Files
asterisk/channels/iax2/provision.c
Matthew Jordan a2c912e997 media formats: re-architect handling of media for performance improvements
In the old times media formats were represented using a bit field. This was
fast but had a few limitations.
 1. Asterisk was limited in how many formats it could handle.
 2. Formats, being a bit field, could not include any attribute information.
    A format was strictly its type, e.g., "this is ulaw".
This was changed in Asterisk 10 (see
https://wiki.asterisk.org/wiki/display/AST/Media+Architecture+Proposal for
notes on that work) which led to the creation of the ast_format structure.
This structure allowed Asterisk to handle attributes and bundle information
with a format.

Additionally, ast_format_cap was created to act as a container for multiple
formats that, together, formed the capability of some entity. Another
mechanism was added to allow logic to be registered which performed format
attribute negotiation. Everywhere throughout the codebase Asterisk was
changed to use this strategy.

Unfortunately, in software, there is no free lunch. These new capabilities
came at a cost.

Performance analysis and profiling showed that we spend an inordinate
amount of time comparing, copying, and generally manipulating formats and
their related structures. Basic prototyping has shown that a reasonably
large performance improvement could be made in this area. This patch is the
result of that project, which overhauled the media format architecture
and its usage in Asterisk to improve performance.

Generally, the new philosophy for handling formats is as follows:
 * The ast_format structure is reference counted. This removed a large amount
   of the memory allocations and copying that was done in prior versions.
 * In order to prevent race conditions while keeping things performant, the
   ast_format structure is immutable by convention and lock-free. Violate this
   tenet at your peril!
 * Because formats are reference counted, codecs are also reference counted.
   The Asterisk core generally provides built-in codecs and caches the
   ast_format structures created to represent them. Generally, to prevent
   inordinate amounts of module reference bumping, codecs and formats can be
   added at run-time but cannot be removed.
 * All compatibility with the bit field representation of codecs/formats has
   been moved to a compatibility API. The primary user of this representation
   is chan_iax2, which must continue to maintain its bit-field usage of formats
   for interoperability concerns.
 * When a format is negotiated with attributes, or when a format cannot be
   represented by one of the cached formats, a new format object is created or
   cloned from an existing format. That format may have the same codec
   underlying it, but is a different format than a version of the format with
   different attributes or without attributes.
 * While formats are reference counted objects, the reference count maintained
   on the format should be manipulated with care. Formats are generally cached
   and will persist for the lifetime of Asterisk and do not explicitly need
   to have their lifetime modified. An exception to this is when the user of a
   format does not know where the format came from *and* the user may outlive
   the provider of the format. This occurs, for example, when a format is read
   from a channel: the channel may have a format with attributes (hence,
   non-cached) and the user of the format may last longer than the channel (if
   the reference to the channel is released prior to the format's reference).

For more information on this work, see the API design notes:
  https://wiki.asterisk.org/wiki/display/AST/Media+Format+Rewrite

Finally, this work was the culmination of a large number of developer's
efforts. Extra thanks goes to Corey Farrell, who took on a large amount of the
work in the Asterisk core, chan_sip, and was an invaluable resource in peer
reviews throughout this project.

There were a substantial number of patches contributed during this work; the
following issues/patch names simply reflect some of the work (and will cause
the release scripts to give attribution to the individuals who work on them).

