You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
863 lines
22 KiB
863 lines
22 KiB
#include "rtcp.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <glib.h>
|
|
|
|
#include "compat.h"
|
|
#include "str.h"
|
|
#include "call.h"
|
|
#include "log.h"
|
|
#include "rtp.h"
|
|
#include "crypto.h"
|
|
#include "rtcp_xr.h"
|
|
#include "homer.h"
|
|
#include "media_socket.h"
|
|
#include "rtcplib.h"
|
|
|
|
|
|
|
|
/* This toggles between two different and incompatible interpretations of
|
|
* RFC 3711, namely sections 4.3.2 and 4.3.1.
|
|
* See http://www.ietf.org/mail-archive/web/avt/current/msg06124.html
|
|
* The default (define not set) is to be compatible with libsrtp, but
|
|
* incompatible with a strict interpretation of the RFC.
|
|
*
|
|
* In Errata ID: 3712 the libsrtp behaviour (labels in the same place)
|
|
* is now considered canonical.
|
|
*
|
|
* https://www.rfc-editor.org/errata_search.php?rfc=3711
|
|
* https://github.com/cisco/libsrtp/issues/150
|
|
*/
|
|
#ifdef SRTCP_KEY_DERIVATION_RFC_COMPLIANCE
|
|
#define SRTCP_R_LENGTH 4
|
|
#else
|
|
#define SRTCP_R_LENGTH 6
|
|
#endif
|
|
|
|
#define RTCP_PT_SR 200 /* sender report */
|
|
#define RTCP_PT_RR 201 /* receiver report */
|
|
#define RTCP_PT_SDES 202 /* source description */
|
|
#define RTCP_PT_BYE 203 /* bye */
|
|
#define RTCP_PT_APP 204 /* application specific */
|
|
#define RTCP_PT_RTPFB 205 /* transport layer feedback message (RTP/AVPF) */
|
|
#define RTCP_PT_PSFB 206 /* payload-specific feedback message (RTP/AVPF) */
|
|
#define RTCP_PT_XR 207
|
|
|
|
#define SDES_TYPE_END 0
|
|
#define SDES_TYPE_CNAME 1
|
|
#define SDES_TYPE_NAME 2
|
|
#define SDES_TYPE_EMAIL 3
|
|
#define SDES_TYPE_PHONE 4
|
|
#define SDES_TYPE_LOC 5
|
|
#define SDES_TYPE_TOOL 6
|
|
#define SDES_TYPE_NOTE 7
|
|
#define SDES_TYPE_PRIV 8
|
|
|
|
|
|
|
|
struct report_block {
|
|
u_int32_t ssrc;
|
|
unsigned char fraction_lost;
|
|
unsigned char number_lost[3];
|
|
u_int32_t high_seq_received;
|
|
u_int32_t jitter;
|
|
u_int32_t lsr;
|
|
u_int32_t dlsr;
|
|
} __attribute__ ((packed));
|
|
|
|
struct sender_report_packet {
|
|
struct rtcp_packet rtcp;
|
|
u_int32_t ntp_msw;
|
|
u_int32_t ntp_lsw;
|
|
u_int32_t timestamp;
|
|
u_int32_t packet_count;
|
|
u_int32_t octet_count;
|
|
struct report_block reports[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct receiver_report_packet {
|
|
struct rtcp_packet rtcp;
|
|
struct report_block reports[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct sdes_item {
|
|
unsigned char type;
|
|
unsigned char length;
|
|
unsigned char data[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct sdes_chunk {
|
|
u_int32_t ssrc;
|
|
struct sdes_item items[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct source_description_packet {
|
|
struct rtcp_header header;
|
|
struct sdes_chunk chunks[0];
|
|
|
|
} __attribute__ ((packed));
|
|
|
|
struct bye_packet {
|
|
struct rtcp_header header;
|
|
u_int32_t ssrcs[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct app_packet {
|
|
struct rtcp_packet rtcp;
|
|
unsigned char name[4];
|
|
unsigned char data[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct fb_packet {
