udptl.h File Reference

UDPTL support for T.38. More...

#include "asterisk/network.h"
#include "asterisk/frame.h"
#include "asterisk/io.h"
#include "asterisk/sched.h"
#include "asterisk/channel.h"

Include dependency graph for udptl.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	ast_udptl_protocol
Typedefs
typedef int(*	ast_udptl_callback )(struct ast_udptl *udptl, struct ast_frame *f, void *data)
Enumerations
enum	ast_t38_ec_modes { UDPTL_ERROR_CORRECTION_NONE, UDPTL_ERROR_CORRECTION_FEC, UDPTL_ERROR_CORRECTION_REDUNDANCY }
Functions
int	ast_udptl_bridge (struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
void	ast_udptl_destroy (struct ast_udptl *udptl)
int	ast_udptl_fd (const struct ast_udptl *udptl)
enum ast_t38_ec_modes	ast_udptl_get_error_correction_scheme (const struct ast_udptl *udptl)
unsigned int	ast_udptl_get_far_max_datagram (const struct ast_udptl *udptl)
unsigned int	ast_udptl_get_far_max_ifp (const struct ast_udptl *udptl)
unsigned int	ast_udptl_get_local_max_datagram (const struct ast_udptl *udptl)
void	ast_udptl_get_peer (const struct ast_udptl *udptl, struct sockaddr_in *them)
void	ast_udptl_get_us (const struct ast_udptl *udptl, struct sockaddr_in *us)
void	ast_udptl_init (void)
struct ast_udptl *	ast_udptl_new (struct sched_context *sched, struct io_context *io, int callbackmode)
struct ast_udptl *	ast_udptl_new_with_bindaddr (struct sched_context *sched, struct io_context *io, int callbackmode, struct in_addr in)
int	ast_udptl_proto_register (struct ast_udptl_protocol *proto)
void	ast_udptl_proto_unregister (struct ast_udptl_protocol *proto)
struct ast_frame *	ast_udptl_read (struct ast_udptl *udptl)
int	ast_udptl_reload (void)
void	ast_udptl_reset (struct ast_udptl *udptl)
void	ast_udptl_set_callback (struct ast_udptl *udptl, ast_udptl_callback callback)
void	ast_udptl_set_data (struct ast_udptl *udptl, void *data)
void	ast_udptl_set_error_correction_scheme (struct ast_udptl *udptl, enum ast_t38_ec_modes ec)
void	ast_udptl_set_far_max_datagram (struct ast_udptl *udptl, unsigned int max_datagram)
void	ast_udptl_set_local_max_ifp (struct ast_udptl *udptl, unsigned int max_ifp)
void	ast_udptl_set_m_type (struct ast_udptl *udptl, unsigned int pt)
void	ast_udptl_set_peer (struct ast_udptl *udptl, const struct sockaddr_in *them)
void	ast_udptl_set_udptlmap_type (struct ast_udptl *udptl, unsigned int pt, char *mimeType, char *mimeSubtype)
void	ast_udptl_setnat (struct ast_udptl *udptl, int nat)
int	ast_udptl_setqos (struct ast_udptl *udptl, unsigned int tos, unsigned int cos)
void	ast_udptl_stop (struct ast_udptl *udptl)
int	ast_udptl_write (struct ast_udptl *udptl, struct ast_frame *f)

---

Detailed Description

UDPTL support for T.38.

Author:

Steve Underwood <steveu@coppice.org> udptl.c

Todo:

add doxygen documentation to this file!

Definition in file udptl.h.

---

Typedef Documentation

typedef int(* ast_udptl_callback)(struct ast_udptl *udptl, struct ast_frame *f, void *data)

Definition at line 57 of file udptl.h.

---

Enumeration Type Documentation

enum ast_t38_ec_modes

Enumerator:

UDPTL_ERROR_CORRECTION_NONE
UDPTL_ERROR_CORRECTION_FEC
UDPTL_ERROR_CORRECTION_REDUNDANCY

Definition at line 36 of file udptl.h.