Reviews:
 https://reviewboard.asterisk.org/r/3814
 https://reviewboard.asterisk.org/r/3808
 https://reviewboard.asterisk.org/r/3805
 https://reviewboard.asterisk.org/r/3803
 https://reviewboard.asterisk.org/r/3801
 https://reviewboard.asterisk.org/r/3798
 https://reviewboard.asterisk.org/r/3800
 https://reviewboard.asterisk.org/r/3794
 https://reviewboard.asterisk.org/r/3793
 https://reviewboard.asterisk.org/r/3792
 https://reviewboard.asterisk.org/r/3791
 https://reviewboard.asterisk.org/r/3790
 https://reviewboard.asterisk.org/r/3789
 https://reviewboard.asterisk.org/r/3788
 https://reviewboard.asterisk.org/r/3787
 https://reviewboard.asterisk.org/r/3786
 https://reviewboard.asterisk.org/r/3784
 https://reviewboard.asterisk.org/r/3783
 https://reviewboard.asterisk.org/r/3778
 https://reviewboard.asterisk.org/r/3774
 https://reviewboard.asterisk.org/r/3775
 https://reviewboard.asterisk.org/r/3772
 https://reviewboard.asterisk.org/r/3761
 https://reviewboard.asterisk.org/r/3754
 https://reviewboard.asterisk.org/r/3753
 https://reviewboard.asterisk.org/r/3751
 https://reviewboard.asterisk.org/r/3750
 https://reviewboard.asterisk.org/r/3748
 https://reviewboard.asterisk.org/r/3747
 https://reviewboard.asterisk.org/r/3746
 https://reviewboard.asterisk.org/r/3742
 https://reviewboard.asterisk.org/r/3740
 https://reviewboard.asterisk.org/r/3739
 https://reviewboard.asterisk.org/r/3738
 https://reviewboard.asterisk.org/r/3737
 https://reviewboard.asterisk.org/r/3736
 https://reviewboard.asterisk.org/r/3734
 https://reviewboard.asterisk.org/r/3722
 https://reviewboard.asterisk.org/r/3713
 https://reviewboard.asterisk.org/r/3703
 https://reviewboard.asterisk.org/r/3689
 https://reviewboard.asterisk.org/r/3687
 https://reviewboard.asterisk.org/r/3674
 https://reviewboard.asterisk.org/r/3671
 https://reviewboard.asterisk.org/r/3667
 https://reviewboard.asterisk.org/r/3665
 https://reviewboard.asterisk.org/r/3625
 https://reviewboard.asterisk.org/r/3602
 https://reviewboard.asterisk.org/r/3519
 https://reviewboard.asterisk.org/r/3518
 https://reviewboard.asterisk.org/r/3516
 https://reviewboard.asterisk.org/r/3515
 https://reviewboard.asterisk.org/r/3512
 https://reviewboard.asterisk.org/r/3506
 https://reviewboard.asterisk.org/r/3413
 https://reviewboard.asterisk.org/r/3410
 https://reviewboard.asterisk.org/r/3387
 https://reviewboard.asterisk.org/r/3388
 https://reviewboard.asterisk.org/r/3389
 https://reviewboard.asterisk.org/r/3390
 https://reviewboard.asterisk.org/r/3321
 https://reviewboard.asterisk.org/r/3320
 https://reviewboard.asterisk.org/r/3319
 https://reviewboard.asterisk.org/r/3318
 https://reviewboard.asterisk.org/r/3266
 https://reviewboard.asterisk.org/r/3265
 https://reviewboard.asterisk.org/r/3234
 https://reviewboard.asterisk.org/r/3178

ASTERISK-23114 #close
Reported by: mjordan
  media_formats_translation_core.diff uploaded by kharwell (License 6464)
  rb3506.diff uploaded by mjordan (License 6283)
  media_format_app_file.diff uploaded by kharwell (License 6464) 
  misc-2.diff uploaded by file (License 5000)
  chan_mild-3.diff uploaded by file (License 5000) 
  chan_obscure.diff uploaded by file (License 5000) 
  jingle.diff uploaded by file (License 5000) 
  funcs.diff uploaded by file (License 5000) 
  formats.diff uploaded by file (License 5000) 
  core.diff uploaded by file (License 5000) 
  bridges.diff uploaded by file (License 5000) 
  mf-codecs-2.diff uploaded by file (License 5000) 
  mf-app_fax.diff uploaded by file (License 5000) 
  mf-apps-3.diff uploaded by file (License 5000) 
  media-formats-3.diff uploaded by file (License 5000) 

ASTERISK-23715
  rb3713.patch uploaded by coreyfarrell (License 5909)
  rb3689.patch uploaded by mjordan (License 6283)
  
ASTERISK-23957
  rb3722.patch uploaded by mjordan (License 6283) 
  mf-attributes-3.diff uploaded by file (License 5000) 

ASTERISK-23958
Tested by: jrose
  rb3822.patch uploaded by coreyfarrell (License 5909) 
  rb3800.patch uploaded by jrose (License 6182)
  chan_sip.diff uploaded by mjordan (License 6283) 
  rb3747.patch uploaded by jrose (License 6182)

ASTERISK-23959 #close
Tested by: sgriepentrog, mjordan, coreyfarrell
  sip_cleanup.diff uploaded by opticron (License 6273)
  chan_sip_caps.diff uploaded by mjordan (License 6283) 
  rb3751.patch uploaded by coreyfarrell (License 5909) 
  chan_sip-3.diff uploaded by file (License 5000) 

