summaryrefslogtreecommitdiff
path: root/src/libsystemd-network/sd-dhcp-client.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libsystemd-network/sd-dhcp-client.c')
-rw-r--r--src/libsystemd-network/sd-dhcp-client.c57
1 files changed, 27 insertions, 30 deletions
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 94235cf2f5..cee4ccf784 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -257,19 +257,18 @@ static sd_dhcp_client *client_stop(sd_dhcp_client *client, int error) {
}
static int client_message_init(sd_dhcp_client *client, DHCPMessage *message,
- uint8_t type, uint8_t **opt, size_t *optlen) {
+ uint8_t type, size_t optlen, size_t *optoffset) {
be16_t max_size;
int r;
assert(client);
assert(client->secs);
assert(message);
- assert(opt);
- assert(optlen);
+ assert(optoffset);
assert(type == DHCP_DISCOVER || type == DHCP_REQUEST);
- r = dhcp_message_init(message, BOOTREQUEST, client->xid, type, opt,
- optlen);
+ r = dhcp_message_init(message, BOOTREQUEST, client->xid, type,
+ message->options, optlen, optoffset);
if (r < 0)
return r;
@@ -285,7 +284,8 @@ static int client_message_init(sd_dhcp_client *client, DHCPMessage *message,
/* Some DHCP servers will refuse to issue an DHCP lease if the Client
Identifier option is not set */
- r = dhcp_option_append(opt, optlen, DHCP_OPTION_CLIENT_IDENTIFIER,
+ r = dhcp_option_append(message->options, optlen, optoffset,
+ DHCP_OPTION_CLIENT_IDENTIFIER,
sizeof(client->client_id), &client->client_id);
if (r < 0)
return r;
@@ -299,10 +299,9 @@ static int client_message_init(sd_dhcp_client *client, DHCPMessage *message,
it MUST include that list in any subsequent DHCPREQUEST
messages.
*/
- r = dhcp_option_append(opt, optlen,
+ r = dhcp_option_append(message->options, optlen, optoffset,
DHCP_OPTION_PARAMETER_REQUEST_LIST,
- client->req_opts_size,
- client->req_opts);
+ client->req_opts_size, client->req_opts);
if (r < 0)
return r;
@@ -316,7 +315,7 @@ static int client_message_init(sd_dhcp_client *client, DHCPMessage *message,
*/
max_size = htobe16(DHCP_IP_UDP_SIZE + DHCP_MESSAGE_SIZE +
DHCP_MIN_OPTIONS_SIZE);
- r = dhcp_option_append(opt, optlen,
+ r = dhcp_option_append(message->options, optlen, optoffset,
DHCP_OPTION_MAXIMUM_MESSAGE_SIZE,
2, &max_size);
if (r < 0)
@@ -336,8 +335,7 @@ static int dhcp_client_send_raw(sd_dhcp_client *client, DHCPPacket *packet,
static int client_send_discover(sd_dhcp_client *client) {
_cleanup_free_ DHCPPacket *discover = NULL;
- size_t optlen, len;
- uint8_t *opt;
+ size_t optoffset, optlen, len;
usec_t time_now;
int r;
@@ -364,7 +362,7 @@ static int client_send_discover(sd_dhcp_client *client) {
return -ENOMEM;
r = client_message_init(client, &discover->dhcp, DHCP_DISCOVER,
- &opt, &optlen);
+ optlen, &optoffset);
if (r < 0)
return r;
@@ -375,22 +373,21 @@ static int client_send_discover(sd_dhcp_client *client) {
option to suggest the lease time it would like.
*/
if (client->last_addr != INADDR_ANY) {
- r = dhcp_option_append(&opt, &optlen,
- DHCP_OPTION_REQUESTED_IP_ADDRESS,
- 4, &client->last_addr);
+ r = dhcp_option_append(discover->dhcp.options, optlen, &optoffset,
+ DHCP_OPTION_REQUESTED_IP_ADDRESS,
+ 4, &client->last_addr);
if (r < 0)
return r;
}
- r = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
- if (r < 0)
- return r;
+ r = dhcp_option_append(discover->dhcp.options, optlen, &optoffset,
+ DHCP_OPTION_END, 0, NULL);
/* We currently ignore:
The client SHOULD wait a random time between one and ten seconds to
desynchronize the use of DHCP at startup.
*/
- r = dhcp_client_send_raw(client, discover, len - optlen);
+ r = dhcp_client_send_raw(client, discover, sizeof(DHCPPacket) + optoffset);
if (r < 0)
return r;
@@ -401,8 +398,7 @@ static int client_send_discover(sd_dhcp_client *client) {
static int client_send_request(sd_dhcp_client *client) {
_cleanup_free_ DHCPPacket *request;
- size_t optlen, len;
- uint8_t *opt;
+ size_t optoffset, optlen, len;
int r;
optlen = DHCP_MIN_OPTIONS_SIZE;
@@ -412,8 +408,8 @@ static int client_send_request(sd_dhcp_client *client) {
if (!request)
return -ENOMEM;
- r = client_message_init(client, &request->dhcp, DHCP_REQUEST, &opt,
- &optlen);
+ r = client_message_init(client, &request->dhcp, DHCP_REQUEST,
+ optlen, &optoffset);
if (r < 0)
return r;
@@ -428,13 +424,13 @@ static int client_send_request(sd_dhcp_client *client) {
filled in with the yiaddr value from the chosen DHCPOFFER.
*/
- r = dhcp_option_append(&opt, &optlen,
+ r = dhcp_option_append(request->dhcp.options, optlen, &optoffset,
DHCP_OPTION_SERVER_IDENTIFIER,
4, &client->lease->server_address);
if (r < 0)
return r;
- r = dhcp_option_append(&opt, &optlen,
+ r = dhcp_option_append(request->dhcp.options, optlen, &optoffset,
DHCP_OPTION_REQUESTED_IP_ADDRESS,
4, &client->lease->address);
if (r < 0)
@@ -447,7 +443,7 @@ static int client_send_request(sd_dhcp_client *client) {
option MUST be filled in with client’s notion of its previously
assigned address. ’ciaddr’ MUST be zero.
*/
- r = dhcp_option_append(&opt, &optlen,
+ r = dhcp_option_append(request->dhcp.options, optlen, &optoffset,
DHCP_OPTION_REQUESTED_IP_ADDRESS,
4, &client->last_addr);
if (r < 0)
@@ -480,7 +476,8 @@ static int client_send_request(sd_dhcp_client *client) {
return -EINVAL;
}
- r = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
+ r = dhcp_option_append(request->dhcp.options, optlen, &optoffset,
+ DHCP_OPTION_END, 0, NULL);
if (r < 0)
return r;
@@ -489,9 +486,9 @@ static int client_send_request(sd_dhcp_client *client) {
client->lease->server_address,
DHCP_PORT_SERVER,
&request->dhcp,
- len - optlen - DHCP_IP_UDP_SIZE);
+ sizeof(DHCPMessage) + optoffset);
} else {
- r = dhcp_client_send_raw(client, request, len - optlen);
+ r = dhcp_client_send_raw(client, request, sizeof(DHCPPacket) + optoffset);
}
if (r < 0)
return r;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-03 22:50:48 +0000