                      {
    UDPTL_ERROR_CORRECTION_NONE,
    UDPTL_ERROR_CORRECTION_FEC,
    UDPTL_ERROR_CORRECTION_REDUNDANCY
};

---

Function Documentation

int ast_udptl_bridge	(	struct ast_channel *	c0,
		struct ast_channel *	c1,
		int	flags,
		struct ast_frame **	fo,
		struct ast_channel **	rc
	)

Definition at line 1061 of file udptl.c.

References ast_channel_lock, ast_channel_trylock, ast_channel_unlock, ast_check_hangup(), ast_debug, AST_FRAME_MODEM, ast_frfree, ast_inet_ntoa(), ast_log(), ast_read(), ast_udptl_get_peer(), ast_waitfor_n(), ast_write(), f, ast_frame::frametype, get_proto(), ast_udptl_protocol::get_udptl_info, inaddrcmp(), LOG_WARNING, ast_channel::masq, ast_channel::masqr, ast_channel::name, ast_udptl_protocol::set_udptl_peer, and ast_channel::tech_pvt.

{
   struct ast_frame *f;
   struct ast_channel *who;
   struct ast_channel *cs[3];
   struct ast_udptl *p0;
   struct ast_udptl *p1;
   struct ast_udptl_protocol *pr0;
   struct ast_udptl_protocol *pr1;
   struct sockaddr_in ac0;
   struct sockaddr_in ac1;
   struct sockaddr_in t0;
   struct sockaddr_in t1;
   void *pvt0;
   void *pvt1;
   int to;
   
   ast_channel_lock(c0);
   while (ast_channel_trylock(c1)) {
      ast_channel_unlock(c0);
      usleep(1);
      ast_channel_lock(c0);
   }
   pr0 = get_proto(c0);
   pr1 = get_proto(c1);
   if (!pr0) {
      ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c0->name);
      ast_channel_unlock(c0);
      ast_channel_unlock(c1);
      return -1;
   }
   if (!pr1) {
      ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c1->name);
      ast_channel_unlock(c0);
      ast_channel_unlock(c1);
      return -1;
   }
   pvt0 = c0->tech_pvt;
   pvt1 = c1->tech_pvt;
   p0 = pr0->get_udptl_info(c0);
   p1 = pr1->get_udptl_info(c1);
   if (!p0 || !p1) {
      /* Somebody doesn't want to play... */
      ast_channel_unlock(c0);
      ast_channel_unlock(c1);
      return -2;
   }
   if (pr0->set_udptl_peer(c0, p1)) {
      ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", c0->name, c1->name);
      memset(&ac1, 0, sizeof(ac1));
   } else {
      /* Store UDPTL peer */
      ast_udptl_get_peer(p1, &ac1);
   }
   if (pr1->set_udptl_peer(c1, p0)) {
      ast_log(LOG_WARNING, "Channel '%s' failed to talk back to '%s'\n", c1->name, c0->name);
      memset(&ac0, 0, sizeof(ac0));
   } else {
      /* Store UDPTL peer */
      ast_udptl_get_peer(p0, &ac0);
   }
   ast_channel_unlock(c0);
   ast_channel_unlock(c1);
   cs[0] = c0;
   cs[1] = c1;
   cs[2] = NULL;
   for (;;) {
      if ((c0->tech_pvt != pvt0) ||
         (c1->tech_pvt != pvt1) ||
         (c0->masq || c0->masqr || c1->masq || c1->masqr)) {
            ast_debug(1, "Oooh, something is weird, backing out\n");
            /* Tell it to try again later */
            return -3;
      }
      to = -1;
      ast_udptl_get_peer(p1, &t1);
      ast_udptl_get_peer(p0, &t0);
      if (inaddrcmp(&t1, &ac1)) {
         ast_debug(1, "Oooh, '%s' changed end address to %s:%d\n", 
            c1->name, ast_inet_ntoa(t1.sin_addr), ntohs(t1.sin_port));
         ast_debug(1, "Oooh, '%s' was %s:%d\n", 
            c1->name, ast_inet_ntoa(ac1.sin_addr), ntohs(ac1.sin_port));
         memcpy(&ac1, &t1, sizeof(ac1));
      }
      if (inaddrcmp(&t0, &ac0)) {
         ast_debug(1, "Oooh, '%s' changed end address to %s:%d\n", 
            c0->name, ast_inet_ntoa(t0.sin_addr), ntohs(t0.sin_port));
         ast_debug(1, "Oooh, '%s' was %s:%d\n", 
            c0->name, ast_inet_ntoa(ac0.sin_addr), ntohs(ac0.sin_port));
         memcpy(&ac0, &t0, sizeof(ac0));
      }
      who = ast_waitfor_n(cs, 2, &to);
      if (!who) {
         ast_debug(1, "Ooh, empty read...\n");
         /* check for hangup / whentohangup */
         if (ast_check_hangup(c0) || ast_check_hangup(c1))
            break;
         continue;
      }
      f = ast_read(who);
      if (!f) {
         *fo = f;
         *rc = who;
         ast_debug(1, "Oooh, got a %s\n", f ? "digit" : "hangup");
         /* That's all we needed */
         return 0;
      } else {
         if (f->frametype == AST_FRAME_MODEM) {
            /* Forward T.38 frames if they happen upon us */
            if (who == c0) {
               ast_write(c1, f);
            } else if (who == c1) {
               ast_write(c0, f);
            }
         }
         ast_frfree(f);
      }
      /* Swap priority. Not that it's a big deal at this point */
      cs[2] = cs[0];
      cs[0] = cs[1];
      cs[1] = cs[2];
   }
   return -1;
}