ASTERISK-23960 #close
Tested by: opticron
  direct_media.diff uploaded by opticron (License 6273) 
  pjsip-direct-media.diff uploaded by file (License 5000) 
  format_cap_remove.diff uploaded by opticron (License 6273) 
  media_format_fixes.diff uploaded by opticron (License 6273) 
  chan_pjsip-2.diff uploaded by file (License 5000) 

ASTERISK-23966 #close
Tested by: rmudgett
  rb3803.patch uploaded by rmudgetti (License 5621)
  chan_dahdi.diff uploaded by file (License 5000) 
  
ASTERISK-24064 #close
Tested by: coreyfarrell, mjordan, opticron, file, rmudgett, sgriepentrog, jrose
  rb3814.patch uploaded by rmudgett (License 5621) 
  moh_cleanup.diff uploaded by opticron (License 6273) 
  bridge_leak.diff uploaded by opticron (License 6273) 
  translate.diff uploaded by file (License 5000) 
  rb3795.patch uploaded by rmudgett (License 5621) 
  tls_fix.diff uploaded by mjordan (License 6283) 
  fax-mf-fix-2.diff uploaded by file (License 5000) 
  rtp_transfer_stuff uploaded by mjordan (License 6283) 
  rb3787.patch uploaded by rmudgett (License 5621) 
  media-formats-explicit-translate-format-3.diff uploaded by file (License 5000) 
  format_cache_case_fix.diff uploaded by opticron (License 6273) 
  rb3774.patch uploaded by rmudgett (License 5621) 
  rb3775.patch uploaded by rmudgett (License 5621) 
  rtp_engine_fix.diff uploaded by opticron (License 6273) 
  rtp_crash_fix.diff uploaded by opticron (License 6273) 
  rb3753.patch uploaded by mjordan (License 6283) 
  rb3750.patch uploaded by mjordan (License 6283) 
  rb3748.patch uploaded by rmudgett (License 5621) 
  media_format_fixes.diff uploaded by opticron (License 6273) 
  rb3740.patch uploaded by mjordan (License 6283) 
  rb3739.patch uploaded by mjordan (License 6283) 
  rb3734.patch uploaded by mjordan (License 6283) 
  rb3689.patch uploaded by mjordan (License 6283) 
  rb3674.patch uploaded by coreyfarrell (License 5909) 
  rb3671.patch uploaded by coreyfarrell (License 5909) 
  rb3667.patch uploaded by coreyfarrell (License 5909) 
  rb3665.patch uploaded by mjordan (License 6283) 
  rb3625.patch uploaded by coreyfarrell (License 5909) 
  rb3602.patch uploaded by coreyfarrell (License 5909) 
  format_compatibility-2.diff uploaded by file (License 5000) 
  core.diff uploaded by file (License 5000) 
  


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@419044 65c4cc65-6c06-0410-ace0-fbb531ad65f3
2014-07-20 22:06:33 +00:00

