diff --git a/src/core/ipv4/icmp.c b/src/core/ipv4/icmp.c
index 330d41fc..6eaed5e8 100644
--- a/src/core/ipv4/icmp.c
+++ b/src/core/ipv4/icmp.c
@@ -42,9 +42,7 @@
 
 #include "lwip/stats.h"
 
-#if LWIP_SNMP > 0
-#  include "snmp.h"
-#endif
+#include "snmp.h"
 /*-----------------------------------------------------------------------------------*/
 void
 icmp_input(struct pbuf *p, struct netif *inp)
@@ -58,9 +56,7 @@ icmp_input(struct pbuf *p, struct netif *inp)
 #ifdef ICMP_STATS
   ++lwip_stats.icmp.recv;
 #endif /* ICMP_STATS */
-#if LWIP_SNMP > 0
   snmp_inc_icmpinmsgs();
-#endif
 
   
   iphdr = p->payload;
@@ -88,9 +84,7 @@ icmp_input(struct pbuf *p, struct netif *inp)
 #ifdef ICMP_STATS
       ++lwip_stats.icmp.lenerr;
 #endif /* ICMP_STATS */
-#if LWIP_SNMP > 0
       snmp_inc_icmpinerrors();
-#endif
 
       return;      
     }
@@ -101,9 +95,7 @@ icmp_input(struct pbuf *p, struct netif *inp)
 #ifdef ICMP_STATS
       ++lwip_stats.icmp.chkerr;
 #endif /* ICMP_STATS */
-#if LWIP_SNMP > 0
       snmp_inc_icmpinerrors();
-#endif
       return;
     }
     tmpaddr.addr = iphdr->src.addr;
@@ -119,12 +111,10 @@ icmp_input(struct pbuf *p, struct netif *inp)
 #ifdef ICMP_STATS
     ++lwip_stats.icmp.xmit;
 #endif /* ICMP_STATS */
-#if LWIP_SNMP > 0
     /* increase number of messages attempted to send */
     snmp_inc_icmpoutmsgs();
     /* increase number of echo replies attempted to send */
     snmp_inc_icmpoutechoreps();
-#endif
 
     pbuf_header(p, hlen);
     ip_output_if(p, &(iphdr->src), IP_HDRINCL,
@@ -164,12 +154,10 @@ icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
 #ifdef ICMP_STATS
   ++lwip_stats.icmp.xmit;
 #endif /* ICMP_STATS */
-#if LWIP_SNMP > 0
   /* increase number of messages attempted to send */
   snmp_inc_icmpoutmsgs();
   /* increase number of destination unreachable messages attempted to send */
   snmp_inc_icmpoutdestunreachs();
-#endif
 
   ip_output(q, NULL, &(iphdr->src),
 	    ICMP_TTL, IP_PROTO_ICMP);
@@ -208,12 +196,10 @@ icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
 #ifdef ICMP_STATS
   ++lwip_stats.icmp.xmit;
 #endif /* ICMP_STATS */
-#if LWIP_SNMP > 0
   /* increase number of messages attempted to send */
   snmp_inc_icmpoutmsgs();
   /* increase number of destination unreachable messages attempted to send */
   snmp_inc_icmpouttimeexcds();
-#endif
   ip_output(q, NULL, &(iphdr->src),
 	    ICMP_TTL, IP_PROTO_ICMP);
   pbuf_free(q);
diff --git a/src/core/ipv4/ip.c b/src/core/ipv4/ip.c
index e96ac1f8..f03a6df7 100644
--- a/src/core/ipv4/ip.c
+++ b/src/core/ipv4/ip.c
@@ -55,9 +55,7 @@
 
 #include "arch/perf.h"
 
-#if LWIP_SNMP > 0
-#  include "snmp.h"
-#endif
+#include "snmp.h"
 #if LWIP_DHCP
 #include "lwip/dhcp.h"
 #endif /* LWIP_DHCP */
@@ -169,18 +167,14 @@ ip_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp)
   if(netif == NULL) {
     DEBUGF(IP_DEBUG, ("ip_forward: no forwarding route for 0x%lx found\n",
 		      iphdr->dest.addr));
-#if LWIP_SNMP > 0
     snmp_inc_ipnoroutes();
-#endif
     return;
   }
   /* Do not forward packets onto the same network interface on which
      they arrived. */
   if(netif == inp) {
     DEBUGF(IP_DEBUG, ("ip_forward: not bouncing packets back on incoming interface.\n"));
-#if LWIP_SNMP > 0
     snmp_inc_ipnoroutes();
-#endif
     return;
   }
   
