net: pkt: Corrected data length appended in net_pkt_append()

nxa22042 · Anas Nashif · commit 26f43950f2d4 · 2017-11-28T12:30:01.000-05:00
The maximum data length that can be appended using net_pkt_append()
should be set to TCP send_mss only if it is smaller than allowed
payload length in net_pkt.

Signed-off-by: Vakul Garg &lt;vakul.garg@nxp.com&gt;
diff --git a/subsys/net/ip/net_pkt.c b/subsys/net/ip/net_pkt.c
@@ -1225,7 +1225,7 @@ u16_t net_pkt_append(struct net_pkt *pkt, u16_t len, const u8_t *data,
 		max_len = pkt->data_len;
 
 #if defined(CONFIG_NET_TCP)
-		if (ctx->tcp) {
+		if (ctx->tcp && (ctx->tcp->send_mss < max_len)) {
 			max_len = ctx->tcp->send_mss;
 		}
 #endif

Original file line number	Diff line number	Diff line change
`@@ -1225,7 +1225,7 @@ u16_t net_pkt_append(struct net_pkt pkt, u16_t len, const u8_t data,`
`1225`	`1225`	`max_len = pkt->data_len;`
`1226`	`1226`
`1227`	`1227`	`#if defined(CONFIG_NET_TCP)`
`1228`		`- if (ctx->tcp) {`
	`1228`	`+ if (ctx->tcp && (ctx->tcp->send_mss < max_len)) {`
`1229`	`1229`	`max_len = ctx->tcp->send_mss;`
`1230`	`1230`	`}`
`1231`	`1231`	`#endif`