570 lines
16 KiB
C

/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2006, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief IAX Provisioning Protocol
*
* \author Mark Spencer <markster@digium.com>
*/
/*** MODULEINFO
<support_level>core</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <sys/socket.h>
#include "asterisk/config.h"
#include "asterisk/cli.h"
#include "asterisk/lock.h"
#include "asterisk/frame.h"
#include "asterisk/md5.h"
#include "asterisk/astdb.h"
#include "asterisk/utils.h"
#include "asterisk/acl.h"
#include "asterisk/format_cache.h"
#include "asterisk/format_compatibility.h"
#include "include/iax2.h"
#include "include/provision.h"
#include "include/parser.h"
static int provinit = 0;
struct iax_template {
int dead;
char name[80];
char src[80];
char user[20];
char pass[20];
char lang[10];
unsigned short port;
unsigned int server;
unsigned short serverport;
unsigned int altserver;
unsigned int flags;
iax2_format format;
unsigned int tos;
AST_LIST_ENTRY(iax_template) list;
};
static AST_LIST_HEAD_NOLOCK_STATIC(templates, iax_template);
AST_MUTEX_DEFINE_STATIC(provlock);
static struct iax_flag {
char *name;
int value;
} iax_flags[] = {
{ "register", PROV_FLAG_REGISTER },
{ "secure", PROV_FLAG_SECURE },
{ "heartbeat", PROV_FLAG_HEARTBEAT },
{ "debug", PROV_FLAG_DEBUG },
{ "disablecid", PROV_FLAG_DIS_CALLERID },
{ "disablecw", PROV_FLAG_DIS_CALLWAIT },
{ "disablecidcw", PROV_FLAG_DIS_CIDCW },
{ "disable3way", PROV_FLAG_DIS_THREEWAY },
};
char *iax_provflags2str(char *buf, int buflen, unsigned int flags)
{
int x;
if (!buf || buflen < 1)
return NULL;
buf[0] = '\0';
for (x = 0; x < ARRAY_LEN(iax_flags); x++) {
if (flags & iax_flags[x].value){
strncat(buf, iax_flags[x].name, buflen - strlen(buf) - 1);
strncat(buf, ",", buflen - strlen(buf) - 1);
}
}
if (!ast_strlen_zero(buf))
buf[strlen(buf) - 1] = '\0';
else
strncpy(buf, "none", buflen - 1);
return buf;
}
static unsigned int iax_str2flags(const char *buf)
{
int x;
int len;
unsigned int flags = 0;
char *e;
while(buf && *buf) {
e = strchr(buf, ',');
if (e)
len = e - buf;
else
len = 0;
for (x = 0; x < ARRAY_LEN(iax_flags); x++) {
if ((len && !strncasecmp(iax_flags[x].name, buf, len)) ||
(!len && !strcasecmp(iax_flags[x].name, buf))) {
flags |= iax_flags[x].value;
break;
}
}
if (e) {
buf = e + 1;
while(*buf && (*buf < 33))
buf++;
} else
break;
}
return flags;
}
static void iax_template_copy(struct iax_template *dst, struct iax_template *src)
{
if (!dst || !src) {
return;
}
dst->dead = src->dead;
ast_copy_string(dst->name, src->name, sizeof(dst->name));
ast_copy_string(dst->src, src->src, sizeof(dst->src));
ast_copy_string(dst->user, src->user, sizeof(dst->user));
ast_copy_string(dst->pass, src->pass, sizeof(dst->pass));
ast_copy_string(dst->lang, src->lang, sizeof(dst->lang));
dst->port = src->port;
dst->server = src->server;
dst->altserver = src->altserver;
dst->flags = src->flags;
dst->format = src->format;
dst->tos = src->tos;
}
static struct iax_template *iax_template_find(const char *s, int allowdead)
{
struct iax_template *cur;
AST_LIST_TRAVERSE(&templates, cur, list) {
if (!strcasecmp(s, cur->name)) {
if (!allowdead && cur->dead) {
cur = NULL;
}
break;
}
}
return cur;
}
char *iax_prov_complete_template(const char *line, const char *word, int pos, int state)
{
struct iax_template *c;
int which=0;
char *ret = NULL;
int wordlen = strlen(word);
if (pos == 3) {
ast_mutex_lock(&provlock);
AST_LIST_TRAVERSE(&templates, c, list) {
if (!strncasecmp(word, c->name, wordlen) && ++which > state) {
ret = ast_strdup(c->name);
break;
}
}
ast_mutex_unlock(&provlock);
}
return ret;
}
static unsigned int prov_ver_calc(struct iax_ie_data *provdata)
{
struct MD5Context md5;
