Mon Mar 31 07:42:48 2008

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 996 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.

00997 {
00998    struct ast_frame *f;
00999    struct ast_channel *who;
01000    struct ast_channel *cs[3];
01001    struct ast_udptl *p0;
01002    struct ast_udptl *p1;
01003    struct ast_udptl_protocol *pr0;
01004    struct ast_udptl_protocol *pr1;
01005    struct sockaddr_in ac0;
01006    struct sockaddr_in ac1;
01007    struct sockaddr_in t0;
01008    struct sockaddr_in t1;
01009    void *pvt0;
01010    void *pvt1;
01011    int to;
01012    
01013    ast_channel_lock(c0);
01014    while (ast_channel_trylock(c1)) {
01015       ast_channel_unlock(c0);
01016       usleep(1);
01017       ast_channel_lock(c0);
01018    }
01019    pr0 = get_proto(c0);
01020    pr1 = get_proto(c1);
01021    if (!pr0) {
01022       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c0->name);
01023       ast_channel_unlock(c0);
01024       ast_channel_unlock(c1);
01025       return -1;
01026    }
01027    if (!pr1) {
01028       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c1->name);
01029       ast_channel_unlock(c0);
01030       ast_channel_unlock(c1);
01031       return -1;
01032    }
01033    pvt0 = c0->tech_pvt;
01034    pvt1 = c1->tech_pvt;
01035    p0 = pr0->get_udptl_info(c0);
01036    p1 = pr1->get_udptl_info(c1);
01037    if (!p0 || !p1) {
01038       /* Somebody doesn't want to play... */
01039       ast_channel_unlock(c0);
01040       ast_channel_unlock(c1);
01041       return -2;
01042    }
01043    if (pr0->set_udptl_peer(c0, p1)) {
01044       ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", c0->name, c1->name);
01045       memset(&ac1, 0, sizeof(ac1));
01046    } else {
01047       /* Store UDPTL peer */
01048       ast_udptl_get_peer(p1, &ac1);
01049    }
01050    if (pr1->set_udptl_peer(c1, p0)) {
01051       ast_log(LOG_WARNING, "Channel '%s' failed to talk back to '%s'\n", c1->name, c0->name);
01052       memset(&ac0, 0, sizeof(ac0));
01053    } else {
01054       /* Store UDPTL peer */
01055       ast_udptl_get_peer(p0, &ac0);
01056    }
01057    ast_channel_unlock(c0);
01058    ast_channel_unlock(c1);
01059    cs[0] = c0;
01060    cs[1] = c1;
01061    cs[2] = NULL;
01062    for (;;) {
01063       if ((c0->tech_pvt != pvt0) ||
01064          (c1->tech_pvt != pvt1) ||
01065          (c0->masq || c0->masqr || c1->masq || c1->masqr)) {
01066             ast_log(LOG_DEBUG, "Oooh, something is weird, backing out\n");
01067             /* Tell it to try again later */
01068             return -3;
01069       }
01070       to = -1;
01071       ast_udptl_get_peer(p1, &t1);
01072       ast_udptl_get_peer(p0, &t0);
01073       if (inaddrcmp(&t1, &ac1)) {
01074          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01075             c1->name, ast_inet_ntoa(t1.sin_addr), ntohs(t1.sin_port));
01076          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01077             c1->name, ast_inet_ntoa(ac1.sin_addr), ntohs(ac1.sin_port));
01078          memcpy(&ac1, &t1, sizeof(ac1));
01079       }
01080       if (inaddrcmp(&t0, &ac0)) {
01081          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01082             c0->name, ast_inet_ntoa(t0.sin_addr), ntohs(t0.sin_port));
01083          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01084             c0->name, ast_inet_ntoa(ac0.sin_addr), ntohs(ac0.sin_port));
01085          memcpy(&ac0, &t0, sizeof(ac0));
01086       }
01087       who = ast_waitfor_n(cs, 2, &to);
01088       if (!who) {
01089          ast_log(LOG_DEBUG, "Ooh, empty read...\n");
01090          /* check for hangup / whentohangup */
01091          if (ast_check_hangup(c0) || ast_check_hangup(c1))
01092             break;
01093          continue;
01094       }
01095       f = ast_read(who);
01096       if (!f) {
01097          *fo = f;
01098          *rc = who;
01099          ast_log(LOG_DEBUG, "Oooh, got a %s\n", f ? "digit" : "hangup");
01100          /* That's all we needed */
01101          return 0;
01102       } else {
01103          if (f->frametype == AST_FRAME_MODEM) {
01104             /* Forward T.38 frames if they happen upon us */
01105             if (who == c0) {
01106                ast_write(c1, f);
01107             } else if (who == c1) {
01108                ast_write(c0, f);
01109             }
01110          }
01111          ast_frfree(f);
01112       }
01113       /* Swap priority. Not that it's a big deal at this point */
01114       cs[2] = cs[0];
01115       cs[0] = cs[1];
01116       cs[1] = cs[2];
01117    }
01118    return -1;
01119 }

