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netconfig: Add IPv6 static address installation/removal

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The network configuration options for IPv6 are grouped under [IPv6]
and include the following:
	ip= ADDRESS/PREFIX
	gateway=ADDRESS
	dns=ADDRESS

The placeholders for DHCPv6 are placed along the way and marked
as TODO items.
This commit is contained in:
Tim Kourt 2019-10-01 16:44:23 -07:00 committed by Denis Kenzior
parent 0a293ef538
commit ce5e481239
1 changed files with 149 additions and 8 deletions
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157
src/netconfig.c
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@ -48,6 +48,7 @@ struct netconfig {
struct l_dhcp_client *dhcp_client;
struct l_queue *ifaddr_list;
uint8_t rtm_protocol;
uint8_t rtm_v6_protocol;
const struct l_settings *active_settings;
};
@ -224,6 +225,67 @@ static char **netconfig_ipv4_get_dns(struct netconfig *netconfig, uint8_t proto)
return NULL;
}
static struct netconfig_ifaddr *netconfig_ipv6_get_ifaddr(
struct netconfig *netconfig,
uint8_t proto)
{
struct in6_addr in6_addr;
struct netconfig_ifaddr *ifaddr;
char *ip;
char *p;
switch (proto) {
case RTPROT_STATIC:
ip = l_settings_get_string(netconfig->active_settings, "IPv6",
"ip");
if (!ip)
return NULL;
ifaddr = l_new(struct netconfig_ifaddr, 1);
ifaddr->ip = ip;
p = strrchr(ifaddr->ip, '/');
if (!p)
goto no_prefix_len;
*p = '\0';
if (inet_pton(AF_INET6, ifaddr->ip, &in6_addr) < 1) {
l_error("netconfig: Invalid IPv6 address %s is "
"provided in network configuration file.",
ifaddr->ip);
netconfig_ifaddr_destroy(ifaddr);
return NULL;
}
if (*++p == '\0')
goto no_prefix_len;
ifaddr->prefix_len = strtoul(p, NULL, 10);
if (!unlikely(errno == EINVAL || errno == ERANGE ||
!ifaddr->prefix_len ||
ifaddr->prefix_len > 128))
goto proceed;
no_prefix_len:
ifaddr->prefix_len = 128;
proceed:
ifaddr->family = AF_INET6;
return ifaddr;
case RTPROT_DHCP:
/* TODO */
return NULL;
}
return NULL;
}
static bool netconfig_ifaddr_match(const void *a, const void *b)
{
const struct netconfig_ifaddr *entry = a;
@ -541,6 +603,19 @@ done:
netconfig_ifaddr_destroy(ifaddr);
}
static void netconfig_ipv6_ifaddr_add_cmd_cb(int error, uint16_t type,
const void *data, uint32_t len,
void *user_data)
{
if (error && error != -EEXIST) {
l_error("netconfig: Failed to add IPv6 address. "
"Error %d: %s", error, strerror(-error));
return;
}
/* TODO Install routes and DNS */
}
static void netconfig_install_address(struct netconfig *netconfig,
struct netconfig_ifaddr *ifaddr)
{
@ -560,6 +635,16 @@ static void netconfig_install_address(struct netconfig *netconfig,
l_error("netconfig: Failed to set IP %s/%u.", ifaddr->ip,
ifaddr->prefix_len);
break;
case AF_INET6:
if (rtnl_ifaddr_ipv6_add(rtnl, netconfig->ifindex,
ifaddr->prefix_len, ifaddr->ip,
netconfig_ipv6_ifaddr_add_cmd_cb,
netconfig, NULL))
return;
l_error("netconfig: Failed to set IPv6 address %s/%u.",
ifaddr->ip, ifaddr->prefix_len);
break;
default:
l_error("netconfig: Unsupported address family: %u",
