Asterisk - The Open Source Telephony Project  21.4.1
Data Structures | Functions | Variables
res_srtp.c File Reference

Secure RTP (SRTP) More...

#include "asterisk.h"
#include <math.h>
#include <srtp2/srtp.h>
#include "srtp/srtp_compat.h"
#include <openssl/rand.h>
#include "asterisk/astobj2.h"
#include "asterisk/frame.h"
#include "asterisk/logger.h"
#include "asterisk/module.h"
#include "asterisk/sdp_srtp.h"
#include "asterisk/res_srtp.h"
#include "asterisk/rtp_engine.h"
#include "asterisk/utils.h"

Go to the source code of this file.

Data Structures

struct  ast_sdp_crypto
 
struct  ast_srtp
 
struct  ast_srtp_policy
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
static int ast_srtp_add_stream (struct ast_srtp *srtp, struct ast_srtp_policy *policy)
 
static int ast_srtp_change_source (struct ast_srtp *srtp, unsigned int from_ssrc, unsigned int to_ssrc)
 
static int ast_srtp_create (struct ast_srtp **srtp, struct ast_rtp_instance *rtp, struct ast_srtp_policy *policy)
 
static void ast_srtp_destroy (struct ast_srtp *srtp)
 
static int ast_srtp_get_random (unsigned char *key, size_t len)
 
static struct ast_srtp_policyast_srtp_policy_alloc (void)
 
static void ast_srtp_policy_destroy (struct ast_srtp_policy *policy)
 
static int ast_srtp_policy_set_master_key (struct ast_srtp_policy *policy, const unsigned char *key, size_t key_len, const unsigned char *salt, size_t salt_len)
 
static void ast_srtp_policy_set_ssrc (struct ast_srtp_policy *policy, unsigned long ssrc, int inbound)
 
static int ast_srtp_policy_set_suite (struct ast_srtp_policy *policy, enum ast_srtp_suite suite)
 
static int ast_srtp_protect (struct ast_srtp *srtp, void **buf, int *len, int rtcp)
 
static int ast_srtp_replace (struct ast_srtp **srtp, struct ast_rtp_instance *rtp, struct ast_srtp_policy *policy)
 
static void ast_srtp_set_cb (struct ast_srtp *srtp, const struct ast_srtp_cb *cb, void *data)
 
static int ast_srtp_unprotect (struct ast_srtp *srtp, void *buf, int *len, int rtcp)
 
static int crypto_activate (struct ast_sdp_crypto *p, int suite_val, unsigned char *remote_key, int key_len, struct ast_rtp_instance *rtp)
 
static struct ast_sdp_cryptocrypto_init_keys (struct ast_sdp_crypto *p, const int key_len)
 
static struct ast_srtp_policyfind_policy (struct ast_srtp *srtp, const srtp_policy_t *policy, int flags)
 
static int load_module (void)
 
static int policy_cmp_fn (void *obj, void *arg, int flags)
 
static void policy_destructor (void *obj)
 
static int policy_hash_fn (const void *obj, const int flags)
 
static int policy_set_suite (crypto_policy_t *p, enum ast_srtp_suite suite)
 
static struct ast_sdp_cryptores_sdp_crypto_alloc (void)
 
static int res_sdp_crypto_build_offer (struct ast_sdp_crypto *p, int taglen)
 
static void res_sdp_crypto_dtor (struct ast_sdp_crypto *crypto)
 
static int res_sdp_crypto_parse_offer (struct ast_rtp_instance *rtp, struct ast_sdp_srtp *srtp, const char *attr)
 
static const char * res_sdp_srtp_get_attr (struct ast_sdp_srtp *srtp, int dtls_enabled, int default_taglen_32)
 
static int res_srtp_init (void)
 
static struct ast_srtpres_srtp_new (void)
 
static void res_srtp_shutdown (void)
 
static struct ast_sdp_cryptosdp_crypto_alloc (const int key_len)
 
static int set_crypto_policy (struct ast_srtp_policy *policy, int suite_val, const unsigned char *master_key, int key_len, unsigned long ssrc, int inbound)
 
static const char * srtp_errstr (int err)
 
static void srtp_event_cb (srtp_event_data_t *data)
 
static int unload_module (void)
 

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_GLOBAL_SYMBOLS | AST_MODFLAG_LOAD_ORDER , .description = "Secure RTP (SRTP)" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_CHANNEL_DEPEND, }
 
static const struct ast_module_infoast_module_info = &__mod_info
 
static int g_initialized = 0
 
static struct ast_srtp_policy_res policy_res
 
static struct ast_sdp_crypto_api res_sdp_crypto_api
 
static struct ast_srtp_res srtp_res
 

Detailed Description

Secure RTP (SRTP)

Secure RTP (SRTP) Specified in RFC 3711.

Author
Mikael Magnusson mikma.nosp@m.@use.nosp@m.rs.so.nosp@m.urce.nosp@m.forge.nosp@m..net

Definition in file res_srtp.c.

Variable Documentation

int g_initialized = 0
static

Tracks whether or not we've initialized the libsrtp library

Definition at line 82 of file res_srtp.c.