opt.h, netif.h, dhcp.h, dhcp.c: New configuration option LWIP_NETIF_HOSTNAME allow to define a hostname in netif struct (this is just a pointer, so, you can use a hardcoded string, point on one of your's ethernetif field, or alloc a string you will free yourself). It will be used by DHCP to register a client hostname, but can also be use when you call snmp_set_sysname.

CHANGELOG

@@ -23,6 +23,13 @@ HISTORY
 
   ++ New features:
 
+  2007-03-28 Frédéric Bernon
+  * opt.h, netif.h, dhcp.h, dhcp.c: New configuration option LWIP_NETIF_HOSTNAME allow to
+    define a hostname in netif struct (this is just a pointer, so, you can use a hardcoded
+    string, point on one of your's ethernetif field, or alloc a string you will free yourself).
+    It will be used by DHCP to register a client hostname, but can also be use when you call
+    snmp_set_sysname.
+    
   2007-03-28 Frédéric Bernon
   * netif.h, netif.c: A new NETIF_FLAG_ETHARP flag is defined in netif.h, to allow to 
     initialize a network interface's flag with. It tell this interface is an ethernet

src/core/dhcp.c

@@ -217,6 +217,10 @@ static err_t dhcp_select(struct netif *netif)
   struct dhcp *dhcp = netif->dhcp;
   err_t result;
   u16_t msecs;
+#if LWIP_NETIF_HOSTNAME
+  const char *p;
+#endif /* LWIP_NETIF_HOSTNAME */
+
   LWIP_DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_select(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
 
   /* create and initialize the DHCP message header */
@@ -242,6 +246,16 @@ static err_t dhcp_select(struct netif *netif)
     dhcp_option_byte(dhcp, DHCP_OPTION_BROADCAST);
     dhcp_option_byte(dhcp, DHCP_OPTION_DNS_SERVER);
 
+#if LWIP_NETIF_HOSTNAME
+    p = ( const char *)netif->hostname;
+    if (p!=NULL) {
+      dhcp_option(dhcp, DHCP_OPTION_HOSTNAME, strlen(p));
+      while(*p) {
+        dhcp_option_byte(dhcp, *p++);
+      }
+    }
+#endif /* LWIP_NETIF_HOSTNAME */
+
     dhcp_option_trailer(dhcp);
     /* shrink the pbuf to the actual content length */
     pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);

src/include/lwip/dhcp.h

@@ -210,6 +210,7 @@ void dhcp_fine_tmr(void);
 
 #define DHCP_OPTION_T1 58 /* T1 renewal time */
 #define DHCP_OPTION_T2 59 /* T2 rebinding time */
+#define DHCP_OPTION_US 60
 #define DHCP_OPTION_CLIENT_ID 61
 #define DHCP_OPTION_TFTP_SERVERNAME 66
 #define DHCP_OPTION_BOOTFILE 67

src/include/lwip/netif.h

@@ -104,6 +104,10 @@ struct netif {
   /** the DHCP client state information for this netif */
   struct dhcp *dhcp;
 #endif /* LWIP_DHCP */
+#if LWIP_NETIF_HOSTNAME
+  /* the hostname for this netif, NULL is a valid value */
+  char*  hostname;
+#endif /* LWIP_NETIF_HOSTNAME */
   /** number of bytes used in hwaddr */
   u8_t hwaddr_len;
   /** link level hardware address of this interface */

src/include/lwip/opt.h

@@ -383,6 +383,13 @@ a lot of data that needs to be copied, this should be set high. */
 #define TCP_SNDLOWAT                    TCP_SND_BUF/2
 #endif
 
+
+/* ---- Network Interfaces options ---- */
+/* 1 if you want to use DHCP_OPTION_HOSTNAME with netif's hostname field */
+#ifndef LWIP_NETIF_HOSTNAME
+#define LWIP_NETIF_HOSTNAME             0
+#endif
+
 /* Support network interface callbacks */
 #ifndef LWIP_NETIF_CALLBACK
 #define LWIP_NETIF_CALLBACK             0
@@ -401,6 +408,8 @@ a lot of data that needs to be copied, this should be set high. */
 #define LWIP_CALLBACK_API               0
 #endif 
 
+
+/* ---------- Thread options ---------- */
 #ifndef TCPIP_THREAD_PRIO
 #define TCPIP_THREAD_PRIO               1
 #endif
@@ -418,7 +427,7 @@ a lot of data that needs to be copied, this should be set high. */
 #endif
 
 
-/* ---------- Socket Options ---------- */
+/* ---------- Socket options ---------- */
 /* Enable BSD-style sockets functions names */
 #ifndef LWIP_COMPAT_SOCKETS
 #define LWIP_COMPAT_SOCKETS             1