Wed Aug 15 01:25:36 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)
struct ast_udptlast_udptl_new (struct sched_context *sched, struct io_context *io, int callbackmode)
struct 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)
struct 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, ast_frame::frametype, 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.

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    } else {
01020       /* Store UDPTL peer */
01021       ast_udptl_get_peer(p1, &ac1);
01022    }
01023    if (pr1->set_udptl_peer(c1, p0))
01024       ast_log(LOG_WARNING, "Channel '%s' failed to talk back to '%s'\n", c1->name, c0->name);
01025    else {
01026       /* Store UDPTL peer */
01027       ast_udptl_get_peer(p0, &ac0);
01028    }
01029    ast_channel_unlock(c0);
01030    ast_channel_unlock(c1);
01031    cs[0] = c0;
01032    cs[1] = c1;
01033    cs[2] = NULL;
01034    for (;;) {
01035       if ((c0->tech_pvt != pvt0) ||
01036          (c1->tech_pvt != pvt1) ||
01037          (c0->masq || c0->masqr || c1->masq || c1->masqr)) {
01038             ast_log(LOG_DEBUG, "Oooh, something is weird, backing out\n");
01039             /* Tell it to try again later */
01040             return -3;
01041       }
01042       to = -1;
01043       ast_udptl_get_peer(p1, &t1);
01044       ast_udptl_get_peer(p0, &t0);
01045       if (inaddrcmp(&t1, &ac1)) {
01046          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01047             c1->name, ast_inet_ntoa(t1.sin_addr), ntohs(t1.sin_port));
01048          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01049             c1->name, ast_inet_ntoa(ac1.sin_addr), ntohs(ac1.sin_port));
01050          memcpy(&ac1, &t1, sizeof(ac1));
01051       }
01052       if (inaddrcmp(&t0, &ac0)) {
01053          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01054             c0->name, ast_inet_ntoa(t0.sin_addr), ntohs(t0.sin_port));
01055          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01056             c0->name, ast_inet_ntoa(ac0.sin_addr), ntohs(ac0.sin_port));
01057          memcpy(&ac0, &t0, sizeof(ac0));
01058       }
01059       who = ast_waitfor_n(cs, 2, &to);
01060       if (!who) {
01061          ast_log(LOG_DEBUG, "Ooh, empty read...\n");
01062          /* check for hangup / whentohangup */
01063          if (ast_check_hangup(c0) || ast_check_hangup(c1))
01064             break;
01065          continue;
01066       }
01067       f = ast_read(who);
01068       if (!f) {
01069          *fo = f;
01070          *rc = who;
01071          ast_log(LOG_DEBUG, "Oooh, got a %s\n", f ? "digit" : "hangup");
01072          /* That's all we needed */
01073          return 0;
01074       } else {
01075          if (f->frametype == AST_FRAME_MODEM) {
01076             /* Forward T.38 frames if they happen upon us */
01077             if (who == c0) {
01078                ast_write(c1, f);
01079             } else if (who == c1) {
01080                ast_write(c0, f);
01081             }
01082          }
01083          ast_frfree(f);
01084       }
01085       /* Swap priority. Not that it's a big deal at this point */
01086       cs[2] = cs[0];
01087       cs[0] = cs[1];
01088       cs[1] = cs[2];
01089    }
01090    return -1;
01091 }

void ast_udptl_destroy ( struct ast_udptl udptl  ) 

Definition at line 874 of file udptl.c.

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

00875 {
00876    if (udptl->ioid)
00877       ast_io_remove(udptl->io, udptl->ioid);
00878    if (udptl->fd > -1)
00879       close(udptl->fd);
00880    free(udptl);
00881 }

int ast_udptl_fd ( struct ast_udptl udptl  ) 

Definition at line 600 of file udptl.c.

References ast_udptl::fd.

00601 {
00602    return udptl->fd;
00603 }

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 691 of file udptl.c.