@@ -191,9 +185,7 @@ ip_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp)
     /* Don't send ICMP messages in response to ICMP messages */
     if(IPH_PROTO(iphdr) != IP_PROTO_ICMP) {
       icmp_time_exceeded(p, ICMP_TE_TTL);
-#if LWIP_SNMP > 0
       snmp_inc_icmpouttimeexcds();
-#endif
     }
     return;       
   }
@@ -212,9 +204,7 @@ ip_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp)
   ++lwip_stats.ip.fw;
   ++lwip_stats.ip.xmit;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipforwdatagrams();
-#endif
 
   PERF_STOP("ip_forward");
   /* transmit pbuf on chosen interface */
@@ -242,9 +232,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
 #ifdef IP_STATS
   ++lwip_stats.ip.recv;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
-    snmp_inc_ipinreceives();
-#endif
+  snmp_inc_ipinreceives();
 
   /* identify the IP header */
   iphdr = p->payload;
@@ -258,9 +246,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
     ++lwip_stats.ip.err;
     ++lwip_stats.ip.drop;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipunknownprotos();
-#endif
     return ERR_OK;
   }
   /* obtain IP header length in number of 32-bit words */
@@ -278,9 +264,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
     ++lwip_stats.ip.lenerr;
     ++lwip_stats.ip.drop;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipindiscards();
-#endif
     return ERR_OK;
   }
 
@@ -296,9 +280,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
     ++lwip_stats.ip.chkerr;
     ++lwip_stats.ip.drop;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipindiscards();
-#endif
     return ERR_OK;
   }
   
@@ -361,9 +343,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
     else
 #endif /* IP_FORWARD */
     {
-#if LWIP_SNMP > 0
       snmp_inc_ipindiscards();
-#endif
     }
     pbuf_free(p);
     return ERR_OK;
@@ -387,9 +367,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
     ++lwip_stats.ip.opterr;
     ++lwip_stats.ip.drop;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipunknownprotos();
-#endif
     return ERR_OK;
   }
 #endif /* IP_REASSEMBLY */
@@ -402,9 +380,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
     ++lwip_stats.ip.opterr;
     ++lwip_stats.ip.drop;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipunknownprotos();
-#endif
     return ERR_OK;
   }  
 #endif /* IP_OPTIONS == 0 */
@@ -419,24 +395,18 @@ ip_input(struct pbuf *p, struct netif *inp) {
   switch(IPH_PROTO(iphdr)) {
 #if LWIP_UDP > 0    
   case IP_PROTO_UDP:
-#if LWIP_SNMP > 0
     snmp_inc_ipindelivers();
-#endif
     udp_input(p, inp);
     break;
 #endif /* LWIP_UDP */
 #if LWIP_TCP > 0    
   case IP_PROTO_TCP:
-#if LWIP_SNMP > 0
     snmp_inc_ipindelivers();
-#endif
     tcp_input(p, inp);
     break;
 #endif /* LWIP_TCP */
   case IP_PROTO_ICMP:
-#if LWIP_SNMP > 0
     snmp_inc_ipindelivers();
-#endif
     icmp_input(p, inp);
     break;
   default:
@@ -454,9 +424,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
     ++lwip_stats.ip.proterr;
     ++lwip_stats.ip.drop;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipunknownprotos();
-#endif
 
   }
   return ERR_OK;
@@ -479,10 +447,7 @@ ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
   static struct ip_hdr *iphdr;
   static u16_t ip_id = 0;
 
-  
-#if LWIP_SNMP > 0
-    snmp_inc_ipoutrequests();
-#endif
+  snmp_inc_ipoutrequests();
   
   if(dest != IP_HDRINCL) {
     if(pbuf_header(p, IP_HLEN)) {
@@ -491,9 +456,7 @@ ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
 #ifdef IP_STATS
       ++lwip_stats.ip.err;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
-    snmp_inc_ipoutdiscards();
-#endif
+      snmp_inc_ipoutdiscards();
       return ERR_BUF;
     }
     