void ast_udptl_destroy

(

struct ast_udptl *

udptl

)

Definition at line 966 of file udptl.c.

References ast_free, ast_io_remove(), ast_udptl::fd, ast_udptl::io, and ast_udptl::ioid.

Referenced by __sip_destroy(), and create_addr_from_peer().

{
   if (udptl->ioid)
      ast_io_remove(udptl->io, udptl->ioid);
   if (udptl->fd > -1)
      close(udptl->fd);
   ast_free(udptl);
}

int ast_udptl_fd

(

const struct ast_udptl *

udptl

)

Definition at line 629 of file udptl.c.

References ast_udptl::fd.

Referenced by __oh323_new(), and sip_new().

{
   return udptl->fd;
}

enum ast_t38_ec_modes ast_udptl_get_error_correction_scheme

(

const struct ast_udptl *

udptl

)

Definition at line 772 of file udptl.c.

References ast_log(), ast_udptl::error_correction_scheme, and LOG_WARNING.

Referenced by add_sdp().

{
   if (udptl)
      return udptl->error_correction_scheme;
   else {
      ast_log(LOG_WARNING, "udptl structure is null\n");
      return -1;
   }
}

unsigned int ast_udptl_get_far_max_datagram

(

const struct ast_udptl *

udptl

)

Definition at line 822 of file udptl.c.

References ast_log(), ast_udptl::far_max_datagram, and LOG_WARNING.

{
   if (udptl)
      return udptl->far_max_datagram;
   else {
      ast_log(LOG_WARNING, "udptl structure is null\n");
      return 0;
   }
}

unsigned int ast_udptl_get_far_max_ifp

(

const struct ast_udptl *

udptl

)

Definition at line 848 of file udptl.c.

References ast_udptl::far_max_ifp.

Referenced by change_t38_state().

{
   return udptl->far_max_ifp;
}

unsigned int ast_udptl_get_local_max_datagram

(

const struct ast_udptl *

udptl

)

Definition at line 812 of file udptl.c.

References ast_log(), ast_udptl::local_max_datagram, and LOG_WARNING.

Referenced by add_sdp().

{
   if (udptl)
      return udptl->local_max_datagram;
   else {
      ast_log(LOG_WARNING, "udptl structure is null\n");
      return 0;
   }
}

void ast_udptl_get_peer	(	const struct ast_udptl *	udptl,
		struct sockaddr_in *	them
	)

Definition at line 947 of file udptl.c.

