Merge pull request #80 from darconeous/mdns-resolv

Adds IPv6 and MDNS domain name resolution.

apps/dhcp/dhcp.c

@@ -114,7 +114,7 @@ PROCESS_THREAD(dhcp_process, ev, data)
   CTK_WIDGET_FOCUS(&window, &getbutton);
 
   ctk_window_open(&window);
-  dhcpc_init(uip_ethaddr.addr, sizeof(uip_ethaddr.addr));
+  dhcpc_init(uip_lladdr.addr, sizeof(uip_lladdr.addr));
 
 
   while(1) {

apps/email/email.c

@@ -191,8 +191,7 @@ applyconfig(void)
   addrptr = &addr;
 #if UIP_UDP
   if(uiplib_ipaddrconv(smtpserver, &addr) == 0) {
-    addrptr = resolv_lookup(smtpserver);
+    if(resolv_lookup(smtpserver, &addrptr) != RESOLV_STATUS_CACHED) {
-    if(addrptr == NULL) {
       resolv_query(smtpserver);
       ctk_label_set_text(&statuslabel, "Resolving host...");
       return;
@@ -334,7 +333,7 @@ PROCESS_THREAD(email_process, ev, data)
 #if UIP_UDP
     } else if(ev == resolv_event_found) {
       if(strcmp(data, smtpserver) == 0) {
-	if(resolv_lookup(smtpserver) != NULL) {
+    if(resolv_lookup(smtpserver, NULL) == RESOLV_STATUS_CACHED) {
 	  applyconfig();
 	  ctk_label_set_text(&statuslabel, "");
 	} else {

apps/ftp/ftp.c

@@ -434,7 +434,7 @@ PROCESS_THREAD(ftp_process, ev, data)
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
       if((char *)data != NULL &&
-	 (ipaddrptr = resolv_lookup((char *)data)) != NULL) {
+	 resolv_lookup((char *)data, &ipaddrptr) == RESOLV_STATUS_CACHED) {
 	connection = ftpc_connect(ipaddrptr, UIP_HTONS(21));
 	show_statustext("Connecting to ", hostname);
       } else {
@@ -508,8 +508,7 @@ PROCESS_THREAD(ftp_process, ev, data)
 	ptractive = 1;
 #if UIP_UDP
 	if(uiplib_ipaddrconv(hostname, &ipaddr) == 0) {
-	  ipaddrptr = resolv_lookup(hostname);
+	  if(resolv_lookup(hostname, &ipaddrptr) != RESOLV_STATUS_CACHED) {
-	  if(ipaddrptr == NULL) {
 	    resolv_query(hostname);
 	    show_statustext("Resolving host ", hostname);
 	    break;

apps/httpd-ws/httpd-ws.c

@@ -378,9 +378,7 @@ httpd_ws_request(char request_type, const char *host_ip, const char *host_hdr,
   ipaddr = &addr;
   if(uiplib_ipaddrconv(host_ip, &addr) == 0) {
 #if 0 && UIP_UDP
-    ipaddr = resolv_lookup(host_ip);
+    if(resolv_lookup(host, &ipaddr) != RESOLV_STATUS_CACHED) {
-
-    if(ipaddr == NULL) {
       return NULL;
     }
 #else /* UIP_UDP */

apps/irc/irc.c

@@ -246,8 +246,7 @@ PROCESS_THREAD(irc_process, ev, data)
 	ipaddr = &serveraddr;
 #if UIP_UDP
 	if(uiplib_ipaddrconv(server, &serveraddr) == 0) {
-	  ipaddr = resolv_lookup(server);
+	  if(resolv_lookup(server, &ipaddr) != RESOLV_STATUS_CACHED) {
-	  if(ipaddr == NULL) {
 	    resolv_query(server);
 	  } else {
 	    uip_ipaddr_copy(&serveraddr, ipaddr);
@@ -264,8 +263,7 @@ PROCESS_THREAD(irc_process, ev, data)
 #if UIP_UDP
     } else if(ev == resolv_event_found) {
       
-      ipaddr = resolv_lookup(server);
+	  if(resolv_lookup(server, &ipaddr) != RESOLV_STATUS_CACHED) {
-      if(ipaddr == NULL) {
 	ircc_text_output(&s, server, "hostname not found");
       } else {
 	uip_ipaddr_copy(&serveraddr, ipaddr);

apps/shell/shell-irc.c

@@ -157,7 +157,7 @@ PROCESS_THREAD(shell_irc_process, ev, data)
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
       if((char *)data != NULL &&
-	 resolv_lookup((char *)data) != NULL) {
+	 resolv_lookup((char *)data, &ipaddr) == RESOLV_STATUS_CACHED) {
 	uip_ipaddr_copy(serveraddr, ipaddr);
 	ircc_connect(&s, server, serveraddr, nick);
       } else {

