ifupdown: add manual method for IPv6. Closes bug 2497.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 68 insertions, 55 deletions

diff --git a/networking/ifupdown.c b/networking/ifupdown.c
index 3cb1ec858..59df4e80f 100644
--- a/networking/ifupdown.c
+++ b/networking/ifupdown.c
@@ -164,7 +164,7 @@ static char *get_var(const char *id, size_t idlen, struct interface_defn_t *ifd)
         return NULL;
 }
 
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
 static int count_netmask_bits(const char *dotted_quad)
 {
 //      int result;
@@ -195,7 +195,7 @@ static int count_netmask_bits(const char *dotted_quad)
         }
         return result;
 }
-#endif
+# endif
 
 static char *parse(const char *command, struct interface_defn_t *ifd)
 {
@@ -258,17 +258,17 @@ static char *parse(const char *command, struct interface_defn_t *ifd)
                                 varvalue = get_var(command, nextpercent - command, ifd);
 
                                 if (varvalue) {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
                                         /* "hwaddress <class> <address>":
                                          * unlike ifconfig, ip doesnt want <class>
                                          * (usually "ether" keyword). Skip it. */
                                         if (strncmp(command, "hwaddress", 9) == 0) {
                                                 varvalue = skip_whitespace(skip_non_whitespace(varvalue));
                                         }
-#endif
+# endif
                                         addstr(&result, varvalue, strlen(varvalue));
                                 } else {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
                                         /* Sigh...  Add a special case for 'ip' to convert from
                                          * dotted quad to bit count style netmasks.  */
                                         if (strncmp(command, "bnmask", 6) == 0) {
@@ -284,7 +284,7 @@ static char *parse(const char *command, struct interface_defn_t *ifd)
                                                         }
                                                 }
                                         }
-#endif
+# endif
                                         okay[opt_depth - 1] = 0;
                                 }
 
@@ -329,56 +329,64 @@ static int execute(const char *command, struct interface_defn_t *ifd, execfn *ex
         }
         return 1;
 }
-#endif
+
+#endif /* FEATURE_IFUPDOWN_IPV4 || FEATURE_IFUPDOWN_IPV6 */
+
 
 #if ENABLE_FEATURE_IFUPDOWN_IPV6
+
 static int FAST_FUNC loopback_up6(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         int result;
         result = execute("ip addr add ::1 dev %iface%", ifd, exec);
         result += execute("ip link set %iface% up", ifd, exec);
         return ((result == 2) ? 2 : 0);
-#else
+# else
         return execute("ifconfig %iface% add ::1", ifd, exec);
-#endif
+# endif
 }
 
 static int FAST_FUNC loopback_down6(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         return execute("ip link set %iface% down", ifd, exec);
-#else
+# else
         return execute("ifconfig %iface% del ::1", ifd, exec);
-#endif
+# endif
+}
+
+static int FAST_FUNC manual_up_down6(struct interface_defn_t *ifd UNUSED_PARAM, execfn *exec UNUSED_PARAM)
+{
+        return 1;
 }
 
 static int FAST_FUNC static_up6(struct interface_defn_t *ifd, execfn *exec)
 {
         int result;
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         result = execute("ip addr add %address%/%netmask% dev %iface%[[ label %label%]]", ifd, exec);
         result += execute("ip link set[[ mtu %mtu%]][[ addr %hwaddress%]] %iface% up", ifd, exec);
         /* Was: "[[ ip ....%gateway% ]]". Removed extra spaces w/o checking */
         result += execute("[[ip route add ::/0 via %gateway%]]", ifd, exec);
-#else
+# else
         result = execute("ifconfig %iface%[[ media %media%]][[ hw %hwaddress%]][[ mtu %mtu%]] up", ifd, exec);
         result += execute("ifconfig %iface% add %address%/%netmask%", ifd, exec);
         result += execute("[[route -A inet6 add ::/0 gw %gateway%]]", ifd, exec);
-#endif
+# endif
         return ((result == 3) ? 3 : 0);
 }
 
 static int FAST_FUNC static_down6(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         return execute("ip link set %iface% down", ifd, exec);
-#else
+# else
         return execute("ifconfig %iface% down", ifd, exec);
-#endif
+# endif
 }
 