void ast_udptl_destroy ( struct ast_udptl udptl  ) 

Definition at line 896 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().

00897 {
00898    if (udptl->ioid)
00899       ast_io_remove(udptl->io, udptl->ioid);
00900    if (udptl->fd > -1)
00901       close(udptl->fd);
00902    free(udptl);
00903 }

int ast_udptl_fd ( struct ast_udptl udptl  ) 

Definition at line 621 of file udptl.c.

References ast_udptl::fd.

Referenced by __oh323_new(), and sip_new().

00622 {
00623    return udptl->fd;
00624 }

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 713 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().

00714 {
00715    if (udptl)
00716       return udptl->error_correction_scheme;
00717    else {
00718       ast_log(LOG_WARNING, "udptl structure is null\n");
00719       return -1;
00720    }
00721 }

int ast_udptl_get_far_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 753 of file udptl.c.

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

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

int ast_udptl_get_local_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 743 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().

00744 {
00745    if (udptl)
00746       return udptl->local_max_datagram_size;
00747    else {
00748       ast_log(LOG_WARNING, "udptl structure is null\n");
00749       return -1;
00750    }
00751 }

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

Definition at line 877 of file udptl.c.

References ast_udptl::them.

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

00878 {
00879    memset(them, 0, sizeof(*them));
00880    them->sin_family = AF_INET;
00881    them->sin_port = udptl->them.sin_port;
00882    them->sin_addr = udptl->them.sin_addr;
00883 }

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

Definition at line 885 of file udptl.c.

References ast_udptl::us.

Referenced by add_t38_sdp().

00886 {
00887    memcpy(us, &udptl->us, sizeof(udptl->us));
00888 }

void ast_udptl_init ( void   ) 

Definition at line 1278 of file udptl.c.

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

Referenced by main().

01279 {
01280    ast_cli_register_multiple(cli_udptl, sizeof(cli_udptl) / sizeof(struct ast_cli_entry));
01281    ast_udptl_reload();
01282 }

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 855 of file udptl.c.

References ast_udptl_new_with_bindaddr(), io, and sched.

00856 {
00857    struct in_addr ia;
00858    memset(&ia, 0, sizeof(ia));
00859    return ast_udptl_new_with_bindaddr(sched, io, callbackmode, ia);
00860 }

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 779 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().

