
+ p_m_s_rtp_port_local = next_udp_port;
+ p_m_s_rtp_ip_local = ntohl(p_m_s_rtp_sin_local.sin_addr.s_addr);
+ PDEBUG(DEBUG_SIP, "local ip %08x port %d\n", p_m_s_rtp_ip_local, p_m_s_rtp_port_local);
+ PDEBUG(DEBUG_SIP, "remote ip %08x port %d\n", p_m_s_rtp_ip_remote, p_m_s_rtp_port_remote);
+
+ return p_m_s_rtp_port_local;
+}
+
+int Psip::rtp_connect(void)
+{
+ int rc;
+ struct in_addr ia;
+
+ ia.s_addr = htonl(p_m_s_rtp_ip_remote);
+ PDEBUG(DEBUG_SIP, "rtp_connect(ip=%s, port=%u)\n", inet_ntoa(ia), p_m_s_rtp_port_remote);
+
+ rc = rtp_sub_socket_connect(p_m_s_rtp_fd.fd, &p_m_s_rtp_sin_local, &p_m_s_rtp_sin_remote, p_m_s_rtp_ip_remote, p_m_s_rtp_port_remote);
+ if (rc < 0)
+ return rc;
+
+ rc = rtp_sub_socket_connect(p_m_s_rtcp_fd.fd, &p_m_s_rtcp_sin_local, &p_m_s_rtcp_sin_remote, p_m_s_rtp_ip_remote, p_m_s_rtp_port_remote + 1);
+ if (rc < 0)
+ return rc;
+
+ p_m_s_rtp_ip_local = ntohl(p_m_s_rtp_sin_local.sin_addr.s_addr);
+ PDEBUG(DEBUG_SIP, "local ip %08x port %d\n", p_m_s_rtp_ip_local, p_m_s_rtp_port_local);
+ PDEBUG(DEBUG_SIP, "remote ip %08x port %d\n", p_m_s_rtp_ip_remote, p_m_s_rtp_port_remote);
+ p_m_s_rtp_is_connected = 1;
+
+ return 0;
+}
+void Psip::rtp_close(void)
+{
+ if (p_m_s_rtp_fd.fd > 0) {
+ unregister_fd(&p_m_s_rtp_fd);
+ close(p_m_s_rtp_fd.fd);
+ p_m_s_rtp_fd.fd = 0;
+ }
+ if (p_m_s_rtcp_fd.fd > 0) {
+ unregister_fd(&p_m_s_rtcp_fd);
+ close(p_m_s_rtcp_fd.fd);
+ p_m_s_rtcp_fd.fd = 0;
+ }
+ if (p_m_s_rtp_is_connected) {
+ PDEBUG(DEBUG_SIP, "rtp closed\n");
+ p_m_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, int payload_type)
+{
+ struct rtp_hdr *rtph;
+ int payload_len;
+ int duration; /* in samples */
+ unsigned char buffer[256];
+
+ if (!p_m_s_rtp_is_connected) {
+ /* drop silently */
+ return 0;
+ }
+
+ if (!p_m_s_rtp_tx_action) {
+ /* initialize sequences */
+ p_m_s_rtp_tx_action = 1;
+ p_m_s_rtp_tx_ssrc = rand();
+ p_m_s_rtp_tx_sequence = random();
+ p_m_s_rtp_tx_timestamp = random();
+ memset(&p_m_s_rtp_tx_last_tv, 0, sizeof(p_m_s_rtp_tx_last_tv));
+ }
+
+ switch (payload_type) {
+ 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_ALAW:
+ case RTP_PT_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_m_s_rtp_tx_last_tv, &tv);
+ p_m_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_m_s_rtp_tx_sequence += frame_diff_excess;
+ p_m_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_m_s_rtp_tx_sequence++);
+ rtph->timestamp = htonl(p_m_s_rtp_tx_timestamp);
+ p_m_s_rtp_tx_timestamp += duration;
+ rtph->ssrc = htonl(p_m_s_rtp_tx_ssrc);
+ memcpy(buffer + sizeof(struct rtp_hdr), data, payload_len);
+
+ if (p_m_s_rtp_fd.fd > 0) {
+ len = write(p_m_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;
+}
+
+/*
+ * bchannel handling
+ */
+
+/* select free bchannel from loopback interface */
+int Psip::hunt_bchannel(void)
+{
+ return loop_hunt_bchannel(this, p_m_mISDNport);
+}
+
+/* close SIP side bchannel */
+void Psip::bchannel_close(void)
+{
+ if (p_m_s_b_sock > -1) {
+ unregister_fd(&p_m_s_b_fd);
+ close(p_m_s_b_sock);
+ }
+ p_m_s_b_sock = -1;
+ p_m_s_b_index = -1;
+ p_m_s_b_active = 0;
+}
+
+static int b_handler(struct lcr_fd *fd, unsigned int what, void *instance, int index);
+
+/* open external side bchannel */
+int Psip::bchannel_open(int index)
+{
+ int ret;
+ struct sockaddr_mISDN addr;
+ struct mISDNhead act;
+
+ if (p_m_s_b_sock > -1) {
+ PERROR("Socket already created for index %d\n", index);
+ return(-EIO);
+ }
+
+ /* open socket */
+ ret = p_m_s_b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
+ if (ret < 0) {
+ PERROR("Failed to open bchannel-socket for index %d\n", index);
+ bchannel_close();
+ return(ret);
+ }
+ memset(&p_m_s_b_fd, 0, sizeof(p_m_s_b_fd));
+ p_m_s_b_fd.fd = p_m_s_b_sock;
