Mon Jul 14 17:25:25 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 963 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.

00964 {
00965    struct ast_frame *f;
00966    struct ast_channel *who;
00967    struct ast_channel *cs[3];
00968    struct ast_udptl *p0;
00969    struct ast_udptl *p1;
00970    struct ast_udptl_protocol *pr0;
00971    struct ast_udptl_protocol *pr1;
00972    struct sockaddr_in ac0;
00973    struct sockaddr_in ac1;
00974    struct sockaddr_in t0;
00975    struct sockaddr_in t1;
00976    void *pvt0;
00977    void *pvt1;
00978    int to;
00979    
00980    ast_channel_lock(c0);
00981    while (ast_channel_trylock(c1)) {
00982       ast_channel_unlock(c0);
00983       usleep(1);
00984       ast_channel_lock(c0);
00985    }
00986    pr0 = get_proto(c0);
00987    pr1 = get_proto(c1);
00988    if (!pr0) {
00989       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c0->name);
00990       ast_channel_unlock(c0);
00991       ast_channel_unlock(c1);
00992       return -1;
00993    }
00994    if (!pr1) {
00995       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c1->name);
00996       ast_channel_unlock(c0);
00997       ast_channel_unlock(c1);
00998       return -1;
00999    }
01000    pvt0 = c0->tech_pvt;
01001    pvt1 = c1->tech_pvt;
01002    p0 = pr0->get_udptl_info(c0);
01003    p1 = pr1->get_udptl_info(c1);
01004    if (!p0 || !p1) {
01005       /* Somebody doesn't want to play... */
01006       ast_channel_unlock(c0);
01007       ast_channel_unlock(c1);
01008       return -2;
01009    }
01010    if (pr0->set_udptl_peer(c0, p1)) {
01011       ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", c0->name, c1->name);
01012       memset(&ac1, 0, sizeof(ac1));
01013    } else {
01014       /* Store UDPTL peer */
01015       ast_udptl_get_peer(p1, &ac1);
01016    }
01017    if (pr1->set_udptl_peer(c1, p0)) {
01018       ast_log(LOG_WARNING, "Channel '%s' failed to talk back to '%s'\n", c1->name, c0->name);
01019       memset(&ac0, 0, sizeof(ac0));
01020    } else {
01021       /* Store UDPTL peer */
01022       ast_udptl_get_peer(p0, &ac0);
01023    }
01024    ast_channel_unlock(c0);
01025    ast_channel_unlock(c1);
01026    cs[0] = c0;
01027    cs[1] = c1;
01028    cs[2] = NULL;
01029    for (;;) {
01030       if ((c0->tech_pvt != pvt0) ||
01031          (c1->tech_pvt != pvt1) ||
01032          (c0->masq || c0->masqr || c1->masq || c1->masqr)) {
01033             ast_log(LOG_DEBUG, "Oooh, something is weird, backing out\n");
01034             /* Tell it to try again later */
01035             return -3;
01036       }
01037       to = -1;
01038       ast_udptl_get_peer(p1, &t1);
01039       ast_udptl_get_peer(p0, &t0);
01040       if (inaddrcmp(&t1, &ac1)) {
01041          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01042             c1->name, ast_inet_ntoa(t1.sin_addr), ntohs(t1.sin_port));
01043          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01044             c1->name, ast_inet_ntoa(ac1.sin_addr), ntohs(ac1.sin_port));
01045          memcpy(&ac1, &t1, sizeof(ac1));
01046       }
01047       if (inaddrcmp(&t0, &ac0)) {
01048          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01049             c0->name, ast_inet_ntoa(t0.sin_addr), ntohs(t0.sin_port));
01050          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01051             c0->name, ast_inet_ntoa(ac0.sin_addr), ntohs(ac0.sin_port));
01052          memcpy(&ac0, &t0, sizeof(ac0));
01053       }
01054       who = ast_waitfor_n(cs, 2, &to);
01055       if (!who) {
01056          ast_log(LOG_DEBUG, "Ooh, empty read...\n");
01057          /* check for hangup / whentohangup */
01058          if (ast_check_hangup(c0) || ast_check_hangup(c1))
01059             break;
01060          continue;
01061       }
01062       f = ast_read(who);
01063       if (!f) {
01064          *fo = f;
01065          *rc = who;
01066          ast_log(LOG_DEBUG, "Oooh, got a %s\n", f ? "digit" : "hangup");
01067          /* That's all we needed */
01068          return 0;
01069       } else {
01070          if (f->frametype == AST_FRAME_MODEM) {
01071             /* Forward T.38 frames if they happen upon us */
01072             if (who == c0) {
01073                ast_write(c1, f);
01074             } else if (who == c1) {
01075                ast_write(c0, f);
01076             }
01077          }
01078          ast_frfree(f);
01079       }
01080       /* Swap priority. Not that it's a big deal at this point */
01081       cs[2] = cs[0];
01082       cs[0] = cs[1];
01083       cs[1] = cs[2];
01084    }
01085    return -1;
01086 }

void ast_udptl_destroy ( struct ast_udptl udptl  ) 

Definition at line 863 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().

