diff --git a/src/api/api_lib.c b/src/api/api_lib.c
index 8c519090..93c0e453 100644
--- a/src/api/api_lib.c
+++ b/src/api/api_lib.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/api/api_msg.c b/src/api/api_msg.c
index 3fb2dbbb..a05bb858 100644
--- a/src/api/api_msg.c
+++ b/src/api/api_msg.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/api/err.c b/src/api/err.c
index ea8b75a0..b582d88a 100644
--- a/src/api/err.c
+++ b/src/api/err.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/api/sockets.c b/src/api/sockets.c
index c39cf921..9ff2c0ed 100644
--- a/src/api/sockets.c
+++ b/src/api/sockets.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/api/tcpip.c b/src/api/tcpip.c
index e27dae0c..bdd35932 100644
--- a/src/api/tcpip.c
+++ b/src/api/tcpip.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/core/dhcp.c b/src/core/dhcp.c
index 2c3ae455..db832270 100644
--- a/src/core/dhcp.c
+++ b/src/core/dhcp.c
@@ -6,8 +6,8 @@
 
 /*
  *
- * Copyright (c) 2001-2003 Leon Woestenberg <leon.woestenberg@gmx.net>
- * Copyright (c) 2001-2003 Axon Digital Design B.V., The Netherlands.
+ * Copyright (c) 2001-2004 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -67,8 +67,6 @@
  * to remove the DHCP client.
  *
  */
-#ifdef LWIP_DHCP /* don't build if not configured for use in lwipopt.h */
-
 #include "lwip/stats.h"
 #include "lwip/mem.h"
 #include "lwip/udp.h"
@@ -1420,5 +1418,3 @@ static u32_t dhcp_get_option_long(u8_t *ptr)
   LWIP_DEBUGF(DHCP_DEBUG, ("option long value=%lu\n", value));
   return value;
 }
-
-#endif /* LWIP_DHCP */
diff --git a/src/core/inet.c b/src/core/inet.c
index a0243987..818f7ba9 100644
--- a/src/core/inet.c
+++ b/src/core/inet.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/core/inet6.c b/src/core/inet6.c
index 2a1931fe..c04915b7 100644
--- a/src/core/inet6.c
+++ b/src/core/inet6.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/core/ipv4/icmp.c b/src/core/ipv4/icmp.c
index 078100be..fbf5e7e5 100644
--- a/src/core/ipv4/icmp.c
+++ b/src/core/ipv4/icmp.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/core/ipv4/ip.c b/src/core/ipv4/ip.c
index 25862519..e39334a5 100644
--- a/src/core/ipv4/ip.c
+++ b/src/core/ipv4/ip.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -73,57 +73,6 @@ ip_init(void)
 {
 }
 
