Sat Aug 6 00:40:06 2011

Asterisk developer's documentation


udptl.h File Reference

#include "asterisk/frame.h"
#include "asterisk/io.h"
#include "asterisk/sched.h"
#include "asterisk/channel.h"
#include <netinet/in.h>

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  { 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 (struct ast_udptl *udptl)
void ast_udptl_get_current_formats (struct ast_udptl *udptl, int *astFormats, int *nonAstFormats)
int ast_udptl_get_error_correction_scheme (struct ast_udptl *udptl)
int ast_udptl_get_far_max_datagram (struct ast_udptl *udptl)
int ast_udptl_get_local_max_datagram (struct ast_udptl *udptl)
void ast_udptl_get_peer (struct ast_udptl *udptl, struct sockaddr_in *them)
void ast_udptl_get_us (struct ast_udptl *udptl, struct sockaddr_in *us)
void ast_udptl_init (void)
int ast_udptl_lookup_code (struct ast_udptl *udptl, int isAstFormat, int code)
ast_udptlast_udptl_new (struct sched_context *sched, struct io_context *io, int callbackmode)
ast_udptlast_udptl_new_with_bindaddr (struct sched_context *sched, struct io_context *io, int callbackmode, struct in_addr in)
void ast_udptl_offered_from_local (struct ast_udptl *udptl, int local)
int ast_udptl_proto_register (struct ast_udptl_protocol *proto)
void ast_udptl_proto_unregister (struct ast_udptl_protocol *proto)
ast_frameast_udptl_read (struct ast_udptl *udptl)
void 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, int ec)
void ast_udptl_set_far_max_datagram (struct ast_udptl *udptl, int max_datagram)
void ast_udptl_set_local_max_datagram (struct ast_udptl *udptl, int max_datagram)
void ast_udptl_set_m_type (struct ast_udptl *udptl, int pt)
void ast_udptl_set_peer (struct ast_udptl *udptl, struct sockaddr_in *them)
void ast_udptl_set_udptlmap_type (struct ast_udptl *udptl, int pt, char *mimeType, char *mimeSubtype)
void ast_udptl_setnat (struct ast_udptl *udptl, int nat)
int ast_udptl_settos (struct ast_udptl *udptl, int tos)
void ast_udptl_stop (struct ast_udptl *udptl)
int ast_udptl_write (struct ast_udptl *udptl, struct ast_frame *f)


Typedef Documentation

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

Definition at line 50 of file udptl.h.


Enumeration Type Documentation

anonymous enum

Enumerator:
UDPTL_ERROR_CORRECTION_NONE 
UDPTL_ERROR_CORRECTION_FEC 
UDPTL_ERROR_CORRECTION_REDUNDANCY 

Definition at line 28 of file udptl.h.


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 970 of file udptl.c.

