nterface-ip: remove superfluous iface check in interface_ip_set_enabled()
[project/netifd.git] / proto.c
diff --git a/proto.c b/proto.c
index d8f16b3..6047735 100644 (file)
--- a/proto.c
+++ b/proto.c
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2012 Steven Barth <steven@midlink.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <limits.h>
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
 
 #include "netifd.h"
+#include "system.h"
 #include "interface.h"
+#include "interface-ip.h"
 #include "proto.h"
 
 static struct avl_tree handlers;
 
+enum {
+       OPT_IPADDR,
+       OPT_IP6ADDR,
+       OPT_NETMASK,
+       OPT_BROADCAST,
+       OPT_PTPADDR,
+       OPT_GATEWAY,
+       OPT_IP6GW,
+       OPT_IP6PREFIX,
+       OPT_IP6DEPRECATED,
+       __OPT_MAX,
+};
+
+static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
+       [OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
+       [OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
+       [OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
+       [OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
+       [OPT_PTPADDR] = { .name = "ptpaddr", .type = BLOBMSG_TYPE_STRING },
+       [OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
+       [OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
+       [OPT_IP6PREFIX] = { .name = "ip6prefix", .type = BLOBMSG_TYPE_ARRAY },
+       [OPT_IP6DEPRECATED] = { .name = "ip6deprecated", .type = BLOBMSG_TYPE_BOOL },
+};
+
+static const struct uci_blob_param_info proto_ip_attr_info[__OPT_MAX] = {
+       [OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
+       [OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
+       [OPT_IP6PREFIX] = { .type = BLOBMSG_TYPE_STRING },
+};
+
+static const char * const proto_ip_validate[__OPT_MAX] = {
+       [OPT_IPADDR] = "ip4addr",
+       [OPT_IP6ADDR] = "ip6addr",
+       [OPT_NETMASK] = "netmask",
+       [OPT_BROADCAST] = "ipaddr",
+       [OPT_PTPADDR] = "ip4addr",
+       [OPT_GATEWAY] = "ip4addr",
+       [OPT_IP6GW] = "ip6addr",
+       [OPT_IP6PREFIX] = "ip6addr",
+};
+
+const struct uci_blob_param_list proto_ip_attr = {
+       .n_params = __OPT_MAX,
+       .params = proto_ip_attributes,
+       .validate = proto_ip_validate,
+       .info = proto_ip_attr_info,
+};
+
+enum {
+       ADDR_IPADDR,
+       ADDR_MASK,
+       ADDR_BROADCAST,
+       ADDR_PTP,
+       ADDR_PREFERRED,
+       ADDR_VALID,
+       ADDR_OFFLINK,
+       ADDR_CLASS,
+       __ADDR_MAX
+};
+
+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 },
+       [ADDR_CLASS] = { .name = "class", .type = BLOBMSG_TYPE_STRING },
+};
+
+static struct device_addr *
+alloc_device_addr(bool v6, bool ext)
+{
+       struct device_addr *addr;
+
+       addr = calloc(1, sizeof(*addr));
+       if (!addr)
+               return NULL;
+
+       addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
+       if (ext)
+               addr->flags |= DEVADDR_EXTERNAL;
+
+       return addr;
+}
+
+static bool
+parse_addr(struct interface *iface, const char *str, bool v6, int mask,
+          bool ext, uint32_t broadcast, uint32_t ptp, bool deprecated)
+{
+       struct device_addr *addr;
+       int af = v6 ? AF_INET6 : AF_INET;
+
+       addr = alloc_device_addr(v6, ext);
+       if (!addr)
+               return false;
+
+       addr->mask = mask;
+       if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask))
+               goto error;
+
+       if (!v6) {
+               if (IN_EXPERIMENTAL(ntohl(addr->addr.in.s_addr)))
+                       goto error;
+
+       } else if (IN6_IS_ADDR_MULTICAST(&addr->addr.in6))
+               goto error;
+
+       if (broadcast)
+               addr->broadcast = broadcast;
+
+       if (ptp)
+               addr->point_to_point = ptp;
+
+       if (deprecated)
+               addr->preferred_until = system_get_rtime();
+
+       vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
+       return true;
+
+error:
+       interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
+       free(addr);
+
+       return false;
+}
+
+static int
+parse_static_address_option(struct interface *iface, struct blob_attr *attr,
+                           bool v6, int netmask, bool ext, uint32_t broadcast,
+                           uint32_t ptp, bool deprecated)
+{
+       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_addr(iface, blobmsg_data(cur), v6, netmask, ext,
+                               broadcast, ptp, deprecated))