@@ -560,9 +523,7 @@ ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
 #ifdef IP_STATS
     ++lwip_stats.ip.rterr;
 #endif /* IP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_ipoutdiscards();
-#endif
     return ERR_RTE;
   }
 
diff --git a/src/core/netif.c b/src/core/netif.c
index fa4cbbaa..c5846dc0 100644
--- a/src/core/netif.c
+++ b/src/core/netif.c
@@ -39,7 +39,17 @@
 struct netif *netif_list = NULL;
 struct netif *netif_default = NULL;
 
-/*-----------------------------------------------------------------------------------*/
+/**
+ * Add a network interface to the list of lwIP netifs.
+ *
+ * @param ipaddr IP address for the new netif
+ * @param netmask network mask for the new netif
+ * @param gw default gateway IP address for the new netif
+ * @init callback function that initializes the interface
+ * @input callback function that...
+ *
+ * @return netif, or NULL if failed.
+ */
 struct netif *
 netif_add(struct ip_addr *ipaddr, struct ip_addr *netmask,
 	  struct ip_addr *gw,
diff --git a/src/core/udp.c b/src/core/udp.c
index f267298c..d08b3879 100644
--- a/src/core/udp.c
+++ b/src/core/udp.c
@@ -28,7 +28,7 @@
  * 
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: udp.c,v 1.17 2003/02/06 22:18:56 davidhaas Exp $
+ * $Id: udp.c,v 1.18 2003/02/10 13:47:47 likewise Exp $
  */
 
 /*-----------------------------------------------------------------------------------*/
@@ -50,9 +50,7 @@
 #include "lwip/stats.h"
 
 #include "arch/perf.h"
-#if LWIP_SNMP > 0
-#  include "snmp.h"
-#endif
+#include "snmp.h"
 
 /*-----------------------------------------------------------------------------------*/
 
@@ -259,9 +257,7 @@ udp_input(struct pbuf *p, struct netif *inp)
 	++lwip_stats.udp.chkerr;
 	++lwip_stats.udp.drop;
 #endif /* UDP_STATS */
-#if LWIP_SNMP > 0
-    snmp_inc_udpinerrors();
-#endif
+  snmp_inc_udpinerrors();
 	pbuf_free(p);
 	goto end;
       }
@@ -276,9 +272,7 @@ udp_input(struct pbuf *p, struct netif *inp)
 	  ++lwip_stats.udp.chkerr;
 	  ++lwip_stats.udp.drop;
 #endif /* UDP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_udpinerrors();
-#endif
 	  pbuf_free(p);
 	  goto end;
 	}
@@ -286,10 +280,8 @@ udp_input(struct pbuf *p, struct netif *inp)
     }
     pbuf_header(p, -UDP_HLEN);    
     if(pcb != NULL) {
-#if LWIP_SNMP > 0
       snmp_inc_udpindatagrams();
-#endif
-      pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src), udphdr->src);
+      pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src), src);
     } else {
       DEBUGF(UDP_DEBUG, ("udp_input: not for us.\n"));
       
@@ -307,9 +299,7 @@ udp_input(struct pbuf *p, struct netif *inp)
       ++lwip_stats.udp.proterr;
       ++lwip_stats.udp.drop;
 #endif /* UDP_STATS */
-#if LWIP_SNMP > 0
     snmp_inc_udpnoports();
-#endif
       pbuf_free(p);
     }
   } else {
@@ -404,9 +394,7 @@ udp_send(struct udp_pcb *pcb, struct pbuf *p)
     if(udphdr->chksum == 0x0000) udphdr->chksum = 0xffff;
     /* output to IP */
     err = ip_output_if(p, src_ip, &pcb->remote_ip, UDP_TTL, IP_PROTO_UDPLITE, netif);    
-#if LWIP_SNMP > 0
     snmp_inc_udpoutdatagrams();
-#endif
   } else {
     DEBUGF(UDP_DEBUG, ("udp_send: UDP packet length %u\n", p->tot_len));
     udphdr->len = htons(p->tot_len);
@@ -417,9 +405,7 @@ udp_send(struct udp_pcb *pcb, struct pbuf *p)
       if(udphdr->chksum == 0x0000) udphdr->chksum = 0xffff;
     }
     DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum %x\n", udphdr->chksum));
-#if LWIP_SNMP > 0
     snmp_inc_udpoutdatagrams();
-#endif
     DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if(,,,,IP_PROTO_UDP,)\n"));
     /* output to IP */
     err = ip_output_if(p, src_ip, &pcb->remote_ip, UDP_TTL, IP_PROTO_UDP, netif);    
@@ -519,15 +505,15 @@ udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
   struct udp_pcb *ipcb;
 
