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network: dhcp4: simplify link_set_dns_routes()

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This commit is contained in:
Yu Watanabe 2021-04-12 08:48:29 +09:00
parent ff2cf67740
commit e1c08a3d0a
1 changed files with 52 additions and 53 deletions
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105
src/network/networkd-dhcp4.c
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@ -178,53 +178,6 @@ static int dhcp_route_configure(Route *route, Link *link) {
return 0;
}
static int link_set_dns_routes(Link *link, const struct in_addr *address) {
const struct in_addr *dns;
uint32_t table;
int n, r;
assert(link);
assert(link->dhcp_lease);
assert(link->network);
if (!link->network->dhcp_use_dns ||
!link->network->dhcp_routes_to_dns)
return 0;
n = sd_dhcp_lease_get_dns(link->dhcp_lease, &dns);
if (IN_SET(n, 0, -ENODATA))
return 0;
if (n < 0)
return log_link_warning_errno(link, n, "DHCP error: could not get DNS servers: %m");
table = link_get_dhcp_route_table(link);
for (int i = 0; i < n; i ++) {
_cleanup_(route_freep) Route *route = NULL;
r = route_new(&route);
if (r < 0)
return log_link_error_errno(link, r, "Could not allocate route: %m");
/* Set routes to DNS servers. */
route->family = AF_INET;
route->dst.in = dns[i];
route->dst_prefixlen = 32;
route->prefsrc.in = *address;
route->scope = RT_SCOPE_LINK;
route->protocol = RTPROT_DHCP;
route->priority = link->network->dhcp_route_metric;
route->table = table;
r = dhcp_route_configure(route, link);
if (r < 0)
return log_link_error_errno(link, r, "Could not set route to DNS server: %m");
}
return 0;
}
static bool link_prefixroute(Link *link) {
return !link->network->dhcp_route_table_set ||
link->network->dhcp_route_table == RT_TABLE_MAIN ||
@ -457,8 +410,54 @@ static int link_set_dhcp_gateway(Link *link) {
return 0;
}
static int link_set_dhcp_routes(Link *link) {
static int link_set_dns_routes(Link *link) {
_cleanup_(route_freep) Route *route = NULL;
const struct in_addr *dns;
struct in_addr address;
int n, r;
assert(link);
assert(link->dhcp_lease);
assert(link->network);
if (!link->network->dhcp_use_dns ||
!link->network->dhcp_routes_to_dns)
return 0;
n = sd_dhcp_lease_get_dns(link->dhcp_lease, &dns);
if (IN_SET(n, 0, -ENODATA))
return 0;
if (n < 0)
return n;
r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
if (r < 0)
return r;
r = route_new(&route);
if (r < 0)
return r;
route->family = AF_INET;
route->dst_prefixlen = 32;
route->prefsrc.in = address;
route->scope = RT_SCOPE_LINK;
route->protocol = RTPROT_DHCP;
route->priority = link->network->dhcp_route_metric;
route->table = link_get_dhcp_route_table(link);
for (int i = 0; i < n; i ++) {
route->dst.in = dns[i];
r = dhcp_route_configure(route, link);
if (r < 0)
return r;
}
return 0;
}
static int link_set_dhcp_routes(Link *link) {
Route *rt;
int r;
@ -481,10 +480,6 @@ static int link_set_dhcp_routes(Link *link) {
return log_link_error_errno(link, r, "Failed to store old DHCPv4 route: %m");
}
r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
if (r < 0)
return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");
r = link_set_dhcp_prefix_route(link);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: Could not set prefix route: %m");
@ -500,7 +495,11 @@ static int link_set_dhcp_routes(Link *link) {
return log_link_error_errno(link, r, "DHCP error: Could not set gateway: %m");
}
return link_set_dns_routes(link, &address);
r = link_set_dns_routes(link);
if (r < 0)
return log_link_error_errno(link, r, "DHCP error: Could not set routes to DNS servers: %m");
return 0;
}
static int dhcp_reset_mtu(Link *link) {