Change in osmo-msc[master]: libmsc/gsm_04_11.c: refactor RP-DATA header validation

[Vadim Yanitskiy]

Vadim Yanitskiy has uploaded this change for review. ( https://gerrit.osmocom.org/11915


Change subject: libmsc/gsm_04_11.c: refactor RP-DATA header validation
......................................................................

libmsc/gsm_04_11.c: refactor RP-DATA header validation

It's much better to have both RP-DATA header parsing and validation
code in a single function. There is no need to pass all the header
fields (DA, OA, UI) to gsm411_rx_rp_ud() because they are not
used there.

Change-Id: Iaf295949148e2a613c5403d1f7a926fcd6849c15
---
M src/libmsc/gsm_04_11.c
1 file changed, 18 insertions(+), 20 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/15/11915/1

diff --git a/src/libmsc/gsm_04_11.c b/src/libmsc/gsm_04_11.c
index 4d43b57..14f9f57 100644
--- a/src/libmsc/gsm_04_11.c
+++ b/src/libmsc/gsm_04_11.c
@@ -587,27 +587,10 @@
 
 /* Receive a 04.11 TPDU inside RP-DATA / user data */
 static int gsm411_rx_rp_ud(struct msgb *msg, struct gsm_trans *trans,
-			  struct gsm411_rp_hdr *rph,
-			  uint8_t src_len, uint8_t *src,
-			  uint8_t dst_len, uint8_t *dst,
-			  uint8_t tpdu_len, uint8_t *tpdu)
+			  struct gsm411_rp_hdr *rph)
 {
 	int rc = 0;
 
-	if (src_len && src)
-		LOGP(DLSMS, LOGL_ERROR, "RP-DATA (MO) with SRC ?!?\n");
-
-	if (!dst_len || !dst || !tpdu_len || !tpdu) {
-		LOGP(DLSMS, LOGL_ERROR,
-			"RP-DATA (MO) without DST or TPDU ?!?\n");
-		gsm411_send_rp_error(trans, rph->msg_ref,
-				     GSM411_RP_CAUSE_INV_MAND_INF);
-		return -EIO;
-	}
-	msg->l4h = tpdu;
-
-	DEBUGP(DLSMS, "DST(%u,%s)\n", dst_len, osmo_hexdump(dst, dst_len));
-
 	rc = gsm340_rx_tpdu(trans, msg, rph->msg_ref);
 	if (rc == 0)
 		return gsm411_send_rp_ack(trans, rph->msg_ref);
@@ -639,8 +622,23 @@
 
 	DEBUGP(DLSMS, "RX_RP-DATA: src_len=%u, dst_len=%u ud_len=%u\n",
 		src_len, dst_len, rpud_len);
-	return gsm411_rx_rp_ud(msg, trans, rph, src_len, src, dst_len, dst,
-				rpud_len, rp_ud);
+
+	if (src_len && src)
+		LOGP(DLSMS, LOGL_ERROR, "RP-DATA (MO) with SRC ?!?\n");
+
+	if (!dst_len || !dst || !rpud_len || !rp_ud) {
+		LOGP(DLSMS, LOGL_ERROR,
+			"RP-DATA (MO) without DST or TPDU ?!?\n");
+		gsm411_send_rp_error(trans, rph->msg_ref,
+				     GSM411_RP_CAUSE_INV_MAND_INF);
+		return -EIO;
+	}
+
+	msg->l4h = rp_ud;
+
+	DEBUGP(DLSMS, "DST(%u,%s)\n", dst_len, osmo_hexdump(dst, dst_len));
+
+	return gsm411_rx_rp_ud(msg, trans, rph);
 }
 
 static struct gsm_sms *sms_report_alloc(struct gsm_sms *sms)

-- 
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Iaf295949148e2a613c5403d1f7a926fcd6849c15
Gerrit-Change-Number: 11915
Gerrit-PatchSet: 1
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
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