00864 {
00865    if (udptl->ioid)
00866       ast_io_remove(udptl->io, udptl->ioid);
00867    if (udptl->fd > -1)
00868       close(udptl->fd);
00869    free(udptl);
00870 }

int ast_udptl_fd ( struct ast_udptl udptl  ) 

Definition at line 589 of file udptl.c.

References ast_udptl::fd.

Referenced by __oh323_new(), and sip_new().

00590 {
00591    return udptl->fd;
00592 }

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 680 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().

00681 {
00682    if (udptl)
00683       return udptl->error_correction_scheme;
00684    else {
00685       ast_log(LOG_WARNING, "udptl structure is null\n");
00686       return -1;
00687    }
00688 }

int ast_udptl_get_far_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 720 of file udptl.c.

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

00721 {
00722    if (udptl)
00723       return udptl->far_max_datagram_size;
00724    else {
00725       ast_log(LOG_WARNING, "udptl structure is null\n");
00726       return -1;
00727    }
00728 }

int ast_udptl_get_local_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 710 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().

00711 {
00712    if (udptl)
00713       return udptl->local_max_datagram_size;
00714    else {
00715       ast_log(LOG_WARNING, "udptl structure is null\n");
00716       return -1;
00717    }
00718 }

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

Definition at line 844 of file udptl.c.

References ast_udptl::them.

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

00845 {
00846    memset(them, 0, sizeof(*them));
00847    them->sin_family = AF_INET;
00848    them->sin_port = udptl->them.sin_port;
00849    them->sin_addr = udptl->them.sin_addr;
00850 }

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

Definition at line 852 of file udptl.c.

References ast_udptl::us.

Referenced by add_t38_sdp().

00853 {
00854    memcpy(us, &udptl->us, sizeof(udptl->us));
00855 }

void ast_udptl_init ( void   ) 

Definition at line 1245 of file udptl.c.

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

Referenced by main().

01246 {
01247    ast_cli_register_multiple(cli_udptl, sizeof(cli_udptl) / sizeof(struct ast_cli_entry));
01248    ast_udptl_reload();
01249 }

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 822 of file udptl.c.

References ast_udptl_new_with_bindaddr(), io, and sched.

00823 {
00824    struct in_addr ia;
00825    memset(&ia, 0, sizeof(ia));
00826    return ast_udptl_new_with_bindaddr(sched, io, callbackmode, ia);
00827 }

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 746 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().

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

void ast_udptl_offered_from_local ( struct ast_udptl udptl,
int  local 
)

Definition at line 672 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().

00673 {
00674    if (udptl)
00675       udptl->udptl_offered_from_local = local;
00676    else
00677       ast_log(LOG_WARNING, "udptl structure is null\n");
00678 }

int ast_udptl_proto_register ( struct ast_udptl_protocol proto  ) 

Definition at line 933 of file udptl.c.

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

Referenced by load_module().

00934 {
00935    struct ast_udptl_protocol *cur;
00936 
00937    cur = protos;
00938    while (cur) {
00939       if (cur->type == proto->type) {
00940          ast_log(LOG_WARNING, "Tried to register same protocol '%s' twice\n", cur->type);
00941          return -1;
00942       }
00943       cur = cur->next;
00944    }
00945    proto->next = protos;
00946    protos = proto;
00947    return 0;
00948 }

void ast_udptl_proto_unregister ( struct ast_udptl_protocol proto  ) 

Definition at line 913 of file udptl.c.

References ast_udptl_protocol::next, and protos.

Referenced by unload_module().

00914 {
00915    struct ast_udptl_protocol *cur;
00916    struct ast_udptl_protocol *prev;
00917 
00918    cur = protos;
00919    prev = NULL;
00920    while (cur) {
00921       if (cur == proto) {
00922          if (prev)
00923             prev->next = proto->next;
00924          else
00925             protos = proto->next;
00926          return;
00927       }
00928       prev = cur;
00929       cur = cur->next;
00930    }
00931 }

struct ast_frame* ast_udptl_read ( struct ast_udptl udptl  ) 

Definition at line 621 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().

