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Diffstat (limited to 'networking/udhcp/dhcpc.c')
-rw-r--r--networking/udhcp/dhcpc.c56
1 files changed, 34 insertions, 22 deletions
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index ea06405..a06eeaa 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -612,9 +612,7 @@ static void init_packet(struct dhcp_packet *packet, char type)
secs = client_data.last_secs - client_data.first_secs;
packet->secs = (secs < 0xffff) ? htons(secs) : 0xffff;
- memcpy(packet->chaddr, client_data.client_mac, 6);
- if (client_data.clientid)
- udhcp_add_binary_option(packet, client_data.clientid);
+ memcpy(packet->chaddr, client_data_client_mac, 6);
}
static void add_client_options(struct dhcp_packet *packet)
@@ -715,7 +713,7 @@ static NOINLINE int send_discover(uint32_t xid, uint32_t requested)
/* Fill in: op, htype, hlen, cookie, chaddr fields,
* random xid field (we override it below),
- * client-id option (unless -C), message type option:
+ * message type option:
*/
init_packet(&packet, DHCPDISCOVER);
@@ -724,7 +722,7 @@ static NOINLINE int send_discover(uint32_t xid, uint32_t requested)
udhcp_add_simple_option(&packet, DHCP_REQUESTED_IP, requested);
/* Add options: maxsize,
- * optionally: hostname, fqdn, vendorclass,
+ * optionally: hostname, fqdn, vendorclass, client-id,
* "param req" option according to -O, options specified with -x
*/
add_client_options(&packet);
@@ -758,7 +756,7 @@ static NOINLINE int send_select(uint32_t xid, uint32_t server, uint32_t requeste
*/
/* Fill in: op, htype, hlen, cookie, chaddr fields,
* random xid field (we override it below),
- * client-id option (unless -C), message type option:
+ * message type option:
*/
init_packet(&packet, DHCPREQUEST);
@@ -768,7 +766,7 @@ static NOINLINE int send_select(uint32_t xid, uint32_t server, uint32_t requeste
udhcp_add_simple_option(&packet, DHCP_SERVER_ID, server);
/* Add options: maxsize,
- * optionally: hostname, fqdn, vendorclass,
+ * optionally: hostname, fqdn, vendorclass, client-id,
* "param req" option according to -O, and options specified with -x
*/
add_client_options(&packet);
@@ -805,7 +803,7 @@ static NOINLINE int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr)
*/
/* Fill in: op, htype, hlen, cookie, chaddr fields,
* random xid field (we override it below),
- * client-id option (unless -C), message type option:
+ * message type option:
*/
init_packet(&packet, DHCPREQUEST);
@@ -813,7 +811,7 @@ static NOINLINE int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr)
packet.ciaddr = ciaddr;
/* Add options: maxsize,
- * optionally: hostname, fqdn, vendorclass,
+ * optionally: hostname, fqdn, vendorclass, client-id,
* "param req" option according to -O, and options specified with -x
*/
add_client_options(&packet);
@@ -837,7 +835,7 @@ static NOINLINE int send_decline(/*uint32_t xid,*/ uint32_t server, uint32_t req
struct dhcp_packet packet;
/* Fill in: op, htype, hlen, cookie, chaddr, random xid fields,
- * client-id option (unless -C), message type option:
+ * message type option:
*/
init_packet(&packet, DHCPDECLINE);
@@ -854,6 +852,8 @@ static NOINLINE int send_decline(/*uint32_t xid,*/ uint32_t server, uint32_t req
udhcp_add_simple_option(&packet, DHCP_SERVER_ID, server);
+//TODO: add client-id opt?
