Thu Feb 5 16:26:25 2009

Asterisk developer's documentation


udptl.h File Reference

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

Go to the source code of this file.

Data Structures

struct  ast_udptl_protocol

Typedefs

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

Enumerations

enum  { UDPTL_ERROR_CORRECTION_NONE, UDPTL_ERROR_CORRECTION_FEC, UDPTL_ERROR_CORRECTION_REDUNDANCY }

Functions

int ast_udptl_bridge (struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc)
void ast_udptl_destroy (struct ast_udptl *udptl)
int ast_udptl_fd (struct ast_udptl *udptl)
void ast_udptl_get_current_formats (struct ast_udptl *udptl, int *astFormats, int *nonAstFormats)
int ast_udptl_get_error_correction_scheme (struct ast_udptl *udptl)
int ast_udptl_get_far_max_datagram (struct ast_udptl *udptl)
int ast_udptl_get_local_max_datagram (struct ast_udptl *udptl)
void ast_udptl_get_peer (struct ast_udptl *udptl, struct sockaddr_in *them)
void ast_udptl_get_us (struct ast_udptl *udptl, struct sockaddr_in *us)
void ast_udptl_init (void)
int ast_udptl_lookup_code (struct ast_udptl *udptl, int isAstFormat, int code)
ast_udptlast_udptl_new (struct sched_context *sched, struct io_context *io, int callbackmode)
ast_udptlast_udptl_new_with_bindaddr (struct sched_context *sched, struct io_context *io, int callbackmode, struct in_addr in)
void ast_udptl_offered_from_local (struct ast_udptl *udptl, int local)
int ast_udptl_proto_register (struct ast_udptl_protocol *proto)
void ast_udptl_proto_unregister (struct ast_udptl_protocol *proto)
ast_frameast_udptl_read (struct ast_udptl *udptl)
void ast_udptl_reload (void)
void ast_udptl_reset (struct ast_udptl *udptl)
void ast_udptl_set_callback (struct ast_udptl *udptl, ast_udptl_callback callback)
void ast_udptl_set_data (struct ast_udptl *udptl, void *data)
void ast_udptl_set_error_correction_scheme (struct ast_udptl *udptl, int ec)
void ast_udptl_set_far_max_datagram (struct ast_udptl *udptl, int max_datagram)
void ast_udptl_set_local_max_datagram (struct ast_udptl *udptl, int max_datagram)
void ast_udptl_set_m_type (struct ast_udptl *udptl, int pt)
void ast_udptl_set_peer (struct ast_udptl *udptl, struct sockaddr_in *them)
void ast_udptl_set_udptlmap_type (struct ast_udptl *udptl, int pt, char *mimeType, char *mimeSubtype)
void ast_udptl_setnat (struct ast_udptl *udptl, int nat)
int ast_udptl_settos (struct ast_udptl *udptl, int tos)
void ast_udptl_stop (struct ast_udptl *udptl)
int ast_udptl_write (struct ast_udptl *udptl, struct ast_frame *f)


Typedef Documentation

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

Definition at line 50 of file udptl.h.


Enumeration Type Documentation

anonymous enum

Enumerator:
UDPTL_ERROR_CORRECTION_NONE 
UDPTL_ERROR_CORRECTION_FEC 
UDPTL_ERROR_CORRECTION_REDUNDANCY 

Definition at line 28 of file udptl.h.


Function Documentation

int ast_udptl_bridge ( struct ast_channel c0,
struct ast_channel c1,
int  flags,
struct ast_frame **  fo,
struct ast_channel **  rc 
)

Definition at line 961 of file udptl.c.