+ register_fd(&p_m_s_b_fd, LCR_FD_READ, b_handler, this, 0);
+
+
+ /* bind socket to bchannel */
+ addr.family = AF_ISDN;
+ addr.dev = mISDNloop.port;
+ addr.channel = index+1+(index>15);
+ ret = bind(p_m_s_b_sock, (struct sockaddr *)&addr, sizeof(addr));
+ if (ret < 0) {
+ PERROR("Failed to bind bchannel-socket for index %d\n", index);
+ bchannel_close();
+ return(ret);
+ }
+ /* activate bchannel */
+ PDEBUG(DEBUG_SIP, "Activating SIP side channel index %i.\n", index);
+ act.prim = PH_ACTIVATE_REQ;
+ act.id = 0;
+ ret = sendto(p_m_s_b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
+ if (ret < 0) {
+ PERROR("Failed to activate index %d\n", index);
+ bchannel_close();
+ return(ret);
+ }
+
+ p_m_s_b_index = index;
+
+ return(0);
+}
+
+/* receive from bchannel */
+void Psip::bchannel_receive(struct mISDNhead *hh, unsigned char *data, int len)
+{
+ /* write to rx buffer */
+ while(len--) {
+ p_m_s_rxdata[p_m_s_rxpos++] = flip[*data++];
+ if (p_m_s_rxpos == 160) {
+ p_m_s_rxpos = 0;
+
+ /* transmit data via rtp */
+ rtp_send_frame(p_m_s_rxdata, 160, (options.law=='a')?RTP_PT_ALAW:RTP_PT_ULAW);
+ }
+ }
+}
+
+/* transmit to bchannel */
+void Psip::bchannel_send(unsigned int prim, unsigned int id, unsigned char *data, int len)
+{
+ unsigned char buf[MISDN_HEADER_LEN+len];
+ struct mISDNhead *hh = (struct mISDNhead *)buf;
+ unsigned char *to = buf + MISDN_HEADER_LEN;
+ int n = len;
+ int ret;
+
+ if (!p_m_s_b_active)
+ return;
+
+ /* make and send frame */
+ hh->prim = prim;
+ hh->id = 0;
+ while(n--)
+ *to++ = flip[*data++];
+ ret = sendto(p_m_s_b_sock, buf, MISDN_HEADER_LEN+len, 0, NULL, 0);
+ if (ret <= 0)
+ PERROR("Failed to send to socket index %d\n", p_m_s_b_index);
+}
+
+/* handle socket input */
+static int b_handler(struct lcr_fd *fd, unsigned int what, void *instance, int index)
+{
+ class Psip *psip = (class Psip *)instance;
+ int ret;
+ unsigned char buffer[2048+MISDN_HEADER_LEN];
+ struct mISDNhead *hh = (struct mISDNhead *)buffer;
+
+ /* handle message from bchannel */
+ if (psip->p_m_s_b_sock > -1) {
+ ret = recv(psip->p_m_s_b_sock, buffer, sizeof(buffer), 0);
+ if (ret >= (int)MISDN_HEADER_LEN) {
+ switch(hh->prim) {
+ /* we don't care about confirms, we use rx data to sync tx */
+ case PH_DATA_CNF:
+ break;
+ /* we receive audio data, we respond to it AND we send tones */
+ case PH_DATA_IND:
+ psip->bchannel_receive(hh, buffer+MISDN_HEADER_LEN, ret-MISDN_HEADER_LEN);
+ break;
+ case PH_ACTIVATE_IND:
+ psip->p_m_s_b_active = 1;
+ break;
+ case PH_DEACTIVATE_IND:
+ psip->p_m_s_b_active = 0;
+ break;
+ }
+ } else {
+ if (ret < 0 && errno != EWOULDBLOCK)
+ PERROR("Read from GSM port, index %d failed with return code %d\n", ret);
+ }
+ }
+
+ 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;
+
+ if (rtp_connect() < 0) {
+ nua_cancel(p_m_s_handle, TAG_END());
+ nua_handle_destroy(p_m_s_handle);
+ p_m_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_m_s_delete);
+ return 0;
+ }
+ ia.s_addr = htonl(p_m_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_m_s_rtp_port_local, (options.law=='a')?RTP_PT_ALAW:RTP_PT_ULAW, (options.law=='a')?RTP_PT_ALAW:RTP_PT_ULAW, (options.law=='a')?"PCMA":"PCMU");
+ PDEBUG(DEBUG_SIP, "Using SDP response: %s\n", sdp_str);
+
+ nua_respond(p_m_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");
+ 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_m_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_m_s_handle, status, status_text, TAG_IF(cause_str[0], SIPTAG_REASON_STR(cause_str)), TAG_END());
+ nua_handle_destroy(p_m_s_handle);
+ p_m_s_handle = NULL;
+ trigger_work(&p_m_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_m_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_m_s_sip_inst;
+ char from[128];
+ char to[128];