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

00971 {
00972    struct ast_frame *f;
00973    struct ast_channel *who;
00974    struct ast_channel *cs[3];
00975    struct ast_udptl *p0;
00976    struct ast_udptl *p1;
00977    struct ast_udptl_protocol *pr0;
00978    struct ast_udptl_protocol *pr1;
00979    struct sockaddr_in ac0;
00980    struct sockaddr_in ac1;
00981    struct sockaddr_in t0;
00982    struct sockaddr_in t1;
00983    void *pvt0;
00984    void *pvt1;
00985    int to;
00986    
00987    ast_channel_lock(c0);
00988    while (ast_channel_trylock(c1)) {
00989       ast_channel_unlock(c0);
00990       usleep(1);
00991       ast_channel_lock(c0);
00992    }
00993    pr0 = get_proto(c0);
00994    pr1 = get_proto(c1);
00995    if (!pr0) {
00996       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c0->name);
00997       ast_channel_unlock(c0);
00998       ast_channel_unlock(c1);
00999       return -1;
01000    }
01001    if (!pr1) {
01002       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c1->name);
01003       ast_channel_unlock(c0);
01004       ast_channel_unlock(c1);
01005       return -1;
01006    }
01007    pvt0 = c0->tech_pvt;
01008    pvt1 = c1->tech_pvt;
01009    p0 = pr0->get_udptl_info(c0);
01010    p1 = pr1->get_udptl_info(c1);
01011    if (!p0 || !p1) {
01012       /* Somebody doesn't want to play... */
01013       ast_channel_unlock(c0);
01014       ast_channel_unlock(c1);
01015       return -2;
01016    }
01017    if (pr0->set_udptl_peer(c0, p1)) {
01018       ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", c0->name, c1->name);
01019       memset(&ac1, 0, sizeof(ac1));
01020    } else {
01021       /* Store UDPTL peer */
01022       ast_udptl_get_peer(p1, &ac1);
01023    }
01024    if (pr1->set_udptl_peer(c1, p0)) {
01025       ast_log(LOG_WARNING, "Channel '%s' failed to talk back to '%s'\n", c1->name, c0->name);
01026       memset(&ac0, 0, sizeof(ac0));
01027    } else {
01028       /* Store UDPTL peer */
01029       ast_udptl_get_peer(p0, &ac0);
01030    }
01031    ast_channel_unlock(c0);
01032    ast_channel_unlock(c1);
01033    cs[0] = c0;
01034    cs[1] = c1;
01035    cs[2] = NULL;
01036    for (;;) {
01037       if ((c0->tech_pvt != pvt0) ||
01038          (c1->tech_pvt != pvt1) ||
01039          (c0->masq || c0->masqr || c1->masq || c1->masqr)) {
01040             ast_log(LOG_DEBUG, "Oooh, something is weird, backing out\n");
01041             /* Tell it to try again later */
01042             return -3;
01043       }
01044       to = -1;
01045       ast_udptl_get_peer(p1, &t1);
01046       ast_udptl_get_peer(p0, &t0);
01047       if (inaddrcmp(&t1, &ac1)) {
01048          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01049             c1->name, ast_inet_ntoa(t1.sin_addr), ntohs(t1.sin_port));
01050          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01051             c1->name, ast_inet_ntoa(ac1.sin_addr), ntohs(ac1.sin_port));
01052          memcpy(&ac1, &t1, sizeof(ac1));
01053       }
01054       if (inaddrcmp(&t0, &ac0)) {
01055          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01056             c0->name, ast_inet_ntoa(t0.sin_addr), ntohs(t0.sin_port));
01057          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01058             c0->name, ast_inet_ntoa(ac0.sin_addr), ntohs(ac0.sin_port));
01059          memcpy(&ac0, &t0, sizeof(ac0));
01060       }
01061       who = ast_waitfor_n(cs, 2, &to);
01062       if (!who) {
01063          ast_log(LOG_DEBUG, "Ooh, empty read...\n");
01064          /* check for hangup / whentohangup */
01065          if (ast_check_hangup(c0) || ast_check_hangup(c1))
01066             break;
01067          continue;
01068       }
01069       f = ast_read(who);
01070       if (!f) {
01071          *fo = f;
01072          *rc = who;
01073          ast_log(LOG_DEBUG, "Oooh, got a %s\n", f ? "digit" : "hangup");
01074          /* That's all we needed */
01075          return 0;
01076       } else {
01077          if (f->frametype == AST_FRAME_MODEM) {
01078             /* Forward T.38 frames if they happen upon us */
01079             if (who == c0) {
01080                ast_write(c1, f);
01081             } else if (who == c1) {
01082                ast_write(c0, f);
01083             }
01084          }
01085          ast_frfree(f);
01086       }
01087       /* Swap priority. Not that it's a big deal at this point */
01088       cs[2] = cs[0];
01089       cs[0] = cs[1];
01090       cs[1] = cs[2];
01091    }
01092    return -1;
01093 }

void ast_udptl_destroy ( struct ast_udptl udptl  ) 

Definition at line 870 of file udptl.c.

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

Referenced by __sip_destroy(), create_addr_from_peer(), and sip_alloc().

00871 {
00872    if (udptl->ioid)
00873       ast_io_remove(udptl->io, udptl->ioid);
00874    if (udptl->fd > -1)
00875       close(udptl->fd);
00876    free(udptl);
00877 }

int ast_udptl_fd ( struct ast_udptl udptl  ) 

Definition at line 588 of file udptl.c.

References ast_udptl::fd.

Referenced by __oh323_new(), and sip_new().

00589 {
00590    return udptl->fd;
00591 }

void ast_udptl_get_current_formats ( struct ast_udptl udptl,
int *  astFormats,
int *  nonAstFormats 
)

int ast_udptl_get_error_correction_scheme ( struct ast_udptl udptl  ) 

Definition at line 679 of file udptl.c.

