Fri Aug 24 02:28:46 2007

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>

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  { 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 1002 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_udptl_protocol::set_udptl_peer, and ast_channel::tech_pvt.

01003 {
01004    struct ast_frame *f;
01005    struct ast_channel *who;
01006    struct ast_channel *cs[3];
01007    struct ast_udptl *p0;
01008    struct ast_udptl *p1;
01009    struct ast_udptl_protocol *pr0;
01010    struct ast_udptl_protocol *pr1;
01011    struct sockaddr_in ac0;
01012    struct sockaddr_in ac1;
01013    struct sockaddr_in t0;
01014    struct sockaddr_in t1;
01015    void *pvt0;
01016    void *pvt1;
01017    int to;
01018    
01019    ast_channel_lock(c0);
01020    while (ast_channel_trylock(c1)) {
01021       ast_channel_unlock(c0);
01022       usleep(1);
01023       ast_channel_lock(c0);
01024    }
01025    pr0 = get_proto(c0);
01026    pr1 = get_proto(c1);
01027    if (!pr0) {
01028       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c0->name);
01029       ast_channel_unlock(c0);
01030       ast_channel_unlock(c1);
01031       return -1;
01032    }
01033    if (!pr1) {
01034       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c1->name);
01035       ast_channel_unlock(c0);
01036       ast_channel_unlock(c1);
01037       return -1;
01038    }
01039    pvt0 = c0->tech_pvt;
01040    pvt1 = c1->tech_pvt;
01041    p0 = pr0->get_udptl_info(c0);
01042    p1 = pr1->get_udptl_info(c1);
01043    if (!p0 || !p1) {
01044       /* Somebody doesn't want to play... */
01045       ast_channel_unlock(c0);
01046       ast_channel_unlock(c1);
01047       return -2;
01048    }
01049    if (pr0->set_udptl_peer(c0, p1)) {
01050       ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", c0->name, c1->name);
01051    } else {
01052       /* Store UDPTL peer */
01053       ast_udptl_get_peer(p1, &ac1);
01054    }
01055    if (pr1->set_udptl_peer(c1, p0))
01056       ast_log(LOG_WARNING, "Channel '%s' failed to talk back to '%s'\n", c1->name, c0->name);
01057    else {
01058       /* Store UDPTL peer */
01059       ast_udptl_get_peer(p0, &ac0);
01060    }
01061    ast_channel_unlock(c0);
01062    ast_channel_unlock(c1);
01063    cs[0] = c0;
01064    cs[1] = c1;
01065    cs[2] = NULL;
01066    for (;;) {
01067       if ((c0->tech_pvt != pvt0) ||
01068          (c1->tech_pvt != pvt1) ||
01069          (c0->masq || c0->masqr || c1->masq || c1->masqr)) {
01070             ast_log(LOG_DEBUG, "Oooh, something is weird, backing out\n");
01071             /* Tell it to try again later */
01072             return -3;
01073       }
01074       to = -1;
01075       ast_udptl_get_peer(p1, &t1);
01076       ast_udptl_get_peer(p0, &t0);
01077       if (inaddrcmp(&t1, &ac1)) {
01078          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01079             c1->name, ast_inet_ntoa(t1.sin_addr), ntohs(t1.sin_port));
01080          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01081             c1->name, ast_inet_ntoa(ac1.sin_addr), ntohs(ac1.sin_port));
01082          memcpy(&ac1, &t1, sizeof(ac1));
01083       }
01084       if (inaddrcmp(&t0, &ac0)) {
01085          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01086             c0->name, ast_inet_ntoa(t0.sin_addr), ntohs(t0.sin_port));
01087          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01088             c0->name, ast_inet_ntoa(ac0.sin_addr), ntohs(ac0.sin_port));
01089          memcpy(&ac0, &t0, sizeof(ac0));
01090       }
01091       who = ast_waitfor_n(cs, 2, &to);
01092       if (!who) {
01093          ast_log(LOG_DEBUG, "Ooh, empty read...\n");
01094          /* check for hangup / whentohangup */
01095          if (ast_check_hangup(c0) || ast_check_hangup(c1))
01096             break;
01097          continue;
01098       }
01099       f = ast_read(who);
01100       if (!f) {
01101          *fo = f;
01102          *rc = who;
01103          ast_log(LOG_DEBUG, "Oooh, got a %s\n", f ? "digit" : "hangup");
01104          /* That's all we needed */
01105          return 0;
01106       } else {
01107          if (f->frametype == AST_FRAME_MODEM) {
01108             /* Forward T.38 frames if they happen upon us */
01109             if (who == c0) {
01110                ast_write(c1, f);
01111             } else if (who == c1) {
01112                ast_write(c0, f);
01113             }
01114          }
01115          ast_frfree(f);
01116       }
01117       /* Swap priority. Not that it's a big deal at this point */
01118       cs[2] = cs[0];
01119       cs[0] = cs[1];
01120       cs[1] = cs[2];
01121    }
01122    return -1;
01123 }