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

00962 {
00963    struct ast_frame *f;
00964    struct ast_channel *who;
00965    struct ast_channel *cs[3];
00966    struct ast_udptl *p0;
00967    struct ast_udptl *p1;
00968    struct ast_udptl_protocol *pr0;
00969    struct ast_udptl_protocol *pr1;
00970    struct sockaddr_in ac0;
00971    struct sockaddr_in ac1;
00972    struct sockaddr_in t0;
00973    struct sockaddr_in t1;
00974    void *pvt0;
00975    void *pvt1;
00976    int to;
00977    
00978    ast_channel_lock(c0);
00979    while (ast_channel_trylock(c1)) {
00980       ast_channel_unlock(c0);
00981       usleep(1);
00982       ast_channel_lock(c0);
00983    }
00984    pr0 = get_proto(c0);
00985    pr1 = get_proto(c1);
00986    if (!pr0) {
00987       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c0->name);
00988       ast_channel_unlock(c0);
00989       ast_channel_unlock(c1);
00990       return -1;
00991    }
00992    if (!pr1) {
00993       ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", c1->name);
00994       ast_channel_unlock(c0);
00995       ast_channel_unlock(c1);
00996       return -1;
00997    }
00998    pvt0 = c0->tech_pvt;
00999    pvt1 = c1->tech_pvt;
01000    p0 = pr0->get_udptl_info(c0);
01001    p1 = pr1->get_udptl_info(c1);
01002    if (!p0 || !p1) {
01003       /* Somebody doesn't want to play... */
01004       ast_channel_unlock(c0);
01005       ast_channel_unlock(c1);
01006       return -2;
01007    }
01008    if (pr0->set_udptl_peer(c0, p1)) {
01009       ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", c0->name, c1->name);
01010       memset(&ac1, 0, sizeof(ac1));
01011    } else {
01012       /* Store UDPTL peer */
01013       ast_udptl_get_peer(p1, &ac1);
01014    }
01015    if (pr1->set_udptl_peer(c1, p0)) {
01016       ast_log(LOG_WARNING, "Channel '%s' failed to talk back to '%s'\n", c1->name, c0->name);
01017       memset(&ac0, 0, sizeof(ac0));
01018    } else {
01019       /* Store UDPTL peer */
01020       ast_udptl_get_peer(p0, &ac0);
01021    }
01022    ast_channel_unlock(c0);
01023    ast_channel_unlock(c1);
01024    cs[0] = c0;
01025    cs[1] = c1;
01026    cs[2] = NULL;
01027    for (;;) {
01028       if ((c0->tech_pvt != pvt0) ||
01029          (c1->tech_pvt != pvt1) ||
01030          (c0->masq || c0->masqr || c1->masq || c1->masqr)) {
01031             ast_log(LOG_DEBUG, "Oooh, something is weird, backing out\n");
01032             /* Tell it to try again later */
01033             return -3;
01034       }
01035       to = -1;
01036       ast_udptl_get_peer(p1, &t1);
01037       ast_udptl_get_peer(p0, &t0);
01038       if (inaddrcmp(&t1, &ac1)) {
01039          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01040             c1->name, ast_inet_ntoa(t1.sin_addr), ntohs(t1.sin_port));
01041          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01042             c1->name, ast_inet_ntoa(ac1.sin_addr), ntohs(ac1.sin_port));
01043          memcpy(&ac1, &t1, sizeof(ac1));
01044       }
01045       if (inaddrcmp(&t0, &ac0)) {
01046          ast_log(LOG_DEBUG, "Oooh, '%s' changed end address to %s:%d\n", 
01047             c0->name, ast_inet_ntoa(t0.sin_addr), ntohs(t0.sin_port));
01048          ast_log(LOG_DEBUG, "Oooh, '%s' was %s:%d\n", 
01049             c0->name, ast_inet_ntoa(ac0.sin_addr), ntohs(ac0.sin_port));
01050          memcpy(&ac0, &t0, sizeof(ac0));
01051       }
01052       who = ast_waitfor_n(cs, 2, &to);
01053       if (!who) {
01054          ast_log(LOG_DEBUG, "Ooh, empty read...\n");
01055          /* check for hangup / whentohangup */
01056          if (ast_check_hangup(c0) || ast_check_hangup(c1))
01057             break;
01058          continue;
01059       }
01060       f = ast_read(who);
01061       if (!f) {
01062          *fo = f;
01063          *rc = who;
01064          ast_log(LOG_DEBUG, "Oooh, got a %s\n", f ? "digit" : "hangup");
01065          /* That's all we needed */
01066          return 0;
01067       } else {
01068          if (f->frametype == AST_FRAME_MODEM) {
01069             /* Forward T.38 frames if they happen upon us */
01070             if (who == c0) {
01071                ast_write(c1, f);
01072             } else if (who == c1) {
01073                ast_write(c0, f);
01074             }
01075          }
01076          ast_frfree(f);
01077       }
01078       /* Swap priority. Not that it's a big deal at this point */
01079       cs[2] = cs[0];
01080       cs[0] = cs[1];
01081       cs[1] = cs[2];
01082    }
01083    return -1;
01084 }

void ast_udptl_destroy ( struct ast_udptl udptl  ) 

Definition at line 861 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().