unsigned int tmp[4];
MD5Init(&md5);
MD5Update(&md5, provdata->buf, provdata->pos);
MD5Final((unsigned char *)tmp, &md5);
return tmp[0] ^ tmp[1] ^ tmp[2] ^ tmp[3];
}
int iax_provision_build(struct iax_ie_data *provdata, unsigned int *signature, const char *template, int force)
{
struct iax_template *cur;
unsigned int sig;
char tmp[40];
memset(provdata, 0, sizeof(*provdata));
ast_mutex_lock(&provlock);
cur = iax_template_find(template, 1);
/* If no match, try searching for '*' */
if (!cur)
cur = iax_template_find("*", 1);
if (cur) {
/* found it -- add information elements as appropriate */
if (force || strlen(cur->user))
iax_ie_append_str(provdata, PROV_IE_USER, cur->user);
if (force || strlen(cur->pass))
iax_ie_append_str(provdata, PROV_IE_PASS, cur->pass);
if (force || strlen(cur->lang))
iax_ie_append_str(provdata, PROV_IE_LANG, cur->lang);
if (force || cur->port)
iax_ie_append_short(provdata, PROV_IE_PORTNO, cur->port);
if (force || cur->server)
iax_ie_append_int(provdata, PROV_IE_SERVERIP, cur->server);
if (force || cur->serverport)
iax_ie_append_short(provdata, PROV_IE_SERVERPORT, cur->serverport);
if (force || cur->altserver)
iax_ie_append_int(provdata, PROV_IE_ALTSERVER, cur->altserver);
if (force || cur->flags)
iax_ie_append_int(provdata, PROV_IE_FLAGS, cur->flags);
if (force || cur->format)
iax_ie_append_int(provdata, PROV_IE_FORMAT, cur->format);
if (force || cur->tos)
iax_ie_append_byte(provdata, PROV_IE_TOS, cur->tos);
/* Calculate checksum of message so far */
sig = prov_ver_calc(provdata);
if (signature)
*signature = sig;
/* Store signature */
iax_ie_append_int(provdata, PROV_IE_PROVVER, sig);
/* Cache signature for later verification so we need not recalculate all this */
snprintf(tmp, sizeof(tmp), "v0x%08x", sig);
ast_db_put("iax/provisioning/cache", template, tmp);
} else
ast_db_put("iax/provisioning/cache", template, "u");
ast_mutex_unlock(&provlock);
return cur ? 0 : -1;
}
int iax_provision_version(unsigned int *version, const char *template, int force)
{
char tmp[80] = "";
struct iax_ie_data ied;
int ret=0;
memset(&ied, 0, sizeof(ied));
ast_mutex_lock(&provlock);
if (ast_db_get("iax/provisioning/cache", template, tmp, sizeof(tmp))) {
ast_log(LOG_ERROR, "ast_db_get failed to retrieve iax/provisioning/cache/%s\n", template);
}
if (sscanf(tmp, "v%30x", version) != 1) {
if (strcmp(tmp, "u")) {
ret = iax_provision_build(&ied, version, template, force);
if (ret)
ast_debug(1, "Unable to create provisioning packet for '%s'\n", template);
} else
ret = -1;
} else
ast_debug(1, "Retrieved cached version '%s' = '%08x'\n", tmp, *version);
ast_mutex_unlock(&provlock);
return ret;
}
static int iax_template_parse(struct iax_template *cur, struct ast_config *cfg, const char *s, const char *def)
{
struct ast_variable *v;
int foundportno = 0;
int foundserverportno = 0;
int x;
struct in_addr ia;
struct hostent *hp;
struct ast_hostent h;
struct iax_template *src, tmp;
const char *t;
if (def) {
t = ast_variable_retrieve(cfg, s ,"template");
src = NULL;
if (t && strlen(t)) {
src = iax_template_find(t, 0);
if (!src)
ast_log(LOG_WARNING, "Unable to find base template '%s' for creating '%s'. Trying '%s'\n", t, s, def);
else
def = t;
}
if (!src) {
src = iax_template_find(def, 0);
if (!src)
ast_log(LOG_WARNING, "Unable to locate default base template '%s' for creating '%s', omitting.\n", def, s);
}
if (!src)
return -1;
ast_mutex_lock(&provlock);
/* Backup old data */
iax_template_copy(&tmp, cur);
/* Restore from src */
iax_template_copy(cur, src);
/* Restore important headers */
memcpy(cur->name, tmp.name, sizeof(cur->name));
cur->dead = tmp.dead;
ast_mutex_unlock(&provlock);
}
if (def)
ast_copy_string(cur->src, def, sizeof(cur->src));