+
bb_simple_info_msg("broadcasting decline");
return raw_bcast_from_client_data_ifindex(&packet, INADDR_ANY);
}
@@ -865,9 +865,10 @@ ALWAYS_INLINE /* one caller, help compiler to use this fact */
int send_release(uint32_t server, uint32_t ciaddr)
{
struct dhcp_packet packet;
+ struct option_set *ci;
/* Fill in: op, htype, hlen, cookie, chaddr, random xid fields,
- * client-id option (unless -C), message type option:
+ * message type option:
*/
init_packet(&packet, DHCPRELEASE);
@@ -876,6 +877,14 @@ int send_release(uint32_t server, uint32_t ciaddr)
udhcp_add_simple_option(&packet, DHCP_SERVER_ID, server);
+ /* RFC 2131 section 3.1.6:
+ * If the client used a 'client identifier' when it obtained the lease,
+ * it MUST use the same 'client identifier' in the DHCPRELEASE message.
+ */
+ ci = udhcp_find_option(client_data.options, DHCP_CLIENT_ID);
+ if (ci)
+ udhcp_add_binary_option(&packet, ci->data);
+
bb_info_msg("sending %s", "release");
/* Note: normally we unicast here since "server" is not zero.
* However, there _are_ people who run "address-less" DHCP servers,
@@ -1230,7 +1239,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
const char *str_V, *str_h, *str_F, *str_r;
IF_FEATURE_UDHCPC_ARPING(const char *str_a = "2000";)
IF_FEATURE_UDHCP_PORT(char *str_P;)
- void *clientid_mac_ptr;
+ uint8_t *clientid_mac_ptr;
llist_t *list_O = NULL;
llist_t *list_x = NULL;
int tryagain_timeout = 20;
@@ -1339,7 +1348,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (udhcp_read_interface(client_data.interface,
&client_data.ifindex,
NULL,
- client_data.client_mac)
+ client_data_client_mac)
) {
return 1;
}
@@ -1347,10 +1356,11 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
clientid_mac_ptr = NULL;
if (!(opt & OPT_C) && !udhcp_find_option(client_data.options, DHCP_CLIENT_ID)) {
/* not suppressed and not set, set the default client ID */
- client_data.clientid = alloc_dhcp_option(DHCP_CLIENT_ID, "", 7);
- client_data.clientid[OPT_DATA] = 1; /* type: ethernet */
- clientid_mac_ptr = client_data.clientid + OPT_DATA+1;
- memcpy(clientid_mac_ptr, client_data.client_mac, 6);
+ client_data_client_mac[-1] = 1; /* type: ethernet */
+ clientid_mac_ptr = udhcp_insert_new_option(
+ &client_data.options, DHCP_CLIENT_ID,
+ client_data_client_mac - 1, 1 + 6, /*dhcp6:*/ 0);
+ clientid_mac_ptr += 3; /* skip option code, len, ethernet */
}
if (str_V[0] != '\0') {
// can drop -V, str_V, client_data.vendorclass,
@@ -1447,12 +1457,12 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (udhcp_read_interface(client_data.interface,
&client_data.ifindex,
NULL,
- client_data.client_mac)
+ client_data_client_mac)
) {
goto ret0; /* iface is gone? */
}
if (clientid_mac_ptr)
- memcpy(clientid_mac_ptr, client_data.client_mac, 6);
+ memcpy(clientid_mac_ptr, client_data_client_mac, 6);
switch (client_data.state) {
case INIT_SELECTING:
@@ -1569,7 +1579,9 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
continue;
/* case RELEASED: */
}
- /* yah, I know, *you* say it would never happen */
+ /* RELEASED state (when we got SIGUSR2) ends up here.
+ * (wait for SIGUSR1 to re-init, or for TERM, etc)
+ */
timeout = INT_MAX;
continue; /* back to main loop */
} /* if poll timed out */
@@ -1645,7 +1657,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
/* Ignore packets that aren't for us */
if (packet.hlen != 6
- || memcmp(packet.chaddr, client_data.client_mac, 6) != 0
+ || memcmp(packet.chaddr, client_data_client_mac, 6) != 0
) {
//FIXME: need to also check that last 10 bytes are zero
log1("chaddr does not match%s", ", ignoring packet"); // log2?
@@ -1757,7 +1769,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (!arpping(requested_ip,
NULL,
(uint32_t) 0,
- client_data.client_mac,
+ client_data_client_mac,
client_data.interface,
arpping_ms)
) {
generated by cgit v1.1 at 2024-12-26 06:46:33 +0000