+ const char *local = inst->interface->sip_local_ip;
+ const char *remote = inst->interface->sip_remote_ip;
+ char sdp_str[256];
+ struct in_addr ia;
+ struct epoint_list *epointlist;
+ sip_cseq_t *cseq = NULL;
+ int ret;
+ int channel;
+
+ PDEBUG(DEBUG_SIP, "Doing Setup (inst %p)\n", inst);
+
+ /* release if port is blocked */
+ if (p_m_mISDNport->ifport->block) {
+ struct lcr_msg *message;
+
+ sip_trace_header(this, "INVITE", DIRECTION_OUT);
+ add_trace("failure", NULL, "Port blocked.");
+ end_trace();
+ message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
+ message->param.disconnectinfo.cause = 27; // temp. unavail.
+ message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
+ message_put(message);
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+ return 0;
+ }
+
+ /* hunt channel */
+ ret = channel = hunt_bchannel();
+ if (ret < 0)
+ goto no_channel;
+ /* open channel */
+ ret = seize_bchannel(channel, 1);
+ if (ret < 0) {
+ struct lcr_msg *message;
+
+ no_channel:
+ sip_trace_header(this, "INVITE", DIRECTION_OUT);
+ add_trace("failure", NULL, "No internal audio channel available.");
+ end_trace();
+ message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
+ message->param.disconnectinfo.cause = 34;
+ message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
+ message_put(message);
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+ return 0;
+ }
+ bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
+ if (bchannel_open(p_m_b_index))
+ goto no_channel;
+
+ 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));
+
+ /* connect to remote RTP */
+ if (rtp_open() < 0) {
+ struct lcr_msg *message;
+
+ 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_m_s_delete);
+ return 0;
+ }
+ SPRINT(from, "sip:%s@%s", param->setup.callerinfo.id, local);
+ SPRINT(to, "sip:%s@%s", param->setup.dialinginfo.id, remote);
+
+ sip_trace_header(this, "INVITE", DIRECTION_OUT);
+ add_trace("from", "uri", "%s", from);
+ add_trace("to", "uri", "%s", to);
+ add_trace("rtp", "port", "%d,%d", p_m_s_rtp_port_local, p_m_s_rtp_port_local + 1);
+ end_trace();
+
+ p_m_s_handle = nua_handle(inst->nua, NULL, TAG_END());
+ if (!p_m_s_handle) {
+ struct lcr_msg *message;
+
+ 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_m_s_delete);
+ return 0;
+ }
+ /* apply handle */
+ sip_trace_header(this, "NEW handle", DIRECTION_IN);
+ add_trace("handle", "new", "0x%x", p_m_s_handle);
+ end_trace();
+
+ inet_pton(AF_INET, local, &p_m_s_rtp_ip_local);
+ p_m_s_rtp_ip_local = ntohl(p_m_s_rtp_ip_local);
+ ia.s_addr = htonl(p_m_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_m_s_rtp_port_local, (options.law=='a')?RTP_PT_ALAW:RTP_PT_ULAW, (options.law=='a')?RTP_PT_ALAW:RTP_PT_ULAW, (options.law=='a')?"PCMA":"PCMU");
+ PDEBUG(DEBUG_SIP, "Using SDP for invite: %s\n", sdp_str);
+
+// cseq = sip_cseq_create(sip_home, 123, SIP_METHOD_INVITE);
+
+ nua_invite(p_m_s_handle,
+ TAG_IF(from[0], SIPTAG_FROM_STR(from)),
+ TAG_IF(to[0], SIPTAG_TO_STR(to)),
+ TAG_IF(cseq, SIPTAG_CSEQ(cseq)),
+ NUTAG_MEDIA_ENABLE(0),
+ SIPTAG_CONTENT_TYPE_STR("application/sdp"),
+ SIPTAG_PAYLOAD_STR(sdp_str), TAG_END());
+ new_state(PORT_STATE_OUT_SETUP);
+
+ /* attach only if not already */
+ epointlist = p_epointlist;
+ while(epointlist) {
+ if (epointlist->epoint_id == epoint_id)
+ break;
+ epointlist = epointlist->next;
+ }
+ if (!epointlist)
+ epointlist_new(epoint_id);
+
+ return 0;
+}
+
+int Psip::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
+{
+ class Endpoint *epoint;
+
+ if (PmISDN::message_epoint(epoint_id, message_id, param))
+ return(1);
+
+ epoint = find_epoint_id(epoint_id);
+ if (!epoint) {
+ PDEBUG(DEBUG_SIP, "PORT(%s) no endpoint object found where the message is from.\n", p_name);
+ return(0);
