path: root/debian/patches/pfinet_dhcp.patch

2007-10-14  Christian Dietrich  <stettberger@dokucode.de>

	* options.c (options): Marked -a, -g -m, -p, -A, -G
	OPTION_ARG_OPTIONAL. Adding -d option.
	(parse_interface_copy_device): New function.
	(parse_opt): When selecting another interface with -i 
	set the options from e.g. a prior fsysopts call as default
	values. For -a, -g, -p, -g, -A, -G set the optional 
	argument as value. When there is no argument, delete the
	value (e.g. unset default gateway). Delete delete default gateways
	only if the set gateway is on an interface modified in this call.
	Add always an route for dhcp packages on all devices. By doing
	this we can send dhcp renew packages.
	(trivfs_append_args): Add --gateway only once.

2007-10-14  Marco Gerards  <metgerards@student.han.nl>

	* options.c (options): Add the option `dhcp'.
	(parse_hook_add_interface): Initialize the `dhcp' member for the
	parse hook.
	(parse_opt): In case pfinet is started with the argument `--dhcp',
	set the address to `0.0.0.0', the netmask to `255.0.0.0' and add
	the route for `0.0.0.0' so broadcasting works.

	* linux-src/net/ipv4/devinet.c (inet_insert_ifa) [_HURD_]: Don't
	fail when the address is `0.0.0.0'.
      
---
 pfinet/linux-src/net/ipv4/devinet.c |    2 
 pfinet/options.c                    |  381 ++++++++++++++++++++++++++----------
 2 files changed, 278 insertions(+), 105 deletions(-)

--- a/pfinet/options.c
+++ b/pfinet/options.c
@@ -60,23 +60,26 @@ extern struct inet6_dev *ipv6_find_idev 
 extern int inet6_addr_add (int ifindex, struct in6_addr *pfx, int plen);
 extern int inet6_addr_del (int ifindex, struct in6_addr *pfx, int plen);
 
+#ifdef CONFIG_IPV6
+static struct rt6_info * ipv6_get_dflt_router (void);
+#endif
+
 
 /* Pfinet options.  Used for both startup and runtime.  */
 static const struct argp_option options[] =
 {
-  {"interface", 'i', "DEVICE",  0,  "Network interface to use", 1},
+  {"interface", 'i', "DEVICE",   0,  "Network interface to use", 1},
   {0,0,0,0,"These apply to a given interface:", 2},
-  {"address",   'a', "ADDRESS", 0, "Set the network address"},
-  {"netmask",   'm', "MASK",    0, "Set the netmask"},
-  {"peer",      'p', "ADDRESS", 0, "Set the peer address"},
-  {"gateway",   'g', "ADDRESS", 0, "Set the default gateway"},
-  {"ipv4",      '4', "NAME",    0, "Put active IPv4 translator on NAME"},
+  {"address",   'a', "ADDRESS",  OPTION_ARG_OPTIONAL, "Set the network address"},
+  {"netmask",   'm', "MASK",     OPTION_ARG_OPTIONAL, "Set the netmask"},
+  {"peer",      'p', "ADDRESS",  OPTION_ARG_OPTIONAL, "Set the peer address"},
+  {"gateway",   'g', "ADDRESS",  OPTION_ARG_OPTIONAL, "Set the default gateway"},
+  {"ipv4",      '4', "NAME",     0, "Put active IPv4 translator on NAME"},
 #ifdef CONFIG_IPV6  
-  {"ipv6",      '6', "NAME",    0, "Put active IPv6 translator on NAME"},
-  {"address6",  'A', "ADDR/LEN",0, "Set the global IPv6 address"},
-  {"gateway6",  'G', "ADDRESS", 0, "Set the IPv6 default gateway"},
+  {"ipv6",      '6', "NAME",     0, "Put active IPv6 translator on NAME"},
+  {"address6",  'A', "ADDR/LEN", OPTION_ARG_OPTIONAL, "Set the global IPv6 address"},
+  {"gateway6",  'G', "ADDRESS",  OPTION_ARG_OPTIONAL, "Set the IPv6 default gateway"},
 #endif
-  {"shutdown",  's', 0,         0, "Shut it down"},
   {0}
 };
 