References ast_udptl::them.

Referenced by ast_udptl_bridge(), and sip_set_udptl_peer().

{
   memset(them, 0, sizeof(*them));
   them->sin_family = AF_INET;
   them->sin_port = udptl->them.sin_port;
   them->sin_addr = udptl->them.sin_addr;
}

void ast_udptl_get_us	(	const struct ast_udptl *	udptl,
		struct sockaddr_in *	us
	)

Definition at line 955 of file udptl.c.

References ast_udptl::us.

Referenced by add_sdp().

{
   memcpy(us, &udptl->us, sizeof(udptl->us));
}

void ast_udptl_init

(

void

)

Definition at line 1427 of file udptl.c.

References __ast_udptl_reload(), and ast_cli_register_multiple().

Referenced by main().

{
   ast_cli_register_multiple(cli_udptl, sizeof(cli_udptl) / sizeof(struct ast_cli_entry));
   __ast_udptl_reload(0);
}

struct ast_udptl* ast_udptl_new	(	struct sched_context *	sched,
		struct io_context *	io,
		int	callbackmode
	)			[read]

Definition at line 929 of file udptl.c.

References ast_udptl_new_with_bindaddr().

{
   struct in_addr ia;
   memset(&ia, 0, sizeof(ia));
   return ast_udptl_new_with_bindaddr(sched, io, callbackmode, ia);
}

struct ast_udptl* ast_udptl_new_with_bindaddr	(	struct sched_context *	sched,
		struct io_context *	io,
		int	callbackmode,
		struct in_addr	in
	)			[read]

Definition at line 853 of file udptl.c.

References ast_calloc, ast_free, ast_io_add(), AST_IO_IN, ast_log(), ast_random(), udptl_fec_tx_buffer_t::buf_len, udptl_fec_rx_buffer_t::buf_len, errno, ast_udptl::error_correction_entries, ast_udptl::error_correction_span, ast_udptl::far_max_datagram, ast_udptl::fd, ast_udptl::flags, ast_udptl::io, ast_udptl::ioid, ast_udptl::local_max_datagram, LOG_WARNING, ast_udptl::rx, ast_udptl::sched, ast_udptl::them, ast_udptl::tx, UDPTL_BUF_MASK, udptlread(), and ast_udptl::us.

Referenced by ast_udptl_new(), create_addr_from_peer(), handle_request_invite(), and sip_alloc().

{
   struct ast_udptl *udptl;
   int x;
   int startplace;
   int i;
   long int flags;

   if (!(udptl = ast_calloc(1, sizeof(*udptl))))
      return NULL;

   udptl->error_correction_span = udptlfecspan;
   udptl->error_correction_entries = udptlfecentries;
   
   udptl->far_max_datagram = udptlmaxdatagram;
   udptl->local_max_datagram = udptlmaxdatagram;

   for (i = 0; i <= UDPTL_BUF_MASK; i++) {
      udptl->rx[i].buf_len = -1;
      udptl->tx[i].buf_len = -1;
   }

   udptl->them.sin_family = AF_INET;
   udptl->us.sin_family = AF_INET;

   if ((udptl->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
      ast_free(udptl);
      ast_log(LOG_WARNING, "Unable to allocate socket: %s\n", strerror(errno));
      return NULL;
   }
   flags = fcntl(udptl->fd, F_GETFL);
   fcntl(udptl->fd, F_SETFL, flags | O_NONBLOCK);
#ifdef SO_NO_CHECK
   if (nochecksums)
      setsockopt(udptl->fd, SOL_SOCKET, SO_NO_CHECK, &nochecksums, sizeof(nochecksums));
#endif
   /* Find us a place */
   x = (udptlstart == udptlend) ? udptlstart : (ast_random() % (udptlend - udptlstart)) + udptlstart;
   if (use_even_ports && (x & 1)) {
      ++x;
   }
   startplace = x;
   for (;;) {
      udptl->us.sin_port = htons(x);
      udptl->us.sin_addr = addr;
      if (bind(udptl->fd, (struct sockaddr *) &udptl->us, sizeof(udptl->us)) == 0)
         break;
      if (errno != EADDRINUSE) {
         ast_log(LOG_WARNING, "Unexpected bind error: %s\n", strerror(errno));
         close(udptl->fd);
         ast_free(udptl);
         return NULL;
      }
      if (use_even_ports) {
         x += 2;
      } else {
         ++x;
      }
      if (x > udptlend)
         x = udptlstart;
      if (x == startplace) {
         ast_log(LOG_WARNING, "No UDPTL ports remaining\n");
         close(udptl->fd);
         ast_free(udptl);
         return NULL;
      }
   }
   if (io && sched && callbackmode) {
      /* Operate this one in a callback mode */
      udptl->sched = sched;
      udptl->io = io;
      udptl->ioid = ast_io_add(udptl->io, udptl->fd, udptlread, AST_IO_IN, udptl);
   }
   return udptl;
}