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
 static int FAST_FUNC v4tunnel_up(struct interface_defn_t *ifd, execfn *exec)
 {
         int result;
@@ -394,14 +402,15 @@ static int FAST_FUNC v4tunnel_down(struct interface_defn_t * ifd, execfn * exec)
 {
         return execute("ip tunnel del %iface%", ifd, exec);
 }
-#endif
+# endif
 
 static const struct method_t methods6[] = {
-#if ENABLE_FEATURE_IFUPDOWN_IP
-        { "v4tunnel", v4tunnel_up, v4tunnel_down, },
-#endif
-        { "static", static_up6, static_down6, },
-        { "loopback", loopback_up6, loopback_down6, },
+# if ENABLE_FEATURE_IFUPDOWN_IP
+        { "v4tunnel" , v4tunnel_up     , v4tunnel_down   , },
+# endif
+        { "static"   , static_up6      , static_down6    , },
+        { "manual"   , manual_up_down6 , manual_up_down6 , },
+        { "loopback" , loopback_up6    , loopback_down6  , },
 };
 
 static const struct address_family_t addr_inet6 = {
@@ -409,43 +418,46 @@ static const struct address_family_t addr_inet6 = {
         ARRAY_SIZE(methods6),
         methods6
 };
+
 #endif /* FEATURE_IFUPDOWN_IPV6 */
 
+
 #if ENABLE_FEATURE_IFUPDOWN_IPV4
+
 static int FAST_FUNC loopback_up(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         int result;
         result = execute("ip addr add 127.0.0.1/8 dev %iface%", ifd, exec);
         result += execute("ip link set %iface% up", ifd, exec);
         return ((result == 2) ? 2 : 0);
-#else
+# else
         return execute("ifconfig %iface% 127.0.0.1 up", ifd, exec);
-#endif
+# endif
 }
 
 static int FAST_FUNC loopback_down(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         int result;
         result = execute("ip addr flush dev %iface%", ifd, exec);
         result += execute("ip link set %iface% down", ifd, exec);
         return ((result == 2) ? 2 : 0);
-#else
+# else
         return execute("ifconfig %iface% 127.0.0.1 down", ifd, exec);
-#endif
+# endif
 }
 
 static int FAST_FUNC static_up(struct interface_defn_t *ifd, execfn *exec)
 {
         int result;
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         result = execute("ip addr add %address%/%bnmask%[[ broadcast %broadcast%]] "
                         "dev %iface%[[ peer %pointopoint%]][[ label %label%]]", ifd, exec);
         result += execute("ip link set[[ mtu %mtu%]][[ addr %hwaddress%]] %iface% up", ifd, exec);
         result += execute("[[ip route add default via %gateway% dev %iface%]]", ifd, exec);
         return ((result == 3) ? 3 : 0);
-#else
+# else
         /* ifconfig said to set iface up before it processes hw %hwaddress%,
          * which then of course fails. Thus we run two separate ifconfig */
         result = execute("ifconfig %iface%[[ hw %hwaddress%]][[ media %media%]][[ mtu %mtu%]] up",
@@ -455,26 +467,26 @@ static int FAST_FUNC static_up(struct interface_defn_t *ifd, execfn *exec)
                                 ifd, exec);
         result += execute("[[route add default gw %gateway% %iface%]]", ifd, exec);
         return ((result == 3) ? 3 : 0);
-#endif
+# endif
 }
 
 static int FAST_FUNC static_down(struct interface_defn_t *ifd, execfn *exec)
 {
         int result;
-#if ENABLE_FEATURE_IFUPDOWN_IP
+# if ENABLE_FEATURE_IFUPDOWN_IP
         result = execute("ip addr flush dev %iface%", ifd, exec);
         result += execute("ip link set %iface% down", ifd, exec);
-#else
+# else
         /* result = execute("[[route del default gw %gateway% %iface%]]", ifd, exec); */
         /* Bringing the interface down deletes the routes in itself.
            Otherwise this fails if we reference 'gateway' when using this from dhcp_down */
         result = 1;
         result += execute("ifconfig %iface% down", ifd, exec);
-#endif
+# endif
         return ((result == 2) ? 2 : 0);
 }
 
