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rtpengine
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rtpengine/daemon/call.h

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#ifndef __CALL_H__
#define __CALL_H__
#include <sys/types.h>
#include <glib.h>
#include <time.h>
#include <sys/time.h>
#include <pcre.h>
#include <openssl/x509.h>
#include "compat.h"
enum termination_reason {
UNKNOWN=0,
REGULAR=1,
FORCED=2,
TIMEOUT=3,
SILENT_TIMEOUT=4
};
enum stream_address_format {
SAF_TCP,
SAF_UDP,
SAF_NG,
SAF_ICE,
};
enum call_opmode {
OP_OFFER = 0,
OP_ANSWER = 1,
OP_OTHER,
};
enum transport_protocol_index {
PROTO_RTP_AVP = 0,
PROTO_RTP_SAVP,
PROTO_RTP_AVPF,
PROTO_RTP_SAVPF,
PROTO_UDP_TLS_RTP_SAVP,
PROTO_UDP_TLS_RTP_SAVPF,
PROTO_UDPTL,
};
enum xmlrpc_format {
XF_SEMS = 0,
XF_CALLID,
};
struct call_monologue;
#include "obj.h"
#include "aux.h"
#include "bencode.h"
#include "str.h"
#include "crypto.h"
#include "dtls.h"
#define MAX_RTP_PACKET_SIZE 8192
#define RTP_BUFFER_HEAD_ROOM 128
#define RTP_BUFFER_TAIL_ROOM 512
#define RTP_BUFFER_SIZE (MAX_RTP_PACKET_SIZE + RTP_BUFFER_HEAD_ROOM + RTP_BUFFER_TAIL_ROOM)
#ifndef RTP_LOOP_PROTECT
#define RTP_LOOP_PROTECT 16 /* number of bytes */
#define RTP_LOOP_PACKETS 2 /* number of packets */
#define RTP_LOOP_MAX_COUNT 30 /* number of consecutively detected dupes to trigger protection */
#endif
#ifdef __DEBUG
#define __C_DBG(x...) ilog(LOG_DEBUG, x)
#else
#define __C_DBG(x...) ((void)0)
#endif
/* flags shared by several of the structs below */
#define SHARED_FLAG_IMPLICIT_RTCP 0x00000001
#define SHARED_FLAG_ASYMMETRIC 0x00000002
#define SHARED_FLAG_SEND 0x00000004
#define SHARED_FLAG_RECV 0x00000008
#define SHARED_FLAG_RTCP_MUX 0x00000010
#define SHARED_FLAG_SETUP_ACTIVE 0x00000020
#define SHARED_FLAG_SETUP_PASSIVE 0x00000040
#define SHARED_FLAG_ICE 0x00000080
#define SHARED_FLAG_STRICT_SOURCE 0x00000100
#define SHARED_FLAG_MEDIA_HANDOVER 0x00000200
/* struct stream_params */
#define SP_FLAG_NO_RTCP 0x00010000
#define SP_FLAG_IMPLICIT_RTCP SHARED_FLAG_IMPLICIT_RTCP
#define SP_FLAG_RTCP_MUX SHARED_FLAG_RTCP_MUX
#define SP_FLAG_SEND SHARED_FLAG_SEND
#define SP_FLAG_RECV SHARED_FLAG_RECV
#define SP_FLAG_ASYMMETRIC SHARED_FLAG_ASYMMETRIC
#define SP_FLAG_SETUP_ACTIVE SHARED_FLAG_SETUP_ACTIVE
#define SP_FLAG_SETUP_PASSIVE SHARED_FLAG_SETUP_PASSIVE
#define SP_FLAG_ICE SHARED_FLAG_ICE
#define SP_FLAG_STRICT_SOURCE SHARED_FLAG_STRICT_SOURCE
#define SP_FLAG_MEDIA_HANDOVER SHARED_FLAG_MEDIA_HANDOVER
/* struct packet_stream */
#define PS_FLAG_RTP 0x00010000
#define PS_FLAG_RTCP 0x00020000
#define PS_FLAG_IMPLICIT_RTCP SHARED_FLAG_IMPLICIT_RTCP
#define PS_FLAG_FALLBACK_RTCP 0x00040000
#define PS_FLAG_STUN 0x00080000
#define PS_FLAG_FILLED 0x00100000
#define PS_FLAG_CONFIRMED 0x00200000
#define PS_FLAG_KERNELIZED 0x00400000
#define PS_FLAG_NO_KERNEL_SUPPORT 0x00800000
#define PS_FLAG_HAS_HANDLER 0x01000000
#define PS_FLAG_FINGERPRINT_VERIFIED 0x02000000