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

Referenced by create_addr_from_peer(), sip_alloc(), and sip_handle_t38_reinvite().

00680 {
00681    if (udptl)
00682       return udptl->error_correction_scheme;
00683    else {
00684       ast_log(LOG_WARNING, "udptl structure is null\n");
00685       return -1;
00686    }
00687 }

int ast_udptl_get_far_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 719 of file udptl.c.

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

00720 {
00721    if (udptl)
00722       return udptl->far_max_datagram_size;
00723    else {
00724       ast_log(LOG_WARNING, "udptl structure is null\n");
00725       return -1;
00726    }
00727 }

int ast_udptl_get_local_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 709 of file udptl.c.

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

Referenced by add_sdp(), and sip_handle_t38_reinvite().

00710 {
00711    if (udptl)
00712       return udptl->local_max_datagram_size;
00713    else {
00714       ast_log(LOG_WARNING, "udptl structure is null\n");
00715       return -1;
00716    }
00717 }

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

Definition at line 851 of file udptl.c.

References ast_udptl::them.

Referenced by ast_udptl_bridge(), sip_handle_t38_reinvite(), and sip_set_udptl_peer().

00852 {
00853    memset(them, 0, sizeof(*them));
00854    them->sin_family = AF_INET;
00855    them->sin_port = udptl->them.sin_port;
00856    them->sin_addr = udptl->them.sin_addr;
00857 }

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

Definition at line 859 of file udptl.c.

References ast_udptl::us.

Referenced by add_sdp().

00860 {
00861    memcpy(us, &udptl->us, sizeof(udptl->us));
00862 }

void ast_udptl_init ( void   ) 

Definition at line 1284 of file udptl.c.

References ast_cli_register_multiple(), ast_udptl_reload(), and cli_udptl.

Referenced by main().

01285 {
01286    ast_cli_register_multiple(cli_udptl, sizeof(cli_udptl) / sizeof(struct ast_cli_entry));
01287    ast_udptl_reload();
01288 }

int ast_udptl_lookup_code ( struct ast_udptl udptl,
int  isAstFormat,
int  code 
)

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

Definition at line 829 of file udptl.c.

References ast_udptl_new_with_bindaddr(), io, and sched.

00830 {
00831    struct in_addr ia;
00832    memset(&ia, 0, sizeof(ia));
00833    return ast_udptl_new_with_bindaddr(sched, io, callbackmode, ia);
00834 }

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

Definition at line 745 of file udptl.c.

References ast_calloc, ast_io_add(), AST_IO_IN, ast_log(), ast_random(), errno, ast_udptl::flags, free, io, LOG_WARNING, sched, UDPTL_ERROR_CORRECTION_FEC, UDPTL_ERROR_CORRECTION_NONE, UDPTL_ERROR_CORRECTION_REDUNDANCY, and udptlread().

Referenced by ast_udptl_new(), and sip_alloc().