-#if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
+# if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
 struct dhcp_client_t {
         const char *name;
         const char *startcmd;
@@ -500,21 +512,21 @@ static const struct dhcp_client_t ext_dhcp_clients[] = {
                 "kill `cat /var/run/udhcpc.%iface%.pid` 2>/dev/null",
         },
 };
-#endif /* ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCPC */
+# endif /* FEATURE_IFUPDOWN_EXTERNAL_DHCPC */
 
-#if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
+# if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
 static int FAST_FUNC dhcp_up(struct interface_defn_t *ifd, execfn *exec)
 {
         unsigned i;
-#if ENABLE_FEATURE_IFUPDOWN_IP
+#  if ENABLE_FEATURE_IFUPDOWN_IP
         /* ip doesn't up iface when it configures it (unlike ifconfig) */
         if (!execute("ip link set[[ addr %hwaddress%]] %iface% up", ifd, exec))
                 return 0;
-#else
+#  else
         /* needed if we have hwaddress on dhcp iface */
         if (!execute("ifconfig %iface%[[ hw %hwaddress%]] up", ifd, exec))
                 return 0;
-#endif
+#  endif
         for (i = 0; i < ARRAY_SIZE(ext_dhcp_clients); i++) {
                 if (exists_execable(ext_dhcp_clients[i].name))
                         return execute(ext_dhcp_clients[i].startcmd, ifd, exec);
@@ -522,31 +534,31 @@ static int FAST_FUNC dhcp_up(struct interface_defn_t *ifd, execfn *exec)
         bb_error_msg("no dhcp clients found");
         return 0;
 }
-#elif ENABLE_UDHCPC
+# elif ENABLE_UDHCPC
 static int FAST_FUNC dhcp_up(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_IP
+#  if ENABLE_FEATURE_IFUPDOWN_IP
         /* ip doesn't up iface when it configures it (unlike ifconfig) */
         if (!execute("ip link set[[ addr %hwaddress%]] %iface% up", ifd, exec))
                 return 0;
-#else
+#  else
         /* needed if we have hwaddress on dhcp iface */
         if (!execute("ifconfig %iface%[[ hw %hwaddress%]] up", ifd, exec))
                 return 0;
-#endif
+#  endif
         return execute("udhcpc " UDHCPC_CMD_OPTIONS " -p /var/run/udhcpc.%iface%.pid "
                         "-i %iface%[[ -H %hostname%]][[ -c %client%]][[ -s %script%]][[ %udhcpc_opts%]]",
                         ifd, exec);
 }
-#else
+# else
 static int FAST_FUNC dhcp_up(struct interface_defn_t *ifd UNUSED_PARAM,
                 execfn *exec UNUSED_PARAM)
 {
         return 0; /* no dhcp support */
 }
-#endif
+# endif
 
-#if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
+# if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
 static int FAST_FUNC dhcp_down(struct interface_defn_t *ifd, execfn *exec)
 {
         int result = 0;
@@ -569,7 +581,7 @@ static int FAST_FUNC dhcp_down(struct interface_defn_t *ifd, execfn *exec)
         result += static_down(ifd, exec);
         return ((result == 3) ? 3 : 0);
 }
-#elif ENABLE_UDHCPC
+# elif ENABLE_UDHCPC
 static int FAST_FUNC dhcp_down(struct interface_defn_t *ifd, execfn *exec)
 {
         int result;
@@ -586,13 +598,13 @@ static int FAST_FUNC dhcp_down(struct interface_defn_t *ifd, execfn *exec)
         result += static_down(ifd, exec);
         return ((result == 3) ? 3 : 0);
 }
-#else
+# else
 static int FAST_FUNC dhcp_down(struct interface_defn_t *ifd UNUSED_PARAM,
                 execfn *exec UNUSED_PARAM)
 {
         return 0; /* no dhcp support */
 }
-#endif
+# endif
 
 static int FAST_FUNC manual_up_down(struct interface_defn_t *ifd UNUSED_PARAM, execfn *exec UNUSED_PARAM)
 {
@@ -644,7 +656,8 @@ static const struct address_family_t addr_inet = {
         methods
 };
 
-#endif  /* if ENABLE_FEATURE_IFUPDOWN_IPV4 */
+#endif  /* FEATURE_IFUPDOWN_IPV4 */
+
 
 /* Returns pointer to the next word, or NULL.
  * In 1st case, advances *buf to the word after this one.