-/* ip_lookup:
- *
- * An experimental feature that will be changed in future versions. Do
- * not depend on it yet...
- */
-
-#ifdef LWIP_DEBUG
-u8_t
-ip_lookup(void *header, struct netif *inp)
-{
-  struct ip_hdr *iphdr;
-
-  iphdr = header;
-
-  /* not IP v4? */
-  if (IPH_V(iphdr) != 4) {
-    return 0;
-  }
-
-  /* Immediately accept/decline packets that are fragments or has
-     options. */
-#if IP_REASSEMBLY == 0
-  /*  if ((IPH_OFFSET(iphdr) & htons(IP_OFFMASK | IP_MF)) != 0) {
-    return 0;
-    }*/
-#endif /* IP_REASSEMBLY == 0 */
-
-#if IP_OPTIONS == 0
-  if (IPH_HL(iphdr) != 5) {
-    return 0;
-  }
-#endif /* IP_OPTIONS == 0 */
-
-  switch (IPH_PROTO(iphdr)) {
-#if LWIP_UDP
-  case IP_PROTO_UDP:
-  case IP_PROTO_UDPLITE:
-    return udp_lookup(iphdr, inp);
-#endif /* LWIP_UDP */
-#if LWIP_TCP
-  case IP_PROTO_TCP:
-    return 1;
-#endif /* LWIP_TCP */
-  case IP_PROTO_ICMP:
-    return 1;
-  default:
-    return 0;
-  }
-}
-#endif /* LWIP_DEBUG */
-
 /* ip_route:
  *
  * Finds the appropriate network interface for a given IP address. It
diff --git a/src/core/ipv4/ip_addr.c b/src/core/ipv4/ip_addr.c
index 83da77f7..d01420be 100644
--- a/src/core/ipv4/ip_addr.c
+++ b/src/core/ipv4/ip_addr.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/core/ipv4/ip_frag.c b/src/core/ipv4/ip_frag.c
index 141293ff..ab5e6503 100644
--- a/src/core/ipv4/ip_frag.c
+++ b/src/core/ipv4/ip_frag.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/core/ipv6/icmp6.c b/src/core/ipv6/icmp6.c
index 832e0417..a162758a 100644
--- a/src/core/ipv6/icmp6.c
+++ b/src/core/ipv6/icmp6.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/core/ipv6/ip6.c b/src/core/ipv6/ip6.c
index 00496f60..403e4de0 100644
--- a/src/core/ipv6/ip6.c
+++ b/src/core/ipv6/ip6.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/core/ipv6/ip6_addr.c b/src/core/ipv6/ip6_addr.c
index 1f6700d3..3e11e07e 100644
--- a/src/core/ipv6/ip6_addr.c
+++ b/src/core/ipv6/ip6_addr.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/core/mem.c b/src/core/mem.c
index 8f79a8d0..4f6c9217 100644
--- a/src/core/mem.c
+++ b/src/core/mem.c
@@ -5,7 +5,7 @@
  */
 
 /* 
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
@@ -292,7 +292,7 @@ mem_malloc(mem_size_t size)
       }
       sys_sem_signal(mem_sem);
       LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.",
-       (mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end);
+       (u32_t)mem + SIZEOF_STRUCT_MEM + size <= (u32_t)ram_end);
       LWIP_ASSERT("mem_malloc: allocated memory properly aligned.",
        (unsigned long)((u8_t *)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT == 0);
       return (u8_t *)mem + SIZEOF_STRUCT_MEM;
diff --git a/src/core/memp.c b/src/core/memp.c
index 739bce43..7eaf7bfc 100644
--- a/src/core/memp.c
+++ b/src/core/memp.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
@@ -217,7 +217,7 @@ memp_malloc(memp_t type)
     sys_sem_signal(mutex);
 #endif /* SYS_LIGHTWEIGHT_PROT */  
     LWIP_ASSERT("memp_malloc: memp properly aligned",
-     ((mem_ptr_t)MEM_ALIGN((u8_t *)memp + sizeof(struct memp)) % MEM_ALIGNMENT) == 0);
+     ((u32_t)MEM_ALIGN((u8_t *)memp + sizeof(struct memp)) % MEM_ALIGNMENT) == 0);
 
     mem = MEM_ALIGN((u8_t *)memp + sizeof(struct memp));
     return mem;
diff --git a/src/core/netif.c b/src/core/netif.c
index 3ae8307a..13632d4b 100644
--- a/src/core/netif.c
+++ b/src/core/netif.c
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -186,7 +186,7 @@ netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
         pcb = pcb->next;
       }
     }
-    for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
+    for (lpcb = tcp_listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
       /* PCB bound to current local interface address? */
       if (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr))) {
         /* The PCB is listening to the old ipaddr and
diff --git a/src/core/pbuf.c b/src/core/pbuf.c
index a04c617d..20843080 100644
--- a/src/core/pbuf.c
+++ b/src/core/pbuf.c
@@ -28,7 +28,7 @@
  */
 