#define PS_FLAG_STRICT_SOURCE SHARED_FLAG_STRICT_SOURCE
#define PS_FLAG_MEDIA_HANDOVER SHARED_FLAG_MEDIA_HANDOVER
/* struct call_media */
#define MEDIA_FLAG_INITIALIZED 0x00010000
#define MEDIA_FLAG_ASYMMETRIC SHARED_FLAG_ASYMMETRIC
#define MEDIA_FLAG_SEND SHARED_FLAG_SEND
#define MEDIA_FLAG_RECV SHARED_FLAG_RECV
#define MEDIA_FLAG_RTCP_MUX SHARED_FLAG_RTCP_MUX
#define MEDIA_FLAG_RTCP_MUX_OVERRIDE 0x00020000
#define MEDIA_FLAG_DTLS 0x00040000
#define MEDIA_FLAG_SDES 0x00080000
#define MEDIA_FLAG_SETUP_ACTIVE SHARED_FLAG_SETUP_ACTIVE
#define MEDIA_FLAG_SETUP_PASSIVE SHARED_FLAG_SETUP_PASSIVE
#define MEDIA_FLAG_PASSTHRU 0x00100000
#define MEDIA_FLAG_ICE SHARED_FLAG_ICE
/* access macros */
#define SP_ISSET(p, f) bf_isset(&(p)->sp_flags, SP_FLAG_ ## f)
#define SP_SET(p, f) bf_set(&(p)->sp_flags, SP_FLAG_ ## f)
#define SP_CLEAR(p, f) bf_clear(&(p)->sp_flags, SP_FLAG_ ## f)
#define PS_ISSET(p, f) bf_isset(&(p)->ps_flags, PS_FLAG_ ## f)
#define PS_SET(p, f) bf_set(&(p)->ps_flags, PS_FLAG_ ## f)
#define PS_CLEAR(p, f) bf_clear(&(p)->ps_flags, PS_FLAG_ ## f)
#define MEDIA_ISSET(p, f) bf_isset(&(p)->media_flags, MEDIA_FLAG_ ## f)
#define MEDIA_SET(p, f) bf_set(&(p)->media_flags, MEDIA_FLAG_ ## f)
#define MEDIA_CLEAR(p, f) bf_clear(&(p)->media_flags, MEDIA_FLAG_ ## f)
struct poller;
struct control_stream;
struct call;
struct redis;
struct crypto_suite;
struct rtpengine_srtp;
struct streamhandler;
struct sdp_ng_flags;
struct local_interface;
typedef bencode_buffer_t call_buffer_t;
#define call_buffer_alloc bencode_buffer_alloc
#define call_buffer_init bencode_buffer_init
#define call_buffer_free bencode_buffer_free
struct transport_protocol {
enum transport_protocol_index index;
const char *name;
int srtp:1;
int avpf:1;
};
extern const struct transport_protocol transport_protocols[];
struct stats {
u_int64_t packets;
u_int64_t bytes;
u_int64_t errors;
};
struct udp_fd {
int fd;
u_int16_t localport;
};
struct endpoint {
struct in6_addr ip46;
u_int16_t port;
};
struct stream_params {
unsigned int index; /* starting with 1 */
str type;
struct endpoint rtp_endpoint;
struct endpoint rtcp_endpoint;
unsigned int consecutive_ports;
const struct transport_protocol *protocol;
struct crypto_params crypto;
unsigned int sdes_tag;
str direction[2];
int desired_family;
struct dtls_fingerprint fingerprint;
unsigned int sp_flags;
};
struct stream_fd {
struct obj obj;
struct udp_fd fd; /* RO */
struct call *call; /* RO */
struct packet_stream *stream; /* LOCK: call->master_lock */
struct crypto_context crypto; /* IN direction, LOCK: stream->in_lock */
struct dtls_connection dtls; /* LOCK: stream->in_lock */
};
struct endpoint_map {
struct endpoint endpoint;
GQueue sfds;
int wildcard:1;
};
struct loop_protector {
unsigned int len;
unsigned char buf[RTP_LOOP_PROTECT];
};
struct packet_stream {
mutex_t in_lock,
out_lock;
/* Both locks valid only with call->master_lock held in R.