else
cur->src[0] = '\0';
v = ast_variable_browse(cfg, s);
while(v) {
if (!strcasecmp(v->name, "port") || !strcasecmp(v->name, "serverport")) {
if ((sscanf(v->value, "%5d", &x) == 1) && (x > 0) && (x < 65535)) {
if (!strcasecmp(v->name, "port")) {
cur->port = x;
foundportno = 1;
} else {
cur->serverport = x;
foundserverportno = 1;
}
} else
ast_log(LOG_WARNING, "Ignoring invalid %s '%s' for '%s' at line %d\n", v->name, v->value, s, v->lineno);
} else if (!strcasecmp(v->name, "server") || !strcasecmp(v->name, "altserver")) {
hp = ast_gethostbyname(v->value, &h);
if (hp) {
memcpy(&ia, hp->h_addr, sizeof(ia));
if (!strcasecmp(v->name, "server"))
cur->server = ntohl(ia.s_addr);
else
cur->altserver = ntohl(ia.s_addr);
} else
ast_log(LOG_WARNING, "Ignoring invalid %s '%s' for '%s' at line %d\n", v->name, v->value, s, v->lineno);
} else if (!strcasecmp(v->name, "codec")) {
struct ast_format *tmpfmt;
if ((tmpfmt = ast_format_cache_get(v->value))) {
cur->format = ast_format_compatibility_format2bitfield(tmpfmt);
ao2_ref(tmpfmt, -1);
} else
ast_log(LOG_WARNING, "Ignoring invalid codec '%s' for '%s' at line %d\n", v->value, s, v->lineno);
} else if (!strcasecmp(v->name, "tos")) {
if (ast_str2tos(v->value, &cur->tos))
ast_log(LOG_WARNING, "Invalid tos value at line %d, refer to QoS documentation\n", v->lineno);
} else if (!strcasecmp(v->name, "user")) {
ast_copy_string(cur->user, v->value, sizeof(cur->user));
if (strcmp(cur->user, v->value))
ast_log(LOG_WARNING, "Truncating username from '%s' to '%s' for '%s' at line %d\n", v->value, cur->user, s, v->lineno);
} else if (!strcasecmp(v->name, "pass")) {
ast_copy_string(cur->pass, v->value, sizeof(cur->pass));
if (strcmp(cur->pass, v->value))
ast_log(LOG_WARNING, "Truncating password from '%s' to '%s' for '%s' at line %d\n", v->value, cur->pass, s, v->lineno);
} else if (!strcasecmp(v->name, "language")) {
ast_copy_string(cur->lang, v->value, sizeof(cur->lang));
if (strcmp(cur->lang, v->value))
ast_log(LOG_WARNING, "Truncating language from '%s' to '%s' for '%s' at line %d\n", v->value, cur->lang, s, v->lineno);
} else if (!strcasecmp(v->name, "flags")) {
cur->flags = iax_str2flags(v->value);
} else if (!strncasecmp(v->name, "flags", 5) && strchr(v->name, '+')) {
cur->flags |= iax_str2flags(v->value);
} else if (!strncasecmp(v->name, "flags", 5) && strchr(v->name, '-')) {
cur->flags &= ~iax_str2flags(v->value);
} else if (strcasecmp(v->name, "template")) {
ast_log(LOG_WARNING, "Unknown keyword '%s' in definition of '%s' at line %d\n", v->name, s, v->lineno);
}
v = v->next;
}
if (!foundportno)
cur->port = IAX_DEFAULT_PORTNO;
if (!foundserverportno)
cur->serverport = IAX_DEFAULT_PORTNO;
return 0;
}
static int iax_process_template(struct ast_config *cfg, char *s, char *def)
{
/* Find an already existing one if there */
struct iax_template *cur;
int mallocd = 0;
cur = iax_template_find(s, 1 /* allow dead */);
if (!cur) {
mallocd = 1;
cur = ast_calloc(1, sizeof(*cur));
if (!cur) {
ast_log(LOG_WARNING, "Out of memory!\n");
return -1;
}
/* Initialize entry */
ast_copy_string(cur->name, s, sizeof(cur->name));
cur->dead = 1;
}
if (!iax_template_parse(cur, cfg, s, def))
cur->dead = 0;
/* Link if we're mallocd */
if (mallocd) {
ast_mutex_lock(&provlock);
AST_LIST_INSERT_HEAD(&templates, cur, list);
ast_mutex_unlock(&provlock);
}
return 0;
}
static const char *ifthere(const char *s)
{
if (strlen(s))
return s;
else
return "<unspecified>";
}
static const char *iax_server(unsigned int addr)
{
struct in_addr ia;
if (!addr)
return "<unspecified>";
ia.s_addr = htonl(addr);
return ast_inet_ntoa(ia);
}
static char *iax_show_provisioning(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
struct iax_template *cur;