apps/shell/shell-ping.c

@@ -166,7 +166,7 @@ PROCESS_THREAD(shell_ping_process, ev, data)
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
       if((char *)data != NULL &&
-	 resolv_lookup((char *)data) != NULL) {
+	 resolv_lookup((char *)data, &ipaddr) == RESOLV_STATUS_CACHED) {
 	uip_ipaddr_copy(serveraddr, ipaddr);
 	telnet_connect(&s, server, serveraddr, nick);
       } else {

apps/shell/shell-tcpsend.c

@@ -173,7 +173,7 @@ PROCESS_THREAD(shell_tcpsend_process, ev, data)
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
       if((char *)data != NULL &&
-	 resolv_lookup((char *)data) != NULL) {
+	 resolv_lookup((char *)data, &ipaddr) == RESOLV_STATUS_CACHED) {
 	uip_ipaddr_copy(serveraddr, ipaddr);
 	telnet_connect(&s, server, serveraddr, nick);
       } else {

apps/shell/shell-udpsend.c

@@ -123,7 +123,7 @@ PROCESS_THREAD(shell_udpsend_process, ev, data)
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
       if((char *)data != NULL &&
-	 resolv_lookup((char *)data) != NULL) {
+	 resolv_lookup((char *)data, &ipaddr) == RESOLV_STATUS_CACHED) {
 	uip_ipaddr_copy(serveraddr, ipaddr);
 	telnet_connect(&s, server, serveraddr, nick);
       } else {

apps/shell/shell-wget.c

@@ -130,12 +130,14 @@ open_url(char *url)
   /* Try to lookup the hostname. If it fails, we initiate a hostname
      lookup and print out an informative message on the statusbar. */
   if(uiplib_ipaddrconv(host, &addr) == 0) {
+    uip_ipaddr_t *addrptr;
     shell_output_str(&wget_command, "Not an IP address", "");
-    if(resolv_lookup(host) == NULL) {
+    if(resolv_lookup(host, &addrptr) == RESOLV_STATUS_UNCACHED) {
       shell_output_str(&wget_command, "Not resolved", "");
       resolv_query(host);
       return;
     }
+    uip_ipaddr_copy(&addr, addrptr);
   }
 #else /* UIP_UDP */
   uiplib_ipaddrconv(host, &addr);
@@ -171,7 +173,7 @@ PROCESS_THREAD(shell_wget_process, ev, data)
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
       if((char *)data != NULL &&
-	 resolv_lookup((char *)data) != NULL) {
+	 resolv_lookup((char *)data, NULL) == RESOLV_STATUS_CACHED) {
 	open_url(url);
       } else {
 	shell_output_str(&wget_command, "Host not found.", "");

apps/telnet/simpletelnet.c

@@ -163,8 +163,7 @@ connect(void)
   addrptr = &addr;
 #if UIP_UDP
   if(uiplib_ipaddrconv(telnethost, &addr) == 0) {
-    addrptr = resolv_lookup(telnethost);
+    if(resolv_lookup(telnethost, &addrptr) == RESOLV_STATUS_UNCACHED) {
-    if(addrptr == NULL) {
       resolv_query(telnethost);
       show("Resolving host...");
       return;
@@ -252,7 +251,7 @@ PROCESS_THREAD(simpletelnet_process, ev, data)
 #if UIP_UDP
     } else if(ev == resolv_event_found) {
       if(strcmp(data, telnethost) == 0) {
-	if(resolv_lookup(telnethost) != NULL) {
+	if(resolv_lookup(telnethost, NULL) == RESOLV_STATUS_CACHED) {
 	  connect();
 	} else {
 	  show("Host not found");

apps/vnc/vnc.c

@@ -134,8 +134,7 @@ connect(void)
 
   addrptr = &addr;
   if(uiplib_ipaddrconv(host, &addr) == 0) {
-    addrptr = resolv_lookup(host);
+    if(resolv_lookup(host, &addrptr) == RESOLV_STATUS_UNCACHED) {
-    if(addrptr == NULL) {
       resolv_query(host);
       show("Resolving host...");
       return;
@@ -198,7 +197,7 @@ PROCESS_THREAD(vnc_process, ev, data)
       LOADER_UNLOAD();
     } else if(ev == resolv_event_found) {
       if(strcmp(data, host) == 0) {
-	if(resolv_lookup(host) != NULL) {
+	if(resolv_lookup(host, NULL) == RESOLV_STATUS_CACHED) {
 	  connect();
 	} else {
 	  show("Host not found");