int ast_udptl_proto_register

(

struct ast_udptl_protocol *

proto

)

Definition at line 1030 of file udptl.c.

References ast_log(), AST_RWLIST_INSERT_TAIL, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_udptl_protocol::list, LOG_WARNING, and ast_udptl_protocol::type.

Referenced by load_module().

{
   struct ast_udptl_protocol *cur;

   AST_RWLIST_WRLOCK(&protos);
   AST_RWLIST_TRAVERSE(&protos, cur, list) {
      if (cur->type == proto->type) {
         ast_log(LOG_WARNING, "Tried to register same protocol '%s' twice\n", cur->type);
         AST_RWLIST_UNLOCK(&protos);
         return -1;
      }
   }
   AST_RWLIST_INSERT_TAIL(&protos, proto, list);
   AST_RWLIST_UNLOCK(&protos);
   return 0;
}

void ast_udptl_proto_unregister

(

struct ast_udptl_protocol *

proto

)

Definition at line 1023 of file udptl.c.

References AST_RWLIST_REMOVE, AST_RWLIST_UNLOCK, and AST_RWLIST_WRLOCK.

Referenced by unload_module().

{
   AST_RWLIST_WRLOCK(&protos);
   AST_RWLIST_REMOVE(&protos, proto, list);
   AST_RWLIST_UNLOCK(&protos);
}

struct ast_frame* ast_udptl_read

(

struct ast_udptl *

udptl

)

[read]

Definition at line 661 of file udptl.c.

References ast_assert, ast_debug, AST_FRIENDLY_OFFSET, ast_inet_ntoa(), ast_log(), ast_null_frame, ast_verb, errno, ast_udptl::f, ast_udptl::fd, len(), LOG_WARNING, ast_udptl::nat, ast_udptl::rawdata, ast_udptl::them, udptl_debug_test_addr(), and udptl_rx_packet().

Referenced by sip_rtp_read(), skinny_rtp_read(), and udptlread().

{
   int res;
   struct sockaddr_in sin;
   socklen_t len;
   uint16_t seqno = 0;
   uint16_t *udptlheader;

   len = sizeof(sin);
   
   /* Cache where the header will go */
   res = recvfrom(udptl->fd,
         udptl->rawdata + AST_FRIENDLY_OFFSET,
         sizeof(udptl->rawdata) - AST_FRIENDLY_OFFSET,
         0,
         (struct sockaddr *) &sin,
         &len);
   udptlheader = (uint16_t *)(udptl->rawdata + AST_FRIENDLY_OFFSET);
   if (res < 0) {
      if (errno != EAGAIN)
         ast_log(LOG_WARNING, "UDPTL read error: %s\n", strerror(errno));
      ast_assert(errno != EBADF);
      return &ast_null_frame;
   }