@@ -112,6 +115,50 @@ struct parse_hook
   struct parse_interface *curint;
 };
 
+static void
+parse_interface_copy_device(struct device *src,
+                            struct parse_interface *dst)
+{
+  uint32_t broad;
+  struct rt_key key = { 0 };
+  struct inet6_dev *idev = NULL;
+  struct fib_result res;
+
+  inquire_device (src, &dst->address, &dst->netmask, 
+                  &dst->peer, &broad);
+  /* Get gateway */
+  dst->gateway = INADDR_NONE;
+  key.oif = src->ifindex;
+  if (! main_table->tb_lookup (main_table, &key, &res)
+      && FIB_RES_GW(res) != INADDR_ANY)
+    dst->gateway = FIB_RES_GW (res);
+#ifdef CONFIG_IPV6
+  if (trivfs_protid_portclasses[PORTCLASS_INET6] != MACH_PORT_NULL)
+    idev = ipv6_find_idev(src);
+
+  if (idev)
+  {
+    struct inet6_ifaddr *ifa = idev->addr_list;
+    
+    /* Look for IPv6 default router and add it to the interface,
+     * if it belongs to it.
+     */
+    struct rt6_info *rt6i = ipv6_get_dflt_router();
+    if (rt6i->rt6i_dev == src) 
+      memcpy (&dst->gateway6, &rt6i->rt6i_gateway, sizeof (struct in6_addr));
+    /* Search for global address and set it in dst */
+    do 
+    {
+      if (!IN6_IS_ADDR_LINKLOCAL (&ifa->addr)) {
+        memcpy (&dst->address6, ifa, sizeof (struct inet6_ifaddr));
+        break;
+      }
+    }
+    while ((ifa = ifa->if_next));
+  }
+#endif
+}
+
 /* Adds an empty interface slot to H, and sets H's current interface to it, or
    returns an error. */
 static error_t
@@ -122,6 +169,7 @@ parse_hook_add_interface (struct parse_h
 	     (h->num_interfaces + 1) * sizeof (struct parse_interface));
   if (! new)
     return ENOMEM;
+
   h->interfaces = new;
   h->num_interfaces++;
   h->curint = new + h->num_interfaces - 1;
@@ -183,10 +231,16 @@ parse_opt (int opt, char *arg, struct ar
      if (addr == INADDR_NONE) PERR (EINVAL, "Malformed %s", type);	      \
      addr; })
 
+  if (!arg && state->next < state->argc
+      && (*state->argv[state->next] != '-'))
+    {
+      arg = state->argv[state->next];
+      state->next ++;
+    }
+
   switch (opt)
     {
-      struct parse_interface *in;
-      uint32_t gateway;
+      struct parse_interface *in, *gw4_in;
 #ifdef CONFIG_IPV6
       struct parse_interface *gw6_in;
       char *ptr;
@@ -217,29 +271,59 @@ parse_opt (int opt, char *arg, struct ar
       if (err)
 	FAIL (err, 10, err, "%s", arg);
 
+      /* Set old interface values */
+      parse_interface_copy_device (in->device, in);
       break;
 