00746 {
00747    struct ast_udptl *udptl;
00748    int x;
00749    int startplace;
00750    int i;
00751    long int flags;
00752 
00753    if (!(udptl = ast_calloc(1, sizeof(*udptl))))
00754       return NULL;
00755 
00756    if (udptlfectype == 2)
00757       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00758    else if (udptlfectype == 1)
00759       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00760    else
00761       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00762    udptl->error_correction_span = udptlfecspan;
00763    udptl->error_correction_entries = udptlfecentries;
00764    
00765    udptl->far_max_datagram_size = udptlmaxdatagram;
00766    udptl->local_max_datagram_size = udptlmaxdatagram;
00767 
00768    memset(&udptl->rx, 0, sizeof(udptl->rx));
00769    memset(&udptl->tx, 0, sizeof(udptl->tx));
00770    for (i = 0; i <= UDPTL_BUF_MASK; i++) {
00771       udptl->rx[i].buf_len = -1;
00772       udptl->tx[i].buf_len = -1;
00773    }
00774 
00775    udptl->them.sin_family = AF_INET;
00776    udptl->us.sin_family = AF_INET;
00777 
00778    if ((udptl->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
00779       free(udptl);
00780       ast_log(LOG_WARNING, "Unable to allocate socket: %s\n", strerror(errno));
00781       return NULL;
00782    }
00783    flags = fcntl(udptl->fd, F_GETFL);
00784    fcntl(udptl->fd, F_SETFL, flags | O_NONBLOCK);
00785 #ifdef SO_NO_CHECK
00786    if (nochecksums)
00787       setsockopt(udptl->fd, SOL_SOCKET, SO_NO_CHECK, &nochecksums, sizeof(nochecksums));
00788 #endif
00789    /* Find us a place */
00790    x = (ast_random() % (udptlend - udptlstart)) + udptlstart;
00791    if (use_even_ports && (x & 1)) {
00792       ++x;
00793    }
00794    startplace = x;
00795    for (;;) {
00796       udptl->us.sin_port = htons(x);
00797       udptl->us.sin_addr = addr;
00798       if (bind(udptl->fd, (struct sockaddr *) &udptl->us, sizeof(udptl->us)) == 0)
00799          break;
00800       if (errno != EADDRINUSE) {
00801          ast_log(LOG_WARNING, "Unexpected bind error: %s\n", strerror(errno));
00802          close(udptl->fd);
00803          free(udptl);
00804          return NULL;
00805       }
00806       if (use_even_ports) {
00807          x += 2;
00808       } else {
00809          ++x;
00810       }
00811       if (x > udptlend)
00812          x = udptlstart;
00813       if (x == startplace) {
00814          ast_log(LOG_WARNING, "No UDPTL ports remaining\n");
00815          close(udptl->fd);
00816          free(udptl);
00817          return NULL;
00818       }
00819    }
00820    if (io && sched && callbackmode) {
00821       /* Operate this one in a callback mode */
00822       udptl->sched = sched;
00823       udptl->io = io;
00824       udptl->ioid = ast_io_add(udptl->io, udptl->fd, udptlread, AST_IO_IN, udptl);
00825    }
00826    return udptl;
00827 }

void ast_udptl_offered_from_local ( struct ast_udptl udptl,
int  local 
)

Definition at line 671 of file udptl.c.

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

Referenced by transmit_invite().

00672 {
00673    if (udptl)
00674       udptl->udptl_offered_from_local = local;
00675    else
00676       ast_log(LOG_WARNING, "udptl structure is null\n");
00677 }

int ast_udptl_proto_register ( struct ast_udptl_protocol proto  ) 

Definition at line 940 of file udptl.c.

References ast_log(), LOG_WARNING, ast_udptl_protocol::next, protos, and ast_udptl_protocol::type.

Referenced by load_module().

00941 {
00942    struct ast_udptl_protocol *cur;
00943 
00944    cur = protos;
00945    while (cur) {
00946       if (cur->type == proto->type) {
00947          ast_log(LOG_WARNING, "Tried to register same protocol '%s' twice\n", cur->type);
00948          return -1;
00949       }
00950       cur = cur->next;
00951    }
00952    proto->next = protos;
00953    protos = proto;
00954    return 0;
00955 }

void ast_udptl_proto_unregister ( struct ast_udptl_protocol proto  ) 

Definition at line 920 of file udptl.c.

References ast_udptl_protocol::next, and protos.

Referenced by unload_module().

00921 {
00922    struct ast_udptl_protocol *cur;
00923    struct ast_udptl_protocol *prev;
00924 
00925    cur = protos;
00926    prev = NULL;
00927    while (cur) {
00928       if (cur == proto) {
00929          if (prev)
00930             prev->next = proto->next;
00931          else
00932             protos = proto->next;
00933          return;
00934       }
00935       prev = cur;
00936       cur = cur->next;
00937    }
00938 }

struct ast_frame* ast_udptl_read ( struct ast_udptl udptl  ) 

Definition at line 620 of file udptl.c.

References ast_assert, AST_FRIENDLY_OFFSET, ast_inet_ntoa(), ast_log(), ast_null_frame, ast_verbose(), errno, ast_udptl::f, ast_udptl::fd, len(), LOG_DEBUG, 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().