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -100,7 +100,7 @@ pbuf_init(void)
   u16_t i;
 
   pbuf_pool = (struct pbuf *)&pbuf_pool_memory[0];
-  LWIP_ASSERT("pbuf_init: pool aligned", (mem_ptr_t)pbuf_pool % MEM_ALIGNMENT == 0);
+  LWIP_ASSERT("pbuf_init: pool aligned", (long)pbuf_pool % MEM_ALIGNMENT == 0);
 
 #if PBUF_STATS
   lwip_stats.pbuf.avail = PBUF_POOL_SIZE;
@@ -254,7 +254,7 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
     /* make the payload pointer point 'offset' bytes into pbuf data memory */
     p->payload = MEM_ALIGN((void *)((u8_t *)p + (sizeof(struct pbuf) + offset)));
     LWIP_ASSERT("pbuf_alloc: pbuf p->payload properly aligned",
-            ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0);
+            ((u32_t)p->payload % MEM_ALIGNMENT) == 0);
     /* the total length of the pbuf chain is the requested size */
     p->tot_len = length;
     /* set the length of the first pbuf in the chain */
@@ -290,7 +290,7 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
       q->len = rem_len > PBUF_POOL_BUFSIZE? PBUF_POOL_BUFSIZE: rem_len;
       q->payload = (void *)((u8_t *)q + sizeof(struct pbuf));
       LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned",
-              ((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0);
+              ((u32_t)q->payload % MEM_ALIGNMENT) == 0);
       q->ref = 1;
       /* calculate remaining length to be allocated */
       rem_len -= q->len;
@@ -314,7 +314,7 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
     p->flags = PBUF_FLAG_RAM;
 
     LWIP_ASSERT("pbuf_alloc: pbuf->payload properly aligned",
-           ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0);
+           ((u32_t)p->payload % MEM_ALIGNMENT) == 0);
     break;
   /* pbuf references existing (static constant) ROM payload? */
   case PBUF_ROM:
diff --git a/src/core/raw.c b/src/core/raw.c
index 7e3aa41d..c4c69e54 100644
--- a/src/core/raw.c
+++ b/src/core/raw.c
@@ -4,7 +4,7 @@
  *
  */
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/core/stats.c b/src/core/stats.c
index 85ebda4d..85a55b9e 100644
--- a/src/core/stats.c
+++ b/src/core/stats.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/core/sys.c b/src/core/sys.c
index cc4aaf07..657d72a8 100644
--- a/src/core/sys.c
+++ b/src/core/sys.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/core/tcp.c b/src/core/tcp.c
index a7ca9228..8c67650e 100644
--- a/src/core/tcp.c
+++ b/src/core/tcp.c
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
@@ -62,9 +62,7 @@ const u8_t tcp_backoff[13] =
     { 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7};
 
 /* The TCP PCB lists. */
-
-/* List of all TCP PCBs in LISTEN state. */
-union tcp_listen_pcbs_t tcp_listen_pcbs;
+struct tcp_pcb_listen *tcp_listen_pcbs;  /* List of all TCP PCBs in LISTEN state. */
 struct tcp_pcb *tcp_active_pcbs;  /* List of all TCP PCBs that are in a
          state in which they accept or send
          data. */
@@ -87,7 +85,7 @@ void
 tcp_init(void)
 {
   /* Clear globals. */
-  tcp_listen_pcbs.listen_pcbs = NULL;
+  tcp_listen_pcbs = NULL;
   tcp_active_pcbs = NULL;
   tcp_tw_pcbs = NULL;
   tcp_tmp_pcb = NULL;
@@ -138,7 +136,7 @@ tcp_close(struct tcp_pcb *pcb)
   switch (pcb->state) {
   case LISTEN:
     err = ERR_OK;
-    tcp_pcb_remove((struct tcp_pcb **)&tcp_listen_pcbs.pcbs, pcb);
+    tcp_pcb_remove((struct tcp_pcb **)&tcp_listen_pcbs, pcb);
     memp_free(MEMP_TCP_PCB_LISTEN, pcb);
     pcb = NULL;
     break;
@@ -253,7 +251,7 @@ tcp_bind(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
   }
 #ifndef SO_REUSE
   /* Check if the address already is in use. */
-  for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs;
+  for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs;
       cpcb != NULL; cpcb = cpcb->next) {
     if (cpcb->local_port == port) {
       if (ip_addr_isany(&(cpcb->local_ip)) ||
@@ -286,7 +284,7 @@ tcp_bind(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
   