+ }
+
+ switch(message_id) {
+ case MESSAGE_DATA:
+ return(1);
+
+ case MESSAGE_ALERTING: /* call is ringing on LCR side */
+ if (p_state != PORT_STATE_IN_SETUP
+ && p_state != PORT_STATE_IN_PROCEEDING)
+ return 0;
+ nua_respond(p_m_s_handle, SIP_180_RINGING, TAG_END());
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ add_trace("respond", "value", "180 Ringing");
+ end_trace();
+ new_state(PORT_STATE_IN_ALERTING);
+ return(1);
+
+ case MESSAGE_CONNECT: /* call is connected on LCR side */
+ if (p_state != PORT_STATE_IN_SETUP
+ && p_state != PORT_STATE_IN_PROCEEDING
+ && p_state != PORT_STATE_IN_ALERTING)
+ return 0;
+ message_connect(epoint_id, message_id, param);
+ return(1);
+
+ case MESSAGE_DISCONNECT: /* call has been disconnected */
+ case MESSAGE_RELEASE: /* call has been released */
+ message_release(epoint_id, message_id, param);
+ return(1);
+
+ case MESSAGE_SETUP: /* dial-out command received from epoint */
+ message_setup(epoint_id, message_id, param);
+ return(1);
+
+ default:
+ PDEBUG(DEBUG_SIP, "PORT(%s) SP port with (caller id %s) received an unsupported message: %d\n", p_name, p_callerinfo.id, message_id);
+ }
+
+ return(0);
+}
+
+int Psip::parse_sdp(sip_t const *sip, unsigned int *ip, unsigned short *port)
+{
+ int codec_supported = 0;
+
+ if (!sip->sip_payload) {
+ PDEBUG(DEBUG_SIP, "no payload given\n");
+ return 0;
+ }
+
+ sdp_parser_t *parser;
+ sdp_session_t *sdp;
+ sdp_media_t *m;
+ sdp_attribute_t *attr;
+ sdp_rtpmap_t *map;
+ sdp_connection_t *conn;
+
+ PDEBUG(DEBUG_SIP, "payload given: %s\n", sip->sip_payload->pl_data);
+
+ parser = sdp_parse(NULL, sip->sip_payload->pl_data, (int) strlen(sip->sip_payload->pl_data), 0);
+ if (!parser) {
+ return 400;
+ }
+ if (!(sdp = sdp_session(parser))) {
+ sdp_parser_free(parser);
+ return 400;
+ }
+ for (m = sdp->sdp_media; m; m = m->m_next) {
+ if (m->m_proto != sdp_proto_rtp)
+ continue;
+ if (m->m_type != sdp_media_audio)
+ continue;
+ PDEBUG(DEBUG_SIP, "RTP port:'%u'\n", m->m_port);
+ *port = m->m_port;
+ for (attr = m->m_attributes; attr; attr = attr->a_next) {
+ PDEBUG(DEBUG_SIP, "ATTR: name:'%s' value='%s'\n", attr->a_name, attr->a_value);
+ }
+ if (m->m_connections) {
+ conn = m->m_connections;
+ PDEBUG(DEBUG_SIP, "CONN: address:'%s'\n", conn->c_address);
+ inet_pton(AF_INET, conn->c_address, ip);
+ *ip = ntohl(p_m_s_rtp_ip_remote);
+ } else {
+ char *p = sip->sip_payload->pl_data;
+ char addr[16];
+
+ PDEBUG(DEBUG_SIP, "sofia cannot find connection tag, so we try ourself\n");
+ p = strstr(p, "c=IN IP4 ");
+ if (!p) {
+ PDEBUG(DEBUG_SIP, "missing c-tag with internet address\n");
+ sdp_parser_free(parser);
+ return 400;
+ }
+ SCPY(addr, p + 9);
+ if ((p = strchr(addr, '\n'))) *p = '\0';
+ if ((p = strchr(addr, '\r'))) *p = '\0';
+ PDEBUG(DEBUG_SIP, "CONN: address:'%s'\n", addr);
+ inet_pton(AF_INET, addr, ip);
+ *ip = ntohl(p_m_s_rtp_ip_remote);
+ }
+ for (map = m->m_rtpmaps; map; map = map->rm_next) {
+ PDEBUG(DEBUG_SIP, "RTPMAP: coding:'%s' rate='%d'\n", map->rm_encoding, map->rm_rate);
+ if (!strcmp(map->rm_encoding, (options.law=='a')?"PCMA":"PCMU") && map->rm_rate == 8000) {
+ PDEBUG(DEBUG_SIP, "supported codec found\n");
+ codec_supported = 1;
+ goto done_codec;
+ }
+ }
+ }
+ done_codec:
+
+ sdp_parser_free(parser);
+
+ if (!codec_supported)
+ return 415;
+
+ return 0;
+}
+
+void Psip::i_invite(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tagss[])
+{
+ const char *from = "", *to = "";
+ int ret;
+ class Endpoint *epoint;
+ struct lcr_msg *message;
+ int channel;
+
+ if (sip->sip_from && sip->sip_from->a_url)
+ from = sip->sip_from->a_url->url_user;
+ if (sip->sip_to && sip->sip_to->a_url)
+ to = sip->sip_to->a_url->url_user;
+ PDEBUG(DEBUG_SIP, "invite received (%s->%s)\n", from, to);