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

00692 {
00693    if (udptl)
00694       return udptl->error_correction_scheme;
00695    else {
00696       ast_log(LOG_WARNING, "udptl structure is null\n");
00697       return -1;
00698    }
00699 }

int ast_udptl_get_far_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 731 of file udptl.c.

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

00732 {
00733    if (udptl)
00734       return udptl->far_max_datagram_size;
00735    else {
00736       ast_log(LOG_WARNING, "udptl structure is null\n");
00737       return -1;
00738    }
00739 }

int ast_udptl_get_local_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 721 of file udptl.c.

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

00722 {
00723    if (udptl)
00724       return udptl->local_max_datagram_size;
00725    else {
00726       ast_log(LOG_WARNING, "udptl structure is null\n");
00727       return -1;
00728    }
00729 }

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

Definition at line 856 of file udptl.c.

References ast_udptl::them.

00857 {
00858    them->sin_family = AF_INET;
00859    them->sin_port = udptl->them.sin_port;
00860    them->sin_addr = udptl->them.sin_addr;
00861 }

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

Definition at line 863 of file udptl.c.

References ast_udptl::us.

00864 {
00865    memcpy(us, &udptl->us, sizeof(udptl->us));
00866 }

void ast_udptl_init ( void   ) 

Definition at line 1250 of file udptl.c.

References ast_cli_register_multiple(), and ast_udptl_reload().

01251 {
01252    ast_cli_register_multiple(cli_udptl, sizeof(cli_udptl) / sizeof(struct ast_cli_entry));
01253    ast_udptl_reload();
01254 }

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 
) [read]

Definition at line 834 of file udptl.c.

References ast_udptl_new_with_bindaddr().

00835 {
00836    struct in_addr ia;
00837    memset(&ia, 0, sizeof(ia));
00838    return ast_udptl_new_with_bindaddr(sched, io, callbackmode, ia);
00839 }

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 757 of file udptl.c.

References ast_calloc, ast_io_add(), AST_IO_IN, ast_log(), ast_random(), udptl_fec_tx_buffer_t::buf_len, udptl_fec_rx_buffer_t::buf_len, ast_udptl::error_correction_entries, ast_udptl::error_correction_scheme, ast_udptl::error_correction_span, ast_udptl::far_max_datagram_size, ast_udptl::fd, ast_udptl::flags, free, ast_udptl::io, ast_udptl::ioid, ast_udptl::local_max_datagram_size, LOG_WARNING, ast_udptl::rx, ast_udptl::sched, ast_udptl::seqno, ast_udptl::them, ast_udptl::tx, UDPTL_BUF_MASK, UDPTL_ERROR_CORRECTION_FEC, UDPTL_ERROR_CORRECTION_NONE, UDPTL_ERROR_CORRECTION_REDUNDANCY, udptlread(), and ast_udptl::us.