apps/webbrowser/webclient.c

@@ -140,9 +140,7 @@ webclient_get(const char *host, uint16_t port, const char *file)
   ipaddr = &addr;
   if(uiplib_ipaddrconv(host, &addr) == 0) {
 #if UIP_UDP
-    ipaddr = resolv_lookup(host);
+    if(resolv_lookup(host,&ipaddr) != RESOLV_STATUS_CACHED) {
-    
-    if(ipaddr == NULL) {
       return 0;
     }
 #else /* UIP_UDP */
@@ -486,7 +484,7 @@ webclient_appcall(void *state)
 	init_connection();
 	}*/
 #if UIP_UDP
-      if(resolv_lookup(s.host) == NULL) {
+      if(resolv_lookup(s.host, NULL) != RESOLV_STATUS_CACHED) {
 	resolv_query(s.host);
       }
 #endif /* UIP_UDP */

apps/webbrowser/www.c

@@ -348,11 +348,13 @@ open_url(void)
   /* Try to lookup the hostname. If it fails, we initiate a hostname
      lookup and print out an informative message on the statusbar. */
   if(uiplib_ipaddrconv(host, &addr) == 0) {
-    if(resolv_lookup(host) == NULL) {
+    uip_ipaddr_t *addrptr;
+    if(resolv_lookup(host, &addrptr) != RESOLV_STATUS_CACHED) {
       resolv_query(host);
       show_statustext("Resolving host...");
       return;
     }
+    uip_ipaddr_copy(&addr, addrptr);
   }
 #else /* UIP_UDP */
   uiplib_ipaddrconv(host, &addr);
@@ -553,7 +555,8 @@ PROCESS_THREAD(www_process, ev, data)
 #if UIP_UDP
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
-      if((char *)data != NULL && resolv_lookup((char *)data) != NULL) {
+      if((char *)data != NULL &&
+	 resolv_lookup((char *)data, NULL) == RESOLV_STATUS_CACHED) {
 	open_url();
       } else {
 	show_statustext("Host not found");

core/net/resolv.h

@@ -40,6 +40,16 @@
 #define __RESOLV_H__
 
 #include "contiki.h"
+#include "uip.h"
+
+/** If RESOLV_CONF_SUPPORTS_MDNS is set, then queries
+ *  for domain names in the `local` TLD will use MDNS and
+ *  will respond to MDNS queries for this device's hostname,
+ *  as described by draft-cheshire-dnsext-multicastdns.
+ */
+#ifndef RESOLV_CONF_SUPPORTS_MDNS
+#define RESOLV_CONF_SUPPORTS_MDNS     (1)
+#endif
 
 /**
  * Event that is broadcasted when a DNS name has been resolved.
@@ -48,10 +58,52 @@ CCIF extern process_event_t resolv_event_found;
 
 /* Functions. */
 CCIF void resolv_conf(const uip_ipaddr_t * dnsserver);
+
 CCIF uip_ipaddr_t *resolv_getserver(void);
-CCIF uip_ipaddr_t *resolv_lookup(const char *name);
+
+enum {
+  /** Hostname is fresh and usable. This response is cached and will eventually
+   *  expire to RESOLV_STATUS_EXPIRED.*/
+  RESOLV_STATUS_CACHED = 0,
+
+  /** Hostname was not found in the cache. Use resolv_query() to look it up. */
+  RESOLV_STATUS_UNCACHED,
+
+  /** Hostname was found, but it's status has expired. The address returned
+   *  should not be used. Use resolv_query() to freshen it up.
+   */
+  RESOLV_STATUS_EXPIRED,
+
+  /** The server has returned a not-found response for this domain name.
+   *  This response is cached for the period described in the server.
+   *  You may issue a new query at any time using resolv_query(), but
+   *  you will generally want to wait until this domain's status becomes
+   *  RESOLV_STATUS_EXPIRED.
+   */
+  RESOLV_STATUS_NOT_FOUND,
+
+  /** This hostname is in the process of being resolved. Try again soon. */
+  RESOLV_STATUS_RESOLVING,
+
+  /** Some sort of server error was encountered while trying to look up this
+   *  record. This response is cached and will eventually expire to
+   *  RESOLV_STATUS_EXPIRED.
+   */
+  RESOLV_STATUS_ERROR,
+};
+
+typedef uint8_t resolv_status_t;
+
+CCIF resolv_status_t resolv_lookup(const char *name, uip_ipaddr_t ** ipaddr);
+
 CCIF void resolv_query(const char *name);
 
+#if RESOLV_CONF_SUPPORTS_MDNS
+CCIF void resolv_set_hostname(const char *hostname);
+
+CCIF const char *resolv_get_hostname(void);
+#endif
+
 PROCESS_NAME(resolv_process);
 
 #endif /* __RESOLV_H__ */

core/net/uip-ds6.c

@@ -592,11 +592,11 @@ uip_ds6_get_global(int8_t state)
 
