router: Add PREF64 (RFC 8781) support

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

diff --git a/src/config.c b/src/config.c
index 30fdc309bbb9f03c8579a70deb5378e0be048c4f..d7cd5dd0aa9c87427698a6d0c94b0ed120e49910 100644 (file)
--- a/src/config.c
+++ b/src/config.c
@@ -82,6 +82,7 @@ enum {
        IFACE_ATTR_RA_HOPLIMIT,
        IFACE_ATTR_RA_MTU,
        IFACE_ATTR_RA_DNS,
+       IFACE_ATTR_RA_PREF64,
        IFACE_ATTR_PD_MANAGER,
        IFACE_ATTR_PD_CER,
        IFACE_ATTR_NDPROXY_ROUTING,
@@ -135,6 +136,7 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
        [IFACE_ATTR_RA_HOPLIMIT] = { .name = "ra_hoplimit", .type = BLOBMSG_TYPE_INT32 },
        [IFACE_ATTR_RA_MTU] = { .name = "ra_mtu", .type = BLOBMSG_TYPE_INT32 },
        [IFACE_ATTR_RA_DNS] = { .name = "ra_dns", .type = BLOBMSG_TYPE_BOOL },
+       [IFACE_ATTR_RA_PREF64] = { .name = "ra_pref64", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
        [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
        [IFACE_ATTR_PREFIX_FILTER] = { .name = "prefix_filter", .type = BLOBMSG_TYPE_STRING },
@@ -958,6 +960,24 @@ int config_parse_interface(void *data, size_t len, const char *name, bool overwr
        if ((c = tb[IFACE_ATTR_RA_DNS]))
                iface->ra_dns = blobmsg_get_bool(c);
 
+       if ((c = tb[IFACE_ATTR_RA_PREF64])) {
+               const char *str = blobmsg_get_string(c);
+               char *astr = malloc(strlen(str) + 1);
+               char *delim;
+               int l;
+
+               if (!astr || !strcpy(astr, str) ||
+                               (delim = strchr(astr, '/')) == NULL || (*(delim++) = 0) ||
+                               sscanf(delim, "%i", &l) == 0 || l > 128 ||
+                               inet_pton(AF_INET6, astr, &iface->pref64_addr) == 0)
+                       iface->pref64_length = 0;
+               else
+                       iface->pref64_length = l;
+
+               if (astr)
+                       free(astr);
+       }
+
        if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
                const char *prio = blobmsg_get_string(c);