     case 'a':
-      h->curint->address = ADDR (arg, "address");
-      if (!IN_CLASSA (ntohl (h->curint->address))
-	  && !IN_CLASSB (ntohl (h->curint->address))
-	  && !IN_CLASSC (ntohl (h->curint->address)))
-	{
-	  if (IN_MULTICAST (ntohl (h->curint->address)))
-	    FAIL (EINVAL, 1, 0,
-		  "%s: Cannot set interface address to multicast address",
-		  arg);
-	  else
-	    FAIL (EINVAL, 1, 0,
-		  "%s: Illegal or undefined network address", arg);
-	}
+      if (arg)
+      {
+        h->curint->address = ADDR (arg, "address");
+        if (!IN_CLASSA (ntohl (h->curint->address))
+            && !IN_CLASSB (ntohl (h->curint->address))
+            && !IN_CLASSC (ntohl (h->curint->address)))
+          {
+            if (IN_MULTICAST (ntohl (h->curint->address)))
+              FAIL (EINVAL, 1, 0,
+                    "%s: Cannot set interface address to multicast address",
+                    arg);
+            else
+              FAIL (EINVAL, 1, 0,
+                    "%s: Illegal or undefined network address", arg);
+          }
+      } else { 
+        h->curint->address = ADDR ("0.0.0.0", "address");
+        h->curint->netmask = ADDR ("255.0.0.0", "netmask");
+        h->curint->gateway = INADDR_NONE;
+      }
       break;
+
     case 'm':
-      h->curint->netmask = ADDR (arg, "netmask"); break;
+      if (arg)
+        h->curint->netmask = ADDR (arg, "netmask"); 
+      else 
+        h->curint->netmask = INADDR_NONE;
+      break;
+
     case 'p':
-      h->curint->peer = ADDR (arg, "peer"); break;
+      if (arg)
+        h->curint->peer = ADDR (arg, "peer"); 
+      else 
+        h->curint->peer = INADDR_NONE;
+      break;
+
     case 'g':
-      h->curint->gateway = ADDR (arg, "gateway"); break;
+      if (arg)
+	{
+	  /* Remove an possible other default gateway */ 
+	  for (in = h->interfaces; in < h->interfaces + h->num_interfaces; 
+	       in++)
+	    in->gateway = INADDR_NONE;
+	  h->curint->gateway = ADDR (arg, "gateway");
+	}
+      else 
+        h->curint->gateway = INADDR_NONE;
+      break;
 
     case '4':
       pfinet_bind (PORTCLASS_INET, arg);
@@ -254,36 +338,46 @@ parse_opt (int opt, char *arg, struct ar
       break;
 
     case 'A':
-      if ((ptr = strchr (arg, '/'))) 
+      if (arg)
 	{
-	  h->curint->address6.prefix_len = atoi (ptr + 1);
-	  if (h->curint->address6.prefix_len > 128) 
-	    FAIL (EINVAL, 1, 0, "%s: The prefix-length is invalid", arg);
+	  if ((ptr = strchr (arg, '/'))) 
+	    {
+	      h->curint->address6.prefix_len = atoi (ptr + 1);
+	      if (h->curint->address6.prefix_len > 128) 
+		FAIL (EINVAL, 1, 0, "%s: The prefix-length is invalid", arg);
+	      
+	      *ptr = 0;
+	    }
+	  else
+	    {
+	      h->curint->address6.prefix_len = 64;
+	      fprintf (stderr, "No prefix-length given, "
+		       "defaulting to %s/64.\n", arg);
+	    }
+
+	  if (inet_pton (AF_INET6, arg, &h->curint->address6.addr) <= 0)
+	    PERR (EINVAL, "Malformed address");
 
-	  *ptr = 0;
+	  if (IN6_IS_ADDR_MULTICAST (&h->curint->address6.addr))
+	    FAIL (EINVAL, 1, 0, "%s: Cannot set interface address to "
+		  "multicast address", arg);
 	}
       else
-	{
-	  h->curint->address6.prefix_len = 64;
-	  fprintf (stderr, "No prefix-length given, defaulting to %s/64.\n",
-		   arg);
-	}
-
-      if (inet_pton (AF_INET6, arg, &h->curint->address6.addr) <= 0)
-	PERR (EINVAL, "Malformed address");
-
-      if (IN6_IS_ADDR_MULTICAST (&h->curint->address6.addr))
-	FAIL (EINVAL, 1, 0, "%s: Cannot set interface address to "
-	      "multicast address", arg);
+        memset (&h->curint->address6, 0, sizeof (struct inet6_ifaddr));
       break;
 
     case 'G':
-      if (inet_pton (AF_INET6, arg, &h->curint->gateway6) <= 0)
-	PERR (EINVAL, "Malformed gateway");
+      if (arg)
+	{
+	  if (inet_pton (AF_INET6, arg, &h->curint->gateway6) <= 0)
+	    PERR (EINVAL, "Malformed gateway");
 
