added code from Philip A Prindeville <philipp@enteka.com> which expands

the interfaces option to this:

"interfaces = le0 le1" or "interfaces = all".

it uses SIOCGIFxxxx ioctl calls.

1 files changed, 210 insertions, 186 deletions

diff --git a/source/lib/interface.c b/source/lib/interface.c
index 940af1eccf4..e03333280a8 100644
--- a/source/lib/interface.c
+++ b/source/lib/interface.c
@@ -21,62 +21,29 @@
 
 #include "includes.h"
 
+#include <assert.h>		/* added by philipp */
+
 extern int DEBUGLEVEL;
 
 struct in_addr ipzero;
 struct in_addr wins_ip;
-static struct in_addr default_ip;
-static struct in_addr default_bcast;
-static struct in_addr default_nmask;
-static BOOL got_ip=False;
-static BOOL got_bcast=False;
-static BOOL got_nmask=False;
 
 struct interface *local_interfaces  = NULL;
+struct interface *present_interfaces = NULL;
 
 struct interface *last_iface;
 
-/****************************************************************************
-calculate the default netmask for an address
-****************************************************************************/
-static void default_netmask(struct in_addr *inm, struct in_addr *iad)
-{
-  uint32 ad = ntohl(iad->s_addr);
-  uint32 nm;
-  /*
-  ** Guess a netmask based on the class of the IP address given.
-  */
-  if ( (ad & 0x80000000) == 0 ) {
-    /* class A address */
-    nm = 0xFF000000;
-  } else if ( (ad & 0xC0000000) == 0x80000000 ) {
-    /* class B address */
-    nm = 0xFFFF0000;
-  } else if ( (ad & 0xE0000000) == 0xC0000000 ) {
-    /* class C address */
-    nm = 0xFFFFFF00;
-  }  else {
-    /* class D or E; netmask doesn't make much sense - guess 4 bits */
-    nm =  0xFFFFFFF0;
-  }
-  inm->s_addr = htonl(nm);
-}
-
-
-/****************************************************************************
-  get the broadcast address for our address 
-(troyer@saifr00.ateng.az.honeywell.com)
-****************************************************************************/
-static void get_broadcast(struct in_addr *if_ipaddr,
-			  struct in_addr *if_bcast,
-			  struct in_addr *if_nmask)
+static void get_interfaces()
 {  
-  BOOL found = False;
-#ifndef NO_GET_BROADCAST
   int sock = -1;               /* AF_INET raw socket desc */
   char buff[1024];
-  struct ifreq *ifr=NULL;
+  struct ifreq *ifr=NULL, ifr2;
   int i;
+  struct interface *iface, *last_iface = NULL;
+
+#ifndef	ifr_mtu
+#define	ifr_mtu	ifr_metric
+#endif
 
 #if defined(EVEREST)
   int n_interfaces;
@@ -89,12 +56,9 @@ static void get_broadcast(struct in_addr *if_ipaddr,
 #else
   struct ifconf ifc;
 #endif
-#endif
 
-  /* get a default netmask and broadcast */
-  default_netmask(if_nmask, if_ipaddr);
+  if (present_interfaces) return;	/* already initialized */
 
-#ifndef NO_GET_BROADCAST  
   /* Create a socket to the INET kernel. */
 #if USE_SOCKRAW
   if ((sock = socket(AF_INET, SOCK_RAW, PF_INET )) < 0)
@@ -126,11 +90,42 @@ static void get_broadcast(struct in_addr *if_ipaddr,
       ifr = ifc.ifc_req;
 
       for (i = 0; i < n_interfaces; ++i) {
-	if (if_ipaddr->s_addr ==
-	    ((struct sockaddr_in *) &ifr[i].ifr_addr)->sin_addr.s_addr) {
-	  found = True;
-	  break;
-	}
+	ifr2 = ifr[i];
+	if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFFLAGS failed\n"));
+
+        if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) != IFF_RUNNING)
+	  continue;
+
+	iface = (struct interface *)malloc(sizeof(*iface));
+	assert(iface != NULL);
+	iface->next = NULL;
+	iface->ip = ((struct sockaddr_in *) &ifr[i].ifr_addr)->sin_addr;
+	iface->name = strdup(ifr[i].ifr_name);
+	iface->flags = ifr2.ifr_flags;
+
+	/* complete with netmask and b'cast address */
+	ifr2 = *ifr;
+	if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFNETMASK failed\n"));
+	else
+	  iface->nmask = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
+	if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFBRDADDR failed\n"));
+	else
+	  iface->bcast = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
+	if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFMTU failed\n"));
+	else
+	  iface->mtu = ifr2.ifr_mtu;
+
+	DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
+
+        if (!present_interfaces)
+	  present_interfaces = iface;
+	else
+	  last_iface->next = iface;
+	last_iface = iface;
       }
     }
   }
@@ -147,10 +142,46 @@ static void get_broadcast(struct in_addr *if_ipaddr,
 
     /* Loop through interfaces, looking for given IP address */
     for (i = ifc->ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) {
-      if (if_ipaddr->s_addr ==
-	  (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) {
-	found = True;
-	break;
+      ifr2 = *ifr;
+      if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
+	DEBUG(0,("SIOCGIFFLAGS failed\n"));
+
+      if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) {
+
+	iface = (struct interface *)malloc(sizeof(*iface));
+	assert(iface != NULL);
+	iface->next = NULL;
+	iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
+	iface->name = strdup(ifr->ifr_name);
+	iface->flags = ifr2.ifr_flags;
+
+	/* complete with netmask and b'cast address */
+	ifr2 = *ifr;
+	strioctl.ic_cmd = SIOCGIFNETMASK;
+	strioctl.ic_dp  = (char *)&ifr2;
+	strioctl.ic_len = sizeof(struct ifr2);
+	if (ioctl(sock, I_STR, &strioctl) < 0)
+	  DEBUG(0,("Failed I_STR/SIOCGIFNETMASK: %s\n", strerror(errno)));
+	else
+	  iface->nmask = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
+	strioctl.ic_cmd = SIOCGIFBRDADDR;
+	if (ioctl(sock, I_STR, &strioctl) < 0)
+	  DEBUG(0,("SIOCGIFBRDADDR failed\n"));
+	else
+	  iface->bcast = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
+	strioctl.ic_cmd = SIOCGIFMTU;
+	if (ioctl(sock, I_STR, &strioctl) < 0)
+	  DEBUG(0,("SIOCGIFMTU failed\n"));
+	else
+	  iface->mtu = ifr2.ifr_mtu;
+
+	DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
+
+	if (!present_interfaces)
+	  present_interfaces = iface;
+	else
+	  last_iface->next = iface;
+	last_iface = iface;
       }
     }
   }
@@ -164,11 +195,42 @@ static void get_broadcast(struct in_addr *if_ipaddr,
     /* Loop through interfaces, looking for given IP address */
     i = ifc.ifc_len;
     while (i > 0) {
-      if (if_ipaddr->s_addr ==
-	  (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) {
-	found = True;
-	break;
+      ifr2 = *ifr;
+      if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
+	DEBUG(0,("SIOCGIFFLAGS failed\n"));
+
+      if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) {
+	iface = (struct interface *)malloc(sizeof(*iface));
+	assert(iface != NULL);
+	iface->next = NULL;
+	iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
+	iface->name = strdup(ifr->ifr_name);
+	iface->flags = ifr2.ifr_flags;
+
+	/* complete with netmask and b'cast address */
+	ifr2 = *ifr;
+	if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFNETMASK failed\n"));
+	else
+	  iface->nmask = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
+	if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFBRDADDR failed\n"));
+	else
+	  iface->bcast = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
+	if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFMTU failed\n"));
+	else
+	  iface->mtu = ifr2.ifr_mtu;
+
+	DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
+
+	if (!present_interfaces)
+	  present_interfaces = iface;
+	else
+	  last_iface->next = iface;
+	last_iface = iface;
       }
+
       i -= ifr->ifr_addr.sa_len + IFNAMSIZ;
       ifr = (struct ifreq*) ((char*) ifr + ifr->ifr_addr.sa_len + IFNAMSIZ);
     }
@@ -183,70 +245,53 @@ static void get_broadcast(struct in_addr *if_ipaddr,
   
