added more missing casts

src/api/sockets.c

@@ -2347,7 +2347,7 @@ lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_
         return EINVAL;
       } else {
         sock->conn->pcb.raw->chksum_reqd = 1;
-        sock->conn->pcb.raw->chksum_offset = *(const int *)optval;
+        sock->conn->pcb.raw->chksum_offset = (u16_t)*(const int *)optval;
       }
       LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_RAW, IPV6_CHECKSUM, ..) -> %d\n",
                   s, sock->conn->pcb.raw->chksum_reqd));

src/core/dns.c

@@ -276,7 +276,7 @@ DNS_LOCAL_HOSTLIST_STORAGE_PRE struct local_hostlist_entry local_hostlist_static
 
 #endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
 
-static void dns_init_local();
+static void dns_init_local(void);
 #endif /* DNS_LOCAL_HOSTLIST */
 
 
@@ -422,7 +422,7 @@ dns_tmr(void)
 
 #if DNS_LOCAL_HOSTLIST
 static void
-dns_init_local()
+dns_init_local(void)
 {
 #if DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT)
   int i;

src/core/ipv6/ip6_frag.c

@@ -150,7 +150,7 @@ ip6_reass_free_complete_datagram(struct ip6_reassdata *ipr)
     p = ipr->p;
     ipr->p = iprh->next_pbuf;
     /* Then, move back to the original header (we are now pointing to Fragment header). */
-    if (pbuf_header(p, (u8_t*)p->payload - (u8_t*)ipr->iphdr)) {
+    if (pbuf_header(p, (s16_t)((u8_t*)p->payload - (u8_t*)ipr->iphdr))) {
       LWIP_ASSERT("ip6_reass_free: moving p->payload to ip6 header failed\n", 0);
     }
     else {
@@ -264,7 +264,7 @@ ip6_reass(struct pbuf *p)
    * Adjust for headers before Fragment Header.
    * And finally adjust by Fragment Header length. */
   len = ntohs(ip6_current_header()->_plen);
-  len -= ((u8_t*)p->payload - (u8_t*)ip6_current_header()) - IP6_HLEN;
+  len -= (u16_t)(((u8_t*)p->payload - (u8_t*)ip6_current_header()) - IP6_HLEN);
   len -= IP6_FRAG_HLEN;
 
   /* Look for the datagram the fragment belongs to in the current datagram queue,
@@ -494,9 +494,9 @@ ip6_reass(struct pbuf *p)
     }
 
     /* Adjust datagram length by adding header lengths. */
-    ipr->datagram_len += ((u8_t*)ipr->p->payload - (u8_t*)ipr->iphdr)
+    ipr->datagram_len += (u16_t)(((u8_t*)ipr->p->payload - (u8_t*)ipr->iphdr)
                          + IP6_FRAG_HLEN
-                         - IP6_HLEN ;
+                         - IP6_HLEN);
 
     /* Set payload length in ip header. */
     ipr->iphdr->_plen = htons(ipr->datagram_len);
@@ -528,7 +528,7 @@ ip6_reass(struct pbuf *p)
     ip6_reass_pbufcount -= pbuf_clen(p);
 
     /* Move pbuf back to IPv6 header. */
-    if (pbuf_header(p, (u8_t*)p->payload - iphdr_ptr)) {
+    if (pbuf_header(p, (s16_t)((u8_t*)p->payload - iphdr_ptr))) {
       LWIP_ASSERT("ip6_reass: moving p->payload to ip6 header failed\n", 0);
       pbuf_free(p);
       return NULL;

src/core/ipv6/nd6.c

@@ -470,7 +470,7 @@ nd6_input(struct pbuf *p, struct netif *inp)
         mtu_opt = (struct mtu_option *)buffer;
         if (htonl(mtu_opt->mtu) >= 1280) {
 #if LWIP_ND6_ALLOW_RA_UPDATES
-          inp->mtu = htonl(mtu_opt->mtu);
+          inp->mtu = (u16_t)htonl(mtu_opt->mtu);
 #endif /* LWIP_ND6_ALLOW_RA_UPDATES */
         }
         break;
@@ -603,6 +603,7 @@ nd6_input(struct pbuf *p, struct netif *inp)
   {
     struct icmp6_hdr *icmp6hdr; /* Packet too big message */
     struct ip6_hdr * ip6hdr; /* IPv6 header of the packet which caused the error */
+    u32_t pmtu;
 