 /*---------------------------------------------------------------------------*/
 uip_ds6_maddr_t *
-uip_ds6_maddr_add(uip_ipaddr_t *ipaddr)
+uip_ds6_maddr_add(const uip_ipaddr_t *ipaddr)
 {
   if(uip_ds6_list_loop
      ((uip_ds6_element_t *)uip_ds6_if.maddr_list, UIP_DS6_MADDR_NB,
-      sizeof(uip_ds6_maddr_t), ipaddr, 128,
+      sizeof(uip_ds6_maddr_t), (void*)ipaddr, 128,
       (uip_ds6_element_t **)&locmaddr) == FREESPACE) {
     locmaddr->isused = 1;
     uip_ipaddr_copy(&locmaddr->ipaddr, ipaddr);
@@ -617,11 +617,11 @@ uip_ds6_maddr_rm(uip_ds6_maddr_t *maddr)
 
 /*---------------------------------------------------------------------------*/
 uip_ds6_maddr_t *
-uip_ds6_maddr_lookup(uip_ipaddr_t *ipaddr)
+uip_ds6_maddr_lookup(const uip_ipaddr_t *ipaddr)
 {
   if(uip_ds6_list_loop
      ((uip_ds6_element_t *)uip_ds6_if.maddr_list, UIP_DS6_MADDR_NB,
-      sizeof(uip_ds6_maddr_t), ipaddr, 128,
+      sizeof(uip_ds6_maddr_t), (void*)ipaddr, 128,
       (uip_ds6_element_t **)&locmaddr) == FOUND) {
     return locmaddr;
   }

core/net/uip-ds6.h

@@ -315,9 +315,9 @@ uip_ds6_addr_t *uip_ds6_get_global(int8_t state);
 
 /** \name Multicast address list basic routines */
 /** @{ */
-uip_ds6_maddr_t *uip_ds6_maddr_add(uip_ipaddr_t *ipaddr);
+uip_ds6_maddr_t *uip_ds6_maddr_add(const uip_ipaddr_t *ipaddr);
 void uip_ds6_maddr_rm(uip_ds6_maddr_t *maddr);
-uip_ds6_maddr_t *uip_ds6_maddr_lookup(uip_ipaddr_t *ipaddr);
+uip_ds6_maddr_t *uip_ds6_maddr_lookup(const uip_ipaddr_t *ipaddr);
 
 /** @} */
 

core/net/uip.c

@@ -115,14 +115,14 @@ const uip_ipaddr_t uip_broadcast_addr =
 const uip_ipaddr_t uip_all_zeroes_addr = { { 0x0, /* rest is 0 */ } };
 
 #if UIP_FIXEDETHADDR
-const struct uip_eth_addr uip_ethaddr = {{UIP_ETHADDR0,
+const uip_lladdr_t uip_lladdr = {{UIP_ETHADDR0,
 					  UIP_ETHADDR1,
 					  UIP_ETHADDR2,
 					  UIP_ETHADDR3,
 					  UIP_ETHADDR4,
 					  UIP_ETHADDR5}};
 #else
-struct uip_eth_addr uip_ethaddr = {{0,0,0,0,0,0}};
+uip_lladdr_t uip_lladdr = {{0,0,0,0,0,0}};
 #endif
 
 /* The packet buffer that contains incoming packets. */
@@ -1050,7 +1050,7 @@ uip_process(uint8_t flag)
       uip_ipaddr_copy(&ICMPBUF->srcipaddr, &uip_hostaddr);
       ICMPBUF->options[0] = ICMP6_OPTION_TARGET_LINK_ADDRESS;
       ICMPBUF->options[1] = 1;  /* Options length, 1 = 8 bytes. */
-      memcpy(&(ICMPBUF->options[2]), &uip_ethaddr, sizeof(uip_ethaddr));
+      memcpy(&(ICMPBUF->options[2]), &uip_lladdr, sizeof(uip_lladdr));
       ICMPBUF->icmpchksum = 0;
       ICMPBUF->icmpchksum = ~uip_icmp6chksum();
       

core/net/uip_arp.c

@@ -311,8 +311,8 @@ uip_arp_arpin(void)
       BUF->opcode = UIP_HTONS(ARP_REPLY);
 
       memcpy(BUF->dhwaddr.addr, BUF->shwaddr.addr, 6);
-      memcpy(BUF->shwaddr.addr, uip_ethaddr.addr, 6);
+      memcpy(BUF->shwaddr.addr, uip_lladdr.addr, 6);
-      memcpy(BUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
+      memcpy(BUF->ethhdr.src.addr, uip_lladdr.addr, 6);
       memcpy(BUF->ethhdr.dest.addr, BUF->dhwaddr.addr, 6);
       
       uip_ipaddr_copy(&BUF->dipaddr, &BUF->sipaddr);
@@ -408,8 +408,8 @@ uip_arp_out(void)
 
       memset(BUF->ethhdr.dest.addr, 0xff, 6);
       memset(BUF->dhwaddr.addr, 0x00, 6);
-      memcpy(BUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
+      memcpy(BUF->ethhdr.src.addr, uip_lladdr.addr, 6);
-      memcpy(BUF->shwaddr.addr, uip_ethaddr.addr, 6);
+      memcpy(BUF->shwaddr.addr, uip_lladdr.addr, 6);
     
       uip_ipaddr_copy(&BUF->dipaddr, &ipaddr);
       uip_ipaddr_copy(&BUF->sipaddr, &uip_hostaddr);
@@ -429,7 +429,7 @@ uip_arp_out(void)
     /* Build an ethernet header. */
     memcpy(IPBUF->ethhdr.dest.addr, tabptr->ethaddr.addr, 6);
   }
-  memcpy(IPBUF->ethhdr.src.addr, uip_ethaddr.addr, 6);
+  memcpy(IPBUF->ethhdr.src.addr, uip_lladdr.addr, 6);
   