00758 {
00759    struct ast_udptl *udptl;
00760    int x;
00761    int startplace;
00762    int i;
00763    long int flags;
00764 
00765    if (!(udptl = ast_calloc(1, sizeof(*udptl))))
00766       return NULL;
00767 
00768    if (udptlfectype == 2)
00769       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00770    else if (udptlfectype == 1)
00771       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00772    else
00773       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00774    udptl->error_correction_span = udptlfecspan;
00775    udptl->error_correction_entries = udptlfecentries;
00776    
00777    udptl->far_max_datagram_size = udptlmaxdatagram;
00778    udptl->local_max_datagram_size = udptlmaxdatagram;
00779 
00780    memset(&udptl->rx, 0, sizeof(udptl->rx));
00781    memset(&udptl->tx, 0, sizeof(udptl->tx));
00782    for (i = 0; i <= UDPTL_BUF_MASK; i++) {
00783       udptl->rx[i].buf_len = -1;
00784       udptl->tx[i].buf_len = -1;
00785    }
00786 
00787    udptl->seqno = ast_random() & 0xffff;
00788    udptl->them.sin_family = AF_INET;
00789    udptl->us.sin_family = AF_INET;
00790 
00791    if ((udptl->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
00792       free(udptl);
00793       ast_log(LOG_WARNING, "Unable to allocate socket: %s\n", strerror(errno));
00794       return NULL;
00795    }
00796    flags = fcntl(udptl->fd, F_GETFL);
00797    fcntl(udptl->fd, F_SETFL, flags | O_NONBLOCK);
00798 #ifdef SO_NO_CHECK
00799    if (nochecksums)
00800       setsockopt(udptl->fd, SOL_SOCKET, SO_NO_CHECK, &nochecksums, sizeof(nochecksums));
00801 #endif
00802    /* Find us a place */
00803    x = (ast_random() % (udptlend - udptlstart)) + udptlstart;
00804    startplace = x;
00805    for (;;) {
00806       udptl->us.sin_port = htons(x);
00807       udptl->us.sin_addr = addr;
00808       if (bind(udptl->fd, (struct sockaddr *) &udptl->us, sizeof(udptl->us)) == 0)
00809          break;
00810       if (errno != EADDRINUSE) {
00811          ast_log(LOG_WARNING, "Unexpected bind error: %s\n", strerror(errno));
00812          close(udptl->fd);
00813          free(udptl);
00814          return NULL;
00815       }
00816       if (++x > udptlend)
00817          x = udptlstart;
00818       if (x == startplace) {
00819          ast_log(LOG_WARNING, "No UDPTL ports remaining\n");
00820          close(udptl->fd);
00821          free(udptl);
00822          return NULL;
00823       }
00824    }
00825    if (io && sched && callbackmode) {
00826       /* Operate this one in a callback mode */
00827       udptl->sched = sched;
00828       udptl->io = io;
00829       udptl->ioid = ast_io_add(udptl->io, udptl->fd, udptlread, AST_IO_IN, udptl);
00830    }
00831    return udptl;
00832 }

void ast_udptl_offered_from_local ( struct ast_udptl udptl,
int  local 
)

Definition at line 683 of file udptl.c.

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

00684 {
00685    if (udptl)
00686       udptl->udptl_offered_from_local = local;
00687    else
00688       ast_log(LOG_WARNING, "udptl structure is null\n");
00689 }

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, and ast_udptl_protocol::type.

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.

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  )  [read]

Definition at line 632 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().

00633 {
00634    int res;
00635    struct sockaddr_in sin;
00636    socklen_t len;
00637    uint16_t seqno = 0;
00638    uint16_t *udptlheader;
00639 
00640    len = sizeof(sin);
00641    
00642    /* Cache where the header will go */
00643    res = recvfrom(udptl->fd,
00644          udptl->rawdata + AST_FRIENDLY_OFFSET,
00645          sizeof(udptl->rawdata) - AST_FRIENDLY_OFFSET,
00646          0,
00647          (struct sockaddr *) &sin,
00648          &len);
00649    udptlheader = (uint16_t *)(udptl->rawdata + AST_FRIENDLY_OFFSET);
00650    if (res < 0) {
00651       if (errno != EAGAIN)
00652          ast_log(LOG_WARNING, "UDPTL read error: %s\n", strerror(errno));
00653       if (errno == EBADF)
00654          CRASH;
00655       return &ast_null_frame;
00656    }
00657 
00658    /* Ignore if the other side hasn't been given an address yet. */
00659    if (!udptl->them.sin_addr.s_addr || !udptl->them.sin_port)
00660       return &ast_null_frame;
00661 
00662    if (udptl->nat) {
00663       /* Send to whoever sent to us */
00664       if ((udptl->them.sin_addr.s_addr != sin.sin_addr.s_addr) ||
00665          (udptl->them.sin_port != sin.sin_port)) {
00666          memcpy(&udptl->them, &sin, sizeof(udptl->them));
00667          ast_log(LOG_DEBUG, "UDPTL NAT: Using address %s:%d\n", ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00668       }
00669    }
00670 
00671    if (udptl_debug_test_addr(&sin)) {
00672       ast_verbose("Got UDPTL packet from %s:%d (type %d, seq %d, len %d)\n",
00673          ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), 0, seqno, res);
00674    }
00675 #if 0
00676    printf("Got UDPTL packet from %s:%d (seq %d, len = %d)\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), seqno, res);
00677 #endif
00678    udptl_rx_packet(udptl, udptl->rawdata + AST_FRIENDLY_OFFSET, res);
00679 
00680    return &udptl->f[0];
00681 }

void ast_udptl_reload ( void   ) 

