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netconfig: Rework static IPv6 address handling

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This patch converts the code to use the new l_rtnl_address class.  The
settings parsing code will now return an l_rtnl_address object which
can be installed directly.

Also, address removal path for static addresses has been removed, since
netconfig_reset() sets disable_ipv6 setting to '1', which will remove
all IPV6 addresses for the interface.
This commit is contained in:
Denis Kenzior 2020-11-19 13:26:03 -06:00
parent b6cf9ef866
commit eb151efc81
1 changed files with 34 additions and 74 deletions
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108
src/netconfig.c
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@ -392,69 +392,42 @@ static char *netconfig_ipv4_get_gateway(struct netconfig *netconfig)
return NULL;
}
static struct netconfig_ifaddr *netconfig_ipv6_get_ifaddr(
struct netconfig *netconfig,
uint8_t proto)
static struct l_rtnl_address *netconfig_get_static6_address(
struct netconfig *netconfig)
{
struct in6_addr in6_addr;
struct netconfig_ifaddr *ifaddr;
char *ip;
L_AUTO_FREE_VAR(char *, ip);
char *p;
struct l_rtnl_address *ret;
uint32_t prefix_len = 128;
switch (proto) {
case RTPROT_STATIC:
ip = l_settings_get_string(netconfig->active_settings, "IPv6",
ip = l_settings_get_string(netconfig->active_settings, "IPv6",
"Address");
if (!ip) {
ip = l_settings_get_string(netconfig->active_settings,
"IPv6", "ip");
if (!ip)
return NULL;
}
if (!ip)
return NULL;
ifaddr = l_new(struct netconfig_ifaddr, 1);
ifaddr->ip = ip;
p = strrchr(ip, '/');
if (!p)
goto no_prefix_len;
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 */
*p = '\0';
if (*++p == '\0')
goto no_prefix_len;
prefix_len = strtoul(p, NULL, 10);
if (!unlikely(errno == EINVAL || errno == ERANGE ||
!prefix_len || prefix_len > 128)) {
l_error("netconfig: Invalid prefix '%s' provided in network"
" configuration file", p);
return NULL;
}
return NULL;
no_prefix_len:
ret = l_rtnl_address_new(ip, prefix_len);
if (!ret)
l_error("netconfig: Invalid IPv6 address %s is "
"provided in network configuration file.", ip);
return ret;
}
static struct l_rtnl_route *netconfig_get_static6_gateway(
@ -1052,7 +1025,7 @@ static void netconfig_ipv4_select_and_uninstall(struct netconfig *netconfig)
static void netconfig_ipv6_select_and_install(struct netconfig *netconfig)
{
struct netdev *netdev = netdev_find(netconfig->ifindex);
struct netconfig_ifaddr *ifaddr;
struct l_rtnl_address *address;
bool enabled;
if (!l_settings_get_bool(netconfig->active_settings, "IPv6",
@ -1066,32 +1039,19 @@ static void netconfig_ipv6_select_and_install(struct netconfig *netconfig)
sysfs_write_ipv6_setting(netdev_get_name(netdev), "disable_ipv6", "0");
ifaddr = netconfig_ipv6_get_ifaddr(netconfig, RTPROT_STATIC);
if (ifaddr) {
address = netconfig_get_static6_address(netconfig);
if (address) {
netconfig->rtm_v6_protocol = RTPROT_STATIC;
netconfig_install_address(netconfig, ifaddr);
netconfig_ifaddr_destroy(ifaddr);
L_WARN_ON(!l_rtnl_ifaddr_add(rtnl, netconfig->ifindex, address,
netconfig_ipv6_ifaddr_add_cmd_cb,
netconfig, NULL));
l_rtnl_address_free(address);
return;
}
netconfig->rtm_v6_protocol = RTPROT_DHCP;
}
static void netconfig_ipv6_select_and_uninstall(struct netconfig *netconfig)
{
struct netconfig_ifaddr *ifaddr;
l_dhcp6_client_stop(netconfig->dhcp6_client);
ifaddr = netconfig_ipv6_get_ifaddr(netconfig,
netconfig->rtm_v6_protocol);
if (ifaddr) {
netconfig_uninstall_address(netconfig, ifaddr);
netconfig_ifaddr_destroy(ifaddr);
}
}
static int validate_dns_list(int family, char **dns_list)
{
unsigned int n_valid = 0;
@ -1192,7 +1152,7 @@ bool netconfig_reset(struct netconfig *netconfig)
netconfig_ipv4_select_and_uninstall(netconfig);
netconfig->rtm_protocol = 0;
netconfig_ipv6_select_and_uninstall(netconfig);
l_dhcp6_client_stop(netconfig->dhcp6_client);
netconfig->rtm_v6_protocol = 0;
resolve_revert(netconfig->resolve);