264 lines
8.7 KiB
C
264 lines
8.7 KiB
C
#include "ac.h"
|
|
#include "capwap_dfa.h"
|
|
#include "capwap_array.h"
|
|
#include "ac_session.h"
|
|
|
|
/* */
|
|
static int receive_echo_request(struct ac_session_t* session, struct capwap_build_packet* buildpacket, struct capwap_packet* packet) {
|
|
unsigned long i;
|
|
unsigned short binding;
|
|
|
|
ASSERT(session != NULL);
|
|
ASSERT(buildpacket != NULL);
|
|
ASSERT(packet != NULL);
|
|
|
|
/* */
|
|
binding = GET_WBID_HEADER(&buildpacket->header);
|
|
if (ac_valid_binding(binding) && IS_SEQUENCE_SMALLER(session->remoteseqnumber, buildpacket->ctrlmsg.seq)) {
|
|
struct capwap_element_echo_request echorequest;
|
|
|
|
/* Echo request info*/
|
|
capwap_init_element_echo_request(&echorequest, binding);
|
|
|
|
/* Parsing elements list */
|
|
if (capwap_parsing_element_echo_request(&echorequest, buildpacket->elementslist->first)) {
|
|
struct capwap_build_packet* responsepacket;
|
|
|
|
/* Create response */
|
|
responsepacket = capwap_tx_packet_create(CAPWAP_RADIOID_NONE, binding);
|
|
responsepacket->isctrlmsg = 1;
|
|
|
|
/* Prepare echo response */
|
|
capwap_build_packet_set_control_message_type(responsepacket, CAPWAP_ECHO_RESPONSE, buildpacket->ctrlmsg.seq);
|
|
/* CAPWAP_CREATE_VENDORSPECIFICPAYLOAD_ELEMENT */ /* TODO */
|
|
|
|
if (!capwap_build_packet_validate(responsepacket, NULL)) {
|
|
int result;
|
|
|
|
/* Free old reference for this request */
|
|
ac_free_reference_last_response(session);
|
|
|
|
/* Send echo response to WTP */
|
|
result = capwap_fragment_build_packet(responsepacket, session->responsefragmentpacket, session->mtu, session->fragmentid);
|
|
if (result >= 0) {
|
|
if (result == 1) {
|
|
session->fragmentid++;
|
|
}
|
|
|
|
/* Save remote sequence number */
|
|
session->remoteseqnumber = buildpacket->ctrlmsg.seq;
|
|
capwap_get_packet_digest((void*)packet->header, packet->packetsize, session->lastrecvpackethash);
|
|
|
|
/* Send */
|
|
for (i = 0; i < session->responsefragmentpacket->count; i++) {
|
|
struct capwap_packet* txpacket = (struct capwap_packet*)capwap_array_get_item_pointer(session->responsefragmentpacket, i);
|
|
ASSERT(txpacket != NULL);
|
|
|
|
if (!capwap_crypt_sendto(&session->ctrldtls, session->ctrlsocket.socket[session->ctrlsocket.type], txpacket->header, txpacket->packetsize, &session->acctrladdress, &session->wtpctrladdress)) {
|
|
/* Response is already created and saved. When receive a re-request, DFA autoresponse */
|
|
capwap_logging_debug("Warning: error to send echo response packet");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Free memory */
|
|
capwap_build_packet_free(responsepacket);
|
|
}
|
|
|
|
/* Free */
|
|
capwap_free_element_echo_request(&echorequest, binding);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* */
|
|
int ac_dfa_state_run(struct ac_session_t* session, struct capwap_packet* packet) {
|
|
int status = AC_DFA_ACCEPT_PACKET;
|
|
|
|
ASSERT(session != NULL);
|
|
|
|
if (packet) {
|
|
struct capwap_build_packet* buildpacket;
|
|
|
|
buildpacket = capwap_rx_packet_create((void*)packet->header, packet->packetsize, packet->socket.isctrlsocket);
|
|
if (buildpacket) {
|
|
if (!capwap_build_packet_validate(buildpacket, NULL)) {
|
|
if (packet->socket.isctrlsocket) {
|
|
unsigned long typemsg = ntohl(buildpacket->ctrlmsg.type);
|
|
|
|
if (capwap_is_request_type(typemsg) || ((session->localseqnumber - 1) == buildpacket->ctrlmsg.seq)) {
|
|
switch (typemsg) {
|
|
case CAPWAP_CONFIGURATION_UPDATE_REQUEST: {
|
|
/* TODO */
|
|
capwap_set_timeout(AC_MAX_ECHO_INTERVAL, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
break;
|
|
}
|
|
|
|
case CAPWAP_CHANGE_STATE_EVENT_RESPONSE: {
|
|
/* TODO */
|
|
capwap_set_timeout(AC_MAX_ECHO_INTERVAL, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
break;
|
|
}
|
|
|
|
case CAPWAP_ECHO_REQUEST: {
|
|
if (!receive_echo_request(session, buildpacket, packet)) {
|
|
capwap_set_timeout(AC_MAX_ECHO_INTERVAL, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
} else {
|
|
ac_dfa_change_state(session, CAPWAP_RUN_TO_DTLS_TEARDOWN_STATE);
|
|
status = AC_DFA_NO_PACKET;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case CAPWAP_CLEAR_CONFIGURATION_REQUEST: {
|
|
/* TODO */
|
|
capwap_set_timeout(AC_MAX_ECHO_INTERVAL, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
break;
|
|
}
|
|
|
|
case CAPWAP_WTP_EVENT_RESPONSE: {
|
|
/* TODO */
|
|
capwap_set_timeout(AC_MAX_ECHO_INTERVAL, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
break;
