shaba/systemd
1
0
Fork 0
mirror of https://github.com/systemd/systemd.git synced 2025-01-10 05:18:17 +03:00
Code

sd-dhcp-server: add support to send next server and filename option for PXE boot systems

Browse Source
This commit is contained in:
Yu Watanabe 2022-02-25 02:32:58 +09:00
parent c00e68c7bd
commit d5e5cd5c34
4 changed files with 47 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/libsystemd-network/dhcp-server-internal.h
View File

@ -65,6 +65,8 @@ struct sd_dhcp_server {
char *timezone;
DHCPServerData servers[_SD_DHCP_LEASE_SERVER_TYPE_MAX];
struct in_addr next_server;
char *filename;
OrderedSet *extra_options;
OrderedSet *vendor_options;

39
src/libsystemd-network/sd-dhcp-server.c
View File

@ -21,6 +21,7 @@
#include "siphash24.h"
#include "string-util.h"
#include "unaligned.h"
#include "utf8.h"
#define DHCP_DEFAULT_LEASE_TIME_USEC USEC_PER_HOUR
#define DHCP_MAX_LEASE_TIME_USEC (USEC_PER_HOUR*12)
@ -162,6 +163,7 @@ static sd_dhcp_server *dhcp_server_free(sd_dhcp_server *server) {
sd_event_unref(server->event);
free(server->filename);
free(server->timezone);
for (sd_dhcp_lease_server_type_t i = 0; i < _SD_DHCP_LEASE_SERVER_TYPE_MAX; i++)
@ -270,6 +272,26 @@ sd_event *sd_dhcp_server_get_event(sd_dhcp_server *server) {
return server->event;
}
int sd_dhcp_server_set_next_server(sd_dhcp_server *server, const struct in_addr *next_server) {
assert_return(server, -EINVAL);
if (next_server)
server->next_server = *next_server;
else
server->next_server = (struct in_addr) {};
return 0;
}
int sd_dhcp_server_set_filename(sd_dhcp_server *server, const char *filename) {
assert_return(server, -EINVAL);
if (filename && !ascii_is_valid(filename))
return -EINVAL;
return free_and_strdup(&server->filename, filename);
}
int sd_dhcp_server_stop(sd_dhcp_server *server) {
bool running;
@ -539,6 +561,7 @@ static int server_send_offer_or_ack(
return r;
packet->dhcp.yiaddr = address;
packet->dhcp.siaddr = server->next_server.s_addr;
lease_time = htobe32(req->lifetime);
r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
@ -562,6 +585,22 @@ static int server_send_offer_or_ack(
return r;
}
if (server->filename) {
/* The pxelinux magic option is marked as deprecated, but let's append it for older
* implementations. */
r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
SD_DHCP_OPTION_PXELINUX_MAGIC, 4,
(const uint8_t[]) { 0xf1, 0x00, 0x74, 0x7e });
if (r < 0)
return r;
r = dhcp_option_append(&packet->dhcp, req->max_optlen, &offset, 0,
SD_DHCP_OPTION_CONFIGURATION_FILE,
strlen(server->filename), server->filename);
if (r < 0)
return r;
}
if (type == DHCP_ACK) {
static const uint8_t option_map[_SD_DHCP_LEASE_SERVER_TYPE_MAX] = {
[SD_DHCP_LEASE_DNS] = SD_DHCP_OPTION_DOMAIN_NAME_SERVER,

4
src/systemd/sd-dhcp-client.h
View File

@ -97,6 +97,10 @@ enum {
SD_DHCP_OPTION_SIP_SERVER = 120,
SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE = 121,
SD_DHCP_OPTION_MUD_URL = 161,
SD_DHCP_OPTION_PXELINUX_MAGIC = 208, /* deprecated */
SD_DHCP_OPTION_CONFIGURATION_FILE = 209,
SD_DHCP_OPTION_PATH_PREFIX = 210,
SD_DHCP_OPTION_REBOOT_TIME = 211,
SD_DHCP_OPTION_6RD = 212,
SD_DHCP_OPTION_PRIVATE_BASE = 224,
/* Windows 10 option to send when Anonymize=true */

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

@ -58,6 +58,8 @@ int sd_dhcp_server_stop(sd_dhcp_server *server);
int sd_dhcp_server_configure_pool(sd_dhcp_server *server, const struct in_addr *address, unsigned char prefixlen, uint32_t offset, uint32_t size);
int sd_dhcp_server_set_next_server(sd_dhcp_server *server, const struct in_addr *next_server);
int sd_dhcp_server_set_filename(sd_dhcp_server *server, const char *filename);
int sd_dhcp_server_set_bind_to_interface(sd_dhcp_server *server, int enabled);
int sd_dhcp_server_set_timezone(sd_dhcp_server *server, const char *timezone);
int sd_dhcp_server_set_router(sd_dhcp_server *server, const struct in_addr *address);