00780 {
00781    struct ast_udptl *udptl;
00782    int x;
00783    int startplace;
00784    int i;
00785    long int flags;
00786 
00787    if (!(udptl = ast_calloc(1, sizeof(*udptl))))
00788       return NULL;
00789 
00790    if (udptlfectype == 2)
00791       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00792    else if (udptlfectype == 1)
00793       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00794    else
00795       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00796    udptl->error_correction_span = udptlfecspan;
00797    udptl->error_correction_entries = udptlfecentries;
00798    
00799    udptl->far_max_datagram_size = udptlmaxdatagram;
00800    udptl->local_max_datagram_size = udptlmaxdatagram;
00801 
00802    memset(&udptl->rx, 0, sizeof(udptl->rx));
00803    memset(&udptl->tx, 0, sizeof(udptl->tx));
00804    for (i = 0; i <= UDPTL_BUF_MASK; i++) {
00805       udptl->rx[i].buf_len = -1;
00806       udptl->tx[i].buf_len = -1;
00807    }
00808 
00809    udptl->them.sin_family = AF_INET;
00810    udptl->us.sin_family = AF_INET;
00811 
00812    if ((udptl->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
00813       free(udptl);
00814       ast_log(LOG_WARNING, "Unable to allocate socket: %s\n", strerror(errno));
00815       return NULL;
00816    }
00817    flags = fcntl(udptl->fd, F_GETFL);
00818    fcntl(udptl->fd, F_SETFL, flags | O_NONBLOCK);
00819 #ifdef SO_NO_CHECK
00820    if (nochecksums)
00821       setsockopt(udptl->fd, SOL_SOCKET, SO_NO_CHECK, &nochecksums, sizeof(nochecksums));
00822 #endif
00823    /* Find us a place */
00824    x = (ast_random() % (udptlend - udptlstart)) + udptlstart;
00825    startplace = x;
00826    for (;;) {
00827       udptl->us.sin_port = htons(x);
00828       udptl->us.sin_addr = addr;
00829       if (bind(udptl->fd, (struct sockaddr *) &udptl->us, sizeof(udptl->us)) == 0)
00830          break;
00831       if (errno != EADDRINUSE) {
00832          ast_log(LOG_WARNING, "Unexpected bind error: %s\n", strerror(errno));
00833          close(udptl->fd);
00834          free(udptl);
00835          return NULL;
00836       }
00837       if (++x > udptlend)
00838          x = udptlstart;
00839       if (x == startplace) {
00840          ast_log(LOG_WARNING, "No UDPTL ports remaining\n");
00841          close(udptl->fd);
00842          free(udptl);
00843          return NULL;
00844       }
00845    }
00846    if (io && sched && callbackmode) {
00847       /* Operate this one in a callback mode */
00848       udptl->sched = sched;
00849       udptl->io = io;
00850       udptl->ioid = ast_io_add(udptl->io, udptl->fd, udptlread, AST_IO_IN, udptl);
00851    }
00852    return udptl;
00853 }

void ast_udptl_offered_from_local ( struct ast_udptl udptl,
int  local 
)

Definition at line 705 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().

00706 {
00707    if (udptl)
00708       udptl->udptl_offered_from_local = local;
00709    else
00710       ast_log(LOG_WARNING, "udptl structure is null\n");
00711 }

int ast_udptl_proto_register ( struct ast_udptl_protocol proto  ) 

Definition at line 966 of file udptl.c.

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

Referenced by load_module().

00967 {
00968    struct ast_udptl_protocol *cur;
00969 
00970    cur = protos;
00971    while (cur) {
00972       if (cur->type == proto->type) {
00973          ast_log(LOG_WARNING, "Tried to register same protocol '%s' twice\n", cur->type);
00974          return -1;
00975       }
00976       cur = cur->next;
00977    }
00978    proto->next = protos;
00979    protos = proto;
00980    return 0;
00981 }

void ast_udptl_proto_unregister ( struct ast_udptl_protocol proto  ) 

Definition at line 946 of file udptl.c.

References ast_udptl_protocol::next, and protos.

Referenced by unload_module().

00947 {
00948    struct ast_udptl_protocol *cur;
00949    struct ast_udptl_protocol *prev;
00950 
00951    cur = protos;
00952    prev = NULL;
00953    while (cur) {
00954       if (cur == proto) {
00955          if (prev)
00956             prev->next = proto->next;
00957          else
00958             protos = proto->next;
00959          return;
00960       }
00961       prev = cur;
00962       cur = cur->next;
00963    }
00964 }

struct ast_frame* ast_udptl_read ( struct ast_udptl udptl  ) 

Definition at line 653 of file udptl.c.

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

00654 {
00655    int res;
00656    struct sockaddr_in sin;
00657    socklen_t len;
00658    uint16_t seqno = 0;
00659    uint16_t *udptlheader;
00660 
00661    len = sizeof(sin);
00662    
00663    /* Cache where the header will go */
00664    res = recvfrom(udptl->fd,
00665          udptl->rawdata + AST_FRIENDLY_OFFSET,
00666          sizeof(udptl->rawdata) - AST_FRIENDLY_OFFSET,
00667          0,
00668          (struct sockaddr *) &sin,
00669          &len);
00670    udptlheader = (uint16_t *)(udptl->rawdata + AST_FRIENDLY_OFFSET);
00671    if (res < 0) {
00672       if (errno != EAGAIN)
00673          ast_log(LOG_WARNING, "UDPTL read error: %s\n", strerror(errno));
00674       if (errno == EBADF)
00675          CRASH;
00676       return &ast_null_frame;
00677    }
00678 
00679    /* Ignore if the other side hasn't been given an address yet. */
00680    if (!udptl->them.sin_addr.s_addr || !udptl->them.sin_port)
00681       return &ast_null_frame;
00682 
00683    if (udptl->nat) {
00684       /* Send to whoever sent to us */
00685       if ((udptl->them.sin_addr.s_addr != sin.sin_addr.s_addr) ||
00686          (udptl->them.sin_port != sin.sin_port)) {
00687          memcpy(&udptl->them, &sin, sizeof(udptl->them));
00688          ast_log(LOG_DEBUG, "UDPTL NAT: Using address %s:%d\n", ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00689       }
00690    }
00691 
00692    if (udptl_debug_test_addr(&sin)) {
00693       ast_verbose("Got UDPTL packet from %s:%d (type %d, seq %d, len %d)\n",
00694          ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), 0, seqno, res);
00695    }
00696 #if 0
00697    printf("Got UDPTL packet from %s:%d (seq %d, len = %d)\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), seqno, res);
00698 #endif
00699    if (udptl_rx_packet(udptl, udptl->rawdata + AST_FRIENDLY_OFFSET, res) < 1)
00700       return &ast_null_frame;
00701 
00702    return &udptl->f[0];
00703 }