|
|
struct rtcp_packet rtcp;
|
|
u_int32_t media_ssrc;
|
|
unsigned char information[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct rtcp_chain_element {
|
|
int type;
|
|
unsigned int len;
|
|
union {
|
|
void *buf;
|
|
struct rtcp_packet *rtcp_packet;
|
|
struct sender_report_packet *sr;
|
|
struct receiver_report_packet *rr;
|
|
struct source_description_packet *sdes;
|
|
struct bye_packet *bye;
|
|
struct app_packet *app;
|
|
} u;
|
|
};
|
|
|
|
// log handlers
|
|
// struct defs
|
|
// context to hold state variables
|
|
struct rtcp_process_ctx {
|
|
u_int32_t scratch;
|
|
GString *log;
|
|
GString *json;
|
|
};
|
|
// all available methods
|
|
struct rtcp_handler {
|
|
void (*init)(struct rtcp_process_ctx *);
|
|
void (*start)(struct rtcp_process_ctx *, struct call *);
|
|
void (*common)(struct rtcp_process_ctx *, const pjmedia_rtcp_common *);
|
|
void (*sr)(struct rtcp_process_ctx *, const pjmedia_rtcp_sr *);
|
|
void (*rr_list_start)(struct rtcp_process_ctx *, const pjmedia_rtcp_common *);
|
|
void (*rr)(struct rtcp_process_ctx *, const pjmedia_rtcp_rr *);
|
|
void (*rr_list_end)(struct rtcp_process_ctx *);
|
|
void (*xr)(struct rtcp_process_ctx *, const pjmedia_rtcp_common *, str *);
|
|
void (*sdes_list_start)(struct rtcp_process_ctx *, const pjmedia_rtcp_common *);
|
|
void (*sdes_item)(struct rtcp_process_ctx *, const rtcp_sdes_chunk_t *, const rtcp_sdes_item_t *,
|
|
const char *);
|
|
void (*sdes_list_end)(struct rtcp_process_ctx *);
|
|
void (*finish)(struct rtcp_process_ctx *, struct call *, const endpoint_t *, const endpoint_t *,
|
|
const struct timeval *);
|
|
void (*destroy)(struct rtcp_process_ctx *);
|
|
};
|
|
// collection of all handler types
|
|
struct rtcp_handlers {
|
|
const struct rtcp_handler
|
|
*scratch,
|
|
*logging,
|
|
*homer;
|
|
};
|
|
|
|
// log handler function prototypes
|
|
static void dummy_handler();
|
|
|
|
// scratch area (prepare/parse packet)
|
|
static void scratch_rr(struct rtcp_process_ctx *, const pjmedia_rtcp_rr *);
|
|
|
|
// homer functions
|
|
static void homer_init(struct rtcp_process_ctx *);
|
|
static void homer_sr(struct rtcp_process_ctx *, const pjmedia_rtcp_sr *);
|
|
static void homer_rr_list_start(struct rtcp_process_ctx *, const pjmedia_rtcp_common *);
|
|
static void homer_rr(struct rtcp_process_ctx *, const pjmedia_rtcp_rr *);
|
|
static void homer_rr_list_end(struct rtcp_process_ctx *);
|
|
static void homer_sdes_list_start(struct rtcp_process_ctx *, const pjmedia_rtcp_common *);
|
|
static void homer_sdes_item(struct rtcp_process_ctx *, const rtcp_sdes_chunk_t *, const rtcp_sdes_item_t *,
|
|
const char *);
|
|
static void homer_sdes_list_end(struct rtcp_process_ctx *);
|
|
static void homer_finish(struct rtcp_process_ctx *, struct call *, const endpoint_t *, const endpoint_t *,
|
|
const struct timeval *);
|
|
|
|
// syslog functions
|
|
static void logging_init(struct rtcp_process_ctx *);
|
|
static void logging_start(struct rtcp_process_ctx *, struct call *);
|
|
static void logging_common(struct rtcp_process_ctx *, const pjmedia_rtcp_common *);
|
|
static void logging_sr(struct rtcp_process_ctx *, const pjmedia_rtcp_sr *);
