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res_rtp_asterisk.c: Check RTP packet version earlier.

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Change-Id: Ic6493a7d79683f3e5845dff1cee49445fd5a0adf
This commit is contained in:
Richard Mudgett
2017-08-25 17:05:06 -05:00
parent 7b240d1734
commit 6c922b3157
1 changed files with 5 additions and 5 deletions
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10
res/res_rtp_asterisk.c
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@@ -5070,6 +5070,11 @@ static struct ast_frame *ast_rtp_read(struct ast_rtp_instance *instance, int rtc
return &ast_null_frame; return &ast_null_frame;
} }
/* If the version is not what we expected by this point then just drop the packet */
if (version != 2) {
return &ast_null_frame;
}
/* If strict RTP protection is enabled see if we need to learn the remote address or if we need to drop the packet */ /* If strict RTP protection is enabled see if we need to learn the remote address or if we need to drop the packet */
if (rtp->strict_rtp_state == STRICT_RTP_LEARN) { if (rtp->strict_rtp_state == STRICT_RTP_LEARN) {
if (!ast_sockaddr_cmp(&rtp->strict_rtp_address, &addr)) { if (!ast_sockaddr_cmp(&rtp->strict_rtp_address, &addr)) {
@@ -5116,11 +5121,6 @@ static struct ast_frame *ast_rtp_read(struct ast_rtp_instance *instance, int rtc
} }
} }
/* If the version is not what we expected by this point then just drop the packet */
if (version != 2) {
return &ast_null_frame;
}
/* Pull out the various other fields we will need */ /* Pull out the various other fields we will need */
payloadtype = (seqno & 0x7f0000) >> 16; payloadtype = (seqno & 0x7f0000) >> 16;
padding = seqno & (1 << 29); padding = seqno & (1 << 29);