00862 {
00863    if (udptl->ioid)
00864       ast_io_remove(udptl->io, udptl->ioid);
00865    if (udptl->fd > -1)
00866       close(udptl->fd);
00867    free(udptl);
00868 }

int ast_udptl_fd ( struct ast_udptl udptl  ) 

Definition at line 587 of file udptl.c.

References ast_udptl::fd.

Referenced by __oh323_new(), and sip_new().

00588 {
00589    return udptl->fd;
00590 }

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 678 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().

00679 {
00680    if (udptl)
00681       return udptl->error_correction_scheme;
00682    else {
00683       ast_log(LOG_WARNING, "udptl structure is null\n");
00684       return -1;
00685    }
00686 }

int ast_udptl_get_far_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 718 of file udptl.c.

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

00719 {
00720    if (udptl)
00721       return udptl->far_max_datagram_size;
00722    else {
00723       ast_log(LOG_WARNING, "udptl structure is null\n");
00724       return -1;
00725    }
00726 }

int ast_udptl_get_local_max_datagram ( struct ast_udptl udptl  ) 

Definition at line 708 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().

00709 {
00710    if (udptl)
00711       return udptl->local_max_datagram_size;
00712    else {
00713       ast_log(LOG_WARNING, "udptl structure is null\n");
00714       return -1;
00715    }
00716 }

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

Definition at line 842 of file udptl.c.

References ast_udptl::them.

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

00843 {
00844    memset(them, 0, sizeof(*them));
00845    them->sin_family = AF_INET;
00846    them->sin_port = udptl->them.sin_port;
00847    them->sin_addr = udptl->them.sin_addr;
00848 }

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

Definition at line 850 of file udptl.c.

References ast_udptl::us.

Referenced by add_t38_sdp().

00851 {
00852    memcpy(us, &udptl->us, sizeof(udptl->us));
00853 }

void ast_udptl_init ( void   ) 

Definition at line 1243 of file udptl.c.

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

Referenced by main().

01244 {
01245    ast_cli_register_multiple(cli_udptl, sizeof(cli_udptl) / sizeof(struct ast_cli_entry));
01246    ast_udptl_reload();
01247 }

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 820 of file udptl.c.

References ast_udptl_new_with_bindaddr(), io, and sched.

00821 {
00822    struct in_addr ia;
00823    memset(&ia, 0, sizeof(ia));
00824    return ast_udptl_new_with_bindaddr(sched, io, callbackmode, ia);
00825 }

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 744 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().

00745 {
00746    struct ast_udptl *udptl;
00747    int x;
00748    int startplace;
00749    int i;
00750    long int flags;
00751 
00752    if (!(udptl = ast_calloc(1, sizeof(*udptl))))
00753       return NULL;
00754 
00755    if (udptlfectype == 2)
00756       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00757    else if (udptlfectype == 1)
00758       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00759    else
00760       udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00761    udptl->error_correction_span = udptlfecspan;
00762    udptl->error_correction_entries = udptlfecentries;
00763    
00764    udptl->far_max_datagram_size = udptlmaxdatagram;
00765    udptl->local_max_datagram_size = udptlmaxdatagram;
00766 
00767    memset(&udptl->rx, 0, sizeof(udptl->rx));
00768    memset(&udptl->tx, 0, sizeof(udptl->tx));
00769    for (i = 0; i <= UDPTL_BUF_MASK; i++) {
00770       udptl->rx[i].buf_len = -1;
00771       udptl->tx[i].buf_len = -1;
00772    }
00773 
00774    udptl->them.sin_family = AF_INET;
00775    udptl->us.sin_family = AF_INET;
00776 
00777    if ((udptl->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
00778       free(udptl);
00779       ast_log(LOG_WARNING, "Unable to allocate socket: %s\n", strerror(errno));
00780       return NULL;
00781    }
00782    flags = fcntl(udptl->fd, F_GETFL);
00783    fcntl(udptl->fd, F_SETFL, flags | O_NONBLOCK);
00784 #ifdef SO_NO_CHECK
00785    if (nochecksums)
00786       setsockopt(udptl->fd, SOL_SOCKET, SO_NO_CHECK, &nochecksums, sizeof(nochecksums));
00787 #endif
00788    /* Find us a place */
00789    x = (ast_random() % (udptlend - udptlstart)) + udptlstart;
00790    startplace = x;
00791    for (;;) {
00792       udptl->us.sin_port = htons(x);
00793       udptl->us.sin_addr = addr;
00794       if (bind(udptl->fd, (struct sockaddr *) &udptl->us, sizeof(udptl->us)) == 0)
00795          break;
00796       if (errno != EADDRINUSE) {
00797          ast_log(LOG_WARNING, "Unexpected bind error: %s\n", strerror(errno));
00798          close(udptl->fd);
00799          free(udptl);
00800          return NULL;
00801       }
00802       if (++x > udptlend)
00803          x = udptlstart;
00804       if (x == startplace) {
00805          ast_log(LOG_WARNING, "No UDPTL ports remaining\n");
00806          close(udptl->fd);
00807          free(udptl);
00808          return NULL;
00809       }
00810    }
00811    if (io && sched && callbackmode) {
00812       /* Operate this one in a callback mode */
00813       udptl->sched = sched;
00814       udptl->io = io;
00815       udptl->ioid = ast_io_add(udptl->io, udptl->fd, udptlread, AST_IO_IN, udptl);
00816    }
00817    return udptl;
00818 }