ifaddr->family);
@ -606,6 +691,16 @@ static void netconfig_uninstall_address(struct netconfig *netconfig,
l_error("netconfig: Failed to delete IP %s/%u.",
ifaddr->ip, ifaddr->prefix_len);
break;
case AF_INET6:
if (rtnl_ifaddr_ipv6_delete(rtnl, netconfig->ifindex,
ifaddr->prefix_len, ifaddr->ip,
netconfig_ifaddr_del_cmd_cb, netconfig,
NULL))
return;
l_error("netconfig: Failed to delete IPv6 address %s/%u.",
ifaddr->ip, ifaddr->prefix_len);
break;
default:
l_error("netconfig: Unsupported address family: %u",
ifaddr->family);
@ -717,6 +812,49 @@ static void netconfig_ipv4_select_and_uninstall(struct netconfig *netconfig)
l_dhcp_client_stop(netconfig->dhcp_client);
}
static void netconfig_ipv6_select_and_install(struct netconfig *netconfig)
{
struct netconfig_ifaddr *ifaddr;
ifaddr = netconfig_ipv6_get_ifaddr(netconfig, RTPROT_STATIC);
if (ifaddr) {
netconfig->rtm_v6_protocol = RTPROT_STATIC;
netconfig_install_address(netconfig, ifaddr);
netconfig_ifaddr_destroy(ifaddr);
return;
}
/*
* TODO
*
* netconfig->rtm_v6_protocol = RTPROT_DHCP;
*
* if (l_dhcp_v6_client_start(netconfig->l_dhcp_v6_client))
* return;
*
* l_error("netconfig: Failed to start DHCPv6 client for "
* "interface %u", netconfig->ifindex);
*/
}
static void netconfig_ipv6_select_and_uninstall(struct netconfig *netconfig)
{
struct netconfig_ifaddr *ifaddr;
ifaddr = netconfig_ipv6_get_ifaddr(netconfig,
netconfig->rtm_v6_protocol);
if (ifaddr) {
netconfig_uninstall_address(netconfig, ifaddr);
netconfig_ifaddr_destroy(ifaddr);
}
/*
* TODO
* l_dhcp_v6_client_stop(netconfig->l_dhcp_v6_client);
*/
}
bool netconfig_configure(struct netconfig *netconfig,
const struct l_settings *active_settings,
const uint8_t *mac_address)
@ -728,7 +866,7 @@ bool netconfig_configure(struct netconfig *netconfig,
netconfig_ipv4_select_and_install(netconfig);
/* TODO: IPv6 addressing */
netconfig_ipv6_select_and_install(netconfig);
return true;
}
@ -739,7 +877,9 @@ bool netconfig_reconfigure(struct netconfig *netconfig)
/* TODO l_dhcp_client sending a DHCP inform request */
}
/* TODO: IPv6 addressing */
if (netconfig->rtm_v6_protocol == RTPROT_DHCP) {
/* TODO l_dhcp_v6_client sending a DHCP inform request */
}
return true;
}
@ -747,13 +887,13 @@ bool netconfig_reconfigure(struct netconfig *netconfig)
bool netconfig_reset(struct netconfig *netconfig)
{
netconfig_ipv4_select_and_uninstall(netconfig);
netconfig->rtm_protocol = 0;
/* TODO: IPv6 addressing */
netconfig_ipv6_select_and_uninstall(netconfig);
netconfig->rtm_v6_protocol = 0;
resolve_remove(netconfig->ifindex);
netconfig->rtm_protocol = 0;
return true;
}
@ -790,13 +930,14 @@ void netconfig_destroy(struct netconfig *netconfig)
l_queue_remove(netconfig_list, netconfig);
if (netconfig->rtm_protocol) {
if (netconfig->rtm_protocol)
netconfig_ipv4_select_and_uninstall(netconfig);
/* TODO Uninstall IPv6 addresses. */
if (netconfig->rtm_v6_protocol)
netconfig_ipv6_select_and_uninstall(netconfig);
if (netconfig->rtm_protocol || netconfig->rtm_v6_protocol)
resolve_remove(netconfig->ifindex);
}
netconfig_free(netconfig);
}