void ast_udptl_reload ( void   ) 

Definition at line 1202 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.

Referenced by ast_udptl_init().

01203 {
01204    struct ast_config *cfg;
01205    const char *s;
01206 
01207    udptlstart = 4500;
01208    udptlend = 4999;
01209    udptlfectype = 0;
01210    udptlfecentries = 0;
01211    udptlfecspan = 0;
01212    udptlmaxdatagram = 0;
01213 
01214    if ((cfg = ast_config_load("udptl.conf"))) {
01215       if ((s = ast_variable_retrieve(cfg, "general", "udptlstart"))) {
01216          udptlstart = atoi(s);
01217          if (udptlstart < 1024)
01218             udptlstart = 1024;
01219          if (udptlstart > 65535)
01220             udptlstart = 65535;
01221       }
01222       if ((s = ast_variable_retrieve(cfg, "general", "udptlend"))) {
01223          udptlend = atoi(s);
01224          if (udptlend < 1024)
01225             udptlend = 1024;
01226          if (udptlend > 65535)
01227             udptlend = 65535;
01228       }
01229       if ((s = ast_variable_retrieve(cfg, "general", "udptlchecksums"))) {
01230 #ifdef SO_NO_CHECK
01231          if (ast_false(s))
01232             nochecksums = 1;
01233          else
01234             nochecksums = 0;
01235 #else
01236          if (ast_false(s))
01237             ast_log(LOG_WARNING, "Disabling UDPTL checksums is not supported on this operating system!\n");
01238 #endif
01239       }
01240       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxUdpEC"))) {
01241          if (strcmp(s, "t38UDPFEC") == 0)
01242             udptlfectype = 2;
01243          else if (strcmp(s, "t38UDPRedundancy") == 0)
01244             udptlfectype = 1;
01245       }
01246       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxMaxDatagram"))) {
01247          udptlmaxdatagram = atoi(s);
01248          if (udptlmaxdatagram < 0)
01249             udptlmaxdatagram = 0;
01250          if (udptlmaxdatagram > LOCAL_FAX_MAX_DATAGRAM)
01251             udptlmaxdatagram = LOCAL_FAX_MAX_DATAGRAM;
01252       }
01253       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECentries"))) {
01254          udptlfecentries = atoi(s);
01255          if (udptlfecentries < 0)
01256             udptlfecentries = 0;
01257          if (udptlfecentries > MAX_FEC_ENTRIES)
01258             udptlfecentries = MAX_FEC_ENTRIES;
01259       }
01260       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECspan"))) {
01261          udptlfecspan = atoi(s);
01262          if (udptlfecspan < 0)
01263             udptlfecspan = 0;
01264          if (udptlfecspan > MAX_FEC_SPAN)
01265             udptlfecspan = MAX_FEC_SPAN;
01266       }
01267       ast_config_destroy(cfg);
01268    }
01269    if (udptlstart >= udptlend) {
01270       ast_log(LOG_WARNING, "Unreasonable values for UDPTL start/end\n");
01271       udptlstart = 4500;
01272       udptlend = 4999;
01273    }
01274    if (option_verbose > 1)
01275       ast_verbose(VERBOSE_PREFIX_2 "UDPTL allocating from port range %d -> %d\n", udptlstart, udptlend);
01276 }

void ast_udptl_reset ( struct ast_udptl udptl  ) 

void ast_udptl_set_callback ( struct ast_udptl udptl,
ast_udptl_callback  callback 
)

Definition at line 631 of file udptl.c.

