173 lines
6.8 KiB
C
173 lines
6.8 KiB
C
#include "ac.h"
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#include "capwap_dfa.h"
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#include "capwap_array.h"
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#include "ac_session.h"
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/* */
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int ac_dfa_state_join(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
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int i;
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struct capwap_header_data capwapheader;
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struct capwap_packet_txmng* txmngpacket;
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int status = AC_DFA_ACCEPT_PACKET;
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struct capwap_resultcode_element resultcode = { .code = CAPWAP_RESULTCODE_FAILURE };
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ASSERT(session != NULL);
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if (packet) {
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unsigned short binding;
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/* Check binding */
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binding = GET_WBID_HEADER(packet->rxmngpacket->header);
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if (ac_valid_binding(binding)) {
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if (packet->rxmngpacket->ctrlmsg.type == CAPWAP_JOIN_REQUEST) {
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resultcode.code = CAPWAP_RESULTCODE_SUCCESS;
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/* Get sessionid */
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memcpy(&session->sessionid, capwap_get_message_element_data(packet, CAPWAP_ELEMENT_SESSIONID), sizeof(struct capwap_sessionid_element));
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/* Get binding */
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session->binding = binding;
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} else {
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resultcode.code = CAPWAP_RESULTCODE_MSG_UNEXPECTED_INVALID_CURRENT_STATE;
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}
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} else {
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resultcode.code = CAPWAP_RESULTCODE_JOIN_FAILURE_BINDING_NOT_SUPPORTED;
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}
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/* Create response */
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capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, binding);
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txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_JOIN_RESPONSE, packet->rxmngpacket->ctrlmsg.seq, session->mtu);
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/* Add message element */
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_RESULTCODE, &resultcode);
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/* Check is valid packet after parsing request */
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if ((resultcode.code == CAPWAP_RESULTCODE_SUCCESS) || (resultcode.code == CAPWAP_RESULTCODE_SUCCESS_NAT_DETECTED)) {
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struct capwap_list* controllist;
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struct capwap_list_item* item;
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/* Update statistics */
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ac_update_statistics();
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_ACDESCRIPTION, &g_ac.descriptor);
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_ACNAME, &g_ac.acname);
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if (binding == CAPWAP_WIRELESS_BINDING_IEEE80211) {
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struct capwap_array* wtpradioinformation = (struct capwap_array*)capwap_get_message_element_data(packet, CAPWAP_ELEMENT_80211_WTPRADIOINFORMATION);
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for (i = 0; i < wtpradioinformation->count; i++) {
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struct capwap_80211_wtpradioinformation_element* radio;
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radio = *(struct capwap_80211_wtpradioinformation_element**)capwap_array_get_item_pointer(wtpradioinformation, i);
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_80211_WTPRADIOINFORMATION, radio);
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}
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}
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_ECNSUPPORT, &session->dfa.ecn);
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/* Get information from any local address */
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controllist = capwap_list_create();
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ac_get_control_information(controllist);
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for (item = controllist->first; item != NULL; item = item->next) {
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struct ac_session_control* sessioncontrol = (struct ac_session_control*)item->item;
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if (sessioncontrol->localaddress.ss_family == AF_INET) {
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struct capwap_controlipv4_element element;
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memcpy(&element.address, &((struct sockaddr_in*)&sessioncontrol->localaddress)->sin_addr, sizeof(struct in_addr));
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element.wtpcount = sessioncontrol->count;
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_CONTROLIPV4, &element);
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} else if (sessioncontrol->localaddress.ss_family == AF_INET6) {
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struct capwap_controlipv6_element element;
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memcpy(&element.address, &((struct sockaddr_in6*)&sessioncontrol->localaddress)->sin6_addr, sizeof(struct in6_addr));
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element.wtpcount = sessioncontrol->count;
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_CONTROLIPV6, &element);
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}
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}
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capwap_list_free(controllist);
