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netconfig: Subscribe for IPv6 address changes

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The IPv6 addresses changes are maintained in ifaddr_list.
This commit is contained in:
Tim Kourt 2019-10-01 16:44:21 -07:00 committed by Denis Kenzior
parent 50a112e425
commit 577e638be3
1 changed files with 92 additions and 0 deletions
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92
src/netconfig.c
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@ -224,6 +224,23 @@ static char **netconfig_ipv4_get_dns(struct netconfig *netconfig, uint8_t proto)
return NULL;
}
static bool netconfig_ifaddr_match(const void *a, const void *b)
{
const struct netconfig_ifaddr *entry = a;
const struct netconfig_ifaddr *query = b;
if (entry->family != query->family)
return false;
if (entry->prefix_len != query->prefix_len)
return false;
if (strcmp(entry->ip, query->ip))
return false;
return true;
}
static struct netconfig_ifaddr *netconfig_ifaddr_find(
const struct netconfig *netconfig,
uint8_t family, uint8_t prefix_len,
@ -335,6 +352,73 @@ static void netconfig_ifaddr_cmd_cb(int error, uint16_t type,
netconfig_ifaddr_notify(type, data, len, user_data);
}
static void netconfig_ifaddr_ipv6_added(struct netconfig *netconfig,
const struct ifaddrmsg *ifa,
uint32_t len)
{
struct netconfig_ifaddr *ifaddr;
ifaddr = l_new(struct netconfig_ifaddr, 1);
ifaddr->family = ifa->ifa_family;
ifaddr->prefix_len = ifa->ifa_prefixlen;
rtnl_ifaddr_ipv6_extract(ifa, len, &ifaddr->ip);
l_debug("ifindex %u: ifaddr %s/%u", netconfig->ifindex, ifaddr->ip,
ifaddr->prefix_len);
l_queue_push_tail(netconfig->ifaddr_list, ifaddr);
}
static void netconfig_ifaddr_ipv6_deleted(struct netconfig *netconfig,
const struct ifaddrmsg *ifa,
uint32_t len)
{
struct netconfig_ifaddr *ifaddr;
struct netconfig_ifaddr query;
rtnl_ifaddr_ipv6_extract(ifa, len, &query.ip);
query.family = ifa->ifa_family;
query.prefix_len = ifa->ifa_prefixlen;
ifaddr = l_queue_remove_if(netconfig->ifaddr_list,
netconfig_ifaddr_match, &query);
l_free(query.ip);
if (!ifaddr)
return;
l_debug("ifaddr %s/%u", ifaddr->ip, ifaddr->prefix_len);
netconfig_ifaddr_destroy(ifaddr);
}
static void netconfig_ifaddr_ipv6_notify(uint16_t type, const void *data,
uint32_t len, void *user_data)
{
const struct ifaddrmsg *ifa = data;
struct netconfig *netconfig;
uint32_t bytes;
netconfig = netconfig_find(ifa->ifa_index);
if (!netconfig)
/* Ignore the interfaces which aren't managed by iwd. */
return;
bytes = len - NLMSG_ALIGN(sizeof(struct ifaddrmsg));
switch (type) {
case RTM_NEWADDR:
netconfig_ifaddr_ipv6_added(netconfig, ifa, bytes);
break;
case RTM_DELADDR:
netconfig_ifaddr_ipv6_deleted(netconfig, ifa, bytes);
break;
}
}
static void netconfig_route_cmd_cb(int error, uint16_t type,
const void *data, uint32_t len,
void *user_data)
@ -740,6 +824,14 @@ static int netconfig_init(void)
goto error;
}
r = l_netlink_register(rtnl, RTNLGRP_IPV6_IFADDR,
netconfig_ifaddr_ipv6_notify, NULL, NULL);
if (!r) {
l_error("netconfig: Failed to register for RTNL link IPv6 "
"address notifications.");
goto error;
}
if (!l_settings_get_uint(iwd_get_config(), "General",
"route_priority_offset",
&ROUTE_PRIORITY_OFFSET))