proto: default to 128 instead of the "netmask" option for ipv6 addresses
[project/netifd.git] / proto.c
diff --git a/proto.c b/proto.c
index ed0a008..3d611a2 100644 (file)
--- a/proto.c
+++ b/proto.c
@@ -19,6 +19,7 @@
 #include <netinet/in.h>
 
 #include "netifd.h"
+#include "system.h"
 #include "interface.h"
 #include "interface-ip.h"
 #include "proto.h"
@@ -32,8 +33,8 @@ enum {
        OPT_BROADCAST,
        OPT_GATEWAY,
        OPT_IP6GW,
-       OPT_DNS,
-       OPT_DNS_SEARCH,
+       OPT_IP6PREFIX,
+       OPT_IP6ASSIGN,
        __OPT_MAX,
 };
 
@@ -44,14 +45,14 @@ static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
        [OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
        [OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
        [OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
-       [OPT_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
-       [OPT_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
+       [OPT_IP6PREFIX] = { .name = "ip6prefix", .type = BLOBMSG_TYPE_ARRAY },
+       [OPT_IP6ASSIGN] = { .name = "ip6assign", .type = BLOBMSG_TYPE_INT32 },
 };
 
 static const union config_param_info proto_ip_attr_info[__OPT_MAX] = {
        [OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
        [OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
-       [OPT_DNS] = { .type = BLOBMSG_TYPE_STRING },
+       [OPT_IP6PREFIX] = { .type = BLOBMSG_TYPE_STRING },
 };
 
 const struct config_param_list proto_ip_attr = {
@@ -64,6 +65,10 @@ enum {
        ADDR_IPADDR,
        ADDR_MASK,
        ADDR_BROADCAST,
+       ADDR_PTP,
+       ADDR_PREFERRED,
+       ADDR_VALID,
+       ADDR_OFFLINK,
        __ADDR_MAX
 };
 
@@ -71,68 +76,12 @@ static const struct blobmsg_policy proto_ip_addr[__ADDR_MAX] = {
        [ADDR_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_STRING },
        [ADDR_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
        [ADDR_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
+       [ADDR_PTP] = { .name = "ptp", .type = BLOBMSG_TYPE_STRING },
+       [ADDR_PREFERRED] = { .name = "preferred", .type = BLOBMSG_TYPE_INT32 },
+       [ADDR_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
+       [ADDR_OFFLINK] = { .name = "offlink", .type = BLOBMSG_TYPE_BOOL },
 };
 
-unsigned int
-parse_netmask_string(const char *str, bool v6)
-{
-       struct in_addr addr;
-       unsigned int ret;
-       char *err = NULL;
-
-       if (!strchr(str, '.')) {
-               ret = strtoul(str, &err, 0);
-               if (err && *err)
-                       goto error;
-
-               return ret;
-       }
-
-       if (v6)
-               goto error;
-
-       if (inet_aton(str, &addr) != 1)
-               goto error;
-
-       return 32 - fls(~(ntohl(addr.s_addr)));
-
-error:
-       return ~0;
-}
-
-static bool
-split_netmask(char *str, unsigned int *netmask, bool v6)
-{
-       char *delim = strchr(str, '/');
-
-       if (delim) {
-               *(delim++) = 0;
-
-               *netmask = parse_netmask_string(delim, v6);
-       }
-       return true;
-}
-
-static int
-parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask)
-{
-       char *astr = alloca(strlen(str) + 1);
-
-       strcpy(astr, str);
-       if (!split_netmask(astr, netmask, af == AF_INET6))
-               return 0;
-
-       if (af == AF_INET6) {
-               if (*netmask > 128)
-                       return 0;
-       } else {
-               if (*netmask > 32)
-                       return 0;
-       }
-
-       return inet_pton(af, astr, addr);
-}
-
 static struct device_addr *
 alloc_device_addr(bool v6, bool ext)
 {
@@ -226,9 +175,37 @@ parse_address_item(struct blob_attr *attr, bool v6, bool ext)
        if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
                goto error;
 
-       if (!v6 && (cur = tb[ADDR_BROADCAST])) {
-               if (!inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
+       if ((cur = tb[ADDR_OFFLINK]) && blobmsg_get_bool(cur))
+               addr->flags |= DEVADDR_OFFLINK;
+
+       if (!v6) {
+               if ((cur = tb[ADDR_BROADCAST]) &&
+                   !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
+                       goto error;
+               if ((cur = tb[ADDR_PTP]) &&
+                   !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
                        goto error;
+       } else {
+               time_t now = system_get_rtime();
+               if ((cur = tb[ADDR_PREFERRED])) {
+                       uint32_t preferred = blobmsg_get_u32(cur);
+                       if (preferred < UINT32_MAX)
+                               addr->preferred_until = now + preferred;
+               }
+
+               if ((cur = tb[ADDR_VALID])) {
+                       uint32_t valid = blobmsg_get_u32(cur);
+                       if (valid < UINT32_MAX)
+                               addr->valid_until = now + valid;
+
+               }
+
+               if (addr->valid_until) {
+                       if (!addr->preferred_until)
+                               addr->preferred_until = addr->valid_until;
+                       else if (addr->preferred_until > addr->valid_until)
+                               goto error;
+               }
        }
 
        return addr;
@@ -280,6 +257,89 @@ parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
        return true;
 }
 