00621 {
00622    int res;
00623    struct sockaddr_in sin;
00624    socklen_t len;
00625    uint16_t seqno = 0;
00626    uint16_t *udptlheader;
00627 
00628    len = sizeof(sin);
00629    
00630    /* Cache where the header will go */
00631    res = recvfrom(udptl->fd,
00632          udptl->rawdata + AST_FRIENDLY_OFFSET,
00633          sizeof(udptl->rawdata) - AST_FRIENDLY_OFFSET,
00634          0,
00635          (struct sockaddr *) &sin,
00636          &len);
00637    udptlheader = (uint16_t *)(udptl->rawdata + AST_FRIENDLY_OFFSET);
00638    if (res < 0) {
00639       if (errno != EAGAIN)
00640          ast_log(LOG_WARNING, "UDPTL read error: %s\n", strerror(errno));
00641       ast_assert(errno != EBADF);
00642       return &ast_null_frame;
00643    }
00644 
00645    /* Ignore if the other side hasn't been given an address yet. */
00646    if (!udptl->them.sin_addr.s_addr || !udptl->them.sin_port)
00647       return &ast_null_frame;
00648 
00649    if (udptl->nat) {
00650       /* Send to whoever sent to us */
00651       if ((udptl->them.sin_addr.s_addr != sin.sin_addr.s_addr) ||
00652          (udptl->them.sin_port != sin.sin_port)) {
00653          memcpy(&udptl->them, &sin, sizeof(udptl->them));
00654          ast_log(LOG_DEBUG, "UDPTL NAT: Using address %s:%d\n", ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00655       }
00656    }
00657 
00658    if (udptl_debug_test_addr(&sin)) {
00659       ast_verbose("Got UDPTL packet from %s:%d (type %d, seq %d, len %d)\n",
00660          ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), 0, seqno, res);
00661    }
00662 #if 0
00663    printf("Got UDPTL packet from %s:%d (seq %d, len = %d)\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), seqno, res);
00664 #endif
00665    if (udptl_rx_packet(udptl, udptl->rawdata + AST_FRIENDLY_OFFSET, res) < 1)
00666       return &ast_null_frame;
00667 
00668    return &udptl->f[0];
00669 }

void ast_udptl_reload ( void   ) 

Definition at line 1176 of file udptl.c.

References ast_config_destroy(), ast_config_load(), ast_false(), ast_log(), ast_true(), ast_variable_retrieve(), ast_verbose(), LOCAL_FAX_MAX_DATAGRAM, LOG_NOTICE, LOG_WARNING, MAX_FEC_ENTRIES, MAX_FEC_SPAN, option_verbose, s, and VERBOSE_PREFIX_2.

Referenced by ast_udptl_init().

