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[dhcp] Allow vendor class to be changed in DHCP requests

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Allow the DHCPv4 vendor class to be specified via the "vendor-class"
setting.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2017-03-20 13:58:59 +02:00
parent 7692a8ff02
commit de2c6fa240
3 changed files with 34 additions and 11 deletions
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34
src/net/udp/dhcp.c
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@@ -99,6 +99,12 @@ static uint8_t dhcp_request_options_data[] = {
DHCP_END
};
/** Settings copied in to all DHCP requests */
static const struct setting * dhcp_request_settings[] = {
&user_class_setting,
&vendor_class_setting,
};
/** DHCP server address setting */
const struct setting dhcp_server_setting __setting ( SETTING_MISC,
dhcp-server ) = {
@@ -975,11 +981,13 @@ int dhcp_create_request ( struct dhcp_packet *dhcppkt,
struct dhcp_netdev_desc dhcp_desc;
struct dhcp_client_id client_id;
struct dhcp_client_uuid client_uuid;
const struct setting *setting;
uint8_t *dhcp_features;
size_t dhcp_features_len;
size_t ll_addr_len;
void *user_class;
void *raw;
ssize_t len;
unsigned int i;
int rc;
/* Create DHCP packet */
@@ -1047,19 +1055,23 @@ int dhcp_create_request ( struct dhcp_packet *dhcppkt,
}
}
/* Add user class, if we have one. */
if ( ( len = fetch_raw_setting_copy ( NULL, &user_class_setting,
&user_class ) ) >= 0 ) {
if ( ( rc = dhcppkt_store ( dhcppkt, DHCP_USER_CLASS_ID,
user_class, len ) ) != 0 ) {
DBG ( "DHCP could not set user class: %s\n",
strerror ( rc ) );
goto err_store_user_class;
/* Add request settings, if applicable */
for ( i = 0 ; i < ( sizeof ( dhcp_request_settings ) /
sizeof ( dhcp_request_settings[0] ) ) ; i++ ) {
setting = dhcp_request_settings[i];
if ( ( len = fetch_raw_setting_copy ( NULL, setting,
&raw ) ) >= 0 ) {
rc = dhcppkt_store ( dhcppkt, setting->tag, raw, len );
free ( raw );
if ( rc != 0 ) {
DBG ( "DHCP could not set %s: %s\n",
setting->name, strerror ( rc ) );
goto err_store_raw;
}
}
}
err_store_user_class:
free ( user_class );
err_store_raw:
err_store_client_uuid:
err_store_client_id:
err_store_busid: