diff options
Diffstat (limited to 'src/libsystemd-network')
| -rw-r--r-- | src/libsystemd-network/dhcp-internal.h | 4 | ||||
| -rw-r--r-- | src/libsystemd-network/dhcp-packet.c | 12 | ||||
| -rw-r--r-- | src/libsystemd-network/sd-dhcp-client.c | 27 |
3 files changed, 27 insertions, 16 deletions
diff --git a/src/libsystemd-network/dhcp-internal.h b/src/libsystemd-network/dhcp-internal.h index ce83b81631..3c3e1f649f 100644 --- a/src/libsystemd-network/dhcp-internal.h +++ b/src/libsystemd-network/dhcp-internal.h @@ -48,7 +48,9 @@ int dhcp_option_parse(DHCPMessage *message, size_t len, int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid, uint8_t type, uint8_t **opt, size_t *optlen); -void dhcp_packet_append_ip_headers(DHCPPacket *packet, uint16_t len); +void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr, + uint16_t source, be32_t destination_addr, + uint16_t destination, uint16_t len); int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len, bool checksum); diff --git a/src/libsystemd-network/dhcp-packet.c b/src/libsystemd-network/dhcp-packet.c index 95c4277f8c..418a9773f2 100644 --- a/src/libsystemd-network/dhcp-packet.c +++ b/src/libsystemd-network/dhcp-packet.c @@ -92,17 +92,19 @@ static uint16_t dhcp_checksum(void *buf, int len) { return ~sum; } -void dhcp_packet_append_ip_headers(DHCPPacket *packet, uint16_t len) { +void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr, + uint16_t source_port, be32_t destination_addr, + uint16_t destination_port, uint16_t len) { packet->ip.version = IPVERSION; packet->ip.ihl = DHCP_IP_SIZE / 4; packet->ip.tot_len = htobe16(len); packet->ip.protocol = IPPROTO_UDP; - packet->ip.saddr = INADDR_ANY; - packet->ip.daddr = INADDR_BROADCAST; + packet->ip.saddr = source_addr; + packet->ip.daddr = destination_addr; - packet->udp.source = htobe16(DHCP_PORT_CLIENT); - packet->udp.dest = htobe16(DHCP_PORT_SERVER); + packet->udp.source = htobe16(source_port); + packet->udp.dest = htobe16(destination_port); packet->udp.len = htobe16(len - DHCP_IP_SIZE); diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c index 07b27d5393..e0fce5b5ad 100644 --- a/src/libsystemd-network/sd-dhcp-client.c +++ b/src/libsystemd-network/sd-dhcp-client.c @@ -264,6 +264,15 @@ static int client_message_init(sd_dhcp_client *client, DHCPMessage *message, return 0; } +static int dhcp_client_send_raw(sd_dhcp_client *client, DHCPPacket *packet, + size_t len) { + dhcp_packet_append_ip_headers(packet, INADDR_ANY, DHCP_PORT_CLIENT, + INADDR_BROADCAST, DHCP_PORT_SERVER, len); + + return dhcp_network_send_raw_socket(client->fd, &client->link, + packet, len); +} + static int client_send_discover(sd_dhcp_client *client, uint16_t secs) { int err = 0; _cleanup_free_ DHCPPacket *discover; @@ -295,14 +304,13 @@ static int client_send_discover(sd_dhcp_client *client, uint16_t secs) { if (err < 0) return err; - dhcp_packet_append_ip_headers(discover, len); - - err = dhcp_network_send_raw_socket(client->fd, &client->link, - discover, len); + err = dhcp_client_send_raw(client, discover, len); + if (err < 0) + return err; log_dhcp_client(client, "DISCOVER"); - return err; + return 0; } static int client_send_request(sd_dhcp_client *client, uint16_t secs) { @@ -348,15 +356,14 @@ static int client_send_request(sd_dhcp_client *client, uint16_t secs) { &request->dhcp, len - DHCP_IP_UDP_SIZE); } else { - dhcp_packet_append_ip_headers(request, len); - - err = dhcp_network_send_raw_socket(client->fd, &client->link, - request, len); + err = dhcp_client_send_raw(client, request, len); } + if (err < 0) + return err; log_dhcp_client(client, "REQUEST"); - return err; + return 0; } static uint16_t client_update_secs(sd_dhcp_client *client, usec_t time_now) |