   IPBUF->ethhdr.type = UIP_HTONS(UIP_ETHTYPE_IP);
 

core/net/uip_arp.h

@@ -54,7 +54,6 @@
 #include "net/uip.h"
 
 
-CCIF extern struct uip_eth_addr uip_ethaddr;
 
 /**
  * The Ethernet header.
@@ -130,12 +129,12 @@ void uip_arp_timer(void);
  *
  * \hideinitializer
  */
-#define uip_setethaddr(eaddr) do {uip_ethaddr.addr[0] = eaddr.addr[0]; \
+#define uip_setethaddr(eaddr) do {uip_lladdr.addr[0] = eaddr.addr[0]; \
-                              uip_ethaddr.addr[1] = eaddr.addr[1];\
+                              uip_lladdr.addr[1] = eaddr.addr[1];\
-                              uip_ethaddr.addr[2] = eaddr.addr[2];\
+                              uip_lladdr.addr[2] = eaddr.addr[2];\
-                              uip_ethaddr.addr[3] = eaddr.addr[3];\
+                              uip_lladdr.addr[3] = eaddr.addr[3];\
-                              uip_ethaddr.addr[4] = eaddr.addr[4];\
+                              uip_lladdr.addr[4] = eaddr.addr[4];\
-                              uip_ethaddr.addr[5] = eaddr.addr[5];} while(0)
+                              uip_lladdr.addr[5] = eaddr.addr[5];} while(0)
 
 /** @} */
 

cpu/6502/ipconfig/ipconfig.c

@@ -202,7 +202,7 @@ PROCESS_THREAD(ipconfig_process, ev, data)
   /* Allow resolver to set DNS server address. */
   PROCESS_PAUSE();
 
-  dhcpc_init(uip_ethaddr.addr, sizeof(uip_ethaddr.addr));
+  dhcpc_init(uip_lladdr.addr, sizeof(uip_lladdr.addr));
 
   while(1) {
     PROCESS_WAIT_EVENT();

cpu/arm/common/usb/cdc-eth/dhcps.c

@@ -298,7 +298,7 @@ create_msg(CC_REGISTER_ARG struct dhcp_msg *m)
   m->op = DHCP_REPLY;
   /* m->htype = DHCP_HTYPE_ETHERNET; */
 /*   m->hlen = DHCP_HLEN_ETHERNET; */
-/*   memcpy(m->chaddr, &uip_ethaddr,DHCP_HLEN_ETHERNET); */
+/*   memcpy(m->chaddr, &uip_lladdr,DHCP_HLEN_ETHERNET); */
   m->hops = 0;
   m->secs = 0;
   memcpy(m->siaddr, &uip_hostaddr, 4);

cpu/native/net/wpcap.c

@@ -155,11 +155,11 @@ HMODULE wpcap;
 
 static struct pcap *pcap;
 
-/* uip_ethaddr is defined in uip.c. It is not used in uip6.c. 
+/* uip_lladdr is defined in uip.c. It is not used in uip6.c. 
  * If needed for some purpose it can be defined here
  */
 #if UIP_CONF_IPV6
-//struct uip_eth_addr uip_ethaddr;
+//struct uip_eth_addr uip_lladdr;
 #endif
 
 static int (* pcap_findalldevs)(struct pcap_if **, char *);
@@ -266,7 +266,7 @@ set_ethaddr(struct in_addr addr)
           adapters->PhysicalAddress[4], adapters->PhysicalAddress[5]);
         log_message("set_ethaddr:  ethernetaddr: ", buffer);
 #if UIP_CONF_IPV6
-//      int i;for (i=0;i<6;i++) uip_ethaddr.addr[i] = adapters->PhysicalAddress[i];
+//      int i;for (i=0;i<6;i++) uip_lladdr.addr[i] = adapters->PhysicalAddress[i];
 #else
         uip_setethaddr((*(struct uip_eth_addr *)adapters->PhysicalAddress));
 #endif
@@ -328,7 +328,7 @@ set_ethaddr6(struct in_addr6 addr)
           adapters->PhysicalAddress[4], adapters->PhysicalAddress[5]);
         log_message("set_ethaddr:  ethernetaddr: ", buffer);
 #if UIP_CONF_IPV6
-//      int i;for (i=0;i<6;i++) uip_ethaddr.addr[i] = adapters->PhysicalAddress[i]; //does this need doing?
+//      int i;for (i=0;i<6;i++) uip_lladdr.addr[i] = adapters->PhysicalAddress[i]; //does this need doing?
 #else
         uip_setethaddr((*(struct uip_eth_addr *)adapters->PhysicalAddress));
 #endif