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if (session->acctrladdress.ss_family == AF_INET) {
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struct capwap_localipv4_element addr;
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memcpy(&addr.address, &((struct sockaddr_in*)&session->acctrladdress)->sin_addr, sizeof(struct in_addr));
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_LOCALIPV4, &addr);
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} else if (session->acctrladdress.ss_family == AF_INET6) {
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struct capwap_localipv6_element addr;
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memcpy(&addr.address, &((struct sockaddr_in6*)&session->acctrladdress)->sin6_addr, sizeof(struct in6_addr));
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_LOCALIPV6, &addr);
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}
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/* CAPWAP_CREATE_ACIPV4LIST_ELEMENT */ /* TODO */
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/* CAPWAP_CREATE_ACIPV6LIST_ELEMENT */ /* TODO */
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capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_TRANSPORT, &session->dfa.transport);
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/* CAPWAP_CREATE_IMAGEIDENTIFIER_ELEMENT */ /* TODO */
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/* CAPWAP_CREATE_MAXIMUMMESSAGELENGTH_ELEMENT */ /* TODO */
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/* CAPWAP_CREATE_VENDORSPECIFICPAYLOAD_ELEMENT */ /* TODO */
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}
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/* Join response complete, get fragment packets */
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ac_free_reference_last_response(session);
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capwap_packet_txmng_get_fragment_packets(txmngpacket, session->responsefragmentpacket, session->fragmentid);
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if (session->responsefragmentpacket->count > 1) {
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session->fragmentid++;
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}
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/* Free packets manager */
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capwap_packet_txmng_free(txmngpacket);
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/* Save remote sequence number */
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session->remoteseqnumber = packet->rxmngpacket->ctrlmsg.seq;
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capwap_get_packet_digest(packet->rxmngpacket, packet->connection, session->lastrecvpackethash);
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/* Send Join response to WTP */
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if (capwap_crypt_sendto_fragmentpacket(&session->ctrldtls, session->ctrlsocket.socket[session->ctrlsocket.type], session->responsefragmentpacket, &session->acctrladdress, &session->wtpctrladdress)) {
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ac_dfa_change_state(session, CAPWAP_POSTJOIN_STATE);
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} else {
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/* Error to send packets */
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capwap_logging_debug("Warning: error to send join response packet");
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ac_dfa_change_state(session, CAPWAP_JOIN_TO_DTLS_TEARDOWN_STATE);
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status = AC_DFA_NO_PACKET;
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}
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} else {
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/* Join timeout */
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ac_dfa_change_state(session, CAPWAP_JOIN_TO_DTLS_TEARDOWN_STATE);
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status = AC_DFA_NO_PACKET;
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}
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return status;
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}
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/* */
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int ac_dfa_state_postjoin(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
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int status = AC_DFA_ACCEPT_PACKET;
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ASSERT(session != NULL);
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if (packet) {
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if (packet->rxmngpacket->ctrlmsg.type == CAPWAP_CONFIGURATION_STATUS_REQUEST) {
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ac_dfa_change_state(session, CAPWAP_CONFIGURE_STATE);
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status = ac_dfa_state_configure(session, packet);
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} else if (packet->rxmngpacket->ctrlmsg.type == CAPWAP_IMAGE_DATA_REQUEST) {
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ac_dfa_change_state(session, CAPWAP_IMAGE_DATA_STATE);
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status = ac_dfa_state_imagedata(session, packet);
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} else {
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ac_dfa_change_state(session, CAPWAP_JOIN_TO_DTLS_TEARDOWN_STATE);
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status = AC_DFA_NO_PACKET;
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}
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} else {
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/* Join timeout */
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ac_dfa_change_state(session, CAPWAP_JOIN_TO_DTLS_TEARDOWN_STATE);
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status = AC_DFA_NO_PACKET;
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}
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return status;
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}
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/* */
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int ac_dfa_state_join_to_dtlsteardown(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
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return ac_session_teardown_connection(session);
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}
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