   /* Ignore if the other side hasn't been given an address yet. */
   if (!udptl->them.sin_addr.s_addr || !udptl->them.sin_port)
      return &ast_null_frame;

   if (udptl->nat) {
      /* Send to whoever sent to us */
      if ((udptl->them.sin_addr.s_addr != sin.sin_addr.s_addr) ||
         (udptl->them.sin_port != sin.sin_port)) {
         memcpy(&udptl->them, &sin, sizeof(udptl->them));
         ast_debug(1, "UDPTL NAT: Using address %s:%d\n", ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
      }
   }

   if (udptl_debug_test_addr(&sin)) {
      ast_verb(1, "Got UDPTL packet from %s:%d (type %d, seq %d, len %d)\n",
            ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), 0, seqno, res);
   }
#if 0
   printf("Got UDPTL packet from %s:%d (seq %d, len = %d)\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), seqno, res);
#endif
   if (udptl_rx_packet(udptl, udptl->rawdata + AST_FRIENDLY_OFFSET, res) < 1)
      return &ast_null_frame;

   return &udptl->f[0];
}

int ast_udptl_reload

(

void

)

Version:

1.6.1 return changed to int

Definition at line 1421 of file udptl.c.

References __ast_udptl_reload().

{
   __ast_udptl_reload(1);
   return 0;
}

void ast_udptl_reset

(

struct ast_udptl *

udptl

)

void ast_udptl_set_callback	(	struct ast_udptl *	udptl,
		ast_udptl_callback	callback
	)

Definition at line 639 of file udptl.c.

References ast_udptl::callback.

{
   udptl->callback = callback;
}

void ast_udptl_set_data	(	struct ast_udptl *	udptl,
		void *	data
	)

Definition at line 634 of file udptl.c.

References ast_udptl::data.

{
   udptl->data = data;
}

void ast_udptl_set_error_correction_scheme	(	struct ast_udptl *	udptl,
		enum ast_t38_ec_modes	ec
	)

Definition at line 782 of file udptl.c.

References ast_log(), calculate_far_max_ifp(), calculate_local_max_datagram(), ast_udptl::error_correction_entries, ast_udptl::error_correction_scheme, ast_udptl::error_correction_span, LOG_WARNING, UDPTL_ERROR_CORRECTION_FEC, and UDPTL_ERROR_CORRECTION_REDUNDANCY.

Referenced by process_sdp(), and set_t38_capabilities().

{
   if (udptl) {
      udptl->error_correction_scheme = ec;
      switch (ec) {
      case UDPTL_ERROR_CORRECTION_FEC:
         udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
         if (udptl->error_correction_entries == 0) {
            udptl->error_correction_entries = 3;
         }
         if (udptl->error_correction_span == 0) {
            udptl->error_correction_span = 3;
         }
         break;
      case UDPTL_ERROR_CORRECTION_REDUNDANCY:
         udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
         if (udptl->error_correction_entries == 0) {
            udptl->error_correction_entries = 3;
         }
         break;
      default:
         /* nothing to do */
         break;
      };
      calculate_local_max_datagram(udptl);
      calculate_far_max_ifp(udptl);
   } else
      ast_log(LOG_WARNING, "udptl structure is null\n");
}

void ast_udptl_set_far_max_datagram	(	struct ast_udptl *	udptl,
		unsigned int	max_datagram
	)

Definition at line 832 of file udptl.c.

References ast_log(), calculate_far_max_ifp(), ast_udptl::far_max_datagram, and LOG_WARNING.

Referenced by process_sdp().

{
   if (udptl) {
      udptl->far_max_datagram = max_datagram;
      calculate_far_max_ifp(udptl);
   } else {
      ast_log(LOG_WARNING, "udptl structure is null\n");
   }
}

void ast_udptl_set_local_max_ifp	(	struct ast_udptl *	udptl,
		unsigned int	max_ifp
	)

Definition at line 842 of file udptl.c.

References calculate_local_max_datagram(), and ast_udptl::local_max_ifp.

Referenced by interpret_t38_parameters().

{
   udptl->local_max_ifp = max_ifp;
   calculate_local_max_datagram(udptl);
}

void ast_udptl_set_m_type	(	struct ast_udptl *	udptl,
		unsigned int	pt
	)

void ast_udptl_set_peer	(	struct ast_udptl *	udptl,
		const struct sockaddr_in *	them
	)

Definition at line 941 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp().