+static bool
+parse_ip6assign_option(struct interface *iface, struct blob_attr *attr)
+{
+       uint8_t oldval = iface->proto_ip.assignment_length;
+       uint8_t newval = blobmsg_get_u32(attr);
+
+       struct device_prefix *prefix;
+       list_for_each_entry(prefix, &prefixes, head) {
+               if (oldval && oldval != newval)
+                       interface_ip_set_prefix_assignment(prefix, iface, 0);
+
+               if (newval && newval <= 64)
+                       interface_ip_set_prefix_assignment(prefix, iface, newval);
+       }
+
+       iface->proto_ip.assignment_length = newval;
+       return true;
+}
+
+static bool
+parse_prefix_option(struct interface *iface, const char *str, size_t len)
+{
+       char buf[128] = {0}, *saveptr;
+       if (len > sizeof(buf))
+               return false;
+
+       memcpy(buf, str, len);
+       char *addrstr = strtok_r(buf, "/", &saveptr);
+       if (!addrstr)
+               return false;
+
+       char *lengthstr = strtok_r(NULL, ",", &saveptr);
+       if (!lengthstr)
+               return false;
+
+       char *prefstr = strtok_r(NULL, ",", &saveptr);
+       char *validstr = (!prefstr) ? NULL : strtok_r(NULL, ",", &saveptr);
+
+       uint32_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
+       uint32_t valid = (!validstr) ? 0 : strtoul(validstr, NULL, 10);
+
+       uint8_t length = strtoul(lengthstr, NULL, 10);
+       if (length < 1 || length > 64)
+               return false;
+
+       struct in6_addr addr;
+       if (inet_pton(AF_INET6, addrstr, &addr) < 1)
+               return false;
+
+       time_t now = system_get_rtime();
+       time_t preferred_until = 0;
+       if (prefstr && pref != 0xffffffffU)
+               preferred_until = pref + now;
+
+       time_t valid_until = 0;
+       if (validstr && valid != 0xffffffffU)
+               valid_until = valid + now;
+
+       interface_ip_add_device_prefix(iface, &addr, length,
+                       valid_until, preferred_until);
+       return true;
+}
+
+static int
+parse_prefix_list(struct interface *iface, struct blob_attr *attr)
+{
+       struct blob_attr *cur;
+       int n_addr = 0;
+       int rem;
+
+       blobmsg_for_each_attr(cur, attr, rem) {
+               if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+                       return -1;
+
+               n_addr++;
+               if (!parse_prefix_option(iface, blobmsg_data(cur),
+                               blobmsg_data_len(cur)))
+                       return -1;
+       }
+
+       return n_addr;
+}
+
 int
 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
 {
@@ -313,12 +373,11 @@ proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
 
        if ((cur = tb[OPT_IP6ADDR]))
                n_v6 = parse_static_address_option(iface, cur, true,
-                       netmask, false, 0);
+                       128, false, 0);
 
-       if (!n_v4 && !n_v6) {
-               error = "NO_ADDRESS";
-               goto error;
-       }
+       if ((cur = tb[OPT_IP6PREFIX]))
+               if (parse_prefix_list(iface, cur) < 0)
+                       goto out;
 
        if (n_v4 < 0 || n_v6 < 0)
                goto out;
@@ -333,11 +392,9 @@ proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
                        goto out;
        }
 
-       if ((cur = tb[OPT_DNS]))
-               interface_add_dns_server_list(&iface->proto_ip, cur);
-
-       if ((cur = tb[OPT_DNS_SEARCH]))
-               interface_add_dns_search_list(&iface->proto_ip, cur);
+       if ((cur = tb[OPT_IP6ASSIGN]))
+               if (!parse_ip6assign_option(iface, cur))
+                       goto out;
 
        return 0;
 
@@ -352,7 +409,6 @@ proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ex
 {
        struct blob_attr *tb[__OPT_MAX];
        struct blob_attr *cur;
-       const char *error;
        int n_v4 = 0, n_v6 = 0;
 
        blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
@@ -363,10 +419,9 @@ proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ex
        if ((cur = tb[OPT_IP6ADDR]))
                n_v6 = parse_address_list(iface, cur, true, ext);
 
-       if (!n_v4 && !n_v6) {
-               error = "NO_ADDRESS";
-               goto error;
-       }
+       if ((cur = tb[OPT_IP6PREFIX]))
+               if (parse_prefix_list(iface, cur) < 0)
+                       goto out;
 
        if (n_v4 < 0 || n_v6 < 0)
                goto out;
@@ -381,16 +436,12 @@ proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ex
                        goto out;
        }
 
-       if ((cur = tb[OPT_DNS]))
-               interface_add_dns_server_list(&iface->proto_ip, cur);
-
-       if ((cur = tb[OPT_DNS_SEARCH]))
-               interface_add_dns_search_list(&iface->proto_ip, cur);
+       if ((cur = tb[OPT_IP6ASSIGN]))
+               if (!parse_ip6assign_option(iface, cur))
+                       goto out;
 
        return 0;
 
-error:
-       interface_add_error(iface, "proto", error, NULL, 0);
 out:
        return -1;
 }
@@ -461,6 +512,19 @@ get_proto_handler(const char *name)
 }
 
 void
+proto_dump_handlers(struct blob_buf *b)
+{
+       struct proto_handler *p;
+       void *c;
+
+       avl_for_each_element(&handlers, p, avl) {
+               c = blobmsg_open_table(b, p->name);
+               blobmsg_add_u8(b, "no_device", !!(p->flags & PROTO_FLAG_NODEV));
+               blobmsg_close_table(b, c);
+       }
+}
+
+void
 proto_init_interface(struct interface *iface, struct blob_attr *attr)
 {
        const struct proto_handler *proto = iface->proto_handler;