00622 {
00623    int res;
00624    struct sockaddr_in sin;
00625    socklen_t len;
00626    uint16_t seqno = 0;
00627    uint16_t *udptlheader;
00628 
00629    len = sizeof(sin);
00630    
00631    /* Cache where the header will go */
00632    res = recvfrom(udptl->fd,
00633          udptl->rawdata + AST_FRIENDLY_OFFSET,
00634          sizeof(udptl->rawdata) - AST_FRIENDLY_OFFSET,
00635          0,
00636          (struct sockaddr *) &sin,
00637          &len);
00638    udptlheader = (uint16_t *)(udptl->rawdata + AST_FRIENDLY_OFFSET);
00639    if (res < 0) {
00640       if (errno != EAGAIN)
00641          ast_log(LOG_WARNING, "UDPTL read error: %s\n", strerror(errno));
00642       ast_assert(errno != EBADF);
00643       return &ast_null_frame;
00644    }
00645 
00646    /* Ignore if the other side hasn't been given an address yet. */
00647    if (!udptl->them.sin_addr.s_addr || !udptl->them.sin_port)
00648       return &ast_null_frame;
00649 
00650    if (udptl->nat) {
00651       /* Send to whoever sent to us */
00652       if ((udptl->them.sin_addr.s_addr != sin.sin_addr.s_addr) ||
00653          (udptl->them.sin_port != sin.sin_port)) {
00654          memcpy(&udptl->them, &sin, sizeof(udptl->them));
00655          ast_log(LOG_DEBUG, "UDPTL NAT: Using address %s:%d\n", ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00656       }
00657    }
00658 
00659    if (udptl_debug_test_addr(&sin)) {
00660       ast_verbose("Got UDPTL packet from %s:%d (type %d, seq %d, len %d)\n",
00661          ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), 0, seqno, res);
00662    }
00663 #if 0
00664    printf("Got UDPTL packet from %s:%d (seq %d, len = %d)\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), seqno, res);
00665 #endif
00666    if (udptl_rx_packet(udptl, udptl->rawdata + AST_FRIENDLY_OFFSET, res) < 1)
00667       return &ast_null_frame;
00668 
00669    return &udptl->f[0];
00670 }

void ast_udptl_reload ( void   ) 

Definition at line 1169 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().

01170 {
01171    struct ast_config *cfg;
01172    const char *s;
01173 
01174    udptlstart = 4500;
01175    udptlend = 4999;
01176    udptlfectype = 0;
01177    udptlfecentries = 0;
01178    udptlfecspan = 0;
01179    udptlmaxdatagram = 0;
01180 
01181    if ((cfg = ast_config_load("udptl.conf"))) {
01182       if ((s = ast_variable_retrieve(cfg, "general", "udptlstart"))) {
01183          udptlstart = atoi(s);
01184          if (udptlstart < 1024)
01185             udptlstart = 1024;
01186          if (udptlstart > 65535)
01187             udptlstart = 65535;
01188       }
01189       if ((s = ast_variable_retrieve(cfg, "general", "udptlend"))) {
01190          udptlend = atoi(s);
01191          if (udptlend < 1024)
01192             udptlend = 1024;
01193          if (udptlend > 65535)
01194             udptlend = 65535;
01195       }
01196       if ((s = ast_variable_retrieve(cfg, "general", "udptlchecksums"))) {
01197 #ifdef SO_NO_CHECK
01198          if (ast_false(s))
01199             nochecksums = 1;
01200          else
01201             nochecksums = 0;
01202 #else
01203          if (ast_false(s))
01204             ast_log(LOG_WARNING, "Disabling UDPTL checksums is not supported on this operating system!\n");
01205 #endif
01206       }
01207       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxUdpEC"))) {
01208          if (strcmp(s, "t38UDPFEC") == 0)
01209             udptlfectype = 2;
01210          else if (strcmp(s, "t38UDPRedundancy") == 0)
01211             udptlfectype = 1;
01212       }
01213       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxMaxDatagram"))) {
01214          udptlmaxdatagram = atoi(s);
01215          if (udptlmaxdatagram < 0)
01216             udptlmaxdatagram = 0;
01217          if (udptlmaxdatagram > LOCAL_FAX_MAX_DATAGRAM)
01218             udptlmaxdatagram = LOCAL_FAX_MAX_DATAGRAM;
01219       }
01220       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECentries"))) {
01221          udptlfecentries = atoi(s);
01222          if (udptlfecentries < 0)
01223             udptlfecentries = 0;
01224          if (udptlfecentries > MAX_FEC_ENTRIES)
01225             udptlfecentries = MAX_FEC_ENTRIES;
01226       }
01227       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECspan"))) {
01228          udptlfecspan = atoi(s);
01229          if (udptlfecspan < 0)
01230             udptlfecspan = 0;
01231          if (udptlfecspan > MAX_FEC_SPAN)
01232             udptlfecspan = MAX_FEC_SPAN;
01233       }
01234       ast_config_destroy(cfg);
01235    }
01236    if (udptlstart >= udptlend) {
01237       ast_log(LOG_WARNING, "Unreasonable values for UDPTL start/end\n");
01238       udptlstart = 4500;
01239       udptlend = 4999;
01240    }
01241    if (option_verbose > 1)
01242       ast_verbose(VERBOSE_PREFIX_2 "UDPTL allocating from port range %d -> %d\n", udptlstart, udptlend);
01243 }

void ast_udptl_reset ( struct ast_udptl udptl  ) 

void ast_udptl_set_callback ( struct ast_udptl udptl,
ast_udptl_callback  callback 
)

Definition at line 599 of file udptl.c.