+
+ ret = parse_sdp(sip, &p_m_s_rtp_ip_remote, &p_m_s_rtp_port_remote);
+ if (ret) {
+ if (ret == 400)
+ nua_respond(nh, SIP_400_BAD_REQUEST, TAG_END());
+ else
+ nua_respond(nh, SIP_415_UNSUPPORTED_MEDIA, TAG_END());
+ nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ if (ret == 400)
+ add_trace("respond", "value", "415 Unsupported Media");
+ else
+ add_trace("respond", "value", "400 Bad Request");
+ add_trace("reason", NULL, "offered codec does not match");
+ end_trace();
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+ return;
+ }
+
+ /* connect to remote RTP */
+ if (rtp_open() < 0) {
+ nua_respond(nh, SIP_500_INTERNAL_SERVER_ERROR, TAG_END());
+ nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ add_trace("respond", "value", "500 Internal Server Error");
+ add_trace("reason", NULL, "failed to open RTP/RTCP sockts");
+ end_trace();
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+ return;
+ }
+
+ /* apply handle */
+ sip_trace_header(this, "NEW handle", DIRECTION_IN);
+ add_trace("handle", "new", "0x%x", nh);
+ p_m_s_handle = nh;
+ end_trace();
+
+ /* if blocked, release call */
+ if (p_m_mISDNport->ifport->block) {
+ nua_respond(nh, SIP_503_SERVICE_UNAVAILABLE, TAG_END());
+ nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ add_trace("respond", "value", "503 Service Unavailable");
+ add_trace("reason", NULL, "port is blocked");
+ end_trace();
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+ return;
+ }
+ sip_trace_header(this, "INVITE", DIRECTION_IN);
+ add_trace("RTP", "port", "%d", p_m_s_rtp_port_remote);
+ /* caller information */
+ if (!from[0]) {
+ p_callerinfo.present = INFO_PRESENT_NOTAVAIL;
+ p_callerinfo.ntype = INFO_NTYPE_NOTPRESENT;
+ add_trace("calling", "present", "unavailable");
+ } else {
+ p_callerinfo.present = INFO_PRESENT_ALLOWED;
+ add_trace("calling", "present", "allowed");
+ p_callerinfo.screen = INFO_SCREEN_NETWORK;
+ p_callerinfo.ntype = INFO_NTYPE_UNKNOWN;
+ SCPY(p_callerinfo.id, from);
+ add_trace("calling", "number", "%s", from);
+ }
+ p_callerinfo.isdn_port = p_m_portnum;
+ SCPY(p_callerinfo.interface, p_m_mISDNport->ifport->interface->name);
+ /* dialing information */
+ if (to[0]) {
+ p_dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
+ SCAT(p_dialinginfo.id, to);
+ add_trace("dialing", "number", "%s", to);
+ }
+ /* redir info */
+ /* bearer capability */
+ p_capainfo.bearer_capa = INFO_BC_SPEECH;
+ p_capainfo.bearer_info1 = (options.law=='a')?3:2;
+ p_capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
+ add_trace("bearer", "capa", "speech");
+ add_trace("bearer", "mode", "circuit");
+ /* if packet mode works some day, see dss1.cpp for conditions */
+ p_capainfo.source_mode = B_MODE_TRANSPARENT;
+
+ end_trace();
+
+ /* hunt channel */
+ ret = channel = hunt_bchannel();
+ if (ret < 0)
+ goto no_channel;
+
+ /* open channel */
+ ret = seize_bchannel(channel, 1);
+ if (ret < 0) {
+ no_channel:
+ nua_respond(nh, SIP_480_TEMPORARILY_UNAVAILABLE, TAG_END());
+ nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ add_trace("respond", "value", "480 Temporarily Unavailable");
+ add_trace("reason", NULL, "no channel");
+ end_trace();
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+ return;
+ }
+ bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
+ if (bchannel_open(p_m_b_index))
+ goto no_channel;
+
+ /* create endpoint */
+ if (p_epointlist)
+ FATAL("Incoming call but already got an endpoint.\n");
+ if (!(epoint = new Endpoint(p_serial, 0)))
+ FATAL("No memory for Endpoint instance\n");
+ if (!(epoint->ep_app = new DEFAULT_ENDPOINT_APP(epoint, 0))) //incoming
+ FATAL("No memory for Endpoint Application instance\n");
+ epointlist_new(epoint->ep_serial);
+
+ /* send trying (proceeding) */