void ast_udptl_destroy ( struct ast_udptl udptl  ) 

Definition at line 906 of file udptl.c.

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

Referenced by __sip_destroy(), and create_addr_from_peer().

00907 {
00908    if (udptl->ioid)
00909       ast_io_remove(udptl->io, udptl->ioid);
00910    if (udptl->fd > -1)
00911       close(udptl->fd);
00912    free(udptl);
00913 }

int ast_udptl_fd ( struct ast_udptl udptl  ) 

Definition at line 632 of file udptl.c.

References ast_udptl::fd.

Referenced by __oh323_new(), and sip_new().

00633 {
00634    return udptl->fd;
00635 }

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 723 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().

00724 {
00725    if (udptl)
00726       return udptl->error_correction_scheme;
00727    else {
00728       ast_log(LOG_WARNING, "udptl structure is null\n");
00729       return -1;
00730    }
00731 }

int ast_udptl_get_far_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 763 of file udptl.c.

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

00764 {
00765    if (udptl)
00766       return udptl->far_max_datagram_size;
00767    else {
00768       ast_log(LOG_WARNING, "udptl structure is null\n");
00769       return -1;
00770    }
00771 }

int ast_udptl_get_local_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 753 of file udptl.c.

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

Referenced by add_t38_sdp(), and sip_handle_t38_reinvite().

00754 {
00755    if (udptl)
00756       return udptl->local_max_datagram_size;
00757    else {
00758       ast_log(LOG_WARNING, "udptl structure is null\n");
00759       return -1;
00760    }
00761 }

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

Definition at line 888 of file udptl.c.

References ast_udptl::them.

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

00889 {
00890    them->sin_family = AF_INET;
00891    them->sin_port = udptl->them.sin_port;
00892    them->sin_addr = udptl->them.sin_addr;
00893 }

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

Definition at line 895 of file udptl.c.

References ast_udptl::us.

Referenced by add_t38_sdp().

00896 {
00897    memcpy(us, &udptl->us, sizeof(udptl->us));
00898 }

void ast_udptl_init ( void   ) 

Definition at line 1282 of file udptl.c.

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

Referenced by main().

01283 {
01284    ast_cli_register_multiple(cli_udptl, sizeof(cli_udptl) / sizeof(struct ast_cli_entry));
01285    ast_udptl_reload();
01286 }

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 866 of file udptl.c.

References ast_udptl_new_with_bindaddr(), io, and sched.

00867 {
00868    struct in_addr ia;
00869    memset(&ia, 0, sizeof(ia));
00870    return ast_udptl_new_with_bindaddr(sched, io, callbackmode, ia);
00871 }

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 789 of file udptl.c.

References ast_calloc, ast_io_add(), AST_IO_IN, ast_log(), ast_random(), ast_udptl::flags, free, io, LOG_WARNING, sched, UDPTL_ERROR_CORRECTION_FEC, UDPTL_ERROR_CORRECTION_NONE, UDPTL_ERROR_CORRECTION_REDUNDANCY, udptlend, udptlfecentries, udptlfecspan, udptlfectype, udptlmaxdatagram, udptlread(), and udptlstart.