|
|
static void logging_rr(struct rtcp_process_ctx *, const pjmedia_rtcp_rr *);
|
|
static void logging_xr(struct rtcp_process_ctx *, const pjmedia_rtcp_common *, str *);
|
|
static void logging_finish(struct rtcp_process_ctx *, struct call *, const endpoint_t *, const endpoint_t *,
|
|
const struct timeval *);
|
|
static void logging_destroy(struct rtcp_process_ctx *);
|
|
|
|
// structs for each handler type
|
|
static struct rtcp_handler dummy_handlers;
|
|
static struct rtcp_handler scratch_handlers = {
|
|
.rr = scratch_rr,
|
|
};
|
|
static struct rtcp_handler log_handlers = {
|
|
.init = logging_init,
|
|
.start = logging_start,
|
|
.common = logging_common,
|
|
.sr = logging_sr,
|
|
.rr = logging_rr,
|
|
.xr = logging_xr,
|
|
.finish = logging_finish,
|
|
.destroy = logging_destroy,
|
|
};
|
|
static struct rtcp_handler homer_handlers = {
|
|
.init = homer_init,
|
|
.sr = homer_sr,
|
|
.rr_list_start = homer_rr_list_start,
|
|
.rr = homer_rr,
|
|
.rr_list_end = homer_rr_list_end,
|
|
.sdes_list_start = homer_sdes_list_start,
|
|
.sdes_item = homer_sdes_item,
|
|
.sdes_list_end = homer_sdes_list_end,
|
|
.finish = homer_finish,
|
|
};
|
|
|
|
// main var to hold references
|
|
static struct rtcp_handlers rtcp_handlers = {
|
|
.scratch = &scratch_handlers,
|
|
};
|
|
|
|
// list of all handlers
|
|
static struct rtcp_handler *all_handlers[] = {
|
|
&dummy_handlers,
|
|
&scratch_handlers,
|
|
&log_handlers,
|
|
&homer_handlers,
|
|
};
|
|
|
|
// macro to call all function handlers in one go
|
|
#define CAH(func, ...) do { \
|
|
rtcp_handlers.scratch->func(&log_ctx, ##__VA_ARGS__); \
|
|
rtcp_handlers.logging->func(&log_ctx, ##__VA_ARGS__); \
|
|
rtcp_handlers.homer->func(&log_ctx, ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
|
|
|
|
|
|
|
|
typedef struct rtcp_chain_element *(*rtcp_handler_func)(str *);
|
|
|
|
static struct rtcp_chain_element *rtcp_sr(str *s);
|
|
static struct rtcp_chain_element *rtcp_rr(str *s);
|
|
static struct rtcp_chain_element *rtcp_sdes(str *s);
|
|
static struct rtcp_chain_element *rtcp_bye(str *s);
|
|
static struct rtcp_chain_element *rtcp_app(str *s);
|
|
static struct rtcp_chain_element *rtcp_rtpfb(str *s);
|
|
static struct rtcp_chain_element *rtcp_psfb(str *s);
|
|
|
|
|
|
|
|
|
|
|
|
static const rtcp_handler_func handler_funcs[] = {
|
|
[RTCP_PT_SR] = rtcp_sr,
|
|
[RTCP_PT_RR] = rtcp_rr,
|
|
[RTCP_PT_SDES] = rtcp_sdes,
|
|
[RTCP_PT_BYE] = rtcp_bye,
|
|
[RTCP_PT_APP] = rtcp_app,
|
|
[RTCP_PT_RTPFB] = rtcp_rtpfb,
|
|
[RTCP_PT_PSFB] = rtcp_psfb,
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void *rtcp_length_check(str *s, size_t min_len, unsigned int *len_p) {
|
|
struct rtcp_header *h;
|
|
|
|
if (s->len < min_len)
|
|
return NULL;
|
|
|
|
h = (void *) s->s;
|
|
*len_p = (ntohs(h->length) + 1) << 2;
|
|
|
|
if (*len_p > s->len)
|
|
return NULL;
|
|
|
|
return h;
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_new_element(void *p, unsigned int len, int type) {
|
|
struct rtcp_chain_element *el;
|
|
|
|
el = g_slice_alloc(sizeof(*el));
|
|
el->type = type;
|
|
el->len = len;
|
|
el->u.buf = p;
|
|
|
|
return el;