-      if (IN6_IS_ADDR_MULTICAST (&h->curint->gateway6))
-	FAIL (EINVAL, 1, 0, "%s: Cannot set gateway to "
-	      "multicast address", arg);
+	  if (IN6_IS_ADDR_MULTICAST (&h->curint->gateway6))
+	    FAIL (EINVAL, 1, 0, "%s: Cannot set gateway to "
+		  "multicast address", arg);
+	}
+      else
+        memset (&h->curint->gateway6, 0, sizeof (struct in6_addr));
       break;
 #endif /* CONFIG_IPV6 */
 
@@ -323,20 +417,19 @@ parse_opt (int opt, char *arg, struct ar
 	  /* Specifying a netmask for an address-less interface is a no-no.  */
 	  FAIL (EDESTADDRREQ, 14, 0, "Cannot set netmask");
 #endif
-
-      gateway = INADDR_NONE;
 #ifdef CONFIG_IPV6
       gw6_in = NULL;
 #endif
+      gw4_in = NULL;
       for (in = h->interfaces; in < h->interfaces + h->num_interfaces; in++)
 	{
+          /* delete interface if it doesn't match the actual netmask */
+          if (! ( (h->curint->address & h->curint->netmask) 
+                  == (h->curint->gateway & h->curint->netmask))) 
+            h->curint->gateway = INADDR_NONE;
+
 	  if (in->gateway != INADDR_NONE)
-	    {
-	      if (gateway != INADDR_NONE)
-		FAIL (err, 15, 0, "Cannot have multiple default gateways");
-	      gateway = in->gateway;
-	      in->gateway = INADDR_NONE;
-	    }
+              gw4_in = in;
 
 #ifdef CONFIG_IPV6
 	  if (!IN6_IS_ADDR_UNSPECIFIED (&in->gateway6))
@@ -361,15 +454,20 @@
 	    idev = ipv6_find_idev(in->device);
 #endif
 
-	  if (in->address != INADDR_NONE || in->netmask != INADDR_NONE)
+	  if (in->address == INADDR_NONE && in->netmask == INADDR_NONE)
 	    {
-	      err = configure_device (in->device, in->address, in->netmask,
-				      in->peer, INADDR_NONE);
-	      if (err)
-		{
-		  pthread_mutex_unlock (&global_lock);
-		  FAIL (err, 16, 0, "cannot configure interface");
-		}
+	      h->curint->address = ADDR ("0.0.0.0", "address");
+	      h->curint->netmask = ADDR ("255.0.0.0", "netmask");
+	    }
+
+	  if (in->device)
+	    err = configure_device (in->device, in->address, in->netmask,
+				    in->peer, INADDR_NONE);
+
+	  if (err)
+	    {
+	      pthread_mutex_unlock (&global_lock);
+	      FAIL (err, 16, 0, "cannot configure interface");
 	    }
 
 #ifdef CONFIG_IPV6
@@ -377,24 +475,25 @@
 	    continue;
 