Referenced by ast_udptl_new(), and sip_alloc().

00790 {
00791    struct ast_udptl *udptl;
00792    int x;
00793    int startplace;
00794    int i;
00795    long int flags;
00796 
00797    if (!(udptl = ast_calloc(1, sizeof(*udptl))))
00798       return NULL;
00799 
00800    if (udptlfectype == 2)
00801       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00802    else if (udptlfectype == 1)
00803       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00804    else
00805       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00806    udptl->error_correction_span = udptlfecspan;
00807    udptl->error_correction_entries = udptlfecentries;
00808    
00809    udptl->far_max_datagram_size = udptlmaxdatagram;
00810    udptl->local_max_datagram_size = udptlmaxdatagram;
00811 
00812    memset(&udptl->rx, 0, sizeof(udptl->rx));
00813    memset(&udptl->tx, 0, sizeof(udptl->tx));
00814    for (i = 0; i <= UDPTL_BUF_MASK; i++) {
00815       udptl->rx[i].buf_len = -1;
00816       udptl->tx[i].buf_len = -1;
00817    }
00818 
00819    udptl->seqno = ast_random() & 0xffff;
00820    udptl->them.sin_family = AF_INET;
00821    udptl->us.sin_family = AF_INET;
00822 
00823    if ((udptl->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
00824       free(udptl);
00825       ast_log(LOG_WARNING, "Unable to allocate socket: %s\n", strerror(errno));
00826       return NULL;
00827    }
00828    flags = fcntl(udptl->fd, F_GETFL);
00829    fcntl(udptl->fd, F_SETFL, flags | O_NONBLOCK);
00830 #ifdef SO_NO_CHECK
00831    if (nochecksums)
00832       setsockopt(udptl->fd, SOL_SOCKET, SO_NO_CHECK, &nochecksums, sizeof(nochecksums));
00833 #endif
00834    /* Find us a place */
00835    x = (ast_random() % (udptlend - udptlstart)) + udptlstart;
00836    startplace = x;
00837    for (;;) {
00838       udptl->us.sin_port = htons(x);
00839       udptl->us.sin_addr = addr;
00840       if (bind(udptl->fd, (struct sockaddr *) &udptl->us, sizeof(udptl->us)) == 0)
00841          break;
00842       if (errno != EADDRINUSE) {
00843          ast_log(LOG_WARNING, "Unexpected bind error: %s\n", strerror(errno));
00844          close(udptl->fd);
00845          free(udptl);
00846          return NULL;
00847       }
00848       if (++x > udptlend)
00849          x = udptlstart;
00850       if (x == startplace) {
00851          ast_log(LOG_WARNING, "No UDPTL ports remaining\n");
00852          close(udptl->fd);
00853          free(udptl);
00854          return NULL;
00855       }
00856    }
00857    if (io && sched && callbackmode) {
00858       /* Operate this one in a callback mode */
00859       udptl->sched = sched;
00860       udptl->io = io;
00861       udptl->ioid = ast_io_add(udptl->io, udptl->fd, udptlread, AST_IO_IN, udptl);
00862    }
00863    return udptl;
00864 }

void ast_udptl_offered_from_local ( struct ast_udptl udptl,
int  local 
)

Definition at line 715 of file udptl.c.

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

Referenced by transmit_invite(), transmit_reinvite_with_t38_sdp(), and transmit_response_with_t38_sdp().

00716 {
00717    if (udptl)
00718       udptl->udptl_offered_from_local = local;
00719    else
00720       ast_log(LOG_WARNING, "udptl structure is null\n");
00721 }

int ast_udptl_proto_register ( struct ast_udptl_protocol proto  ) 

Definition at line 972 of file udptl.c.

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

Referenced by load_module().