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_generic(str *s, int type) {
|
|
struct rtcp_header *p;
|
|
unsigned int len;
|
|
|
|
if (!(p = rtcp_length_check(s, sizeof(*p), &len)))
|
|
return NULL;
|
|
|
|
return rtcp_new_element(p, len, type);
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_Xr(str *s, int type, size_t struct_len) {
|
|
struct rtcp_packet *p;
|
|
unsigned int len;
|
|
|
|
if (!(p = rtcp_length_check(s, struct_len, &len)))
|
|
return NULL;
|
|
|
|
if (len < (p->header.v_p_x & 0x1f) * sizeof(struct report_block))
|
|
return NULL;
|
|
|
|
return rtcp_new_element(p, len, type);
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_sr(str *s) {
|
|
return rtcp_Xr(s, RTCP_PT_SR, sizeof(struct sender_report_packet));
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_rr(str *s) {
|
|
return rtcp_Xr(s, RTCP_PT_RR, sizeof(struct receiver_report_packet));
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_sdes(str *s) {
|
|
struct source_description_packet *p;
|
|
unsigned int len;
|
|
|
|
if (!(p = rtcp_length_check(s, sizeof(*p), &len)))
|
|
return NULL;
|
|
|
|
/* sdes items ... */
|
|
|
|
return rtcp_new_element(p, len, RTCP_PT_SDES);
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_bye(str *s) {
|
|
return rtcp_generic(s, RTCP_PT_BYE);
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_app(str *s) {
|
|
return rtcp_generic(s, RTCP_PT_APP);
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_rtpfb(str *s) {
|
|
return rtcp_generic(s, RTCP_PT_RTPFB);
|
|
}
|
|
|
|
static struct rtcp_chain_element *rtcp_psfb(str *s) {
|
|
return rtcp_generic(s, RTCP_PT_PSFB);
|
|
}
|
|
|
|
static void rtcp_ce_free(void *p) {
|
|
g_slice_free1(sizeof(struct rtcp_chain_element), p);
|
|
}
|
|
static void rtcp_list_free(GQueue *q) {
|
|
g_queue_clear_full(q, rtcp_ce_free);
|
|
}
|
|
|
|
// XXX do this only once for each RTCP packet and use the resulting list for everything
|
|
static int rtcp_parse(GQueue *q, str *_s) {
|
|
struct rtcp_packet *hdr;
|
|
struct rtcp_chain_element *el;
|
|
rtcp_handler_func func;
|
|
str s = *_s;
|
|
|
|
while (1) {
|
|
if (s.len < sizeof(*hdr))
|
|
break;
|
|
|
|
hdr = (void *) s.s;
|
|
|
|
if ((hdr->header.v_p_x & 0xc0) != 0x80) /* version 2 */
|
|
goto error;
|
|
|
|
if (hdr->header.pt >= G_N_ELEMENTS(handler_funcs))
|
|
goto error;
|
|
func = handler_funcs[hdr->header.pt];
|
|
if (!func)
|
|
goto error;
|
|
|
|
el = func(&s);
|
|
if (!el)
|
|
goto error;
|
|
|
|
g_queue_push_tail(q, el);
|
|
|
|
if (str_shift(&s, el->len))
|
|
abort();
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
rtcp_list_free(q);
|
|
return -1;
|
|
}
|
|
|
|
int rtcp_avpf2avp(str *s) {
|
|
GQueue rtcp_list = G_QUEUE_INIT;
|
|
GList *l;
|
|
struct rtcp_chain_element *el;
|
|
void *start;
|
|
unsigned int removed, left;
|
|
|
|
if (rtcp_parse(&rtcp_list, s))
|
|
return 0;
|
|
|
|
left = s->len;
|
|
removed = 0;
|
|
for (l = rtcp_list.head; l; l = l->next) {
|
|
el = l->data;
|
|
left -= el->len;
|
|
|
|
switch (el->type) {
|
|
case RTCP_PT_RTPFB:
|
|
case RTCP_PT_PSFB:
|
|
start = el->u.buf;
|
|
memmove(start - removed, start + el->len - removed, left);
|
|