+ nua_respond(nh, SIP_100_TRYING, TAG_END());
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ add_trace("respond", "value", "100 Trying");
+ end_trace();
+
+ new_state(PORT_STATE_IN_PROCEEDING);
+
+ /* send setup message to endpoit */
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_SETUP);
+ message->param.setup.isdn_port = p_m_portnum;
+ message->param.setup.port_type = p_type;
+// message->param.setup.dtmf = 0;
+ memcpy(&message->param.setup.dialinginfo, &p_dialinginfo, sizeof(struct dialing_info));
+ memcpy(&message->param.setup.callerinfo, &p_callerinfo, sizeof(struct caller_info));
+ memcpy(&message->param.setup.capainfo, &p_capainfo, sizeof(struct capa_info));
+// SCPY((char *)message->param.setup.useruser.data, useruser.info);
+// message->param.setup.useruser.len = strlen(mncc->useruser.info);
+// message->param.setup.useruser.protocol = mncc->useruser.proto;
+ message_put(message);
+}
+
+void Psip::i_bye(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tagss[])
+{
+ struct lcr_msg *message;
+ int cause = 0;
+
+ PDEBUG(DEBUG_SIP, "bye received\n");
+
+ sip_trace_header(this, "BYE", DIRECTION_IN);
+ if (sip->sip_reason && sip->sip_reason->re_protocol && !strcasecmp(sip->sip_reason->re_protocol, "Q.850") && sip->sip_reason->re_cause) {
+ cause = atoi(sip->sip_reason->re_cause);
+ add_trace("cause", "value", "%d", cause);
+ }
+ end_trace();
+
+// let stack do bye automaticall, since it will not accept our response for some reason
+// nua_respond(nh, SIP_200_OK, TAG_END());
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ add_trace("respond", "value", "200 OK");
+ end_trace();
+// nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+
+ rtp_close();
+
+ while(p_epointlist) {
+ /* send setup message to endpoit */
+ message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
+ message->param.disconnectinfo.cause = cause ? : 16;
+ message->param.disconnectinfo.location = LOCATION_BEYOND;
+ message_put(message);
+ /* remove epoint */
+ free_epointlist(p_epointlist);
+ }
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+}
+
+void Psip::i_cancel(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tagss[])
+{
+ struct lcr_msg *message;
+
+ PDEBUG(DEBUG_SIP, "cancel received\n");
+
+ sip_trace_header(this, "CANCEL", DIRECTION_IN);
+ end_trace();
+
+ nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+
+ rtp_close();
+
+ while(p_epointlist) {
+ /* send setup message to endpoit */
+ message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
+ message->param.disconnectinfo.cause = 16;
+ message->param.disconnectinfo.location = LOCATION_BEYOND;
+ message_put(message);
+ /* remove epoint */
+ free_epointlist(p_epointlist);
+ }
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+}
+
+void Psip::r_bye(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tagss[])
+{
+ PDEBUG(DEBUG_SIP, "bye response received\n");
+
+ nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+
+ rtp_close();
+
+ trigger_work(&p_m_s_delete);
+}
+
+void Psip::r_cancel(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tagss[])
+{
+ PDEBUG(DEBUG_SIP, "cancel response received\n");
+
+ nua_handle_destroy(nh);
+ p_m_s_handle = NULL;
+
+ rtp_close();
+
+ trigger_work(&p_m_s_delete);
+}
+
+void Psip::r_invite(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tagss[])
+{
+ struct lcr_msg *message;
+ int cause = 0, location = 0;
+
+ PDEBUG(DEBUG_SIP, "response to invite received (status = %d)\n", status);
+
+ sip_trace_header(this, "RESPOND", DIRECTION_OUT);
+ add_trace("respond", "value", "%d", status);
+ end_trace();
+
+ /* process 1xx */
+ switch (status) {
+ case 100:
+ PDEBUG(DEBUG_SIP, "do proceeding\n");
+ new_state(PORT_STATE_OUT_PROCEEDING);