00973 {
00974    struct ast_udptl_protocol *cur;
00975 
00976    cur = protos;
00977    while (cur) {
00978       if (cur->type == proto->type) {
00979          ast_log(LOG_WARNING, "Tried to register same protocol '%s' twice\n", cur->type);
00980          return -1;
00981       }
00982       cur = cur->next;
00983    }
00984    proto->next = protos;
00985    protos = proto;
00986    return 0;
00987 }

void ast_udptl_proto_unregister ( struct ast_udptl_protocol proto  ) 

Definition at line 952 of file udptl.c.

References ast_udptl_protocol::next, and protos.

Referenced by unload_module().

00953 {
00954    struct ast_udptl_protocol *cur;
00955    struct ast_udptl_protocol *prev;
00956 
00957    cur = protos;
00958    prev = NULL;
00959    while (cur) {
00960       if (cur == proto) {
00961          if (prev)
00962             prev->next = proto->next;
00963          else
00964             protos = proto->next;
00965          return;
00966       }
00967       prev = cur;
00968       cur = cur->next;
00969    }
00970 }

struct ast_frame* ast_udptl_read ( struct ast_udptl udptl  ) 

Definition at line 664 of file udptl.c.

References AST_FRIENDLY_OFFSET, ast_inet_ntoa(), ast_log(), ast_null_frame, ast_verbose(), CRASH, 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().

00665 {
00666    int res;
00667    struct sockaddr_in sin;
00668    socklen_t len;
00669    uint16_t seqno = 0;
00670    uint16_t *udptlheader;
00671 
00672    len = sizeof(sin);
00673    
00674    /* Cache where the header will go */
00675    res = recvfrom(udptl->fd,
00676          udptl->rawdata + AST_FRIENDLY_OFFSET,
00677          sizeof(udptl->rawdata) - AST_FRIENDLY_OFFSET,
00678          0,
00679          (struct sockaddr *) &sin,
00680          &len);
00681    udptlheader = (uint16_t *)(udptl->rawdata + AST_FRIENDLY_OFFSET);
00682    if (res < 0) {
00683       if (errno != EAGAIN)
00684          ast_log(LOG_WARNING, "UDPTL read error: %s\n", strerror(errno));
00685       if (errno == EBADF)
00686          CRASH;
00687       return &ast_null_frame;
00688    }
00689 
00690    /* Ignore if the other side hasn't been given an address yet. */
00691    if (!udptl->them.sin_addr.s_addr || !udptl->them.sin_port)
00692       return &ast_null_frame;
00693 
00694    if (udptl->nat) {
00695       /* Send to whoever sent to us */
00696       if ((udptl->them.sin_addr.s_addr != sin.sin_addr.s_addr) ||
00697          (udptl->them.sin_port != sin.sin_port)) {
00698          memcpy(&udptl->them, &sin, sizeof(udptl->them));
00699          ast_log(LOG_DEBUG, "UDPTL NAT: Using address %s:%d\n", ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00700       }
00701    }
00702 
00703    if (udptl_debug_test_addr(&sin)) {
00704       ast_verbose("Got UDPTL packet from %s:%d (type %d, seq %d, len %d)\n",
00705          ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), 0, seqno, res);
00706    }
00707 #if 0
00708    printf("Got UDPTL packet from %s:%d (seq %d, len = %d)\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), seqno, res);
00709 #endif
00710    udptl_rx_packet(udptl, udptl->rawdata + AST_FRIENDLY_OFFSET, res);
00711 
00712    return &udptl->f[0];
00713 }

void ast_udptl_reload ( void   ) 

Definition at line 1206 of file udptl.c.

References ast_config_destroy(), ast_config_load(), ast_false(), ast_log(), ast_variable_retrieve(), ast_verbose(), LOCAL_FAX_MAX_DATAGRAM, LOG_WARNING, MAX_FEC_ENTRIES, MAX_FEC_SPAN, option_verbose, s, udptlend, udptlfecentries, udptlfecspan, udptlfectype, udptlmaxdatagram, udptlstart, and VERBOSE_PREFIX_2.