examples/ipv6/json-ws/json-ws-udp.c

@@ -75,9 +75,7 @@ json_ws_udp_setup(const char *host, uint16_t port)
   ipaddr = &server_ipaddr;
   if(uiplib_ipaddrconv(host, &server_ipaddr) == 0) {
 #if 0 && UIP_UDP
-    ipaddr = resolv_lookup(host);
+    if(resolv_lookup(host, &ipaddr) != RESOLV_STATUS_CACHED) {
-
-    if(ipaddr == NULL) {
       return 0;
     }
 #else /* UIP_UDP */

examples/sky-shell-webserver/Makefile

@@ -2,7 +2,7 @@ CONTIKI_PROJECT = sky-shell-webserver
 all: $(CONTIKI_PROJECT)
 PROJECT_SOURCEFILES = webserver-nogui.c
 HTTPD_CFS=1
-CFLAGS = -DWITH_UIP=1
+CFLAGS = -DWITH_UIP=1 -DRESOLV_CONF_SUPPORTS_MDNS=0
 DEFINES=NETSTACK_MAC=nullmac_driver,NETSTACK_RDC=nullrdc_driver 
 SMALL=1
 

examples/test-ipv6/tapdev6.c

@@ -187,7 +187,7 @@ tapdev_send(void)
     printf("\n");
   } else {
     memcpy(&BUF->dest, addr, 6);
-    memcpy(&BUF->src, &uip_ethaddr, 6);
+    memcpy(&BUF->src, &uip_lladdr, 6);
     uip_len += sizeof(struct uip_eth_hdr);
     do_send();
   }

examples/udp-ipv6/udp-client.c

@@ -30,8 +30,10 @@
 #include "contiki.h"
 #include "contiki-lib.h"
 #include "contiki-net.h"
+#include "net/resolv.h"
 
 #include <string.h>
+#include <stdbool.h>
 
 #define DEBUG DEBUG_PRINT
 #include "net/uip-debug.h"
@@ -42,7 +44,7 @@
 static struct uip_udp_conn *client_conn;
 /*---------------------------------------------------------------------------*/
 PROCESS(udp_client_process, "UDP client process");
-AUTOSTART_PROCESSES(&udp_client_process);
+AUTOSTART_PROCESSES(&resolv_process,&udp_client_process);
 /*---------------------------------------------------------------------------*/
 static void
 tcpip_handler(void)
@@ -102,20 +104,43 @@ set_global_address(void)
 }
 #endif /* UIP_CONF_ROUTER */
 /*---------------------------------------------------------------------------*/
-static void
+static resolv_status_t
 set_connection_address(uip_ipaddr_t *ipaddr)
 {
+#ifndef UDP_CONNECTION_ADDR
+#if RESOLV_CONF_SUPPORTS_MDNS
+#define UDP_CONNECTION_ADDR       contiki-udp-server.local
+#elif UIP_CONF_ROUTER
+#define UDP_CONNECTION_ADDR       aaaa:0:0:0:0212:7404:0004:0404
+#else
+#define UDP_CONNECTION_ADDR       fe80:0:0:0:6466:6666:6666:6666
+#endif
+#endif /* !UDP_CONNECTION_ADDR */
+
 #define _QUOTEME(x) #x
 #define QUOTEME(x) _QUOTEME(x)
-#ifdef UDP_CONNECTION_ADDR
+
+  resolv_status_t status = RESOLV_STATUS_ERROR;
+
   if(uiplib_ipaddrconv(QUOTEME(UDP_CONNECTION_ADDR), ipaddr) == 0) {
-    PRINTF("UDP client failed to parse address '%s'\n", QUOTEME(UDP_CONNECTION_ADDR));
+    uip_ipaddr_t *resolved_addr = NULL;
+    status = resolv_lookup(QUOTEME(UDP_CONNECTION_ADDR),&resolved_addr);
+    if(status == RESOLV_STATUS_UNCACHED || status == RESOLV_STATUS_EXPIRED) {
+      PRINTF("Attempting to look up %s\n",QUOTEME(UDP_CONNECTION_ADDR));
+      resolv_query(QUOTEME(UDP_CONNECTION_ADDR));
+      status = RESOLV_STATUS_RESOLVING;
+    } else if(status == RESOLV_STATUS_CACHED && resolved_addr != NULL) {
+      PRINTF("Lookup of \"%s\" succeded!\n",QUOTEME(UDP_CONNECTION_ADDR));
+    } else {
+      PRINTF("Lookup of \"%s\" failed. status = %d\n",QUOTEME(UDP_CONNECTION_ADDR),status);
     }
-#elif UIP_CONF_ROUTER
+    if(resolved_addr)
-  uip_ip6addr(ipaddr,0xaaaa,0,0,0,0x0212,0x7404,0x0004,0x0404);
+      uip_ipaddr_copy(ipaddr, resolved_addr);
-#else
+  } else {
-  uip_ip6addr(ipaddr,0xfe80,0,0,0,0x6466,0x6666,0x6666,0x6666);
+    status = RESOLV_STATUS_CACHED;
-#endif /* UDP_CONNECTION_ADDR */
+  }
+
+  return status;
 }
 /*---------------------------------------------------------------------------*/
 PROCESS_THREAD(udp_client_process, ev, data)
@@ -132,7 +157,17 @@ PROCESS_THREAD(udp_client_process, ev, data)
 