removed += el->len;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
rtcp_list_free(&rtcp_list);
|
|
|
|
s->len -= removed;
|
|
if (!s->len)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
INLINE int check_session_keys(struct crypto_context *c) {
|
|
str s;
|
|
const char *err;
|
|
|
|
if (c->have_session_key)
|
|
return 0;
|
|
err = "SRTCP output wanted, but no crypto suite was negotiated";
|
|
if (!c->params.crypto_suite)
|
|
goto error;
|
|
|
|
err = "Failed to generate SRTCP session keys";
|
|
str_init_len_assert(&s, c->session_key, c->params.crypto_suite->session_key_len);
|
|
if (crypto_gen_session_key(c, &s, 0x03, SRTCP_R_LENGTH))
|
|
goto error;
|
|
str_init_len_assert(&s, c->session_auth_key, c->params.crypto_suite->srtcp_auth_key_len);
|
|
if (crypto_gen_session_key(c, &s, 0x04, SRTCP_R_LENGTH))
|
|
goto error;
|
|
str_init_len_assert(&s, c->session_salt, c->params.crypto_suite->session_salt_len);
|
|
if (crypto_gen_session_key(c, &s, 0x05, SRTCP_R_LENGTH))
|
|
goto error;
|
|
|
|
c->have_session_key = 1;
|
|
crypto_init_session_key(c);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
ilog(LOG_ERROR | LOG_FLAG_LIMIT, "%s", err);
|
|
return -1;
|
|
}
|
|
|
|
static int rtcp_payload(struct rtcp_packet **out, str *p, const str *s) {
|
|
struct rtcp_packet *rtcp;
|
|
const char *err;
|
|
|
|
err = "short packet (header)";
|
|
if (s->len < sizeof(*rtcp))
|
|
goto error;
|
|
|
|
rtcp = (void *) s->s;
|
|
|
|
err = "invalid header version";
|
|
if ((rtcp->header.v_p_x & 0xc0) != 0x80) /* version 2 */
|
|
goto error;
|
|
err = "invalid packet type";
|
|
if (rtcp->header.pt != RTCP_PT_SR
|
|
&& rtcp->header.pt != RTCP_PT_RR)
|
|
goto error;
|
|
|
|
*p = *s;
|
|
str_shift(p, sizeof(*rtcp));
|
|
*out = rtcp;
|
|
|
|
return 0;
|
|
error:
|
|
ilog(LOG_WARNING | LOG_FLAG_LIMIT, "Error parsing RTCP header: %s", err);
|
|
return -1;
|
|
}
|
|
|
|
/* rfc 3711 section 3.4 */
|
|
int rtcp_avp2savp(str *s, struct crypto_context *c) {
|
|
struct rtcp_packet *rtcp;
|
|
u_int32_t *idx;
|
|
str to_auth, payload;
|
|
|
|
if (rtcp_payload(&rtcp, &payload, s))
|
|
return -1;
|
|
if (check_session_keys(c))
|
|
return -1;
|
|
|
|
if (!c->params.session_params.unencrypted_srtcp && crypto_encrypt_rtcp(c, rtcp, &payload, c->last_index))
|
|
return -1;
|
|
|
|
idx = (void *) s->s + s->len;
|
|
*idx = htonl((c->params.session_params.unencrypted_srtcp ? 0ULL : 0x80000000ULL) | c->last_index++);
|
|
s->len += sizeof(*idx);
|
|
|
|
to_auth = *s;
|
|
|
|
rtp_append_mki(s, c);
|
|
|
|
c->params.crypto_suite->hash_rtcp(c, s->s + s->len, &to_auth);
|
|
s->len += c->params.crypto_suite->srtcp_auth_tag;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* rfc 3711 section 3.4 */
|
|
int rtcp_savp2avp(str *s, struct crypto_context *c) {
|
|
struct rtcp_packet *rtcp;
|
|
str payload, to_auth, to_decrypt, auth_tag;
|
|
u_int32_t idx, *idx_p;
|
|
char hmac[20];
|
|
const char *err;
|
|
|
|
if (rtcp_payload(&rtcp, &payload, s))
|
|
return -1;
|
|
if (check_session_keys(c))
|
|
return -1;
|
|
|
|
if (srtp_payloads(&to_auth, &to_decrypt, &auth_tag, NULL,
|
|
c->params.crypto_suite->srtcp_auth_tag, c->params.mki_len,
|
|
s, &payload))