 	  /* First let's remove all non-local addresses. */
-	  struct inet6_ifaddr *ifa = idev->addr_list;
-
-	  while (ifa)
-	    {
-	      struct inet6_ifaddr *c_ifa = ifa;
-	      ifa = ifa->if_next;
-
-	      if (IN6_ARE_ADDR_EQUAL (&c_ifa->addr, &in->address6.addr))
-		memset (&in->address6, 0, sizeof (struct inet6_ifaddr));
-
-	      else if (!IN6_IS_ADDR_LINKLOCAL (&c_ifa->addr)
-		       && !IN6_IS_ADDR_SITELOCAL (&c_ifa->addr))
-		inet6_addr_del (in->device->ifindex, &c_ifa->addr,
-				c_ifa->prefix_len);
-	    }
-
-	  if (!IN6_IS_ADDR_UNSPECIFIED (&in->address6.addr))
-	    {
+ 	  struct inet6_ifaddr *ifa = idev->addr_list;
+ 
+ 	  while (ifa)
+  	    {
+ 	      struct inet6_ifaddr *c_ifa = ifa;
+ 	      ifa = ifa->if_next;
+ 
+ 	      if (!IN6_IS_ADDR_UNSPECIFIED (&in->address6.addr)
+		  && IN6_ARE_ADDR_EQUAL (&c_ifa->addr, &in->address6.addr))
+ 		memset (&in->address6, 0, sizeof (struct inet6_ifaddr));
+  
+ 	      else if (!IN6_IS_ADDR_LINKLOCAL (&c_ifa->addr)
+ 		       && !IN6_IS_ADDR_SITELOCAL (&c_ifa->addr))
+ 		inet6_addr_del (in->device->ifindex, &c_ifa->addr,
+ 				c_ifa->prefix_len);
+ 	    }
+ 
+ 	  if (!IN6_IS_ADDR_UNSPECIFIED (&in->address6.addr))
+ 	    {
 	      /* Now assign the new address */
 	      inet6_addr_add (in->device->ifindex, &in->address6.addr,
 			      in->address6.prefix_len);
@@ -418,33 +517,40 @@
 	req.nlh.nlmsg_seq = 0;
 	req.nlh.nlmsg_len = NLMSG_LENGTH (sizeof req.rtm);
 
-	bzero (&req.rtm, sizeof req.rtm);
-	bzero (&rta, sizeof rta);
+	memset (&req.rtm, 0, sizeof req.rtm);
+	memset (&rta, 0, sizeof rta);
 	req.rtm.rtm_scope = RT_SCOPE_UNIVERSE;
 	req.rtm.rtm_type = RTN_UNICAST;
 	req.rtm.rtm_protocol = RTPROT_STATIC;
-	rta.rta_gw = &gateway;
 
-	if (gateway == INADDR_NONE)
+	if (!gw4_in)
 	  {
-	    /* Delete any existing default route.  */
-	    req.nlh.nlmsg_type = RTM_DELROUTE;
-	    req.nlh.nlmsg_flags = 0;
-	    tb = fib_get_table (req.rtm.rtm_table);
-	    if (tb)
-	      {
-		err = - (*tb->tb_delete) (tb, &req.rtm, &rta, &req.nlh, 0);
-		if (err && err != ESRCH)
-		  {
-		    pthread_mutex_unlock (&global_lock);
-		    FAIL (err, 17, 0, "cannot remove old default gateway");
-		  }
-		err = 0;
-	      }
+	    /* Delete any existing default route on configured devices  */
+            for (in = h->interfaces; in < h->interfaces + h->num_interfaces;
+                 in++) {
+              req.nlh.nlmsg_type = RTM_DELROUTE;
+              req.nlh.nlmsg_flags = 0;
+              rta.rta_oif = &in->device->ifindex;
+              tb = fib_get_table (req.rtm.rtm_table);
+              if (tb)
+                {
+                  err = - (*tb->tb_delete) 
+                    (tb, &req.rtm, &rta, &req.nlh, 0);
+                  if (err && err != ESRCH)
+                    {
+                      pthread_mutex_unlock (&global_lock);
+                      FAIL (err, 17, 0, 
+                            "cannot remove old default gateway");
+                    }
+                  err = 0;
+                }
+            }
 	  }
 	else
 	  {
 	    /* Add a default route, replacing any existing one.  */
+            rta.rta_oif = &gw4_in->device->ifindex;
+            rta.rta_gw = &gw4_in->gateway;
 	    req.nlh.nlmsg_type = RTM_NEWROUTE;
 	    req.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
 	    tb = fib_new_table (req.rtm.rtm_table);
@@ -467,13 +573,77 @@
 	  if (!gw6_in || rt6i->rt6i_dev != gw6_in->device
 	      || !IN6_ARE_ADDR_EQUAL (&rt6i->rt6i_gateway, &gw6_in->gateway6))
 	    {
-	      rt6_purge_dflt_routers (0);
+              /* Delete any existing default route on configured devices  */
+              for (in = h->interfaces; in < h->interfaces 
+                   + h->num_interfaces; in++) 
+                if (rt6i->rt6i_dev == in->device || gw6_in )
+                  rt6_purge_dflt_routers (0);
+
 	      if (gw6_in)
 		rt6_add_dflt_router (&gw6_in->gateway6, gw6_in->device);
 	    }
 	}
 #endif       
 