01177 {
01178    struct ast_config *cfg;
01179    const char *s;
01180 
01181    udptlstart = 4500;
01182    udptlend = 4999;
01183    udptlfectype = 0;
01184    udptlfecentries = 0;
01185    udptlfecspan = 0;
01186    udptlmaxdatagram = 0;
01187    use_even_ports = 0;
01188 
01189    if ((cfg = ast_config_load("udptl.conf"))) {
01190       if ((s = ast_variable_retrieve(cfg, "general", "udptlstart"))) {
01191          udptlstart = atoi(s);
01192          if (udptlstart < 1024) {
01193             ast_log(LOG_WARNING, "Ports under 1024 are not allowed for T.38.\n");
01194             udptlstart = 1024;
01195          }
01196          if (udptlstart > 65535) {
01197             ast_log(LOG_WARNING, "Ports over 65535 are invalid.\n");
01198             udptlstart = 65535;
01199          }
01200       }
01201       if ((s = ast_variable_retrieve(cfg, "general", "udptlend"))) {
01202          udptlend = atoi(s);
01203          if (udptlend < 1024) {
01204             ast_log(LOG_WARNING, "Ports under 1024 are not allowed for T.38.\n");
01205             udptlend = 1024;
01206          }
01207          if (udptlend > 65535) {
01208             ast_log(LOG_WARNING, "Ports over 65535 are invalid.\n");
01209             udptlend = 65535;
01210          }
01211       }
01212       if ((s = ast_variable_retrieve(cfg, "general", "udptlchecksums"))) {
01213 #ifdef SO_NO_CHECK
01214          if (ast_false(s))
01215             nochecksums = 1;
01216          else
01217             nochecksums = 0;
01218 #else
01219          if (ast_false(s))
01220             ast_log(LOG_WARNING, "Disabling UDPTL checksums is not supported on this operating system!\n");
01221 #endif
01222       }
01223       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxUdpEC"))) {
01224          if (strcmp(s, "t38UDPFEC") == 0)
01225             udptlfectype = 2;
01226          else if (strcmp(s, "t38UDPRedundancy") == 0)
01227             udptlfectype = 1;
01228       }
01229       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxMaxDatagram"))) {
01230          udptlmaxdatagram = atoi(s);
01231          if (udptlmaxdatagram < 100) {
01232             ast_log(LOG_WARNING, "Too small T38FaxMaxDatagram size.  Defaulting to 100.\n");
01233             udptlmaxdatagram = 100;
01234          }
01235          if (udptlmaxdatagram > LOCAL_FAX_MAX_DATAGRAM) {
01236             ast_log(LOG_WARNING, "Too large T38FaxMaxDatagram size.  Defaulting to %d.\n", LOCAL_FAX_MAX_DATAGRAM);
01237             udptlmaxdatagram = LOCAL_FAX_MAX_DATAGRAM;
01238          }
01239       }
01240       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECentries"))) {
01241          udptlfecentries = atoi(s);
01242          if (udptlfecentries < 1) {
01243             ast_log(LOG_WARNING, "Too small UDPTLFECentries value.  Defaulting to 1.\n");
01244             udptlfecentries = 1;
01245          }
01246          if (udptlfecentries > MAX_FEC_ENTRIES) {
01247             ast_log(LOG_WARNING, "Too large UDPTLFECentries value.  Defaulting to %d.\n", MAX_FEC_ENTRIES);
01248             udptlfecentries = MAX_FEC_ENTRIES;
01249          }
01250       }
01251       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECspan"))) {
01252          udptlfecspan = atoi(s);
01253          if (udptlfecspan < 1) {
01254             ast_log(LOG_WARNING, "Too small UDPTLFECspan value.  Defaulting to 1.\n");
01255             udptlfecspan = 1;
01256          }
01257          if (udptlfecspan > MAX_FEC_SPAN) {
01258             ast_log(LOG_WARNING, "Too large UDPTLFECspan value.  Defaulting to %d.\n", MAX_FEC_SPAN);
01259             udptlfecspan = MAX_FEC_SPAN;
01260          }
01261       }
01262       if ((s = ast_variable_retrieve(cfg, "general", "use_even_ports"))) {
01263          use_even_ports = ast_true(s);
01264       }
01265       ast_config_destroy(cfg);
01266    }
01267    if (udptlstart >= udptlend) {
01268       ast_log(LOG_WARNING, "Unreasonable values for UDPTL start/end\n");
01269       udptlstart = 4500;
01270       udptlend = 4999;
01271    }
01272    if (use_even_ports && (udptlstart & 1)) {
01273       ++udptlstart;
01274       ast_log(LOG_NOTICE, "Odd numbered udptlstart specified but use_even_ports enabled. udptlstart is now %d\n", udptlstart);
01275    }
01276    if (use_even_ports && (udptlend & 1)) {
01277       --udptlend;
01278       ast_log(LOG_NOTICE, "Odd numbered udptlend specified but use_event_ports enabled. udptlend is now %d\n", udptlend);
01279    }
01280    if (option_verbose > 1)
01281       ast_verbose(VERBOSE_PREFIX_2 "UDPTL allocating from port range %d -> %d\n", udptlstart, udptlend);
01282 }

void ast_udptl_reset ( struct ast_udptl udptl  ) 

void ast_udptl_set_callback ( struct ast_udptl udptl,
ast_udptl_callback  callback 
)

Definition at line 598 of file udptl.c.

References ast_udptl::callback.

00599 {
00600    udptl->callback = callback;
00601 }

void ast_udptl_set_data ( struct ast_udptl udptl,
void *  data 
)

Definition at line 593 of file udptl.c.

References ast_udptl::data.

00594 {
00595    udptl->data = data;
00596 }

void ast_udptl_set_error_correction_scheme ( struct ast_udptl udptl,
int  ec 
)

Definition at line 689 of file udptl.c.

References ast_log(), ast_udptl::error_correction_scheme, LOG_WARNING, UDPTL_ERROR_CORRECTION_FEC, UDPTL_ERROR_CORRECTION_NONE, and UDPTL_ERROR_CORRECTION_REDUNDANCY.

Referenced by process_sdp(), process_sdp_a_image(), and sip_handle_t38_reinvite().

00690 {
00691    if (udptl) {
00692       switch (ec) {
00693       case UDPTL_ERROR_CORRECTION_FEC:
00694          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00695          break;
00696       case UDPTL_ERROR_CORRECTION_REDUNDANCY:
00697          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00698          break;
00699       case UDPTL_ERROR_CORRECTION_NONE:
00700          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00701          break;
00702       default:
00703          ast_log(LOG_WARNING, "error correction parameter invalid\n");
00704       };
00705    } else
00706       ast_log(LOG_WARNING, "udptl structure is null\n");
00707 }

void ast_udptl_set_far_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 737 of file udptl.c.