|
|
return -1;
|
|
|
|
err = "short packet";
|
|
if (to_decrypt.len < sizeof(idx))
|
|
goto error;
|
|
to_decrypt.len -= sizeof(idx);
|
|
idx_p = (void *) to_decrypt.s + to_decrypt.len;
|
|
idx = ntohl(*idx_p);
|
|
|
|
assert(sizeof(hmac) >= auth_tag.len);
|
|
c->params.crypto_suite->hash_rtcp(c, hmac, &to_auth);
|
|
err = "authentication failed";
|
|
if (str_memcmp(&auth_tag, hmac))
|
|
goto error;
|
|
|
|
if ((idx & 0x80000000ULL)) {
|
|
if (crypto_decrypt_rtcp(c, rtcp, &to_decrypt, idx & 0x7fffffffULL))
|
|
return -1;
|
|
}
|
|
|
|
*s = to_auth;
|
|
s->len -= sizeof(idx);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
ilog(LOG_WARNING | LOG_FLAG_LIMIT, "Discarded invalid SRTCP packet: %s", err);
|
|
return -1;
|
|
}
|
|
|
|
|
|
static void str_sanitize(GString *s) {
|
|
while (s->len > 0 && (s->str[s->len - 1] == ' ' || s->str[s->len - 1] == ','))
|
|
g_string_truncate(s, s->len - 1);
|
|
}
|
|
|
|
void parse_and_log_rtcp_report(struct stream_fd *sfd, const str *ori_s, const endpoint_t *src,
|
|
const struct timeval *tv)
|
|
{
|
|
|
|
str iter_s, comp_s;
|
|
pjmedia_rtcp_common *common;
|
|
const pjmedia_rtcp_rr *rr;
|
|
const pjmedia_rtcp_sr *sr;
|
|
const rtcp_sdes_chunk_t *sdes_chunk;
|
|
const rtcp_sdes_item_t *sdes_item;
|
|
struct call *c = sfd->call;
|
|
int i;
|
|
struct rtcp_process_ctx log_ctx;
|
|
|
|
ZERO(log_ctx);
|
|
CAH(init);
|
|
CAH(start, c);
|
|
|
|
iter_s = *ori_s;
|
|
|
|
while (iter_s.len) {
|
|
// procedure throughout here: first assign, then str_shift with check for
|
|
// return value (does the length sanity check), then access values.
|
|
// we use iter_s to iterate compound packets and comp_s to access component
|
|
// data.
|
|
|
|
common = (pjmedia_rtcp_common*) iter_s.s;
|
|
comp_s = iter_s;
|
|
|
|
if (str_shift(&comp_s, sizeof(*common))) // puts comp_s just past the common header
|
|
break;
|
|
if (str_shift(&iter_s, (ntohs(common->length) + 1) << 2)) // puts iter_s on the next compound packet
|
|
break;
|
|
|
|
CAH(common, common);
|
|
|
|
/* Parse RTCP */
|
|
switch (common->pt) {
|
|
case RTCP_PT_SR:
|
|
sr = (pjmedia_rtcp_sr*) ((comp_s.s));
|
|
if (str_shift(&comp_s, sizeof(*sr)))
|
|
break;
|
|
|
|
CAH(sr, sr);
|
|
// fall through to RTCP_PT_RR
|
|
|
|
case RTCP_PT_RR:
|
|
CAH(rr_list_start, common);
|
|
|
|
for (i = 0; i < common->count; i++) {
|
|
rr = (pjmedia_rtcp_rr*)((comp_s.s));
|
|
if (str_shift(&comp_s, sizeof(*rr)))
|
|
break;
|
|
CAH(rr, rr);
|
|
}
|
|
|
|
CAH(rr_list_end);
|
|
break;
|
|
|
|
case RTCP_PT_XR:
|
|
CAH(xr, common, &comp_s);
|
|
break;
|
|
|
|
case RTCP_PT_SDES:
|
|
CAH(sdes_list_start, common);
|
|
|
|
// the "common" header actually includes the SDES
|
|
// SSRC/CSRC chunk header, so we set our chunk header
|
|
// to its SDES field
|
|
sdes_chunk = (rtcp_sdes_chunk_t *) &common->ssrc;
|
|
// comp_s then points into the first SDES item
|
|
|
|
i = 0;
|
|
while (1) {
|
|
while (comp_s.len) {
|
|
sdes_item = (rtcp_sdes_item_t *) comp_s.s;
|
|
// check for zero type first
|
|
if (str_shift(&comp_s, 1))
|
|
break;
|
|
if (!sdes_item->type)
|
|
break;
|
|
if (str_shift(&comp_s, sizeof(*sdes_item) - 1))
|
|
break;
|
|