     /* Loop through interfaces, looking for given IP address */
     for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) {
+      ifr2 = *ifr;
+      if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
+	DEBUG(0,("SIOCGIFFLAGS failed\n"));
+
+      if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) {
 #ifdef BSDI
-      if (ioctl(sock, SIOCGIFADDR, ifr) < 0) break;
+	if (ioctl(sock, SIOCGIFADDR, ifr) < 0) break;
 #endif
-      if (if_ipaddr->s_addr ==
-	  (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) {
-	found = True;
-	break;
+
+	iface = (struct interface *)malloc(sizeof(*iface));
+	assert(iface != NULL);
+	iface->next = NULL;
+	iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
+	iface->name = strdup(ifr->ifr_name);
+	iface->flags = ifr2.ifr_flags;
+
+	/* complete with netmask and b'cast address */
+	ifr2 = *ifr;
+	if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFNETMASK failed\n"));
+	else
+	  iface->nmask = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
+	if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFBRDADDR failed\n"));
+	else
+	  iface->bcast = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
+	if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0)
+	  DEBUG(0,("SIOCGIFMTU failed\n"));
+	else
+	  iface->mtu = ifr2.ifr_mtu;
+
+	DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
+
+	if (!present_interfaces)
+	  present_interfaces = iface;
+	else
+	  last_iface->next = iface;
+	last_iface = iface;
       }
     }
   }
 #endif
-  
-  if (!found) {
-    DEBUG(0,("No interface found for address %s\n", inet_ntoa(*if_ipaddr)));
-  } else {
-    /* Get the netmask address from the kernel */
-#ifdef USE_IFREQ
-    ifreq = *ifr;
-  
-    strioctl.ic_cmd = SIOCGIFNETMASK;
-    strioctl.ic_dp  = (char *)&ifreq;
-    strioctl.ic_len = sizeof(struct ifreq);
-    if (ioctl(sock, I_STR, &strioctl) < 0)
-      DEBUG(0,("Failed I_STR/SIOCGIFNETMASK: %s\n", strerror(errno)));
-    else
-      *if_nmask = ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr;
-#else
-    if (ioctl(sock, SIOCGIFNETMASK, ifr) < 0)
-      DEBUG(0,("SIOCGIFNETMASK failed\n"));
-    else
-      *if_nmask = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr;
-#endif
-
-    DEBUG(4,("Netmask for %s = %s\n", ifr->ifr_name,
-	     inet_ntoa(*if_nmask)));
-  }
 
   /* Close up shop */
   (void) close(sock);
-  
-#endif
-
-  /* sanity check on the netmask */
-  {
-    uint32 nm = ntohl(if_nmask->s_addr);
-    if ((nm >> 24) != 0xFF) {
-      DEBUG(0,("Impossible netmask %s - using defaults\n",inet_ntoa(*if_nmask)));
-      default_netmask(if_nmask, if_ipaddr);      
-    }
-  }
-
-  /* derive the broadcast assuming a 1's broadcast, as this is what
-     all MS operating systems do, we have to comply even if the unix
-     box is setup differently */
-  {
-    uint32 ad = ntohl(if_ipaddr->s_addr);
-    uint32 nm = ntohl(if_nmask->s_addr);
-    uint32 bc = (ad & nm) | (0xffffffff & ~nm);
-    if_bcast->s_addr = htonl(bc);
-  }
-  
-  DEBUG(4,("Derived broadcast address %s\n", inet_ntoa(*if_bcast)));
-}  /* get_broadcast */
 
+}  /* get_interfaces */
 
 
 /****************************************************************************
@@ -257,42 +302,68 @@ static void interpret_interfaces(char *s, struct interface **interfaces,
 {
   char *ptr = s;
   fstring token;
-  struct interface *iface;
-  struct in_addr ip;
+  struct interface *iface, *i;
+  BOOL seenALL = False;
 
   ipzero = *interpret_addr2("0.0.0.0");
   wins_ip = *interpret_addr2("255.255.255.255");
 
+  get_interfaces();
+
   while (next_token(&ptr,token,NULL)) {
-    /* parse it into an IP address/netmasklength pair */
-    char *p = strchr(token,'/');
-    if (p) *p = 0;
 
-    ip = *interpret_addr2(token);
+    if (strcasecmp(token, "ALL")) {
+      if (*interfaces) {
+	DEBUG(0, ("Error: interface name \"ALL\" must occur alone\n"));
+	/* should do something here ... */
+      }
 
