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sd-dhcp-server: always send out ROUTER and SUBNET_MASK

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For now we simply take these values from the server's address.
This commit is contained in:
Tom Gundersen 2014-08-04 20:57:02 +02:00
parent 72d314c8d8
commit 59b8f6b628
5 changed files with 33 additions and 7 deletions
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1
src/libsystemd-network/dhcp-server-internal.h
View File

@ -55,6 +55,7 @@ struct sd_dhcp_server {
int index;
be32_t address;
be32_t netmask;
be32_t pool_start;
size_t pool_size;
size_t next_offer;

26
src/libsystemd-network/sd-dhcp-server.c
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@ -51,13 +51,16 @@ int sd_dhcp_server_set_lease_pool(sd_dhcp_server *server, struct in_addr *addres
return 0;
}
int sd_dhcp_server_set_address(sd_dhcp_server *server, struct in_addr *address) {
int sd_dhcp_server_set_address(sd_dhcp_server *server, struct in_addr *address, unsigned char prefixlen) {
assert_return(server, -EINVAL);
assert_return(address, -EINVAL);
assert_return(address->s_addr, -EINVAL);
assert_return(prefixlen <= 32, -ERANGE);
assert_return(server->address == htobe32(INADDR_ANY), -EBUSY);
assert_return(server->netmask == htobe32(INADDR_ANY), -EBUSY);
server->address = address->s_addr;
server->netmask = htobe32(0xfffffffflu << (32 - prefixlen));
return 0;
}
@ -150,6 +153,7 @@ int sd_dhcp_server_new(sd_dhcp_server **ret, int ifindex) {
server->fd_raw = -1;
server->fd = -1;
server->address = htobe32(INADDR_ANY);
server->netmask = htobe32(INADDR_ANY);
server->index = ifindex;
server->leases_by_client_id = hashmap_new(client_id_hash_func, client_id_compare_func);
@ -408,6 +412,16 @@ static int server_send_offer(sd_dhcp_server *server, DHCPRequest *req, be32_t ad
if (r < 0)
return r;
r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
DHCP_OPTION_SUBNET_MASK, 4, &server->netmask);
if (r < 0)
return r;
r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
DHCP_OPTION_ROUTER, 4, &server->address);
if (r < 0)
return r;
r = dhcp_server_send_packet(server, req, packet, DHCP_OFFER, offset);
if (r < 0)
return r;
@ -433,6 +447,16 @@ static int server_send_ack(sd_dhcp_server *server, DHCPRequest *req, be32_t addr
if (r < 0)
return r;
r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
DHCP_OPTION_SUBNET_MASK, 4, &server->netmask);
if (r < 0)
return r;
r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
DHCP_OPTION_ROUTER, 4, &server->address);
if (r < 0)
return r;
r = dhcp_server_send_packet(server, req, packet, DHCP_ACK, offset);
if (r < 0)
return r;

9
src/libsystemd-network/test-dhcp-server.c
View File

@ -56,9 +56,10 @@ static int test_basic(sd_event *event) {
assert_se(!sd_dhcp_server_unref(server));
assert_se(sd_dhcp_server_start(server) == -EUNATCH);
assert_se(sd_dhcp_server_set_address(server, &address_any) == -EINVAL);
assert_se(sd_dhcp_server_set_address(server, &address_lo) >= 0);
assert_se(sd_dhcp_server_set_address(server, &address_lo) == -EBUSY);
assert_se(sd_dhcp_server_set_address(server, &address_any, 28) == -EINVAL);
assert_se(sd_dhcp_server_set_address(server, &address_any, 38) == -ERANGE);
assert_se(sd_dhcp_server_set_address(server, &address_lo, 8) >= 0);
assert_se(sd_dhcp_server_set_address(server, &address_lo, 8) == -EBUSY);
assert_se(sd_dhcp_server_set_lease_pool(server, &address_any, 1) == -EINVAL);
assert_se(sd_dhcp_server_set_lease_pool(server, &address_lo, 0) == -EINVAL);
@ -120,7 +121,7 @@ static void test_message_handler(void) {
};
assert_se(sd_dhcp_server_new(&server, 1) >= 0);
assert_se(sd_dhcp_server_set_address(server, &address_lo) >= 0);
assert_se(sd_dhcp_server_set_address(server, &address_lo, 8) >= 0);
assert_se(sd_dhcp_server_attach_event(server, NULL, 0) >= 0);
assert_se(sd_dhcp_server_start(server) >= 0);

2
src/network/networkd-link.c
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@ -311,7 +311,7 @@ static int link_enter_configured(Link *link) {
log_debug_link(link, "offering DHCPv4 leases");
r = sd_dhcp_server_set_address(link->dhcp_server, &address->in_addr.in);
r = sd_dhcp_server_set_address(link->dhcp_server, &address->in_addr.in, address->prefixlen);
if (r < 0)
return r;

2
src/systemd/sd-dhcp-server.h
View File

@ -44,7 +44,7 @@ bool sd_dhcp_server_is_running(sd_dhcp_server *server);
int sd_dhcp_server_start(sd_dhcp_server *server);
int sd_dhcp_server_stop(sd_dhcp_server *server);
int sd_dhcp_server_set_address(sd_dhcp_server *server, struct in_addr *address);
int sd_dhcp_server_set_address(sd_dhcp_server *server, struct in_addr *address, unsigned char prefixlen);
int sd_dhcp_server_set_lease_pool(sd_dhcp_server *server, struct in_addr *start, size_t size);
int sd_dhcp_server_forcerenew(sd_dhcp_server *server);