+      /*  Setup the routing required for DHCP. */
+      for (in = h->interfaces; in < h->interfaces + h->num_interfaces; in++)
+	{
+	  struct kern_rta rta;
+	  struct
+	  {
+	    struct nlmsghdr nlh;
+	    struct rtmsg rtm;
+	  } req;
+	  struct fib_table *tb;
+	  struct rtentry route;
+	  struct sockaddr_in *dst;
+	  struct device *dev;
+
+	  if (!in->device)
+	    continue;
+
+	  dst = (struct sockaddr_in *) &route.rt_dst;
+	  if (!in->device->name) 
+	    {
+	      pthread_mutex_unlock (&global_lock);
+	      FAIL (ENODEV, 17, 0, "unknown device");
+	    }
+	  dev = dev_get (in->device->name);
+	  if (!dev)
+	    {
+	      pthread_mutex_unlock (&global_lock);
+	      FAIL (ENODEV, 17, 0, "unknown device");
+	    }
+
+	  /* Simulate the SIOCADDRT behavior.  */
+	  memset (&route, 0, sizeof (struct rtentry));
+	  memset (&req.rtm, 0, sizeof req.rtm);
+	  memset (&rta, 0, sizeof rta);
+	  req.nlh.nlmsg_type = RTM_NEWROUTE;
+
+	  /* Append this routing for 0.0.0.0.  By this way we can send always
+	     dhcp messages (e.g dhcp renew). */
+	  req.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE
+	    | NLM_F_APPEND;
+	  req.rtm.rtm_protocol = RTPROT_BOOT;
+	  req.rtm.rtm_scope = RT_SCOPE_LINK;
+	  req.rtm.rtm_type = RTN_UNICAST;
+	  rta.rta_dst = &dst->sin_addr.s_addr;
+	  rta.rta_oif = &dev->ifindex;
+
+	  tb = fib_new_table (req.rtm.rtm_table);
+	  if (tb)
+	    err = tb->tb_insert (tb, &req.rtm, &rta, &req.nlh, NULL);
+	  else
+	    err = ENOBUFS;
+
+	  if (err)
+	    {
+	      pthread_mutex_unlock (&global_lock);
+	      FAIL (err, 17, 0, "cannot add route");
+	    }
+	}
+
       pthread_mutex_unlock (&global_lock);
 
       /* Fall through to free hook.  */
@@ -526,8 +696,9 @@
         ADD_ADDR_OPT ("netmask", mask);
       if (peer != addr)
 	ADD_ADDR_OPT ("peer", peer);
-      key.iif = dev->ifindex;
-      if (! main_table->tb_lookup (main_table, &key, &res)) 
+      key.oif = dev->ifindex;
+      if (! main_table->tb_lookup (main_table, &key, &res)
+          && FIB_RES_GW(res) != INADDR_ANY)
 	ADD_ADDR_OPT ("gateway", FIB_RES_GW (res));
 
 #undef ADD_ADDR_OPT
--- a/pfinet/linux-src/net/ipv4/devinet.c
+++ b/pfinet/linux-src/net/ipv4/devinet.c
@@ -214,10 +214,12 @@ inet_insert_ifa(struct in_device *in_dev
 {
 	struct in_ifaddr *ifa1, **ifap, **last_primary;
 
+#ifndef _HURD_
 	if (ifa->ifa_local == 0) {
 		inet_free_ifa(ifa);
 		return 0;
 	}
+#endif
 
 	ifa->ifa_flags &= ~IFA_F_SECONDARY;
 	last_primary = &in_dev->ifa_list;