-    /* maybe we already have it listed */
-    {
-      struct interface *i;
-      for (i=(*interfaces);i;i=i->next)
-	if (ip_equal(ip,i->ip)) break;
-      if (i) continue;
+      /* should we copy the list, or just point at it? */
+      for (i = present_interfaces; i; i = i->next) {
+	iface = (struct interface *)malloc(sizeof(*iface));
+	if (!iface) return;
+
+	*iface = *i;
+	iface->next = NULL;
+
+	if (!(*interfaces))
+	  (*interfaces) = iface;
+	else
+	  last_iface->next = iface;
+	last_iface = iface;
+      }
+
+      seenALL = True;
+      continue;
+    } else if (seenALL) {
+      DEBUG(0, ("Error: can't mix interface \"ALL\" with other interface namess\n"));
+      continue;
     }
 
+    /* maybe we already have it listed */
+    for (i=(*interfaces);i;i=i->next)
+      if (strcasecmp(token,i->name)) break;
+    if (i) continue;
+
     iface = (struct interface *)malloc(sizeof(*iface));
     if (!iface) return;
 
-    iface->ip = ip;
+    /* make sure name is known */
+    for (i=present_interfaces;i;i=i->next)
+      if (strcasecmp(token,i->name)) break;
 
-    if (p) {
-      if (strlen(p+1)>2)
-	iface->nmask = *interpret_addr2(p+1);
-      else
-	iface->nmask.s_addr = htonl(~((1<<(32-atoi(p+1)))-1));
-    } else {
-      default_netmask(&iface->nmask,&iface->ip);
+    if (!i) {
+      DEBUG(0, ("Warning: unknown interface \"%s\" specified\n", token));
+      continue;
     }
-    iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr;
+
+    *iface = *i;
     iface->next = NULL;
+    if (iface->bcast.s_addr != (iface->ip.s_addr | ~iface->nmask.s_addr)) {
+      DEBUG(0, ("Warning: overriding b'cast address %s on interface %s\n",
+	    inet_ntoa(iface->bcast), iface->name));
+      iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr;
+    }
 
     if (!(*interfaces)) {
       (*interfaces) = iface;
@@ -305,41 +376,8 @@ static void interpret_interfaces(char *s, struct interface **interfaces,
     DEBUG(1,("nmask=%s\n",inet_ntoa(iface->nmask)));	     
   }
 
-  if (*interfaces) return;
-
-  /* setup a default interface */
-  iface = (struct interface *)malloc(sizeof(*iface));
-  if (!iface) return;
-
-  iface->next = NULL;
-
-  if (got_ip) {
-    iface->ip = default_ip;
-  } else {
-    get_myname(NULL,&iface->ip);
-  }
-
-  if (got_bcast) {
-    iface->bcast = default_bcast;
-  } else {
-    get_broadcast(&iface->ip,&iface->bcast,&iface->nmask);
-  }
-
-  if (got_nmask) {
-    iface->nmask = default_nmask;
-    iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr;
-  }
-
-  if (iface->bcast.s_addr != (iface->ip.s_addr | ~iface->nmask.s_addr)) {
-    DEBUG(2,("Warning: inconsistant interface %s\n",inet_ntoa(iface->ip)));
-  }
-
-  iface->next = NULL;
-  (*interfaces) = last_iface = iface;
-
-  DEBUG(1,("Added interface ip=%s ",inet_ntoa(iface->ip)));
-  DEBUG(1,("bcast=%s ",inet_ntoa(iface->bcast)));
-  DEBUG(1,("nmask=%s\n",inet_ntoa(iface->nmask)));	     
+  if (! *interfaces)
+    DEBUG(0,("Error: no interfaces specified.\n"));
 }
 
 
@@ -358,20 +396,8 @@ void load_interfaces(void)
   **************************************************************************/
 void iface_set_default(char *ip,char *bcast,char *nmask)
 {
-  if (ip) {
-    got_ip = True;
-    default_ip = *interpret_addr2(ip);
-  }
-
-  if (bcast) {
-    got_bcast = True;
-    default_bcast = *interpret_addr2(bcast);
-  }
-
-  if (nmask) {
-    got_nmask = True;
-    default_nmask = *interpret_addr2(nmask);
-  }
+  DEBUG(0, ("iface_set_default: function deprecated.\n"));
+  exit(1);
 }
 
 
@@ -453,5 +479,3 @@ struct in_addr *iface_ip(struct in_addr ip)
   return(&iface_find(ip)->ip);
 }
 
-
-