References ast_udptl::callback.

00632 {
00633    udptl->callback = callback;
00634 }

void ast_udptl_set_data ( struct ast_udptl udptl,
void *  data 
)

Definition at line 626 of file udptl.c.

References ast_udptl::data.

00627 {
00628    udptl->data = data;
00629 }

void ast_udptl_set_error_correction_scheme ( struct ast_udptl udptl,
int  ec 
)

Definition at line 723 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().

00724 {
00725    if (udptl) {
00726       switch (ec) {
00727       case UDPTL_ERROR_CORRECTION_FEC:
00728          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00729          break;
00730       case UDPTL_ERROR_CORRECTION_REDUNDANCY:
00731          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00732          break;
00733       case UDPTL_ERROR_CORRECTION_NONE:
00734          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00735          break;
00736       default:
00737          ast_log(LOG_WARNING, "error correction parameter invalid\n");
00738       };
00739    } else
00740       ast_log(LOG_WARNING, "udptl structure is null\n");
00741 }

void ast_udptl_set_far_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 771 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().

00772 {
00773    if (udptl)
00774       udptl->far_max_datagram_size = max_datagram;
00775    else
00776       ast_log(LOG_WARNING, "udptl structure is null\n");
00777 }

void ast_udptl_set_local_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 763 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().

00764 {
00765    if (udptl)
00766       udptl->local_max_datagram_size = max_datagram;
00767    else
00768       ast_log(LOG_WARNING, "udptl structure is null\n");
00769 }

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 871 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp().

00872 {
00873    udptl->them.sin_port = them->sin_port;
00874    udptl->them.sin_addr = them->sin_addr;
00875 }

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 636 of file udptl.c.

References ast_udptl::nat.

Referenced by do_setnat().

00637 {
00638    udptl->nat = nat;
00639 }

int ast_udptl_settos ( struct ast_udptl udptl,
int  tos 
)

Definition at line 862 of file udptl.c.

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

Referenced by sip_alloc().

00863 {
00864    int res;
00865 
00866    if ((res = setsockopt(udptl->fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)))) 
00867       ast_log(LOG_WARNING, "UDPTL unable to set TOS to %d\n", tos);
00868    return res;
00869 }

void ast_udptl_stop ( struct ast_udptl udptl  ) 

Definition at line 890 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp(), and stop_media_flows().

00891 {
00892    memset(&udptl->them.sin_addr, 0, sizeof(udptl->them.sin_addr));
00893    memset(&udptl->them.sin_port, 0, sizeof(udptl->them.sin_port));
00894 }

int ast_udptl_write ( struct ast_udptl udptl,
struct ast_frame f 
)

Definition at line 905 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().

00906 {
00907    int seq;
00908    int len;
00909    int res;
00910    uint8_t buf[LOCAL_FAX_MAX_DATAGRAM];
00911 
00912    /* If we have no peer, return immediately */ 
00913    if (s->them.sin_addr.s_addr == INADDR_ANY)
00914       return 0;
00915 
00916    /* If there is no data length, return immediately */
00917    if (f->datalen == 0)
00918       return 0;
00919    
00920    if (f->frametype != AST_FRAME_MODEM) {
00921       ast_log(LOG_WARNING, "UDPTL can only send T.38 data\n");
00922       return -1;
00923    }
00924 
00925    /* Save seq_no for debug output because udptl_build_packet increments it */
00926    seq = s->tx_seq_no & 0xFFFF;
00927 
00928    /* Cook up the UDPTL packet, with the relevant EC info. */
00929    len = udptl_build_packet(s, buf, f->data, f->datalen);
00930 
00931    if (len > 0 && s->them.sin_port && s->them.sin_addr.s_addr) {
00932       if ((res = sendto(s->fd, buf, len, 0, (struct sockaddr *) &s->them, sizeof(s->them))) < 0)
00933          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));
00934 #if 0
00935       printf("Sent %d bytes of UDPTL data to %s:%d\n", res, ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00936 #endif
00937       if (udptl_debug_test_addr(&s->them))
00938          ast_verbose("Sent UDPTL packet to %s:%d (type %d, seq %d, len %d)\n",
00939                ast_inet_ntoa(s->them.sin_addr),
00940                ntohs(s->them.sin_port), 0, seq, len);
00941    }
00942       
00943    return 0;
00944 }


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