   print_local_addresses();
 
-  set_connection_address(&ipaddr);
+  static resolv_status_t status = RESOLV_STATUS_UNCACHED;
+  while(status != RESOLV_STATUS_CACHED) {
+    status = set_connection_address(&ipaddr);
+
+    if(status == RESOLV_STATUS_RESOLVING) {
+      PROCESS_WAIT_EVENT_UNTIL(ev == resolv_event_found);
+    } else if(status != RESOLV_STATUS_CACHED) {
+      PRINTF("Can't get connection address.\n");
+      PROCESS_YIELD();
+    }
+  }
 
   /* new connection with remote host */
   client_conn = udp_new(&ipaddr, UIP_HTONS(3000), NULL);

examples/udp-ipv6/udp-server.c

@@ -43,7 +43,7 @@
 static struct uip_udp_conn *server_conn;
 
 PROCESS(udp_server_process, "UDP server process");
-AUTOSTART_PROCESSES(&udp_server_process);
+AUTOSTART_PROCESSES(&resolv_process,&udp_server_process);
 /*---------------------------------------------------------------------------*/
 static void
 tcpip_handler(void)
@@ -94,6 +94,10 @@ PROCESS_THREAD(udp_server_process, ev, data)
   PROCESS_BEGIN();
   PRINTF("UDP server started\n");
 
+#if RESOLV_CONF_SUPPORTS_MDNS
+  resolv_set_hostname("contiki-udp-server");
+#endif
+
 #if UIP_CONF_ROUTER
   uip_ip6addr(&ipaddr, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
   uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);

examples/wget/wget.c

@@ -113,15 +113,16 @@ start_get(void)
 #if UIP_UDP
   /* First check if the host is an IP address. */
   if(uiplib_ipaddrconv(host, &addr) == 0) {    
-    
+    uip_ipaddr_t *addrptr;
     /* Try to lookup the hostname. If it fails, we initiate a hostname
        lookup and print out an informative message on the
        statusbar. */
-    if(resolv_lookup(host) == NULL) {
+    if(resolv_lookup(host, &addrptr) != RESOLV_STATUS_CACHED) {
       resolv_query(host);
       puts("Resolving host...");
       return;
     }
+    uip_ipaddr_copy(&addr, addrptr);
   }
 #else /* UIP_UDP */
   uiplib_ipaddrconv(host, &addr);
@@ -184,7 +185,7 @@ PROCESS_THREAD(wget_process, ev, data)
     } else if(ev == resolv_event_found) {
       /* Either found a hostname, or not. */
       if((char *)data != NULL &&
-        resolv_lookup((char *)data) != NULL) {
+        resolv_lookup((char *)data, NULL) == RESOLV_STATUS_CACHED) {
         start_get();
       } else {
         puts("Host not found");

regression-tests/10-ipv6/01-cooja-ipv6-udp.csc

@@ -49,7 +49,7 @@ make udp-server.cooja TARGET=cooja</commands>
       <identifier>mtype512</identifier>
       <description>Sender</description>
       <contikiapp>[CONTIKI_DIR]/examples/udp-ipv6/udp-client.c</contikiapp>
-      <commands>make udp-client.cooja TARGET=cooja DEFINES=UDP_CONNECTION_ADDR=fe80::201:1:1:1</commands>
+      <commands>make udp-client.cooja TARGET=cooja</commands>
       <moteinterface>se.sics.cooja.interfaces.Position</moteinterface>
       <moteinterface>se.sics.cooja.interfaces.Battery</moteinterface>
       <moteinterface>se.sics.cooja.contikimote.interfaces.ContikiVib</moteinterface>

tools/cooja/apps/mspsim/example/helloworld.map

@@ -685,7 +685,7 @@ LOAD /cygdrive/c/mspgcc/bin/../lib/gcc-lib/msp430/3.2.3/msp2/libgcc.a
  .data          0x000002d8        0x2 contiki-esb.a(service.o)
  .data          0x000002da        0x0 contiki-esb.a(timer.o)
  .data          0x000002da        0x6 contiki-esb.a(uip.o)
-                0x000002da                uip_ethaddr
+                0x000002da                uip_lladdr
  .data          0x000002e0        0xa contiki-esb.a(tr1001-drv.o)
                 0x000002e0                tr1001_drv_process
  .data          0x000002ea        0x0 contiki-esb.a(esb-sensors.o)

tools/stm32w/wpcapslip6/wpcap6.c

@@ -123,7 +123,7 @@ static int (* pcap_sendpacket)(struct pcap *, unsigned char *, int);
 #include "net/uip_arp.h"
 