+                       return -1;
+       }
+
+       return n_addr;
+}
+
+static struct device_addr *
+parse_address_item(struct blob_attr *attr, bool v6, bool ext)
+{
+       struct device_addr *addr;
+       struct blob_attr *tb[__ADDR_MAX];
+       struct blob_attr *cur;
+
+       if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
+               return NULL;
+
+       addr = alloc_device_addr(v6, ext);
+       if (!addr)
+               return NULL;
+
+       blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
+
+       addr->mask = v6 ? 128 : 32;
+       if ((cur = tb[ADDR_MASK])) {
+               unsigned int new_mask;
+
+               new_mask = parse_netmask_string(blobmsg_data(cur), v6);
+               if (new_mask > addr->mask)
+                       goto error;
+
+               addr->mask = new_mask;
+       }
+
+       cur = tb[ADDR_IPADDR];
+       if (!cur)
+               goto error;
+
+       if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
+               goto error;
+
+       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])) {
+                       int64_t preferred = blobmsg_get_u32(cur);
+                       int64_t preferred_until = preferred + (int64_t)now;
+                       if (preferred_until <= LONG_MAX && preferred != 0xffffffffLL)
+                               addr->preferred_until = preferred_until;
+               }
+
+               if ((cur = tb[ADDR_VALID])) {
+                       int64_t valid = blobmsg_get_u32(cur);
+                       int64_t valid_until = valid + (int64_t)now;
+                       if (valid_until <= LONG_MAX && valid != 0xffffffffLL)
+                               addr->valid_until = valid_until;
+
+               }
+
+               if (addr->valid_until) {
+                       if (!addr->preferred_until)
+                               addr->preferred_until = addr->valid_until;
+                       else if (addr->preferred_until > addr->valid_until)
+                               goto error;
+               }
+
+               if ((cur = tb[ADDR_CLASS]))
+                       addr->pclass = strdup(blobmsg_get_string(cur));
+       }
+
+       return addr;
+
+error:
+       free(addr);
+       return NULL;
+}
+
+static int
+parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
+                  bool ext)
+{
+       struct device_addr *addr;
+       struct blob_attr *cur;
+       int n_addr = 0;
+       int rem;
+
+       blobmsg_for_each_attr(cur, attr, rem) {
+               addr = parse_address_item(cur, v6, ext);
+               if (!addr)
+                       return -1;
+
+               n_addr++;
+               vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
+       }
+
+       return n_addr;
+}
+
+static bool
+parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
+{
+       struct device_route *route;
+       const char *str = blobmsg_data(attr);
+       int af = v6 ? AF_INET6 : AF_INET;
+
+       route = calloc(1, sizeof(*route));
+       if (!route)
+               return NULL;
+
+       if (!inet_pton(af, str, &route->nexthop)) {
+               interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
+               free(route);
+               return false;
+       }
+
+       route->mask = 0;
+       route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
+       route->metric = iface->metric;
+
+       unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
+       if (table) {
+               route->table = table;
+               route->flags |= DEVROUTE_SRCTABLE;
+       }
+
+       vlist_add(&iface->proto_ip.route, &route->node, route);
+
+       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);
+       char *addstr = (!validstr) ? NULL : strtok_r(NULL, ",", &saveptr);
+       const char *pclass = NULL;
+
+       int64_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
+       int64_t valid = (!validstr) ? 0 : strtoul(validstr, NULL, 10);
+
+       uint8_t length = strtoul(lengthstr, NULL, 10), excl_length = 0;
+       if (length < 1 || length > 64)
+               return false;
+
+       struct in6_addr addr, excluded, *excludedp = NULL;
+       if (inet_pton(AF_INET6, addrstr, &addr) < 1)
+               return false;
+
+       for (; addstr; addstr = strtok_r(NULL, ",", &saveptr)) {
+               char *key = NULL, *val = NULL, *addsaveptr;
+               if (!(key = strtok_r(addstr, "=", &addsaveptr)) ||
+                               !(val = strtok_r(NULL, ",", &addsaveptr)))