* Preempted by call->master_lock held in W.
* If both in/out are to be locked, in_lock must be locked first. */
struct call_media *media; /* RO */
struct call *call; /* RO */
struct stream_fd *sfd; /* LOCK: call->master_lock */
struct packet_stream *rtp_sink; /* LOCK: call->master_lock */
struct packet_stream *rtcp_sink; /* LOCK: call->master_lock */
struct packet_stream *rtcp_sibling; /* LOCK: call->master_lock */
const struct streamhandler *handler; /* LOCK: in_lock */
struct endpoint endpoint; /* LOCK: out_lock */
struct endpoint advertised_endpoint; /* RO */
struct crypto_context crypto; /* OUT direction, LOCK: out_lock */
struct stats stats; /* LOCK: in_lock */
struct stats kernel_stats; /* LOCK: in_lock */
time_t last_packet; /* LOCK: in_lock */
#if RTP_LOOP_PROTECT
/* LOCK: in_lock: */
unsigned int lp_idx;
struct loop_protector lp_buf[RTP_LOOP_PACKETS];
unsigned int lp_count;
#endif
X509 *dtls_cert; /* LOCK: in_lock */
/* in_lock must be held for SETTING these: */
/* (XXX replace with atomic ops where appropriate) */
unsigned int ps_flags;
};
/* protected by call->master_lock, except the RO elements */
struct call_media {
struct call_monologue *monologue; /* RO */
struct call *call; /* RO */
unsigned int index; /* RO */
str type; /* RO */
const struct transport_protocol *protocol;
int desired_family;
struct local_interface *interface;
/* local_address is protected by call->master_lock in W mode, but may
* still be modified if the lock is held in R mode, therefore we use
* atomic ops to access it when holding an R lock. */
volatile struct interface_address *local_address;
str ice_ufrag;
str ice_pwd;
struct {
struct crypto_params params;
unsigned int tag;
} sdes_in,
sdes_out;
struct dtls_fingerprint fingerprint; /* as received */
GQueue streams; /* normally RTP + RTCP */
GSList *endpoint_maps;
unsigned int media_flags;
};
/* half a dialogue */
/* protected by call->master_lock, except the RO elements */
struct call_monologue {
struct call *call; /* RO */
str tag;
time_t created; /* RO */
time_t deleted;
struct timeval started; /* for CDR */
struct timeval terminated; /* for CDR */
enum termination_reason term_reason;
GHashTable *other_tags;
struct call_monologue *active_dialogue;
GQueue medias;
};
struct call {
struct obj obj;
struct callmaster *callmaster; /* RO */
mutex_t buffer_lock;
call_buffer_t buffer;
/* everything below protected by master_lock */
rwlock_t master_lock;
GSList *monologues;
GHashTable *tags;
//GHashTable *branches;
GSList *streams;
GSList *stream_fds;
struct dtls_cert *dtls_cert; /* for outgoing */
str callid;
time_t created;
time_t last_signal;
time_t deleted;
time_t ml_deleted;
unsigned char tos;
};
struct local_interface {
str name;
GQueue ipv4; /* struct interface_address */
GQueue ipv6; /* struct interface_address */
};
struct interface_address {
str interface_name;
int family;
struct in6_addr addr;
struct in6_addr advertised;
str ice_foundation;
char foundation_buf[16];
};
struct callmaster_config {
int kernelfd;
int kernelid;
GQueue *interfaces; /* struct interface_address */
int port_min;
int port_max;
unsigned int timeout;
unsigned int silent_timeout;
struct redis *redis;
char *b2b_url;
unsigned char default_tos;
enum xmlrpc_format fmt;
};
struct callmaster {
struct obj obj;
rwlock_t hashlock;
GHashTable *callhash;
GHashTable *interfaces; /* struct local_interface */
GQueue interface_list; /* ditto */
mutex_t portlock;
u_int16_t lastport;
BIT_ARRAY_DECLARE(ports_used, 0x10000);
/* XXX rework these */
mutex_t statspslock;
struct stats statsps; /* per second stats, running timer */
mutex_t statslock;
struct stats stats; /* copied from statsps once a second */
struct poller *poller;
pcre *info_re;
pcre_extra *info_ree;
