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Use djb_hash(libname) as the RTP SSRC ID

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This commit is contained in:
Julien BLACHE 2010-10-03 17:01:08 +02:00
parent f13a83147d
commit a2329dfd3a
1 changed files with 11 additions and 1 deletions
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12
src/raop.c
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@ -193,6 +193,7 @@ static struct raop_service control_6svc;
static int sync_counter;
/* AirTunes v2 audio stream */
static uint32_t ssrc_id;
static uint16_t stream_seq;
/* Volume */
@ -2352,7 +2353,11 @@ raop_v2_make_packet(struct raop_v2_packet *pkt, uint8_t *rawbuf, uint64_t rtptim
memcpy(pkt->clear + 2, &seq, 2);
memcpy(pkt->clear + 4, &rtptime32, 4);
/* 4 bytes unknown */
/* RTP SSRC ID
* Note: should htobe32() that value, but it's just a
* random/unique ID so it's no big deal
*/
memcpy(pkt->clear + 8, &ssrc_id, 4);
/* Copy AirTunes v2 header to encrypted packet */
memcpy(pkt->encrypted, pkt->clear, AIRTUNES_V2_HDR_LEN);
@ -3112,6 +3117,7 @@ raop_init(void)
{
char ebuf[64];
char *ptr;
char *libname;
gpg_error_t gc_err;
int ret;
@ -3129,6 +3135,10 @@ raop_init(void)
sessions = NULL;
/* Generate RTP SSRC ID from library name */
libname = cfg_getstr(cfg_getsec(cfg, "library"), "name");
ssrc_id = djb_hash(libname, strlen(libname));
/* Random RTP sequence start */
gcry_randomize(&stream_seq, sizeof(stream_seq), GCRY_STRONG_RANDOM);