From ee2d01ed882430a08368abb49ef5409e78a01361 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Mon, 24 Aug 2015 08:49:51 +0200
Subject: [PATCH] fix compiler warnings when passing u16_t to pbuf_header()

---
 src/core/ipv6/ip6.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/core/ipv6/ip6.c b/src/core/ipv6/ip6.c
index f4bc4af5..eb9bd700 100644
--- a/src/core/ipv6/ip6.c
+++ b/src/core/ipv6/ip6.c
@@ -589,7 +589,7 @@ netif_found:
         goto ip6_input_cleanup;
       }
 
-      pbuf_header(p, -hlen);
+      pbuf_header(p, -(s16_t)hlen);
       break;
     case IP6_NEXTH_DESTOPTS:
       LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Destination options header\n"));
@@ -612,7 +612,7 @@ netif_found:
         goto ip6_input_cleanup;
       }
 
-      pbuf_header(p, -hlen);
+      pbuf_header(p, -(s16_t)hlen);
       break;
     case IP6_NEXTH_ROUTING:
       LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with Routing header\n"));
@@ -635,7 +635,7 @@ netif_found:
         goto ip6_input_cleanup;
       }
 
-      pbuf_header(p, -hlen);
+      pbuf_header(p, -(s16_t)hlen);
       break;
 
     case IP6_NEXTH_FRAGMENT:
@@ -669,7 +669,7 @@ netif_found:
            PP_HTONS(IP6_FRAG_OFFSET_MASK | IP6_FRAG_MORE_FLAG)) == 0) {
         /* This is a 1-fragment packet, usually a packet that we have
          * already reassembled. Skip this header anc continue. */
-        pbuf_header(p, -hlen);
+        pbuf_header(p, -(s16_t)hlen);
       } else {
 #if LWIP_IPV6_REASS
 
@@ -729,21 +729,21 @@ options_done:
     case IP6_NEXTH_UDPLITE:
 #endif /* LWIP_UDPLITE */
       /* Point to payload. */
-      pbuf_header(p, -ip_data.current_ip_header_tot_len);
+      pbuf_header(p, -(s16_t)ip_data.current_ip_header_tot_len);
       udp_input(p, inp);
       break;
 #endif /* LWIP_UDP */
 #if LWIP_TCP
     case IP6_NEXTH_TCP:
       /* Point to payload. */
-      pbuf_header(p, -ip_data.current_ip_header_tot_len);
+      pbuf_header(p, -(s16_t)ip_data.current_ip_header_tot_len);
       tcp_input(p, inp);
       break;
 #endif /* LWIP_TCP */
 #if LWIP_ICMP6
     case IP6_NEXTH_ICMP6:
       /* Point to payload. */
-      pbuf_header(p, -ip_data.current_ip_header_tot_len);
+      pbuf_header(p, -(s16_t)ip_data.current_ip_header_tot_len);
       icmp6_input(p, inp);
       break;
 #endif /* LWIP_ICMP */