pcre *streams_re;
pcre_extra *streams_ree;
struct callmaster_config conf;
};
struct call_stats {
time_t last_packet;
struct stats totals[4]; /* rtp in, rtcp in, rtp out, rtcp out */
};
struct callmaster *callmaster_new(struct poller *);
void callmaster_config_init(struct callmaster *);
void stream_msg_mh_src(struct packet_stream *, struct msghdr *);
void callmaster_get_all_calls(struct callmaster *m, GQueue *q);
void calls_dump_redis(struct callmaster *);
struct call_monologue *__monologue_create(struct call *call);
void __monologue_tag(struct call_monologue *ml, const str *tag);
struct stream_fd *__stream_fd_new(struct udp_fd *fd, struct call *call);
int __get_consecutive_ports(struct udp_fd *array, int array_len, int wanted_start_port, const struct call *c);
struct packet_stream *__packet_stream_new(struct call *call);
struct call *call_get_or_create(const str *callid, struct callmaster *m);
struct call *call_get_opmode(const str *callid, struct callmaster *m, enum call_opmode opmode);
struct call_monologue *call_get_mono_dialogue(struct call *call, const str *fromtag, const str *totag);
int monologue_offer_answer(struct call_monologue *monologue, GQueue *streams, const struct sdp_ng_flags *flags);
int call_delete_branch(struct callmaster *m, const str *callid, const str *branch,
const str *fromtag, const str *totag, bencode_item_t *output);
void call_destroy(struct call *);
void kernelize(struct packet_stream *);
int call_stream_address(char *, struct packet_stream *, enum stream_address_format, int *);
int call_stream_address46(char *o, struct packet_stream *ps, enum stream_address_format format,
int *len, struct interface_address *ifa);
void get_all_interface_addresses(GQueue *q, struct local_interface *lif, int family);
struct local_interface *get_local_interface(struct callmaster *m, const str *name);
struct interface_address *get_any_interface_address(struct local_interface *lif, int family);
struct interface_address *get_interface_from_address(struct local_interface *lif, const struct in6_addr *addr);
const struct transport_protocol *transport_protocol(const str *s);
INLINE void *call_malloc(struct call *c, size_t l) {
void *ret;
mutex_lock(&c->buffer_lock);
ret = call_buffer_alloc(&c->buffer, l);
mutex_unlock(&c->buffer_lock);
return ret;
}
INLINE char *call_strdup_len(struct call *c, const char *s, unsigned int len) {
char *r;
r = call_malloc(c, len + 1);
memcpy(r, s, len);
r[len] = 0;
return r;
}
INLINE char *call_strdup(struct call *c, const char *s) {
if (!s)
return NULL;
return call_strdup_len(c, s, strlen(s));
}
INLINE str *call_str_cpy_len(struct call *c, str *out, const char *in, int len) {
if (!in) {
*out = STR_NULL;
return out;
}
out->s = call_strdup_len(c, in, len);
out->len = len;
return out;
}
INLINE str *call_str_cpy(struct call *c, str *out, const str *in) {
return call_str_cpy_len(c, out, in ? in->s : NULL, in ? in->len : 0);
}
INLINE str *call_str_cpy_c(struct call *c, str *out, const char *in) {
return call_str_cpy_len(c, out, in, in ? strlen(in) : 0);
}
INLINE str *call_str_dup(struct call *c, const str *in) {
str *out;
out = call_malloc(c, sizeof(*out));
call_str_cpy_len(c, out, in->s, in->len);
return out;
}
INLINE str *call_str_init_dup(struct call *c, char *s) {
str t;
str_init(&t, s);
return call_str_dup(c, &t);
}
INLINE void callmaster_exclude_port(struct callmaster *m, u_int16_t p) {
/* XXX atomic bit field? */
mutex_lock(&m->portlock);
bit_array_set(m->ports_used, p);
mutex_unlock(&m->portlock);
}
INLINE struct packet_stream *packet_stream_sink(struct packet_stream *ps) {
struct packet_stream *ret;
ret = ps->rtp_sink;
if (!ret)
ret = ps->rtcp_sink;
return ret;
}
#endif
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