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Diffstat (limited to 'networking/udhcp/d6_dhcpc.c')
-rw-r--r--networking/udhcp/d6_dhcpc.c56
1 files changed, 28 insertions, 28 deletions
diff --git a/networking/udhcp/d6_dhcpc.c b/networking/udhcp/d6_dhcpc.c
index 7f288f8..802a275 100644
--- a/networking/udhcp/d6_dhcpc.c
+++ b/networking/udhcp/d6_dhcpc.c
@@ -479,15 +479,15 @@ static ALWAYS_INLINE uint32_t random_xid(void)
}
/* Initialize the packet with the proper defaults */
-static uint8_t *init_d6_packet(struct d6_packet *packet, char type, uint32_t xid)
+static uint8_t *init_d6_packet(struct d6_packet *packet, char type)
{
uint8_t *ptr;
unsigned secs;
memset(packet, 0, sizeof(*packet));
- packet->d6_xid32 = xid;
- packet->d6_msg_type = type;
+ packet->d6_xid32 = client_data.xid;
+ packet->d6_msg_type = type; /* union, overwrites lowest byte of d6_xid32 */
/* ELAPSED_TIME option is required to be present by the RFC,
* and some servers do check for its presense. [which?]
@@ -585,13 +585,13 @@ static int d6_mcast_from_client_data_ifindex(struct d6_packet *packet, uint8_t *
* about parameter values the client would like to have returned.
*/
/* NOINLINE: limit stack usage in caller */
-static NOINLINE int send_d6_info_request(uint32_t xid)
+static NOINLINE int send_d6_info_request(void)
{
struct d6_packet packet;
uint8_t *opt_ptr;
- /* Fill in: msg type */
- opt_ptr = init_d6_packet(&packet, D6_MSG_INFORMATION_REQUEST, xid);
+ /* Fill in: msg type, xid, ELAPSED_TIME */
+ opt_ptr = init_d6_packet(&packet, D6_MSG_INFORMATION_REQUEST);
/* Add options: client-id,
* "param req" option according to -O, options specified with -x
@@ -684,14 +684,14 @@ static NOINLINE int send_d6_info_request(uint32_t xid)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/* NOINLINE: limit stack usage in caller */
-static NOINLINE int send_d6_discover(uint32_t xid, struct in6_addr *requested_ipv6)
+static NOINLINE int send_d6_discover(struct in6_addr *requested_ipv6)
{
struct d6_packet packet;
uint8_t *opt_ptr;
unsigned len;
- /* Fill in: msg type */
- opt_ptr = init_d6_packet(&packet, D6_MSG_SOLICIT, xid);
+ /* Fill in: msg type, xid, ELAPSED_TIME */
+ opt_ptr = init_d6_packet(&packet, D6_MSG_SOLICIT);
/* Create new IA_NA, optionally with included IAADDR with requested IP */
free(client6_data.ia_na);
@@ -763,13 +763,13 @@ static NOINLINE int send_d6_discover(uint32_t xid, struct in6_addr *requested_ip
* messages from the server.
*/
/* NOINLINE: limit stack usage in caller */
-static NOINLINE int send_d6_select(uint32_t xid)
+static NOINLINE int send_d6_select(void)
{
struct d6_packet packet;
uint8_t *opt_ptr;
- /* Fill in: msg type */
- opt_ptr = init_d6_packet(&packet, D6_MSG_REQUEST, xid);
+ /* Fill in: msg type, xid, ELAPSED_TIME */
+ opt_ptr = init_d6_packet(&packet, D6_MSG_REQUEST);
/* server id */
opt_ptr = mempcpy(opt_ptr, client6_data.server_id, client6_data.server_id->len + 2+2);
@@ -836,13 +836,13 @@ static NOINLINE int send_d6_select(uint32_t xid)
* about parameter values the client would like to have returned.