References ast_udptl::callback.

00600 {
00601    udptl->callback = callback;
00602 }

void ast_udptl_set_data ( struct ast_udptl udptl,
void *  data 
)

Definition at line 594 of file udptl.c.

References ast_udptl::data.

00595 {
00596    udptl->data = data;
00597 }

void ast_udptl_set_error_correction_scheme ( struct ast_udptl udptl,
int  ec 
)

Definition at line 690 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().

00691 {
00692    if (udptl) {
00693       switch (ec) {
00694       case UDPTL_ERROR_CORRECTION_FEC:
00695          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00696          break;
00697       case UDPTL_ERROR_CORRECTION_REDUNDANCY:
00698          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00699          break;
00700       case UDPTL_ERROR_CORRECTION_NONE:
00701          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00702          break;
00703       default:
00704          ast_log(LOG_WARNING, "error correction parameter invalid\n");
00705       };
00706    } else
00707       ast_log(LOG_WARNING, "udptl structure is null\n");
00708 }

void ast_udptl_set_far_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 738 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().

00739 {
00740    if (udptl)
00741       udptl->far_max_datagram_size = max_datagram;
00742    else
00743       ast_log(LOG_WARNING, "udptl structure is null\n");
00744 }

void ast_udptl_set_local_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 730 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().

00731 {
00732    if (udptl)
00733       udptl->local_max_datagram_size = max_datagram;
00734    else
00735       ast_log(LOG_WARNING, "udptl structure is null\n");
00736 }

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 838 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp().

00839 {
00840    udptl->them.sin_port = them->sin_port;
00841    udptl->them.sin_addr = them->sin_addr;
00842 }

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 604 of file udptl.c.

References ast_udptl::nat.

Referenced by do_setnat().

00605 {
00606    udptl->nat = nat;
00607 }

int ast_udptl_settos ( struct ast_udptl udptl,
int  tos 
)

Definition at line 829 of file udptl.c.

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

Referenced by sip_alloc().

00830 {
00831    int res;
00832 
00833    if ((res = setsockopt(udptl->fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)))) 
00834       ast_log(LOG_WARNING, "UDPTL unable to set TOS to %d\n", tos);
00835    return res;
00836 }

void ast_udptl_stop ( struct ast_udptl udptl  ) 

Definition at line 857 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp(), and stop_media_flows().

00858 {
00859    memset(&udptl->them.sin_addr, 0, sizeof(udptl->them.sin_addr));
00860    memset(&udptl->them.sin_port, 0, sizeof(udptl->them.sin_port));
00861 }

int ast_udptl_write ( struct ast_udptl udptl,
struct ast_frame f 
)

Definition at line 872 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().

00873 {
00874    int seq;
00875    int len;
00876    int res;
00877    uint8_t buf[LOCAL_FAX_MAX_DATAGRAM];
00878 
00879    /* If we have no peer, return immediately */ 
00880    if (s->them.sin_addr.s_addr == INADDR_ANY)
00881       return 0;
00882 
00883    /* If there is no data length, return immediately */
00884    if (f->datalen == 0)
00885       return 0;
00886    
00887    if (f->frametype != AST_FRAME_MODEM) {
00888       ast_log(LOG_WARNING, "UDPTL can only send T.38 data\n");
00889       return -1;
00890    }
00891 
00892    /* Save seq_no for debug output because udptl_build_packet increments it */
00893    seq = s->tx_seq_no & 0xFFFF;
00894 
00895    /* Cook up the UDPTL packet, with the relevant EC info. */
00896    len = udptl_build_packet(s, buf, f->data, f->datalen);
00897 
00898    if (len > 0 && s->them.sin_port && s->them.sin_addr.s_addr) {
00899       if ((res = sendto(s->fd, buf, len, 0, (struct sockaddr *) &s->them, sizeof(s->them))) < 0)
00900          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));
00901 #if 0
00902       printf("Sent %d bytes of UDPTL data to %s:%d\n", res, ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00903 #endif
00904       if (udptl_debug_test_addr(&s->them))
00905          ast_verbose("Sent UDPTL packet to %s:%d (type %d, seq %d, len %d)\n",
00906                ast_inet_ntoa(s->them.sin_addr),
00907                ntohs(s->them.sin_port), 0, seq, len);
00908    }
00909       
00910    return 0;
00911 }


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