if (comp_s.len < sdes_item->len)
|
|
break;
|
|
CAH(sdes_item, sdes_chunk, sdes_item, comp_s.s);
|
|
str_shift(&comp_s, sdes_item->len);
|
|
}
|
|
|
|
// remove padding to next chunk
|
|
while (comp_s.len % 4 != 0)
|
|
str_shift(&comp_s, 1);
|
|
|
|
// more chunks? set chunk header
|
|
i++;
|
|
if (i >= common->count)
|
|
break;
|
|
sdes_chunk = (rtcp_sdes_chunk_t *) comp_s.s;
|
|
if (str_shift(&comp_s, sizeof(*sdes_chunk)))
|
|
break;
|
|
|
|
}
|
|
|
|
CAH(sdes_list_end);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
CAH(finish, c, src, &sfd->socket.local, tv);
|
|
CAH(destroy);
|
|
}
|
|
|
|
static void dummy_handler() {
|
|
return;
|
|
}
|
|
|
|
static void scratch_rr(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_rr *rr) {
|
|
ctx->scratch = (rr->total_lost_2 << 16) + (rr->total_lost_1 << 8) + rr->total_lost_0;
|
|
}
|
|
|
|
static void homer_init(struct rtcp_process_ctx *ctx) {
|
|
ctx->json = g_string_new("{ ");
|
|
}
|
|
static void homer_sr(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_sr* sr) {
|
|
g_string_append_printf(ctx->json, "\"sender_information\":{\"ntp_timestamp_sec\":%u,"
|
|
"\"ntp_timestamp_usec\":%u,\"octets\":%u,\"rtp_timestamp\":%u, \"packets\":%u},",
|
|
ntohl(sr->ntp_sec),
|
|
ntohl(sr->ntp_frac),
|
|
ntohl(sr->sender_bcount),
|
|
ntohl(sr->rtp_ts),
|
|
ntohl(sr->sender_pcount));
|
|
}
|
|
static void homer_rr_list_start(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_common *common) {
|
|
g_string_append_printf(ctx->json, "\"ssrc\":%u,\"type\":%u,\"report_count\":%u,\"report_blocks\":[",
|
|
ntohl(common->ssrc),
|
|
common->pt,
|
|
common->count);
|
|
}
|
|
static void homer_rr(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_rr *rr) {
|
|
g_string_append_printf(ctx->json, "{\"source_ssrc\":%u,"
|
|
"\"highest_seq_no\":%u,\"fraction_lost\":%u,\"ia_jitter\":%u,"
|
|
"\"packets_lost\":%u,\"lsr\":%u,\"dlsr\":%u},",
|
|
ntohl(rr->ssrc),
|
|
ntohl(rr->last_seq),
|
|
rr->fract_lost,
|
|
ntohl(rr->jitter),
|
|
ctx->scratch,
|
|
ntohl(rr->lsr),
|
|
ntohl(rr->dlsr));
|
|
}
|
|
static void homer_rr_list_end(struct rtcp_process_ctx *ctx) {
|
|
str_sanitize(ctx->json);
|
|
g_string_append_printf(ctx->json, "],");
|
|
}
|
|
static void homer_sdes_list_start(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_common *common) {
|
|
g_string_append_printf(ctx->json, "\"sdes_ssrc\":%u,\"sdes_report_count\":%u,\"sdes_information\": [ ",
|
|
ntohl(common->ssrc),
|
|
common->count);
|
|
}
|
|
static void homer_sdes_item(struct rtcp_process_ctx *ctx, const rtcp_sdes_chunk_t *chunk,
|
|
const rtcp_sdes_item_t *item, const char *data)
|
|
{
|
|
int i;
|
|
|
|
g_string_append_printf(ctx->json, "{\"sdes_chunk_ssrc\":%u,\"type\":%u,\"text\":\"",
|
|
htonl(chunk->csrc),
|
|
item->type);
|
|
|
|
for (i = 0; i < item->len; i++) {
|
|
switch (data[i]) {
|
|
case '"':
|
|
g_string_append(ctx->json, "\\\"");
|
|
break;
|
|
case '\\':
|
|
g_string_append(ctx->json, "\\\\");
|
|
break;
|
|
case '\b':
|
|
g_string_append(ctx->json, "\\b");
|
|
break;
|
|
case '\f':
|
|
g_string_append(ctx->json, "\\f");
|
|
break;
|
|
case '\n':
|
|
g_string_append(ctx->json, "\\n");
|
|
break;
|