   if(pcb->local_port == 0) {
-	  err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
-	  if(err != ERR_OK)
-		  return err;
+    err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
+    if(err != ERR_OK)
+      return err;
   }
 
   ip_addr_set(&pcb->remote_ip, ipaddr);
   pcb->remote_port = port;
+#if 1
   pcb->flags |= UDP_FLAGS_CONNECTED;
-
   /* Nail down local IP for netconn_addr()/getsockname() */
   if(ip_addr_isany(&pcb->local_ip) && !ip_addr_isany(&pcb->remote_ip)) { 
     struct netif *netif;
@@ -535,7 +521,7 @@ udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
     if((netif = ip_route(&(pcb->remote_ip))) == NULL) {
     	DEBUGF(UDP_DEBUG, ("udp_connect: No route to 0x%lx\n", pcb->remote_ip.addr));
 #ifdef UDP_STATS
-	++lwip_stats.udp.rterr;
+        ++lwip_stats.udp.rterr;
 #endif /* UDP_STATS */
     	return ERR_RTE;
     }
@@ -544,7 +530,7 @@ udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
   } else if(ip_addr_isany(&pcb->remote_ip)) { 
     pcb->local_ip.addr = 0;
   }
-
+#endif
   /* Insert UDP PCB into the list of active UDP PCBs. */
   for(ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) {
     if(pcb == ipcb) {
diff --git a/src/include/ipv4/lwip/ip.h b/src/include/ipv4/lwip/ip.h
index 96db5936..c15d6622 100644
--- a/src/include/ipv4/lwip/ip.h
+++ b/src/include/ipv4/lwip/ip.h
@@ -114,8 +114,6 @@ PACK_STRUCT_END
 #define IPH_PROTO_SET(hdr, proto) (hdr)->_ttl_proto = (HTONS((proto) | (IPH_TTL(hdr) << 8)))
 #define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum)
 
-
-
 #if IP_DEBUG
 void ip_debug_print(struct pbuf *p);
 #endif /* IP_DEBUG */
diff --git a/src/include/lwip/debug.h b/src/include/lwip/debug.h
index aadefc43..ae50e969 100644
--- a/src/include/lwip/debug.h
+++ b/src/include/lwip/debug.h
@@ -29,6 +29,8 @@
  * Author: Adam Dunkels <adam@sics.se>
  *
  */
+#error this is the original lwIP debug.h file. do not include
+
 #ifndef __LWIP_DEBUG_H__
 #define __LWIP_DEBUG_H__
 
diff --git a/src/include/lwip/snmp.h b/src/include/lwip/snmp.h
index 0d01cf83..dabf9c39 100644
--- a/src/include/lwip/snmp.h
+++ b/src/include/lwip/snmp.h
@@ -106,6 +106,24 @@ void snmp_inc_udpoutdatagrams(void);
 /* define everything to be empty */
 #else
 
+/* network interface */
+#define snmp_add_ifinoctets() 
+#define snmp_inc_ifinucastpkts()
+#define snmp_inc_ifinnucastpkts()
+#define snmp_inc_ifindiscards()
+#define snmp_add_ifoutoctets()
+#define snmp_inc_ifoutucastpkts()
+#define snmp_inc_ifoutnucastpkts()
+#define snmp_inc_ifoutdiscards()
+
+/* IP */
+#define snmp_inc_ipinreceives()
+#define snmp_inc_ipindelivers()
+#define snmp_inc_ipindiscards()
+#define snmp_inc_ipoutdiscards()
+#define snmp_inc_ipoutrequests()
+#define snmp_inc_ipunknownprotos()
+
 // ICMP
 #define snmp_inc_icmpinmsgs()
 #define snmp_inc_icmpinerrors() 
@@ -133,7 +151,6 @@ void snmp_inc_udpoutdatagrams(void);
 #define snmp_inc_icmpouttimestampreps()
 #define snmp_inc_icmpoutaddrmasks()
 #define snmp_inc_icmpoutaddrmaskreps()
-
 // TCP
 #define snmp_inc_tcpactiveopens()
 #define snmp_inc_tcppassiveopens()