*/
/* NOINLINE: limit stack usage in caller */
-static NOINLINE int send_d6_renew(uint32_t xid, struct in6_addr *server_ipv6, struct in6_addr *our_cur_ipv6)
+static NOINLINE int send_d6_renew(struct in6_addr *server_ipv6, struct in6_addr *our_cur_ipv6)
{
struct d6_packet packet;
uint8_t *opt_ptr;
- /* Fill in: msg type */
- opt_ptr = init_d6_packet(&packet, DHCPREQUEST, xid);
+ /* Fill in: msg type, xid, ELAPSED_TIME */
+ opt_ptr = init_d6_packet(&packet, DHCPREQUEST);
/* server id */
opt_ptr = mempcpy(opt_ptr, client6_data.server_id, client6_data.server_id->len + 2+2);
@@ -877,8 +877,8 @@ int send_d6_release(struct in6_addr *server_ipv6, struct in6_addr *our_cur_ipv6)
uint8_t *opt_ptr;
struct option_set *ci;
- /* Fill in: msg type, client id */
- opt_ptr = init_d6_packet(&packet, D6_MSG_RELEASE, random_xid());
+ /* Fill in: msg type, xid, ELAPSED_TIME */
+ opt_ptr = init_d6_packet(&packet, D6_MSG_RELEASE);
/* server id */
opt_ptr = mempcpy(opt_ptr, client6_data.server_id, client6_data.server_id->len + 2+2);
/* IA NA (contains our current IP) */
@@ -1097,6 +1097,7 @@ static void perform_d6_release(struct in6_addr *server_ipv6, struct in6_addr *ou
|| client_data.state == RENEW_REQUESTED
) {
bb_simple_info_msg("unicasting a release");
+ client_data.xid = random_xid(); //TODO: can omit?
send_d6_release(server_ipv6, our_cur_ipv6); /* unicast */
}
bb_simple_info_msg("entering released state");
@@ -1183,7 +1184,6 @@ int udhcpc6_main(int argc UNUSED_PARAM, char **argv)
struct in6_addr srv6_buf;
struct in6_addr ipv6_buf;
struct in6_addr *requested_ipv6;
- uint32_t xid = 0;
int packet_num;
int timeout; /* must be signed */
int lease_remaining; /* must be signed */
@@ -1387,13 +1387,13 @@ int udhcpc6_main(int argc UNUSED_PARAM, char **argv)
if (!discover_retries || packet_num < discover_retries) {
if (packet_num == 0) {
change_listen_mode(LISTEN_RAW);
- xid = random_xid();
+ client_data.xid = random_xid();
}
/* multicast */
if (opt & OPT_l)
- send_d6_info_request(xid);
+ send_d6_info_request();
else
- send_d6_discover(xid, requested_ipv6);
+ send_d6_discover(requested_ipv6);
timeout = discover_timeout;
packet_num++;
continue;
@@ -1427,7 +1427,7 @@ int udhcpc6_main(int argc UNUSED_PARAM, char **argv)
case REQUESTING:
if (!discover_retries || packet_num < discover_retries) {
/* send multicast select packet */
- send_d6_select(xid);
+ send_d6_select();
timeout = discover_timeout;
packet_num++;
continue;
@@ -1459,9 +1459,9 @@ int udhcpc6_main(int argc UNUSED_PARAM, char **argv)
* into INIT_SELECTING state.
*/
if (opt & OPT_l)
- send_d6_info_request(xid);
+ send_d6_info_request();
else
- send_d6_renew(xid, &srv6_buf, requested_ipv6);
+ send_d6_renew(&srv6_buf, requested_ipv6);
timeout = discover_timeout;
packet_num++;
continue;
@@ -1484,9 +1484,9 @@ int udhcpc6_main(int argc UNUSED_PARAM, char **argv)
* try to find DHCP server using broadcast */
if (lease_remaining > 0 && packet_num < 3) {
if (opt & OPT_l)
- send_d6_info_request(xid);
+ send_d6_info_request();
else /* send a broadcast renew request */
- send_d6_renew(xid, /*server_ipv6:*/ NULL, requested_ipv6);
+ send_d6_renew(/*server_ipv6:*/ NULL, requested_ipv6);
timeout = discover_timeout;
packet_num++;
continue;
@@ -1581,9 +1581,9 @@ int udhcpc6_main(int argc UNUSED_PARAM, char **argv)
packet_end = (uint8_t*)&packet + len;
}
- if ((packet.d6_xid32 & htonl(0x00ffffff)) != xid) {
+ if ((packet.d6_xid32 & htonl(0x00ffffff)) != client_data.xid) {
log1("xid %x (our is %x)%s",
- (unsigned)(packet.d6_xid32 & htonl(0x00ffffff)), (unsigned)xid,
+ (unsigned)(packet.d6_xid32 & htonl(0x00ffffff)), (unsigned)client_data.xid,
", ignoring packet"
);
continue;
generated by cgit v1.1 at 2024-11-06 10:19:04 +0000