|
|
}
|
|
|
|
case CAPWAP_DATA_TRANSFER_REQUEST: {
|
|
/* TODO */
|
|
capwap_set_timeout(AC_MAX_ECHO_INTERVAL, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
break;
|
|
}
|
|
|
|
case CAPWAP_DATA_TRANSFER_RESPONSE: {
|
|
/* TODO */
|
|
capwap_set_timeout(AC_MAX_ECHO_INTERVAL, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (IS_FLAG_K_HEADER(&buildpacket->header)) {
|
|
struct capwap_sessionid_element sessionid;
|
|
|
|
if (capwap_get_sessionid_from_keepalive(buildpacket, &sessionid)) {
|
|
if (!memcmp(&sessionid, &session->sessionid, sizeof(struct capwap_sessionid_element))) {
|
|
int result;
|
|
capwap_fragment_packet_array* txfragpacket;
|
|
|
|
/* Receive data packet keepalive, response with same packet */
|
|
txfragpacket = capwap_array_create(sizeof(struct capwap_packet), 0);
|
|
result = capwap_fragment_build_packet(buildpacket, txfragpacket, CAPWAP_DONT_FRAGMENT, 0);
|
|
if (!result) {
|
|
struct capwap_packet* txpacket;
|
|
|
|
ASSERT(txfragpacket->count == 1);
|
|
|
|
txpacket = (struct capwap_packet*)capwap_array_get_item_pointer(txfragpacket, 0);
|
|
ASSERT(txpacket != NULL);
|
|
|
|
if (!capwap_crypt_sendto(&session->datadtls, session->datasocket.socket[session->datasocket.type], txpacket->header, txpacket->packetsize, &session->acdataaddress, &session->wtpdataaddress)) {
|
|
capwap_logging_debug("Warning: error to send data channel keepalive packet");
|
|
result = -1;
|
|
}
|
|
}
|
|
|
|
/* */
|
|
capwap_fragment_free(txfragpacket);
|
|
capwap_array_free(txfragpacket);
|
|
|
|
if (result) {
|
|
ac_dfa_change_state(session, CAPWAP_RUN_TO_DTLS_TEARDOWN_STATE);
|
|
status = AC_DFA_NO_PACKET;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* TODO */
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Free */
|
|
capwap_build_packet_free(buildpacket);
|
|
}
|
|
} else {
|
|
ac_dfa_change_state(session, CAPWAP_RUN_TO_DTLS_TEARDOWN_STATE);
|
|
status = AC_DFA_NO_PACKET;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/* */
|
|
int ac_dfa_state_run_to_reset(struct ac_session_t* session, struct capwap_packet* packet) {
|
|
int status = AC_DFA_NO_PACKET;
|
|
struct capwap_build_packet* buildpacket;
|
|
|
|
ASSERT(session != NULL);
|
|
ASSERT(packet == NULL);
|
|
|
|
/* Build packet */
|
|
buildpacket = capwap_tx_packet_create(CAPWAP_RADIOID_NONE, session->binding);
|
|
buildpacket->isctrlmsg = 1;
|
|
|
|
/* Prepare reset request */
|
|
capwap_build_packet_set_control_message_type(buildpacket, CAPWAP_RESET_REQUEST, session->localseqnumber++);
|
|
capwap_build_packet_add_message_element(buildpacket, CAPWAP_CREATE_IMAGEIDENTIFIER_ELEMENT(&session->startupimage));
|
|
/* CAPWAP_CREATE_VENDORSPECIFICPAYLOAD_ELEMENT */ /* TODO */
|
|
|
|
if (!capwap_build_packet_validate(buildpacket, NULL)) {
|
|
int i;
|
|
int result;
|
|
|
|
/* Free old reference for this request */
|
|
ac_free_reference_last_request(session);
|
|
|
|
/* Send reset request to WTP */
|
|
result = capwap_fragment_build_packet(buildpacket, session->requestfragmentpacket, session->mtu, session->fragmentid);
|
|
if (result >= 0) {
|
|
if (result == 1) {
|
|
session->fragmentid++;
|
|
}
|
|
|
|
/* Send */
|
|
for (i = 0; i < session->requestfragmentpacket->count; i++) {
|
|
struct capwap_packet* txpacket = (struct capwap_packet*)capwap_array_get_item_pointer(session->requestfragmentpacket, i);
|
|
ASSERT(txpacket != NULL);
|
|
|
|
if (!capwap_crypt_sendto(&session->ctrldtls, session->ctrlsocket.socket[session->ctrlsocket.type], txpacket->header, txpacket->packetsize, &session->acctrladdress, &session->wtpctrladdress)) {
|
|
capwap_logging_debug("Warning: error to send reset request packet");
|
|
result = -1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (result == -1) {
|
|
/* Error to send packets */
|
|
ac_free_reference_last_request(session);
|
|
ac_dfa_change_state(session, CAPWAP_RESET_TO_DTLS_TEARDOWN_STATE);
|
|
} else {
|
|
session->dfa.rfcRetransmitCount = 0;
|
|
|
|
capwap_killall_timeout(&session->timeout);
|
|
capwap_set_timeout(session->dfa.rfcRetransmitInterval, &session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
|
|
|
|
ac_dfa_change_state(session, CAPWAP_RESET_STATE);
|
|
status = AC_DFA_ACCEPT_PACKET;
|
|
}
|
|
}
|
|
|
|
/* Free memory */
|
|
capwap_build_packet_free(buildpacket);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* */
|
|
int ac_dfa_state_run_to_dtlsteardown(struct ac_session_t* session, struct capwap_packet* packet) {
|
|
return ac_session_teardown_connection(session);
|
|
}
|