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

Referenced by process_sdp_a_image(), and sip_handle_t38_reinvite().

00738 {
00739    if (udptl)
00740       udptl->far_max_datagram_size = max_datagram;
00741    else
00742       ast_log(LOG_WARNING, "udptl structure is null\n");
00743 }

void ast_udptl_set_local_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 729 of file udptl.c.

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

Referenced by process_sdp_a_image(), and sip_handle_t38_reinvite().

00730 {
00731    if (udptl)
00732       udptl->local_max_datagram_size = max_datagram;
00733    else
00734       ast_log(LOG_WARNING, "udptl structure is null\n");
00735 }

void ast_udptl_set_m_type ( struct ast_udptl udptl,
int  pt 
)

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

Definition at line 845 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp().

00846 {
00847    udptl->them.sin_port = them->sin_port;
00848    udptl->them.sin_addr = them->sin_addr;
00849 }

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

void ast_udptl_setnat ( struct ast_udptl udptl,
int  nat 
)

Definition at line 603 of file udptl.c.

References ast_udptl::nat.

Referenced by do_setnat().

00604 {
00605    udptl->nat = nat;
00606 }

int ast_udptl_settos ( struct ast_udptl udptl,
int  tos 
)

Definition at line 836 of file udptl.c.

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

Referenced by sip_alloc().

00837 {
00838    int res;
00839 
00840    if ((res = setsockopt(udptl->fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)))) 
00841       ast_log(LOG_WARNING, "UDPTL unable to set TOS to %d\n", tos);
00842    return res;
00843 }

void ast_udptl_stop ( struct ast_udptl udptl  ) 

Definition at line 864 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp(), and stop_media_flows().

00865 {
00866    memset(&udptl->them.sin_addr, 0, sizeof(udptl->them.sin_addr));
00867    memset(&udptl->them.sin_port, 0, sizeof(udptl->them.sin_port));
00868 }

int ast_udptl_write ( struct ast_udptl udptl,
struct ast_frame f 
)

Definition at line 879 of file udptl.c.

References AST_FRAME_MODEM, ast_inet_ntoa(), ast_log(), ast_verbose(), errno, f, len(), LOCAL_FAX_MAX_DATAGRAM, LOG_NOTICE, LOG_WARNING, s, seq, udptl_build_packet(), and udptl_debug_test_addr().

Referenced by sip_write().

00880 {
00881    int seq;
00882    int len;
00883    int res;
00884    uint8_t buf[LOCAL_FAX_MAX_DATAGRAM * 2];
00885 
00886    /* If we have no peer, return immediately */ 
00887    if (s->them.sin_addr.s_addr == INADDR_ANY)
00888       return 0;
00889 
00890    /* If there is no data length, return immediately */
00891    if (f->datalen == 0)
00892       return 0;
00893    
00894    if (f->frametype != AST_FRAME_MODEM) {
00895       ast_log(LOG_WARNING, "UDPTL can only send T.38 data\n");
00896       return -1;
00897    }
00898 
00899    /* Save seq_no for debug output because udptl_build_packet increments it */
00900    seq = s->tx_seq_no & 0xFFFF;
00901 
00902    /* Cook up the UDPTL packet, with the relevant EC info. */
00903    len = udptl_build_packet(s, buf, sizeof(buf), f->data, f->datalen);
00904 
00905    if (len > 0 && s->them.sin_port && s->them.sin_addr.s_addr) {
00906       if ((res = sendto(s->fd, buf, len, 0, (struct sockaddr *) &s->them, sizeof(s->them))) < 0)
00907          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));
00908 #if 0
00909       printf("Sent %d bytes of UDPTL data to %s:%d\n", res, ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00910 #endif
00911       if (udptl_debug_test_addr(&s->them))
00912          ast_verbose("Sent UDPTL packet to %s:%d (type %d, seq %d, len %d)\n",
00913                ast_inet_ntoa(s->them.sin_addr),
00914                ntohs(s->them.sin_port), 0, seq, len);
00915    }
00916       
00917    return 0;
00918 }


Generated on Sat Aug 6 00:40:06 2011 for Asterisk - the Open Source PBX by  doxygen 1.4.7