void ast_udptl_offered_from_local ( struct ast_udptl udptl,
int  local 
)

Definition at line 670 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().

00671 {
00672    if (udptl)
00673       udptl->udptl_offered_from_local = local;
00674    else
00675       ast_log(LOG_WARNING, "udptl structure is null\n");
00676 }

int ast_udptl_proto_register ( struct ast_udptl_protocol proto  ) 

Definition at line 931 of file udptl.c.

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

Referenced by load_module().

00932 {
00933    struct ast_udptl_protocol *cur;
00934 
00935    cur = protos;
00936    while (cur) {
00937       if (cur->type == proto->type) {
00938          ast_log(LOG_WARNING, "Tried to register same protocol '%s' twice\n", cur->type);
00939          return -1;
00940       }
00941       cur = cur->next;
00942    }
00943    proto->next = protos;
00944    protos = proto;
00945    return 0;
00946 }

void ast_udptl_proto_unregister ( struct ast_udptl_protocol proto  ) 

Definition at line 911 of file udptl.c.

References ast_udptl_protocol::next, and protos.

Referenced by unload_module().

00912 {
00913    struct ast_udptl_protocol *cur;
00914    struct ast_udptl_protocol *prev;
00915 
00916    cur = protos;
00917    prev = NULL;
00918    while (cur) {
00919       if (cur == proto) {
00920          if (prev)
00921             prev->next = proto->next;
00922          else
00923             protos = proto->next;
00924          return;
00925       }
00926       prev = cur;
00927       cur = cur->next;
00928    }
00929 }

struct ast_frame* ast_udptl_read ( struct ast_udptl udptl  ) 

Definition at line 619 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().

00620 {
00621    int res;
00622    struct sockaddr_in sin;
00623    socklen_t len;
00624    uint16_t seqno = 0;
00625    uint16_t *udptlheader;
00626 
00627    len = sizeof(sin);
00628    
00629    /* Cache where the header will go */
00630    res = recvfrom(udptl->fd,
00631          udptl->rawdata + AST_FRIENDLY_OFFSET,
00632          sizeof(udptl->rawdata) - AST_FRIENDLY_OFFSET,
00633          0,
00634          (struct sockaddr *) &sin,
00635          &len);
00636    udptlheader = (uint16_t *)(udptl->rawdata + AST_FRIENDLY_OFFSET);
00637    if (res < 0) {
00638       if (errno != EAGAIN)
00639          ast_log(LOG_WARNING, "UDPTL read error: %s\n", strerror(errno));
00640       ast_assert(errno != EBADF);
00641       return &ast_null_frame;
00642    }
00643 
00644    /* Ignore if the other side hasn't been given an address yet. */
00645    if (!udptl->them.sin_addr.s_addr || !udptl->them.sin_port)
00646       return &ast_null_frame;
00647 
00648    if (udptl->nat) {
00649       /* Send to whoever sent to us */
00650       if ((udptl->them.sin_addr.s_addr != sin.sin_addr.s_addr) ||
00651          (udptl->them.sin_port != sin.sin_port)) {
00652          memcpy(&udptl->them, &sin, sizeof(udptl->them));
00653          ast_log(LOG_DEBUG, "UDPTL NAT: Using address %s:%d\n", ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00654       }
00655    }
00656 
00657    if (udptl_debug_test_addr(&sin)) {
00658       ast_verbose("Got UDPTL packet from %s:%d (type %d, seq %d, len %d)\n",
00659          ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), 0, seqno, res);
00660    }
00661 #if 0
00662    printf("Got UDPTL packet from %s:%d (seq %d, len = %d)\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), seqno, res);
00663 #endif
00664    if (udptl_rx_packet(udptl, udptl->rawdata + AST_FRIENDLY_OFFSET, res) < 1)
00665       return &ast_null_frame;
00666 
00667    return &udptl->f[0];
00668 }

void ast_udptl_reload ( void   ) 

Definition at line 1167 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().