|
case '\r':
|
|
g_string_append(ctx->json, "\\r");
|
|
break;
|
|
case '\t':
|
|
g_string_append(ctx->json, "\\t");
|
|
break;
|
|
default:
|
|
g_string_append_c(ctx->json, data[i]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
g_string_append(ctx->json, "\"},");
|
|
}
|
|
static void homer_sdes_list_end(struct rtcp_process_ctx *ctx) {
|
|
str_sanitize(ctx->json);
|
|
g_string_append_printf(ctx->json, "],");
|
|
}
|
|
static void homer_finish(struct rtcp_process_ctx *ctx, struct call *c, const endpoint_t *src,
|
|
const endpoint_t *dst, const struct timeval *tv)
|
|
{
|
|
str_sanitize(ctx->json);
|
|
g_string_append(ctx->json, " }");
|
|
homer_send(ctx->json, &c->callid, src, dst, tv);
|
|
ctx->json = NULL;
|
|
}
|
|
|
|
static void logging_init(struct rtcp_process_ctx *ctx) {
|
|
ctx->log = g_string_new(NULL);
|
|
}
|
|
static void logging_start(struct rtcp_process_ctx *ctx, struct call *c) {
|
|
g_string_append_printf(ctx->log, "["STR_FORMAT"] ", STR_FMT(&c->callid));
|
|
}
|
|
static void logging_common(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_common *common) {
|
|
g_string_append_printf(ctx->log,"version=%u, padding=%u, count=%u, payloadtype=%u, length=%u, ssrc=%u, ",
|
|
common->version,
|
|
common->p,
|
|
common->count,
|
|
common->pt,
|
|
ntohl(common->length),
|
|
ntohl(common->ssrc));
|
|
}
|
|
static void logging_sr(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_sr* sr) {
|
|
g_string_append_printf(ctx->log,"ntp_sec=%u, ntp_fractions=%u, rtp_ts=%u, sender_packets=%u, sender_bytes=%u, ",
|
|
ntohl(sr->ntp_sec),
|
|
ntohl(sr->ntp_frac),
|
|
ntohl(sr->rtp_ts),
|
|
ntohl(sr->sender_pcount),
|
|
ntohl(sr->sender_bcount));
|
|
}
|
|
static void logging_rr(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_rr *rr) {
|
|
g_string_append_printf(ctx->log,"ssrc=%u, fraction_lost=%u, packet_loss=%u, last_seq=%u, jitter=%u, last_sr=%u, delay_since_last_sr=%u, ",
|
|
ntohl(rr->ssrc),
|
|
rr->fract_lost,
|
|
ctx->scratch,
|
|
ntohl(rr->last_seq),
|
|
ntohl(rr->jitter),
|
|
ntohl(rr->lsr),
|
|
ntohl(rr->dlsr));
|
|
}
|
|
static void logging_xr(struct rtcp_process_ctx *ctx, const pjmedia_rtcp_common *common, str *comp_s) {
|
|
pjmedia_rtcp_xr_rx_rtcp_xr(ctx->log, common, comp_s);
|
|
}
|
|
static void logging_finish(struct rtcp_process_ctx *ctx, struct call *c, const endpoint_t *src,
|
|
const endpoint_t *dst, const struct timeval *tv)
|
|
{
|
|
str_sanitize(ctx->log);
|
|
rtcplog(ctx->log->str);
|
|
}
|
|
static void logging_destroy(struct rtcp_process_ctx *ctx) {
|
|
g_string_free(ctx->log, TRUE);
|
|
}
|
|
|
|
|
|
|
|
void rtcp_init() {
|
|
rtcp_handlers.logging = _log_facility_rtcp ? &log_handlers : &dummy_handlers;
|
|
rtcp_handlers.homer = has_homer() ? &homer_handlers : &dummy_handlers;
|
|
|
|
// walk through list of handlers and fill missing entries to dummy handler
|
|
void *dummy = dummy_handler;
|
|
for (int i = 0; i < G_N_ELEMENTS(all_handlers); i++) {
|
|
struct rtcp_handler *lh = all_handlers[i];
|
|
for (int j = 0; j < (sizeof(*lh) / sizeof(void *)); j++) {
|
|
void **ptr = (void *) lh;
|
|
ptr += j;
|
|
if (*ptr == NULL)
|
|
*ptr = dummy;
|
|
}
|
|
}
|
|
}
|