Referenced by ast_udptl_init().

01207 {
01208    struct ast_config *cfg;
01209    const char *s;
01210 
01211    udptlstart = 4500;
01212    udptlend = 4999;
01213    udptlfectype = 0;
01214    udptlfecentries = 0;
01215    udptlfecspan = 0;
01216    udptlmaxdatagram = 0;
01217 
01218    if ((cfg = ast_config_load("udptl.conf"))) {
01219       if ((s = ast_variable_retrieve(cfg, "general", "udptlstart"))) {
01220          udptlstart = atoi(s);
01221          if (udptlstart < 1024)
01222             udptlstart = 1024;
01223          if (udptlstart > 65535)
01224             udptlstart = 65535;
01225       }
01226       if ((s = ast_variable_retrieve(cfg, "general", "udptlend"))) {
01227          udptlend = atoi(s);
01228          if (udptlend < 1024)
01229             udptlend = 1024;
01230          if (udptlend > 65535)
01231             udptlend = 65535;
01232       }
01233       if ((s = ast_variable_retrieve(cfg, "general", "udptlchecksums"))) {
01234 #ifdef SO_NO_CHECK
01235          if (ast_false(s))
01236             nochecksums = 1;
01237          else
01238             nochecksums = 0;
01239 #else
01240          if (ast_false(s))
01241             ast_log(LOG_WARNING, "Disabling UDPTL checksums is not supported on this operating system!\n");
01242 #endif
01243       }
01244       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxUdpEC"))) {
01245          if (strcmp(s, "t38UDPFEC") == 0)
01246             udptlfectype = 2;
01247          else if (strcmp(s, "t38UDPRedundancy") == 0)
01248             udptlfectype = 1;
01249       }
01250       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxMaxDatagram"))) {
01251          udptlmaxdatagram = atoi(s);
01252          if (udptlmaxdatagram < 0)
01253             udptlmaxdatagram = 0;
01254          if (udptlmaxdatagram > LOCAL_FAX_MAX_DATAGRAM)
01255             udptlmaxdatagram = LOCAL_FAX_MAX_DATAGRAM;
01256       }
01257       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECentries"))) {
01258          udptlfecentries = atoi(s);
01259          if (udptlfecentries < 0)
01260             udptlfecentries = 0;
01261          if (udptlfecentries > MAX_FEC_ENTRIES)
01262             udptlfecentries = MAX_FEC_ENTRIES;
01263       }
01264       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECspan"))) {
01265          udptlfecspan = atoi(s);
01266          if (udptlfecspan < 0)
01267             udptlfecspan = 0;
01268          if (udptlfecspan > MAX_FEC_SPAN)
01269             udptlfecspan = MAX_FEC_SPAN;
01270       }
01271       ast_config_destroy(cfg);
01272    }
01273    if (udptlstart >= udptlend) {
01274       ast_log(LOG_WARNING, "Unreasonable values for UDPTL start/end\n");
01275       udptlstart = 4500;
01276       udptlend = 4999;
01277    }
01278    if (option_verbose > 1)
01279       ast_verbose(VERBOSE_PREFIX_2 "UDPTL allocating from port range %d -> %d\n", udptlstart, udptlend);
01280 }

void ast_udptl_reset ( struct ast_udptl udptl  ) 

void ast_udptl_set_callback ( struct ast_udptl udptl,
ast_udptl_callback  callback 
)

Definition at line 642 of file udptl.c.

References ast_udptl::callback.

00643 {
00644    udptl->callback = callback;
00645 }

void ast_udptl_set_data ( struct ast_udptl udptl,
void *  data 
)

Definition at line 637 of file udptl.c.

References ast_udptl::data.

00638 {
00639    udptl->data = data;
00640 }

void ast_udptl_set_error_correction_scheme ( struct ast_udptl udptl,
int  ec 
)

Definition at line 733 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(), and sip_handle_t38_reinvite().