Definition at line 1174 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, and VERBOSE_PREFIX_2.

01175 {
01176    struct ast_config *cfg;
01177    const char *s;
01178 
01179    udptlstart = 4500;
01180    udptlend = 4999;
01181    udptlfectype = 0;
01182    udptlfecentries = 0;
01183    udptlfecspan = 0;
01184    udptlmaxdatagram = 0;
01185 
01186    if ((cfg = ast_config_load("udptl.conf"))) {
01187       if ((s = ast_variable_retrieve(cfg, "general", "udptlstart"))) {
01188          udptlstart = atoi(s);
01189          if (udptlstart < 1024)
01190             udptlstart = 1024;
01191          if (udptlstart > 65535)
01192             udptlstart = 65535;
01193       }
01194       if ((s = ast_variable_retrieve(cfg, "general", "udptlend"))) {
01195          udptlend = atoi(s);
01196          if (udptlend < 1024)
01197             udptlend = 1024;
01198          if (udptlend > 65535)
01199             udptlend = 65535;
01200       }
01201       if ((s = ast_variable_retrieve(cfg, "general", "udptlchecksums"))) {
01202 #ifdef SO_NO_CHECK
01203          if (ast_false(s))
01204             nochecksums = 1;
01205          else
01206             nochecksums = 0;
01207 #else
01208          if (ast_false(s))
01209             ast_log(LOG_WARNING, "Disabling UDPTL checksums is not supported on this operating system!\n");
01210 #endif
01211       }
01212       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxUdpEC"))) {
01213          if (strcmp(s, "t38UDPFEC") == 0)
01214             udptlfectype = 2;
01215          else if (strcmp(s, "t38UDPRedundancy") == 0)
01216             udptlfectype = 1;
01217       }
01218       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxMaxDatagram"))) {
01219          udptlmaxdatagram = atoi(s);
01220          if (udptlmaxdatagram < 0)
01221             udptlmaxdatagram = 0;
01222          if (udptlmaxdatagram > LOCAL_FAX_MAX_DATAGRAM)
01223             udptlmaxdatagram = LOCAL_FAX_MAX_DATAGRAM;
01224       }
01225       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECentries"))) {
01226          udptlfecentries = atoi(s);
01227          if (udptlfecentries < 0)
01228             udptlfecentries = 0;
01229          if (udptlfecentries > MAX_FEC_ENTRIES)
01230             udptlfecentries = MAX_FEC_ENTRIES;
01231       }
01232       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECspan"))) {
01233          udptlfecspan = atoi(s);
01234          if (udptlfecspan < 0)
01235             udptlfecspan = 0;
01236          if (udptlfecspan > MAX_FEC_SPAN)
01237             udptlfecspan = MAX_FEC_SPAN;
01238       }
01239       ast_config_destroy(cfg);
01240    }
01241    if (udptlstart >= udptlend) {
01242       ast_log(LOG_WARNING, "Unreasonable values for UDPTL start/end\n");
01243       udptlstart = 4500;
01244       udptlend = 4999;
01245    }
01246    if (option_verbose > 1)
01247       ast_verbose(VERBOSE_PREFIX_2 "UDPTL allocating from port range %d -> %d\n", udptlstart, udptlend);
01248 }

void ast_udptl_reset ( struct ast_udptl udptl  ) 

void ast_udptl_set_callback ( struct ast_udptl udptl,
ast_udptl_callback  callback 
)

Definition at line 610 of file udptl.c.

