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srtp: Allow zero as tag value for a sRTP Crypto Suite.

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ASTERISK-25490 #close

Change-Id: I1c5fc0942c33c96d62b24203aad0f1e1a1a0131f
This commit is contained in:
Alexander Traud
2017-03-29 15:04:05 +02:00
parent f43cfb81d9
commit e76cc51d5e
1 changed files with 2 additions and 2 deletions
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4
res/res_srtp.c
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@@ -782,8 +782,8 @@ static int res_sdp_crypto_parse_offer(struct ast_rtp_instance *rtp, struct ast_s
return -1; return -1;
} }
/* RFC4568 9.1 - tag is 1-9 digits, greater than zero */ /* RFC4568 9.1 - tag is 1-9 digits */
if (sscanf(tag, "%30d", &tag_from_sdp) != 1 || tag_from_sdp <= 0 || tag_from_sdp > 999999999) { if (sscanf(tag, "%30d", &tag_from_sdp) != 1 || tag_from_sdp < 0 || tag_from_sdp > 999999999) {
ast_log(LOG_WARNING, "Unacceptable a=crypto tag: %s\n", tag); ast_log(LOG_WARNING, "Unacceptable a=crypto tag: %s\n", tag);
return -1; return -1;
} }