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
+ message_put(message);
+ return;
+ case 180:
+ PDEBUG(DEBUG_SIP, "do alerting\n");
+ new_state(PORT_STATE_OUT_ALERTING);
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
+ message_put(message);
+ return;
+ default:
+ if (status < 100 || status > 199)
+ break;
+ PDEBUG(DEBUG_SIP, "skipping 1xx message\n");
+
+ return;
+ }
+
+ /* process 2xx */
+ if (status >= 200 && status <= 299) {
+ int ret;
+
+ ret = parse_sdp(sip, &p_m_s_rtp_ip_remote, &p_m_s_rtp_port_remote);
+ if (ret) {
+ if (ret == 400)
+ nua_cancel(nh, TAG_END());
+ else
+ nua_cancel(nh, TAG_END());
+ sip_trace_header(this, "CANCEL", DIRECTION_OUT);
+ add_trace("reason", NULL, "offered codec does not match");
+ end_trace();
+ cause = 88;
+ location = LOCATION_PRIVATE_LOCAL;
+ goto release_with_cause;
+ }
+
+ /* connect to remote RTP */
+ if (rtp_connect() < 0) {
+ nua_cancel(nh, TAG_END());
+ sip_trace_header(this, "CANCEL", DIRECTION_OUT);
+ add_trace("reason", NULL, "failed to open RTP/RTCP sockts");
+ end_trace();
+ cause = 31;
+ location = LOCATION_PRIVATE_LOCAL;
+ goto release_with_cause;
+ }
+
+ PDEBUG(DEBUG_SIP, "do connect\n");
+ nua_ack(nh, TAG_END());
+ new_state(PORT_STATE_CONNECT);
+ message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
+ message_put(message);
+
+ return;
+ }
+
+ cause = status2cause(status);
+ location = LOCATION_BEYOND;
+
+release_with_cause:
+ PDEBUG(DEBUG_SIP, "do release (cause %d)\n", cause);
+
+ while(p_epointlist) {
+ /* send setup message to endpoit */
+ message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
+ message->param.disconnectinfo.cause = cause;
+ message->param.disconnectinfo.location = location;
+ message_put(message);
+ /* remove epoint */
+ free_epointlist(p_epointlist);
+ }
+
+ new_state(PORT_STATE_RELEASE);
+
+ rtp_close();
+
+ trigger_work(&p_m_s_delete);
+}
+
+static void sip_callback(nua_event_t event, int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[])
+{
+ struct sip_inst *inst = (struct sip_inst *) magic;
+ class Port *port;
+ class Psip *psip = NULL;
+
+ PDEBUG(DEBUG_SIP, "Event %d from stack received (handle=%p)\n", event, nh);
+ if (!nh)
+ return;
+
+ /* create or find port instance */
+ if (event == nua_i_invite)
+ {
+ char name[64];
+ /* create call instance */
+ SPRINT(name, "%s-%d-in", inst->interface->name, 0);
+ if (!(psip = new Psip(PORT_TYPE_SIP_IN, (inst->interface->ifport) ? inst->interface->ifport->mISDNport : NULL, name, NULL, 0, 0, B_MODE_TRANSPARENT, inst->interface)))
+ FATAL("Cannot create Port instance.\n");
+ } else {
+ port = port_first;
+ while(port) {
+ if ((port->p_type & PORT_CLASS_mISDN_MASK) == PORT_CLASS_SIP) {
+ psip = (class Psip *)port;
+ if (psip->p_m_s_handle == nh) {
+ break;
+ }
+ }
+ port = port->next;
+ }
+ }
+ if (!psip) {
+ PERROR("no SIP Port found for handel %p\n", nh);
+ nua_respond(nh, SIP_500_INTERNAL_SERVER_ERROR, TAG_END());
+ nua_handle_destroy(nh);
+ return;
+ }
+
+ switch (event) {
+ case nua_r_set_params:
+ PDEBUG(DEBUG_SIP, "setparam response\n");
+ break;
+ case nua_i_error:
+ PDEBUG(DEBUG_SIP, "error received\n");
+ break;
+ case nua_i_state:
+ PDEBUG(DEBUG_SIP, "state change received\n");
+ break;
+ case nua_i_register:
+ PDEBUG(DEBUG_SIP, "register received\n");
+ break;
+ case nua_i_invite:
+ psip->i_invite(status, phrase, nua, magic, nh, hmagic, sip, tags);
+ break;
+ case nua_i_ack:
+ PDEBUG(DEBUG_SIP, "ack received\n");
+ break;
+ case nua_i_active:
+ PDEBUG(DEBUG_SIP, "active received\n");
+ break;
+ case nua_i_bye:
+ psip->i_bye(status, phrase, nua, magic, nh, hmagic, sip, tags);
+ break;
+ case nua_i_cancel:
+ psip->i_cancel(status, phrase, nua, magic, nh, hmagic, sip, tags);
+ break;
+ case nua_r_bye:
+ psip->r_bye(status, phrase, nua, magic, nh, hmagic, sip, tags);
+ break;
+ case nua_r_cancel:
+ psip->r_cancel(status, phrase, nua, magic, nh, hmagic, sip, tags);
+ break;
+ case nua_r_invite:
+ psip->r_invite(status, phrase, nua, magic, nh, hmagic, sip, tags);
+ break;
+ case nua_i_terminated:
+ PDEBUG(DEBUG_SIP, "terminated received\n");
+ break;
+ default:
+ PDEBUG(DEBUG_SIP, "Event %d not handled\n", event);
+ }
+}
+
+/* received shutdown due to termination of RTP */
+void Psip::rtp_shutdown(void)
+{
+ struct lcr_msg *message;
+
+ PDEBUG(DEBUG_SIP, "RTP stream terminated\n");
+
+ sip_trace_header(this, "RTP terminated", DIRECTION_IN);
+ end_trace();
+
+ nua_handle_destroy(p_m_s_handle);
+ p_m_s_handle = NULL;
+
+ while(p_epointlist) {
+ /* send setup message to endpoit */
+ message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
+ message->param.disconnectinfo.cause = 16;
+ message->param.disconnectinfo.location = LOCATION_BEYOND;
+ message_put(message);
+ /* remove epoint */
+ free_epointlist(p_epointlist);
+ }
+ new_state(PORT_STATE_RELEASE);
+ trigger_work(&p_m_s_delete);
+}
+
+int sip_init_inst(struct interface *interface)
+{
+ struct sip_inst *inst = (struct sip_inst *) MALLOC(sizeof(*inst));
+
+ interface->sip_inst = inst;
+ inst->interface = interface;
+
+ /* init root object */
+ inst->root = su_root_create(inst);
+ if (!inst->root) {
+ PERROR("Failed to create SIP root\n");
+ sip_exit_inst(interface);
+ return -EINVAL;
+ }
+
+ inst->nua = nua_create(inst->root, sip_callback, inst, TAG_NULL());
+ if (!inst->nua) {
+ PERROR("Failed to create SIP stack object\n");
+ sip_exit_inst(interface);
+ return -EINVAL;
+ }
+ nua_set_params(inst->nua,
+ SIPTAG_ALLOW_STR("INVITE,ACK,BYE,CANCEL,OPTIONS,NOTIFY,INFO"),
+ NUTAG_APPL_METHOD("INVITE"),
+ NUTAG_APPL_METHOD("ACK"),
+// NUTAG_APPL_METHOD("BYE"), /* we must reply to BYE */
+ NUTAG_APPL_METHOD("CANCEL"),
+ NUTAG_APPL_METHOD("OPTIONS"),
+ NUTAG_APPL_METHOD("NOTIFY"),
+ NUTAG_APPL_METHOD("INFO"),
+ NUTAG_AUTOACK(0),
+ NUTAG_AUTO100(0),
+ NUTAG_AUTOALERT(0),
+ NUTAG_AUTOANSWER(0),
+ TAG_NULL());
+
+ PDEBUG(DEBUG_SIP, "SIP interface created (inst=%p)\n", inst);
+
+ return 0;
+}
+
+void sip_exit_inst(struct interface *interface)
+{
+ struct sip_inst *inst = (struct sip_inst *) interface->sip_inst;
+
+ if (!inst)
+ return;
+ if (inst->root)
+ su_root_destroy(inst->root);
+ if (inst->nua) {
+ nua_destroy(inst->nua);
+ }
+ FREE(inst, sizeof(*inst));
+ interface->sip_inst = NULL;
+
+ PDEBUG(DEBUG_SIP, "SIP interface removed\n");
+}
+
+extern su_log_t su_log_default[];
+extern su_log_t nua_log[];
+//extern su_log_t soa_log[];
+
+int sip_init(void)
+{
+ int i;
+
+ /* init SOFIA lib */
+ su_init();
+ su_home_init(sip_home);
+
+ if (options.deb & DEBUG_SIP) {
+ su_log_set_level(su_log_default, 9);
+ su_log_set_level(nua_log, 9);
+ //su_log_set_level(soa_log, 9);
+ }
+
+ for (i = 0; i < 256; i++)
+ flip[i] = ((i & 1) << 7) + ((i & 2) << 5) + ((i & 4) << 3) + ((i & 8) << 1) + ((i & 16) >> 1) + ((i & 32) >> 3) + ((i & 64) >> 5) + ((i & 128) >> 7);
+
+ PDEBUG(DEBUG_SIP, "SIP globals initialized\n");
+
+ return 0;
+}
+
+void sip_exit(void)
+{
+ su_home_deinit(sip_home);
+ su_deinit();
+
+ PDEBUG(DEBUG_SIP, "SIP globals de-initialized\n");
+}
+
+void sip_handle(void)
+{
+ struct interface *interface = interface_first;
+ struct sip_inst *inst;
+
+ while (interface) {
+ if (interface->sip_inst) {
+ inst = (struct sip_inst *) interface->sip_inst;
+ su_root_step(inst->root, 0);
+ }
+ interface = interface->next;
+ }
+}
+
+/* deletes when back in event loop */
+static int delete_event(struct lcr_work *work, void *instance, int index)
+{
+ class Psip *psip = (class Psip *)instance;
+
+ delete psip;
+
+ return 0;
+}
+
projects / lcr.git / commitdiff