References ast_udptl::callback.

00611 {
00612    udptl->callback = callback;
00613 }

void ast_udptl_set_data ( struct ast_udptl udptl,
void *  data 
)

Definition at line 605 of file udptl.c.

References ast_udptl::data.

00606 {
00607    udptl->data = data;
00608 }

void ast_udptl_set_error_correction_scheme ( struct ast_udptl udptl,
int  ec 
)

Definition at line 701 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.

00702 {
00703    if (udptl) {
00704       switch (ec) {
00705       case UDPTL_ERROR_CORRECTION_FEC:
00706          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00707          break;
00708       case UDPTL_ERROR_CORRECTION_REDUNDANCY:
00709          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00710          break;
00711       case UDPTL_ERROR_CORRECTION_NONE:
00712          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00713          break;
00714       default:
00715          ast_log(LOG_WARNING, "error correction parameter invalid\n");
00716       };
00717    } else
00718       ast_log(LOG_WARNING, "udptl structure is null\n");
00719 }

void ast_udptl_set_far_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 749 of file udptl.c.

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

00750 {
00751    if (udptl)
00752       udptl->far_max_datagram_size = max_datagram;
00753    else
00754       ast_log(LOG_WARNING, "udptl structure is null\n");
00755 }

void ast_udptl_set_local_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 741 of file udptl.c.

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

00742 {
00743    if (udptl)
00744       udptl->local_max_datagram_size = max_datagram;
00745    else
00746       ast_log(LOG_WARNING, "udptl structure is null\n");
00747 }

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 850 of file udptl.c.

References ast_udptl::them.

00851 {
00852    udptl->them.sin_port = them->sin_port;
00853    udptl->them.sin_addr = them->sin_addr;
00854 }

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 615 of file udptl.c.

References ast_udptl::nat.

00616 {
00617    udptl->nat = nat;
00618 }

int ast_udptl_settos ( struct ast_udptl udptl,
int  tos 
)

Definition at line 841 of file udptl.c.

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

00842 {
00843    int res;
00844 
00845    if ((res = setsockopt(udptl->fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)))) 
00846       ast_log(LOG_WARNING, "UDPTL unable to set TOS to %d\n", tos);
00847    return res;
00848 }

void ast_udptl_stop ( struct ast_udptl udptl  ) 

Definition at line 868 of file udptl.c.

References ast_udptl::them.

00869 {
00870    memset(&udptl->them.sin_addr, 0, sizeof(udptl->them.sin_addr));
00871    memset(&udptl->them.sin_port, 0, sizeof(udptl->them.sin_port));
00872 }

int ast_udptl_write ( struct ast_udptl udptl,
struct ast_frame f 
)

Definition at line 883 of file udptl.c.

References AST_FRAME_MODEM, ast_inet_ntoa(), ast_log(), ast_verbose(), ast_frame::data, ast_frame::datalen, ast_udptl::fd, ast_frame::frametype, len, LOCAL_FAX_MAX_DATAGRAM, LOG_NOTICE, LOG_WARNING, ast_udptl::seqno, ast_udptl::them, udptl_build_packet(), and udptl_debug_test_addr().

00884 {
00885    int len;
00886    int res;
00887    uint8_t buf[LOCAL_FAX_MAX_DATAGRAM];
00888 
00889    /* If we have no peer, return immediately */ 
00890    if (s->them.sin_addr.s_addr == INADDR_ANY)
00891       return 0;
00892 
00893    /* If there is no data length, return immediately */
00894    if (f->datalen == 0)
00895       return 0;
00896    
00897    if (f->frametype != AST_FRAME_MODEM) {
00898       ast_log(LOG_WARNING, "UDPTL can only send T.38 data\n");
00899       return -1;
00900    }
00901 
00902    /* Cook up the UDPTL packet, with the relevant EC info. */
00903    len = udptl_build_packet(s, 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, s->seqno, len);
00915    }
00916       
00917    return 0;
00918 }


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