01168 {
01169    struct ast_config *cfg;
01170    const char *s;
01171 
01172    udptlstart = 4500;
01173    udptlend = 4999;
01174    udptlfectype = 0;
01175    udptlfecentries = 0;
01176    udptlfecspan = 0;
01177    udptlmaxdatagram = 0;
01178 
01179    if ((cfg = ast_config_load("udptl.conf"))) {
01180       if ((s = ast_variable_retrieve(cfg, "general", "udptlstart"))) {
01181          udptlstart = atoi(s);
01182          if (udptlstart < 1024)
01183             udptlstart = 1024;
01184          if (udptlstart > 65535)
01185             udptlstart = 65535;
01186       }
01187       if ((s = ast_variable_retrieve(cfg, "general", "udptlend"))) {
01188          udptlend = atoi(s);
01189          if (udptlend < 1024)
01190             udptlend = 1024;
01191          if (udptlend > 65535)
01192             udptlend = 65535;
01193       }
01194       if ((s = ast_variable_retrieve(cfg, "general", "udptlchecksums"))) {
01195 #ifdef SO_NO_CHECK
01196          if (ast_false(s))
01197             nochecksums = 1;
01198          else
01199             nochecksums = 0;
01200 #else
01201          if (ast_false(s))
01202             ast_log(LOG_WARNING, "Disabling UDPTL checksums is not supported on this operating system!\n");
01203 #endif
01204       }
01205       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxUdpEC"))) {
01206          if (strcmp(s, "t38UDPFEC") == 0)
01207             udptlfectype = 2;
01208          else if (strcmp(s, "t38UDPRedundancy") == 0)
01209             udptlfectype = 1;
01210       }
01211       if ((s = ast_variable_retrieve(cfg, "general", "T38FaxMaxDatagram"))) {
01212          udptlmaxdatagram = atoi(s);
01213          if (udptlmaxdatagram < 0)
01214             udptlmaxdatagram = 0;
01215          if (udptlmaxdatagram > LOCAL_FAX_MAX_DATAGRAM)
01216             udptlmaxdatagram = LOCAL_FAX_MAX_DATAGRAM;
01217       }
01218       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECentries"))) {
01219          udptlfecentries = atoi(s);
01220          if (udptlfecentries < 0)
01221             udptlfecentries = 0;
01222          if (udptlfecentries > MAX_FEC_ENTRIES)
01223             udptlfecentries = MAX_FEC_ENTRIES;
01224       }
01225       if ((s = ast_variable_retrieve(cfg, "general", "UDPTLFECspan"))) {
01226          udptlfecspan = atoi(s);
01227          if (udptlfecspan < 0)
01228             udptlfecspan = 0;
01229          if (udptlfecspan > MAX_FEC_SPAN)
01230             udptlfecspan = MAX_FEC_SPAN;
01231       }
01232       ast_config_destroy(cfg);
01233    }
01234    if (udptlstart >= udptlend) {
01235       ast_log(LOG_WARNING, "Unreasonable values for UDPTL start/end\n");
01236       udptlstart = 4500;
01237       udptlend = 4999;
01238    }
01239    if (option_verbose > 1)
01240       ast_verbose(VERBOSE_PREFIX_2 "UDPTL allocating from port range %d -> %d\n", udptlstart, udptlend);
01241 }

void ast_udptl_reset ( struct ast_udptl udptl  ) 

void ast_udptl_set_callback ( struct ast_udptl udptl,
ast_udptl_callback  callback 
)

Definition at line 597 of file udptl.c.

References ast_udptl::callback.

00598 {
00599    udptl->callback = callback;
00600 }

void ast_udptl_set_data ( struct ast_udptl udptl,
void *  data 
)

Definition at line 592 of file udptl.c.

References ast_udptl::data.

00593 {
00594    udptl->data = data;
00595 }

void ast_udptl_set_error_correction_scheme ( struct ast_udptl udptl,
int  ec 
)

Definition at line 688 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().