+                       continue;
+
+               if (!strcmp(key, "excluded")) {
+                       char *sep = strchr(val, '/');
+                       if (!sep)
+                               return false;
+
+                       *sep = 0;
+                       excl_length = atoi(sep + 1);
+
+                       if (inet_pton(AF_INET6, val, &excluded) < 1)
+                               return false;
+
+                       excludedp = &excluded;
+               } else if (!strcmp(key, "class")) {
+                       pclass = val;
+               }
+
+       }
+
+
+
+
+       int64_t now = system_get_rtime();
+       time_t preferred_until = 0;
+       if (prefstr && pref != 0xffffffffLL && pref + now <= LONG_MAX)
+               preferred_until = pref + now;
+
+       time_t valid_until = 0;
+       if (validstr && valid != 0xffffffffLL && valid + now <= LONG_MAX)
+               valid_until = valid + now;
+
+       interface_ip_add_device_prefix(iface, &addr, length,
+                       valid_until, preferred_until,
+                       excludedp, excl_length, pclass);
+       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)
+{
+       struct blob_attr *tb[__OPT_MAX];
+       struct blob_attr *cur;
+       const char *error;
+       unsigned int netmask = 32;
+       bool ip6deprecated;
+       int n_v4 = 0, n_v6 = 0;
+       struct in_addr bcast = {}, ptp = {};
+
+       blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
+
+       if ((cur = tb[OPT_NETMASK])) {
+               netmask = parse_netmask_string(blobmsg_data(cur), false);
+               if (netmask > 32) {
+                       error = "INVALID_NETMASK";
+                       goto error;
+               }
+       }
+
+       if ((cur = tb[OPT_BROADCAST])) {
+               if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
+                       error = "INVALID_BROADCAST";
+                       goto error;
+               }
+       }
+
+       if ((cur = tb[OPT_PTPADDR])) {
+               if (!inet_pton(AF_INET, blobmsg_data(cur), &ptp)) {
+                       error = "INVALID_PTPADDR";
+                       goto error;
+               }
+       }
+
+       ip6deprecated = blobmsg_get_bool_default(tb[OPT_IP6DEPRECATED], false);
+
+       if ((cur = tb[OPT_IPADDR]))
+               n_v4 = parse_static_address_option(iface, cur, false,
+                       netmask, false, bcast.s_addr, ptp.s_addr, false);
+
+       if ((cur = tb[OPT_IP6ADDR]))
+               n_v6 = parse_static_address_option(iface, cur, true,
+                       128, false, 0, 0, ip6deprecated);
+
+       if ((cur = tb[OPT_IP6PREFIX]))
+               if (parse_prefix_list(iface, cur) < 0)
+                       goto out;
+
+       if (n_v4 < 0 || n_v6 < 0)
+               goto out;
+
+       if ((cur = tb[OPT_GATEWAY])) {
+               if (n_v4 && !parse_gateway_option(iface, cur, false))
+                       goto out;
+       }
+
+       if ((cur = tb[OPT_IP6GW])) {
+               if (n_v6 && !parse_gateway_option(iface, cur, true))
+                       goto out;
+       }
+
+       return 0;
+
+error:
+       interface_add_error(iface, "proto", error, NULL, 0);
+out:
+       return -1;
+}
+
+int
+proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
+{
+       struct blob_attr *tb[__OPT_MAX];
+       struct blob_attr *cur;
+       int n_v4 = 0, n_v6 = 0;
+
+       blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
+
+       if ((cur = tb[OPT_IPADDR]))
+               n_v4 = parse_address_list(iface, cur, false, ext);
+
+       if ((cur = tb[OPT_IP6ADDR]))
+               n_v6 = parse_address_list(iface, cur, true, ext);
+
+       if ((cur = tb[OPT_IP6PREFIX]))
+               if (parse_prefix_list(iface, cur) < 0)
+                       goto out;
+
+       if (n_v4 < 0 || n_v6 < 0)
+               goto out;
+
+       if ((cur = tb[OPT_GATEWAY])) {
+               if (n_v4 && !parse_gateway_option(iface, cur, false))
+                       goto out;
+       }
+
+       if ((cur = tb[OPT_IP6GW])) {
+               if (n_v6 && !parse_gateway_option(iface, cur, true))
+                       goto out;
+       }
+
+       return 0;
+
+out:
+       return -1;
+}
+
 void add_proto_handler(struct proto_handler *p)
 {
        if (!handlers.comp)
@@ -47,6 +552,9 @@ default_proto_attach(const struct proto_handler *h,
        struct interface_proto_state *proto;
 