{
   udptl->them.sin_port = them->sin_port;
   udptl->them.sin_addr = them->sin_addr;
}

void ast_udptl_set_udptlmap_type	(	struct ast_udptl *	udptl,
		unsigned int	pt,
		char *	mimeType,
		char *	mimeSubtype
	)

void ast_udptl_setnat	(	struct ast_udptl *	udptl,
		int	nat
	)

Definition at line 644 of file udptl.c.

References ast_udptl::nat.

Referenced by do_setnat().

{
   udptl->nat = nat;
}

int ast_udptl_setqos	(	struct ast_udptl *	udptl,
		unsigned int	tos,
		unsigned int	cos
	)

Definition at line 936 of file udptl.c.

References ast_netsock_set_qos(), and ast_udptl::fd.

Referenced by sip_alloc().

{
   return ast_netsock_set_qos(udptl->fd, tos, cos, "UDPTL");
}

void ast_udptl_stop

(

struct ast_udptl *

udptl

)

Definition at line 960 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp(), and stop_media_flows().

{
   memset(&udptl->them.sin_addr, 0, sizeof(udptl->them.sin_addr));
   memset(&udptl->them.sin_port, 0, sizeof(udptl->them.sin_port));
}

int ast_udptl_write	(	struct ast_udptl *	udptl,
		struct ast_frame *	f
	)

Definition at line 975 of file udptl.c.

References AST_FRAME_MODEM, ast_inet_ntoa(), ast_log(), AST_MODEM_T38, ast_verb, buf, ast_frame::data, ast_frame::datalen, errno, ast_udptl::far_max_datagram, ast_udptl::far_max_ifp, ast_udptl::fd, ast_frame::frametype, len(), LOG_NOTICE, LOG_WARNING, ast_frame::ptr, seq, ast_frame::subclass, ast_udptl::them, ast_udptl::tx_seq_no, udptl_build_packet(), and udptl_debug_test_addr().

Referenced by sip_write().

{
   unsigned int seq;
   unsigned int len;
   int res;
   uint8_t buf[s->far_max_datagram];

   /* If we have no peer, return immediately */ 
   if (s->them.sin_addr.s_addr == INADDR_ANY)
      return 0;

   /* If there is no data length, return immediately */
   if (f->datalen == 0)
      return 0;
   
   if ((f->frametype != AST_FRAME_MODEM) ||
       (f->subclass != AST_MODEM_T38)) {
      ast_log(LOG_WARNING, "UDPTL can only send T.38 data.\n");
      return -1;
   }

   if (f->datalen > s->far_max_ifp) {
      ast_log(LOG_WARNING,
         "UDPTL asked to send %d bytes of IFP when far end only prepared to accept %d bytes; data loss may occur. "
         "You may need to override the T38FaxMaxDatagram value for this endpoint in the channel driver configuration.\n", f->datalen, s->far_max_ifp);
   }

   /* Save seq_no for debug output because udptl_build_packet increments it */
   seq = s->tx_seq_no & 0xFFFF;

   /* Cook up the UDPTL packet, with the relevant EC info. */
   len = udptl_build_packet(s, buf, sizeof(buf), f->data.ptr, f->datalen);

   if (len > 0 && s->them.sin_port && s->them.sin_addr.s_addr) {
      if ((res = sendto(s->fd, buf, len, 0, (struct sockaddr *) &s->them, sizeof(s->them))) < 0)
         ast_log(LOG_NOTICE, "UDPTL Transmission error to %s:%d: %s\n", ast_inet_ntoa(s->them.sin_addr), ntohs(s->them.sin_port), strerror(errno));
#if 0
      printf("Sent %d bytes of UDPTL data to %s:%d\n", res, ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
#endif
      if (udptl_debug_test_addr(&s->them))
         ast_verb(1, "Sent UDPTL packet to %s:%d (type %d, seq %d, len %d)\n",
               ast_inet_ntoa(s->them.sin_addr),
               ntohs(s->them.sin_port), 0, seq, len);
   }
      
   return 0;
}