00734 {
00735    if (udptl) {
00736       switch (ec) {
00737       case UDPTL_ERROR_CORRECTION_FEC:
00738          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00739          break;
00740       case UDPTL_ERROR_CORRECTION_REDUNDANCY:
00741          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00742          break;
00743       case UDPTL_ERROR_CORRECTION_NONE:
00744          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00745          break;
00746       default:
00747          ast_log(LOG_WARNING, "error correction parameter invalid\n");
00748       };
00749    } else
00750       ast_log(LOG_WARNING, "udptl structure is null\n");
00751 }

void ast_udptl_set_far_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 781 of file udptl.c.

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

Referenced by process_sdp(), and sip_handle_t38_reinvite().

00782 {
00783    if (udptl)
00784       udptl->far_max_datagram_size = max_datagram;
00785    else
00786       ast_log(LOG_WARNING, "udptl structure is null\n");
00787 }

void ast_udptl_set_local_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 773 of file udptl.c.

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

Referenced by process_sdp(), and sip_handle_t38_reinvite().

00774 {
00775    if (udptl)
00776       udptl->local_max_datagram_size = max_datagram;
00777    else
00778       ast_log(LOG_WARNING, "udptl structure is null\n");
00779 }

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 882 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp().

00883 {
00884    udptl->them.sin_port = them->sin_port;
00885    udptl->them.sin_addr = them->sin_addr;
00886 }

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 647 of file udptl.c.

References ast_udptl::nat.

Referenced by do_setnat().

00648 {
00649    udptl->nat = nat;
00650 }

int ast_udptl_settos ( struct ast_udptl udptl,
int  tos 
)

Definition at line 873 of file udptl.c.

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

Referenced by sip_alloc().

00874 {
00875    int res;
00876 
00877    if ((res = setsockopt(udptl->fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)))) 
00878       ast_log(LOG_WARNING, "UDPTL unable to set TOS to %d\n", tos);
00879    return res;
00880 }

void ast_udptl_stop ( struct ast_udptl udptl  ) 

Definition at line 900 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp(), and stop_media_flows().

00901 {
00902    memset(&udptl->them.sin_addr, 0, sizeof(udptl->them.sin_addr));
00903    memset(&udptl->them.sin_port, 0, sizeof(udptl->them.sin_port));
00904 }

int ast_udptl_write ( struct ast_udptl udptl,
struct ast_frame f 
)

Definition at line 915 of file udptl.c.

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

Referenced by sip_write().

00916 {
00917    int len;
00918    int res;
00919    uint8_t buf[LOCAL_FAX_MAX_DATAGRAM];
00920 
00921    /* If we have no peer, return immediately */ 
00922    if (s->them.sin_addr.s_addr == INADDR_ANY)
00923       return 0;
00924 
00925    /* If there is no data length, return immediately */
00926    if (f->datalen == 0)
00927       return 0;
00928    
00929    if (f->frametype != AST_FRAME_MODEM) {
00930       ast_log(LOG_WARNING, "UDPTL can only send T.38 data\n");
00931       return -1;
00932    }
00933 
00934    /* Cook up the UDPTL packet, with the relevant EC info. */
00935    len = udptl_build_packet(s, buf, f->data, f->datalen);
00936 
00937    if (len > 0 && s->them.sin_port && s->them.sin_addr.s_addr) {
00938       if ((res = sendto(s->fd, buf, len, 0, (struct sockaddr *) &s->them, sizeof(s->them))) < 0)
00939          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));
00940 #if 0
00941       printf("Sent %d bytes of UDPTL data to %s:%d\n", res, ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00942 #endif
00943       if (udptl_debug_test_addr(&s->them))
00944          ast_verbose("Sent UDPTL packet to %s:%d (type %d, seq %d, len %d)\n",
00945                ast_inet_ntoa(s->them.sin_addr),
00946                ntohs(s->them.sin_port), 0, s->seqno, len);
00947    }
00948       
00949    return 0;
00950 }


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