        proto = calloc(1, sizeof(*proto));
+       if (!proto)
+               return NULL;
+
        proto->free = default_proto_free;
        proto->cb = no_proto_handler;
 
@@ -74,14 +582,45 @@ 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) {
+               void *v;
+
+               c = blobmsg_open_table(b, p->name);
+               if (p->config_params && p->config_params->validate) {
+                       int i;
+
+                       v = blobmsg_open_table(b, "validate");
+                       for (i = 0; i < p->config_params->n_params; i++)
+                               blobmsg_add_string(b, p->config_params->params[i].name, uci_get_validate_string(p->config_params, i));
+                       blobmsg_close_table(b, v);
+               }
+               blobmsg_add_u8(b, "immediate", !!(p->flags & PROTO_FLAG_IMMEDIATE));
+               blobmsg_add_u8(b, "no_device", !!(p->flags & PROTO_FLAG_NODEV));
+               blobmsg_add_u8(b, "init_available", !!(p->flags & PROTO_FLAG_INIT_AVAILABLE));
+               blobmsg_add_u8(b, "renew_available", !!(p->flags & PROTO_FLAG_RENEW_AVAILABLE));
+               blobmsg_add_u8(b, "force_link_default", !!(p->flags & PROTO_FLAG_FORCE_LINK_DEFAULT));
+               blobmsg_add_u8(b, "last_error", !!(p->flags & PROTO_FLAG_LASTERROR));
+               blobmsg_add_u8(b, "teardown_on_l3_link_down", !!(p->flags & PROTO_FLAG_TEARDOWN_ON_L3_LINK_DOWN));
+               blobmsg_add_u8(b, "no_task", !!(p->flags & PROTO_FLAG_NO_TASK));
+               blobmsg_close_table(b, c);
+       }
+}
+
+void
 proto_init_interface(struct interface *iface, struct blob_attr *attr)
 {
        const struct proto_handler *proto = iface->proto_handler;
        struct interface_proto_state *state = NULL;
 
-       if (proto)
-               state = proto->attach(proto, iface, attr);
+       if (!proto)
+               proto = &no_proto;
 
+       state = proto->attach(proto, iface, attr);
        if (!state) {
                state = no_proto.attach(&no_proto, iface, attr);
                state->cb = invalid_proto_handler;
@@ -94,25 +633,28 @@ proto_init_interface(struct interface *iface, struct blob_attr *attr)
 void
 proto_attach_interface(struct interface *iface, const char *proto_name)
 {
-       const struct proto_handler *proto = NULL;
+       const struct proto_handler *proto = &no_proto;
+       const char *error = NULL;
 
-       if (!proto_name) {
-               interface_add_error(iface, "proto", "NO_PROTO", NULL, 0);
-               return;
+       if (proto_name) {
+               proto = get_proto_handler(proto_name);
+               if (!proto) {
+                       error = "INVALID_PROTO";
+                       proto = &no_proto;
+               }
        }
 
-       proto = get_proto_handler(proto_name);
-       if (!proto)
-               interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
-
        iface->proto_handler = proto;
+
+       if (error)
+               interface_add_error(iface, "proto", error, NULL, 0);
 }
 
 int
 interface_proto_event(struct interface_proto_state *proto,
                      enum interface_proto_cmd cmd, bool force)
 {
-       enum interface_event ev;
+       enum interface_proto_event ev;
        int ret;
 
        ret = proto->cb(proto, cmd, force);
@@ -121,10 +663,13 @@ interface_proto_event(struct interface_proto_state *proto,
 
        switch(cmd) {
        case PROTO_CMD_SETUP:
-               ev = IFEV_UP;
+               ev = IFPEV_UP;
                break;
        case PROTO_CMD_TEARDOWN:
-               ev = IFEV_DOWN;
+               ev = IFPEV_DOWN;
+               break;
+       case PROTO_CMD_RENEW:
+               ev = IFPEV_RENEW;
                break;
        default:
                return -EINVAL;