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res_srtp: Set all possible flags while selecting the Crypto Suite.

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The flags of a previous selection could have been set within the
object 'srtp', for example, when the previous selection returned
failure after setting just 'some' flags. Now, not to clutter the
code, all possible flags are cleared first, and then the selected
flags are set as before.

ASTERISK-28903

Change-Id: I1b9d7aade7d5120244ce7e3a8865518cbd6e0eee
This commit is contained in:
Alexander Traud
2020-05-18 17:10:01 +02:00
committed by Joshua Colp
parent 441b614fa0
commit ab0ab19993
1 changed files with 8 additions and 0 deletions
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8
res/res_srtp.c
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@@ -863,6 +863,14 @@ static int res_sdp_crypto_parse_offer(struct ast_rtp_instance *rtp, struct ast_s
crypto->tag = tag_from_sdp;
}
ast_clear_flag(srtp, AST_SRTP_CRYPTO_TAG_8);
ast_clear_flag(srtp, AST_SRTP_CRYPTO_TAG_16);
ast_clear_flag(srtp, AST_SRTP_CRYPTO_TAG_32);
ast_clear_flag(srtp, AST_SRTP_CRYPTO_TAG_80);
ast_clear_flag(srtp, AST_SRTP_CRYPTO_AES_192);
ast_clear_flag(srtp, AST_SRTP_CRYPTO_AES_256);
ast_clear_flag(srtp, AST_SRTP_CRYPTO_OLD_NAME);
if (!strcmp(suite, "AES_CM_128_HMAC_SHA1_80")) {
suite_val = AST_AES_CM_128_HMAC_SHA1_80;
ast_set_flag(srtp, AST_SRTP_CRYPTO_TAG_80);