   When the two options aren't set and specified port is already bound, ERR_USE is returned saying that 
   address is already in use. */
-  for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; cpcb != NULL; cpcb = cpcb->next) {
+  for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs; cpcb != NULL; cpcb = cpcb->next) {
     if(cpcb->local_port == port) {
       if(ip_addr_cmp(&(cpcb->local_ip), ipaddr)) {
         if(pcb->so_options & SOF_REUSEPORT) {
@@ -423,7 +421,7 @@ tcp_listen(struct tcp_pcb *pcb)
 #if LWIP_CALLBACK_API
   lpcb->accept = tcp_accept_null;
 #endif /* LWIP_CALLBACK_API */
-  TCP_REG(&tcp_listen_pcbs.listen_pcbs, lpcb);
+  TCP_REG(&tcp_listen_pcbs, lpcb);
   return (struct tcp_pcb *)lpcb;
 }
 
@@ -485,7 +483,7 @@ tcp_new_port(void)
       goto again;
     }
   }
-  for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) {
+  for(pcb = (struct tcp_pcb *)tcp_listen_pcbs; pcb != NULL; pcb = pcb->next) {
     if (pcb->local_port == port) {
       goto again;
     }
@@ -1255,7 +1253,7 @@ tcp_debug_print_pcbs(void)
     tcp_debug_print_state(pcb->state);
   }    
   LWIP_DEBUGF(TCP_DEBUG, ("Listen PCB states:\n"));
-  for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) {
+  for(pcb = (struct tcp_pcb *)tcp_listen_pcbs; pcb != NULL; pcb = pcb->next) {
     LWIP_DEBUGF(TCP_DEBUG, ("Local port %u, foreign port %u snd_nxt %lu rcv_nxt %lu ",
                        pcb->local_port, pcb->remote_port,
                        pcb->snd_nxt, pcb->rcv_nxt));
diff --git a/src/core/tcp_in.c b/src/core/tcp_in.c
index 6727a3b0..8260c22a 100644
--- a/src/core/tcp_in.c
+++ b/src/core/tcp_in.c
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -255,7 +255,7 @@ tcp_input(struct pbuf *p, struct netif *inp)
   /* Finally, if we still did not get a match, we check all PCBs that
      are LISTENing for incoming connections. */
     prev = NULL;
-    for(lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
+    for(lpcb = tcp_listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
       if ((ip_addr_isany(&(lpcb->local_ip)) ||
     ip_addr_cmp(&(lpcb->local_ip), &(iphdr->dest))) &&
    lpcb->local_port == tcphdr->dest) {
@@ -265,9 +265,9 @@ tcp_input(struct pbuf *p, struct netif *inp)
   if (prev != NULL) {
     ((struct tcp_pcb_listen *)prev)->next = lpcb->next;
           /* our successor is the remainder of the listening list */
-    lpcb->next = tcp_listen_pcbs.listen_pcbs;
+    lpcb->next = tcp_listen_pcbs;
           /* put this listening pcb at the head of the listening list */
-    tcp_listen_pcbs.listen_pcbs = lpcb;
+    tcp_listen_pcbs = lpcb;
   }
 
   LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packed for LISTENing connection.\n"));
diff --git a/src/core/tcp_out.c b/src/core/tcp_out.c
index fbfc831b..70838947 100644
--- a/src/core/tcp_out.c
+++ b/src/core/tcp_out.c
@@ -4,7 +4,7 @@
  * Transmission Control Protocol, outgoing traffic
  */
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
diff --git a/src/core/udp.c b/src/core/udp.c
index 292ff690..a95cb770 100644
--- a/src/core/udp.c
+++ b/src/core/udp.c
@@ -4,7 +4,7 @@
  *
  */
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -71,76 +71,6 @@ udp_init(void)
   udp_pcbs = pcb_cache = NULL;
 }
 
-
-/* udp_lookup:
- *
- * An experimental feature that will be changed in future versions. Do
- * not depend on it yet...
- */
-
-#ifdef LWIP_DEBUG
-u8_t
-udp_lookup(struct ip_hdr *iphdr, struct netif *inp)
-{
-  struct udp_pcb *pcb;
-  struct udp_hdr *udphdr;
-  u16_t src, dest;
-
-    PERF_START;
-  (void)inp;
-
-    udphdr = (struct udp_hdr *)(u8_t *)iphdr + IPH_HL(iphdr) * 4;
-
-  src = ntohs(udphdr->src);
-  dest = ntohs(udphdr->dest);
-
-    pcb = pcb_cache;
-  if (pcb != NULL &&
-    pcb->remote_port == src &&
-    pcb->local_port == dest &&
-    (ip_addr_isany(&pcb->remote_ip) ||
-    ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src))) &&
-    (ip_addr_isany(&pcb->local_ip) ||
-    ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) {
-    return 1;
-  }
-  else {
-    for(pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) {
-      if (pcb->remote_port == src &&
-   pcb->local_port == dest &&
-   (ip_addr_isany(&pcb->remote_ip) ||
-    ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src))) &&
-   (ip_addr_isany(&pcb->local_ip) ||
-    ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) {
-  pcb_cache = pcb;
-        break;
-        }
-    }
-
-    if (pcb == NULL) {
-      for(pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) {
-  if (pcb->remote_port == 0 &&
-     pcb->local_port == dest &&
-     (ip_addr_isany(&pcb->remote_ip) ||
-      ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src))) &&
-     (ip_addr_isany(&pcb->local_ip) ||
-      ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) {
-        break;
-        }
-      }
-    }
-  }
-
-  PERF_STOP("udp_lookup");
-
-  if (pcb != NULL) {
-    return 1;
-  }
-  else {
-    return 1;
-  }
-}
-#endif /* LWIP_DEBUG */
 /**
  * Process an incoming UDP datagram.
  *
diff --git a/src/netif/etharp.c b/src/netif/etharp.c
index ebbabfbc..8d34923b 100644
--- a/src/netif/etharp.c
+++ b/src/netif/etharp.c
@@ -11,7 +11,7 @@
  */
 
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -372,20 +372,22 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
 #if ARP_QUEUEING
         /* get the first packet on the queue (if any) */
         p = arp_table[i].p;
-        /* queued packet present? */
+        /* (another) queued packet present? */
         while (p != NULL) {
           struct pbuf *q, *n;
           /* search for second packet on queue (n) */
           q = p;
           while (q->tot_len > q->len) {
-          	/* proceed to next pbuf of this packet */
-          	LWIP_ASSERT("q->next ! NULL", q->next != NULL);
-          	q = q->next;
+            LWIP_ASSERT("q->next != NULL (while q->tot_len > q->len)", q->next != NULL);
+            /* proceed to next pbuf of this packet */
+            q = q->next;
           }
-          /* { q = last pbuf of first packet, q->tot_len = q->len } */
+          /* { q = last pbuf of this packet, q->tot_len == q->len } */
+          LWIP_ASSERT("q->tot_len == q->len", q->tot_len == q->len);
+          /* remember next packet on queue */
           n = q->next;
-          /* { n = first pbuf of 2nd packet, or NULL if no 2nd packet } */
-          /* terminate the first packet pbuf chain */
+          /* { n = first pbuf of next packet, or NULL if no next packet } */
+          /* terminate this packet pbuf chain */
           q->next = NULL;
           /* fill-in Ethernet header */
           ethhdr = p->payload;
@@ -394,7 +396,7 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
             ethhdr->src.addr[k] = netif->hwaddr[k];
           }
           ethhdr->type = htons(ETHTYPE_IP);
-          LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: sending queued IP packet %p.\n",(void *)p));
+          LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("update_arp_entry: sending queued IP packet %p.\n", (void *)p));
           /* send the queued IP packet */
           netif->linkoutput(netif, p);
           /* free the queued IP packet */
@@ -405,10 +407,11 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
         /* NULL attached buffer*/
         arp_table[i].p = NULL;
 #endif
+        /* IP addresses should only occur once in the ARP entry, we are done */
         return NULL;
       }
-    } /* if */
-  } /* for */
+    } /* if STABLE */
+  } /* for all ARP entries */
 