00689 {
00690    if (udptl) {
00691       switch (ec) {
00692       case UDPTL_ERROR_CORRECTION_FEC:
00693          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_FEC;
00694          break;
00695       case UDPTL_ERROR_CORRECTION_REDUNDANCY:
00696          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_REDUNDANCY;
00697          break;
00698       case UDPTL_ERROR_CORRECTION_NONE:
00699          udptl->error_correction_scheme = UDPTL_ERROR_CORRECTION_NONE;
00700          break;
00701       default:
00702          ast_log(LOG_WARNING, "error correction parameter invalid\n");
00703       };
00704    } else
00705       ast_log(LOG_WARNING, "udptl structure is null\n");
00706 }

void ast_udptl_set_far_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 736 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().

00737 {
00738    if (udptl)
00739       udptl->far_max_datagram_size = max_datagram;
00740    else
00741       ast_log(LOG_WARNING, "udptl structure is null\n");
00742 }

void ast_udptl_set_local_max_datagram ( struct ast_udptl udptl,
int  max_datagram 
)

Definition at line 728 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().

00729 {
00730    if (udptl)
00731       udptl->local_max_datagram_size = max_datagram;
00732    else
00733       ast_log(LOG_WARNING, "udptl structure is null\n");
00734 }

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 836 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp().

00837 {
00838    udptl->them.sin_port = them->sin_port;
00839    udptl->them.sin_addr = them->sin_addr;
00840 }

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 602 of file udptl.c.

References ast_udptl::nat.

Referenced by do_setnat().

00603 {
00604    udptl->nat = nat;
00605 }

int ast_udptl_settos ( struct ast_udptl udptl,
int  tos 
)

Definition at line 827 of file udptl.c.

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

Referenced by sip_alloc().

00828 {
00829    int res;
00830 
00831    if ((res = setsockopt(udptl->fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)))) 
00832       ast_log(LOG_WARNING, "UDPTL unable to set TOS to %d\n", tos);
00833    return res;
00834 }

void ast_udptl_stop ( struct ast_udptl udptl  ) 

Definition at line 855 of file udptl.c.

References ast_udptl::them.

Referenced by process_sdp(), and stop_media_flows().

00856 {
00857    memset(&udptl->them.sin_addr, 0, sizeof(udptl->them.sin_addr));
00858    memset(&udptl->them.sin_port, 0, sizeof(udptl->them.sin_port));
00859 }

int ast_udptl_write ( struct ast_udptl udptl,
struct ast_frame f 
)

Definition at line 870 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().

00871 {
00872    int seq;
00873    int len;
00874    int res;
00875    uint8_t buf[LOCAL_FAX_MAX_DATAGRAM];
00876 
00877    /* If we have no peer, return immediately */ 
00878    if (s->them.sin_addr.s_addr == INADDR_ANY)
00879       return 0;
00880 
00881    /* If there is no data length, return immediately */
00882    if (f->datalen == 0)
00883       return 0;
00884    
00885    if (f->frametype != AST_FRAME_MODEM) {
00886       ast_log(LOG_WARNING, "UDPTL can only send T.38 data\n");
00887       return -1;
00888    }
00889 
00890    /* Save seq_no for debug output because udptl_build_packet increments it */
00891    seq = s->tx_seq_no & 0xFFFF;
00892 
00893    /* Cook up the UDPTL packet, with the relevant EC info. */
00894    len = udptl_build_packet(s, buf, f->data, f->datalen);
00895 
00896    if (len > 0 && s->them.sin_port && s->them.sin_addr.s_addr) {
00897       if ((res = sendto(s->fd, buf, len, 0, (struct sockaddr *) &s->them, sizeof(s->them))) < 0)
00898          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));
00899 #if 0
00900       printf("Sent %d bytes of UDPTL data to %s:%d\n", res, ast_inet_ntoa(udptl->them.sin_addr), ntohs(udptl->them.sin_port));
00901 #endif
00902       if (udptl_debug_test_addr(&s->them))
00903          ast_verbose("Sent UDPTL packet to %s:%d (type %d, seq %d, len %d)\n",
00904                ast_inet_ntoa(s->them.sin_addr),
00905                ntohs(s->them.sin_port), 0, seq, len);
00906    }
00907       
00908    return 0;
00909 }


Generated on Thu Feb 5 16:26:25 2009 for Asterisk - the Open Source PBX by  doxygen 1.4.7