char server[INET_ADDRSTRLEN];
char alternate[INET_ADDRSTRLEN];
char flags[80]; /* Has to be big enough for 'flags' too */
int found = 0;
switch (cmd) {
case CLI_INIT:
e->command = "iax2 show provisioning";
e->usage =
"Usage: iax2 show provisioning [template]\n"
" Lists all known IAX provisioning templates or a\n"
" specific one if specified.\n";
return NULL;
case CLI_GENERATE:
return iax_prov_complete_template(a->line, a->word, a->pos, a->n);
}
if ((a->argc != 3) && (a->argc != 4))
return CLI_SHOWUSAGE;
ast_mutex_lock(&provlock);
AST_LIST_TRAVERSE(&templates, cur, list) {
if ((a->argc == 3) || (!strcasecmp(a->argv[3], cur->name))) {
if (found)
ast_cli(a->fd, "\n");
ast_copy_string(server, iax_server(cur->server), sizeof(server));
ast_copy_string(alternate, iax_server(cur->altserver), sizeof(alternate));
ast_cli(a->fd, "== %s ==\n", cur->name);
ast_cli(a->fd, "Base Templ: %s\n", strlen(cur->src) ? cur->src : "<none>");
ast_cli(a->fd, "Username: %s\n", ifthere(cur->user));
ast_cli(a->fd, "Secret: %s\n", ifthere(cur->pass));
ast_cli(a->fd, "Language: %s\n", ifthere(cur->lang));
ast_cli(a->fd, "Bind Port: %d\n", cur->port);
ast_cli(a->fd, "Server: %s\n", server);
ast_cli(a->fd, "Server Port: %d\n", cur->serverport);
ast_cli(a->fd, "Alternate: %s\n", alternate);
ast_cli(a->fd, "Flags: %s\n", iax_provflags2str(flags, sizeof(flags), cur->flags));
ast_cli(a->fd, "Format: %s\n", iax2_getformatname(cur->format));
ast_cli(a->fd, "TOS: 0x%x\n", cur->tos);
found++;
}
}
ast_mutex_unlock(&provlock);
if (!found) {
if (a->argc == 3)
ast_cli(a->fd, "No provisioning templates found\n");
else
ast_cli(a->fd, "No provisioning template matching '%s' found\n", a->argv[3]);
}
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_iax2_provision[] = {
AST_CLI_DEFINE(iax_show_provisioning, "Display iax provisioning"),
};
static int iax_provision_init(void)
{
ast_cli_register_multiple(cli_iax2_provision, sizeof(cli_iax2_provision) / sizeof(struct ast_cli_entry));
provinit = 1;
return 0;
}
static void iax_provision_free_templates(int dead)
{
struct iax_template *cur;
/* Drop dead or not (depending on dead) entries while locked */
ast_mutex_lock(&provlock);
AST_LIST_TRAVERSE_SAFE_BEGIN(&templates, cur, list) {
if ((dead && cur->dead) || !dead) {
AST_LIST_REMOVE_CURRENT(list);
ast_free(cur);
}
}
AST_LIST_TRAVERSE_SAFE_END;
ast_mutex_unlock(&provlock);
}
int iax_provision_unload(void)
{
provinit = 0;
ast_cli_unregister_multiple(cli_iax2_provision, sizeof(cli_iax2_provision) / sizeof(struct ast_cli_entry));
iax_provision_free_templates(0 /* Remove all templates. */);
return 0;
}
int iax_provision_reload(int reload)
{
struct ast_config *cfg;
struct iax_template *cur;
char *cat;
int found = 0;
struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
if (!provinit)
iax_provision_init();
cfg = ast_config_load2("iaxprov.conf", "chan_iax2", config_flags);
if (cfg != NULL && cfg != CONFIG_STATUS_FILEUNCHANGED && cfg != CONFIG_STATUS_FILEINVALID) {
/* Mark all as dead. No need for locking */
AST_LIST_TRAVERSE(&templates, cur, list) {
cur->dead = 1;
}
/* Load as appropriate */
cat = ast_category_browse(cfg, NULL);
while(cat) {
if (strcasecmp(cat, "general")) {
iax_process_template(cfg, cat, found ? "default" : NULL);
found++;
ast_verb(3, "Loaded provisioning template '%s'\n", cat);
}
cat = ast_category_browse(cfg, cat);
}
ast_config_destroy(cfg);
} else if (cfg == CONFIG_STATUS_FILEUNCHANGED)
return 0;
else
ast_log(LOG_NOTICE, "No IAX provisioning configuration found, IAX provisioning disabled.\n");
iax_provision_free_templates(1 /* remove only marked as dead */);
/* Purge cached signature DB entries */
ast_db_deltree("iax/provisioning/cache", NULL);
return 0;
}