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Commit c0e4237b authored by Ravinder Konka's avatar Ravinder Konka
Browse files

netfilter: Changes to handle MT call issue in SIP ALG 



Changes to handle SIP segmentation for Mobile Terminated
call.

Change-Id: Ia4c83fb18c0e92e8402742f50c0ef05a344e51a4
Signed-off-by: default avatarRavinder Konka <rkonka@codeaurora.org>
parent 93a10a8b

net/netfilter/nf_conntrack_sip.c

+11 −12
Original line number Diff line number Diff line
@@ -1761,6 +1761,7 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff, 
	bool skb_is_combined = false;

	enum ip_conntrack_dir dir = IP_CT_DIR_MAX;

	struct sk_buff *combined_skb = NULL;

	bool content_len_exists = 1;



	typeof(nf_nat_sip_seq_adjust_hook) nf_nat_sip_seq_adjust;
@@ -1808,14 +1809,14 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff, 
				      SIP_HDR_CONTENT_LENGTH,

				      &matchoff, &matchlen) <= 0){

			do_not_process = true;

			content_len_exists = 0;

			goto destination;

		}





		clen = simple_strtoul(dptr + matchoff, (char **)&end, 10);

		if (dptr + matchoff == end) {

			do_not_process = true;

			goto destination;

			break;

		}



		term = false;
@@ -1826,16 +1827,15 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff, 
				break;

			}

		}

		if (!term) {

				do_not_process = true;

				goto destination;

		}

		if (!term)

			break;



		end += strlen("\r\n\r\n") + clen;

		msglen = origlen = end - dptr;



destination:



		if (content_len_exists == 0)

			msglen = origlen = datalen;

		else

			msglen = origlen = end - dptr;

		if (ct)

			dir = CTINFO2DIR(ctinfo);

		combined_skb = skb;
@@ -1888,10 +1888,9 @@ destination: 
		dataoff += msglen;

		dptr	+= msglen;

		datalen  = datalen + diff - msglen;



		if (skb_is_combined)

			break;

	}



	if (skb_is_combined) {

		/* once combined skb is processed, split the skbs again The

		 * length to split at is the same as length of first skb. Any