 
-struct uip_eth_addr uip_ethaddr = {{0,0,0,0,0,0}};
+struct uip_eth_addr uip_lladdr = {{0,0,0,0,0,0}};
 
 static char interface_name[256] = "";
 
@@ -147,7 +147,7 @@ error_exit(char *msg1)
 static void
 setethaddr(struct uip_eth_addr *a)
 {
-  memcpy(&uip_ethaddr, a, sizeof(struct uip_eth_addr));
+  memcpy(&uip_lladdr, a, sizeof(struct uip_eth_addr));
 }
 /*---------------------------------------------------------------------------*/
 static void
@@ -271,7 +271,7 @@ wpcap_poll(char * buf)
 
   eth_hdr = (struct uip_eth_hdr *)packet;
 
-  if(memcmp(&uip_ethaddr,&eth_hdr->src,sizeof(struct uip_eth_addr))!=0){
+  if(memcmp(&uip_lladdr,&eth_hdr->src,sizeof(struct uip_eth_addr))!=0){
 	  // It's not a packet originated from the interface itself.
 	  return 0;
   }

tools/wpcapslip/wpcap.c

@@ -150,7 +150,7 @@ struct arp_entry {
   struct uip_eth_addr ethaddr;
   uint8_t time;
 };
-static struct uip_eth_addr uip_ethaddr = {{0,0,0,0,0,0}};
+static struct uip_eth_addr uip_lladdr = {{0,0,0,0,0,0}};
 static const uip_ipaddr_t all_zeroes_addr = { { 0x0, /* rest is 0 */ } };
 static const struct uip_eth_addr broadcast_ethaddr =
   {{0xff,0xff,0xff,0xff,0xff,0xff}};
@@ -224,7 +224,7 @@ init_pcap(struct in_addr addr)
 static void
 setethaddr(struct uip_eth_addr *a)
 {
-  memcpy(&uip_ethaddr, a, sizeof(struct uip_eth_addr));
+  memcpy(&uip_lladdr, a, sizeof(struct uip_eth_addr));
 }
 /*---------------------------------------------------------------------------*/
 static void
@@ -439,8 +439,8 @@ arp_out(struct ethip_hdr *iphdr, int len)
 
       memset(arphdr->ethhdr.dest.addr, 0xff, 6);
       memset(arphdr->dhwaddr.addr, 0x00, 6);
-      memcpy(arphdr->ethhdr.src.addr, uip_ethaddr.addr, 6);
+      memcpy(arphdr->ethhdr.src.addr, uip_lladdr.addr, 6);
-      memcpy(arphdr->shwaddr.addr, uip_ethaddr.addr, 6);
+      memcpy(arphdr->shwaddr.addr, uip_lladdr.addr, 6);
     
       uip_ipaddr_copy(&arphdr->dipaddr, &ipaddr);
       uip_ipaddr_copy(&arphdr->sipaddr, &netaddr);
@@ -460,7 +460,7 @@ arp_out(struct ethip_hdr *iphdr, int len)
     memcpy(iphdr->ethhdr.dest.addr, tabptr->ethaddr.addr, 6);
     }
 #endif /* 0 */
-  memcpy(iphdr->ethhdr.src.addr, uip_ethaddr.addr, 6);
+  memcpy(iphdr->ethhdr.src.addr, uip_lladdr.addr, 6);
 
   iphdr->ethhdr.type = UIP_HTONS(UIP_ETHTYPE_IP);
 
@@ -489,8 +489,8 @@ do_arp(void *buf, int len)
 	hdr->opcode = UIP_HTONS(ARP_REPLY);
 	
 	memcpy(&hdr->dhwaddr.addr, &hdr->shwaddr.addr, 6);
-	memcpy(&hdr->shwaddr.addr, &uip_ethaddr.addr, 6);
+	memcpy(&hdr->shwaddr.addr, &uip_lladdr.addr, 6);
-	memcpy(&hdr->ethhdr.src.addr, &uip_ethaddr.addr, 6);
+	memcpy(&hdr->ethhdr.src.addr, &uip_lladdr.addr, 6);
 	memcpy(&hdr->ethhdr.dest.addr, &hdr->dhwaddr.addr, 6);
 	
 	uip_ipaddr_copy(&tmpaddr, &hdr->dipaddr);