     /* Check that ICMPv6 header + IPv6 header fit in payload */
     if (p->len < (sizeof(struct icmp6_hdr) + IP6_HLEN)) {
@@ -628,7 +629,8 @@ nd6_input(struct pbuf *p, struct netif *inp)
     }
 
     /* Change the Path MTU. */
-    destination_cache[i].pmtu = htonl(icmp6hdr->data);
+    pmtu = htonl(icmp6hdr->data);
+    destination_cache[i].pmtu = (u16_t)LWIP_MIN(pmtu, 0xFFFF);
 
     break; /* ICMP6_TYPE_PTB */
   }
@@ -866,7 +868,7 @@ nd6_send_ns(struct netif * netif, const ip6_addr_t * target_addr, u8_t flags)
   ip6_addr_set(&(ns_hdr->target_address), target_addr);
 
   lladdr_opt->type = ND6_OPTION_TYPE_SOURCE_LLADDR;
-  lladdr_opt->length = lladdr_opt_len;
+  lladdr_opt->length = (u8_t)lladdr_opt_len;
   SMEMCPY(lladdr_opt->addr, netif->hwaddr, netif->hwaddr_len);
 
   /* Generate the solicited node address for the target address. */
@@ -935,7 +937,7 @@ nd6_send_na(struct netif * netif, const ip6_addr_t * target_addr, u8_t flags)
   ip6_addr_set(&(na_hdr->target_address), target_addr);
 
   lladdr_opt->type = ND6_OPTION_TYPE_TARGET_LLADDR;
-  lladdr_opt->length = lladdr_opt_len;
+  lladdr_opt->length = (u8_t)lladdr_opt_len;
   SMEMCPY(lladdr_opt->addr, netif->hwaddr, netif->hwaddr_len);
 
   /* Generate the solicited node address for the target address. */
@@ -1016,7 +1018,7 @@ nd6_send_rs(struct netif * netif)
     /* Include our hw address. */
     lladdr_opt = (struct lladdr_option *)((u8_t*)p->payload + sizeof(struct rs_header));
     lladdr_opt->type = ND6_OPTION_TYPE_SOURCE_LLADDR;
-    lladdr_opt->length = lladdr_opt_len;
+    lladdr_opt->length = (u8_t)lladdr_opt_len;
     SMEMCPY(lladdr_opt->addr, netif->hwaddr, netif->hwaddr_len);
   }
 

src/core/udp.c

@@ -72,7 +72,7 @@
    "The Dynamic and/or Private Ports are those from 49152 through 65535" */
 #define UDP_LOCAL_PORT_RANGE_START  0xc000
 #define UDP_LOCAL_PORT_RANGE_END    0xffff
-#define UDP_ENSURE_LOCAL_PORT_RANGE(port) (((port) & ~UDP_LOCAL_PORT_RANGE_START) + UDP_LOCAL_PORT_RANGE_START)
+#define UDP_ENSURE_LOCAL_PORT_RANGE(port) ((u16_t)(((port) & ~UDP_LOCAL_PORT_RANGE_START) + UDP_LOCAL_PORT_RANGE_START))
 #endif
 
 /* last local UDP port */
@@ -1161,7 +1161,7 @@ void udp_netif_ipv4_addr_changed(const ip4_addr_t* old_addr, const ip4_addr_t* n
   if (!ip4_addr_isany(new_addr)) {
     for (upcb = udp_pcbs; upcb != NULL; upcb = upcb->next) {
       /* Is this an IPv4 pcb? */
-      if (!IP_IS_V6_VAL(&upcb->local_ip)) {
+      if (!IP_IS_V6_VAL(upcb->local_ip)) {
         /* PCB bound to current local interface address? */
         if (!ip4_addr_isany(ip_2_ip4(&upcb->local_ip)) &&
             ip4_addr_cmp(ip_2_ip4(&upcb->local_ip), old_addr)) {