dhcpv6: assign all viable DHCPv6 addresses by default (FS#402, FS#524)

[project/odhcpd.git] / src / config.c

diff --git a/src/config.c b/src/config.c
index 2369372..19b901c 100644 (file)
--- a/src/config.c
+++ b/src/config.c
@@ -4,12 +4,14 @@
 #include <arpa/inet.h>
 #include <unistd.h>
 #include <libgen.h>
+#include <net/if.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <syslog.h>
 
 #include <uci.h>
 #include <uci_blob.h>
+#include <libubox/utils.h>
 
 #include "odhcpd.h"
 
@@ -41,6 +43,7 @@ enum {
        IFACE_ATTR_DOMAIN,
        IFACE_ATTR_FILTER_CLASS,
        IFACE_ATTR_DHCPV6_RAW,
+       IFACE_ATTR_DHCPV6_ASSIGNALL,
        IFACE_ATTR_RA_DEFAULT,
        IFACE_ATTR_RA_MANAGEMENT,
        IFACE_ATTR_RA_OFFLINK,
@@ -81,6 +84,7 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
        [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
        [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
+       [IFACE_ATTR_DHCPV6_ASSIGNALL] = { .name ="dhcpv6_assignall", .type = BLOBMSG_TYPE_BOOL },
        [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
@@ -203,9 +207,10 @@ static struct interface* get_interface(const char *name)
 
 static void set_interface_defaults(struct interface *iface)
 {
-       iface->managed = 1;
        iface->learn_routes = 1;
        iface->dhcpv4_leasetime = 43200;
+       iface->dhcpv6_assignall = true;
+       iface->ra_managed = RA_MANAGED_MFLAG;
        iface->ra_maxinterval = 600;
        iface->ra_mininterval = iface->ra_maxinterval/3;
        iface->ra_lifetime = -1;
@@ -235,6 +240,8 @@ static void close_interface(struct interface *iface)
        setup_dhcpv4_interface(iface, false);
 
        clean_interface(iface);
+       free(iface->ia_addr);
+       free(iface->ifname);
        free(iface);
 }
 
@@ -384,6 +391,8 @@ err:
 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
 {
        struct blob_attr *tb[IFACE_ATTR_MAX], *c;
+       bool get_addrs = false;
+
        blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
 
        if (tb[IFACE_ATTR_INTERFACE])
@@ -394,16 +403,18 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
 
        struct interface *iface = get_interface(name);
        if (!iface) {
-               iface = calloc(1, sizeof(*iface));
+               char *iface_name;
+
+               iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
                if (!iface)
                        return -1;
 
-               strncpy(iface->name, name, sizeof(iface->name) - 1);
+               iface->name = strcpy(iface_name, name);
 
                set_interface_defaults(iface);
 
                list_add(&iface->head, &interfaces);
-               overwrite = true;
+               get_addrs = overwrite = true;
        }
 
        const char *ifname = NULL;
@@ -415,19 +426,32 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
        }
 
 #ifdef WITH_UBUS
-       if (overwrite || !iface->ifname[0])
+       if (overwrite || !iface->ifname)
                ifname = ubus_get_ifname(name);
 #endif
 
-       if (!iface->ifname[0] && !ifname)
+       if (!iface->ifname && !ifname)
                goto err;
 
-       if (ifname)
-               strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
+       if (ifname) {
+               free(iface->ifname);
+               iface->ifname = strdup(ifname);
+
+               if (!iface->ifname)
+                       goto err;
+       }
 
        if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
                goto err;
 
+       if (get_addrs) {
+               ssize_t len = odhcpd_get_interface_addresses(iface->ifindex,
+                                               true, &iface->ia_addr);
+
+               if (len > 0)
+                       iface->ia_addr_len = len;
+       }
+
        iface->inuse = true;
 
        if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
@@ -596,11 +620,14 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
                odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
        }
 
+       if ((c = tb[IFACE_ATTR_DHCPV6_ASSIGNALL]))
+               iface->dhcpv6_assignall = blobmsg_get_bool(c);
+
        if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
                iface->default_router = blobmsg_get_u32(c);
 
        if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
-               iface->managed = blobmsg_get_u32(c);
+               iface->ra_managed = blobmsg_get_u32(c);
 
        if ((c = tb[IFACE_ATTR_RA_REACHABLETIME])) {
                uint32_t ra_reachabletime = blobmsg_get_u32(c);
@@ -611,15 +638,19 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
        }
 
        if ((c = tb[IFACE_ATTR_RA_RETRANSTIME])) {
-               iface->ra_retranstime = blobmsg_get_u32(c);
-               if (iface->ra_retranstime > 60000)
+               uint32_t ra_retranstime = blobmsg_get_u32(c);
+               if (ra_retranstime > 60000)
                        goto err;
+
+               iface->ra_retranstime = ra_retranstime;
        }
 
        if ((c = tb[IFACE_ATTR_RA_HOPLIMIT])) {
-               iface->ra_hoplimit = blobmsg_get_u32(c);
-               if (iface->ra_hoplimit > 255)
+               uint32_t ra_hoplimit = blobmsg_get_u32(c);
+               if (ra_hoplimit > 255)
                        goto err;
+
+               iface->ra_hoplimit = ra_hoplimit;
        }
 
        if ((c = tb[IFACE_ATTR_RA_MTU])) {
@@ -808,7 +839,6 @@ void odhcpd_reload(void)
                        close_interface(i);
        }
 
-       ndp_handle_addr6_dump();
        uci_unload(uci, dhcp);
        uci_free_context(uci);
 }