   /* no matching ARP entry was found */
   LWIP_ASSERT("update_arp_entry: i == ARP_TABLE_SIZE", i == ARP_TABLE_SIZE);
@@ -582,7 +585,7 @@ etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
     /* ARP reply. We insert or update the ARP table later. */
     LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_arp_input: incoming ARP reply\n"));
 #if (LWIP_DHCP && DHCP_DOES_ARP_CHECK)
-    /* DHCP needs to know about ARP replies to our address */
+    /* DHCP wants to know about ARP replies to our wanna-have-address */
     if (for_us) dhcp_arp_reply(netif, &hdr->sipaddr);
 #endif
     break;
diff --git a/src/netif/ethernetif.c b/src/netif/ethernetif.c
index 557c00c6..f024661d 100644
--- a/src/netif/ethernetif.c
+++ b/src/netif/ethernetif.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/netif/loopif.c b/src/netif/loopif.c
index 9e7c03a0..f5bcc07c 100644
--- a/src/netif/loopif.c
+++ b/src/netif/loopif.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
diff --git a/src/netif/ppp/auth.c b/src/netif/ppp/auth.c
index 45001336..33349640 100644
--- a/src/netif/ppp/auth.c
+++ b/src/netif/ppp/auth.c
@@ -610,7 +610,7 @@ int get_secret(
     
     addrs = NULL;
 
-    if(!client || !client[0] && strcmp(client, ppp_settings.user)) {
+    if(!client || !client[0] || strcmp(client, ppp_settings.user)) {
 	return 0;
     }
 
diff --git a/src/netif/ppp/chpms.h b/src/netif/ppp/chpms.h
index ea4f8b34..c5844721 100644
--- a/src/netif/ppp/chpms.h
+++ b/src/netif/ppp/chpms.h
@@ -51,7 +51,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: chpms.h,v 1.2 2003/11/14 14:56:31 likewise Exp $
+ * $Id: chpms.h,v 1.3 2004/02/07 00:30:03 likewise Exp $
  */
 
 #ifndef CHPMS_H
diff --git a/src/netif/ppp/vj.h b/src/netif/ppp/vj.h
index fb080936..71720814 100644
--- a/src/netif/ppp/vj.h
+++ b/src/netif/ppp/vj.h
@@ -1,7 +1,7 @@
 /*
  * Definitions for tcp compression routines.
  *
- * $Id: vj.h,v 1.3 2003/11/14 14:56:31 likewise Exp $
+ * $Id: vj.h,v 1.4 2004/02/07 00:30:03 likewise Exp $
  *
  * Copyright (c) 1989 Regents of the University of California.
  * All rights reserved.
diff --git a/src/netif/slipif.c b/src/netif/slipif.c
index 97618517..b349d82c 100644
--- a/src/netif/slipif.c
+++ b/src/netif/slipif.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  * All rights reserved. 
  *
  * Redistribution and use in source and binary forms, with or without