a6d0efe91a
Switch to a connected UDP kernel socket. Comparing the local and remote IPs is no longer required and handling different IP versions and UDP types is automatic. The WTP logic needs to reopen the socket on demand now.
113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
#include "wtp.h"
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#include "capwap_dfa.h"
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#include "wtp_dfa.h"
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/* */
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static void wtp_dfa_state_dtlsconnect_timeout(struct capwap_timeout* timeout, unsigned long index, void* context, void* param) {
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wtp_teardown_connection();
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}
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/* */
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void wtp_start_dtlssetup(void) {
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/* Create DTLS session */
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if (!capwap_crypt_createsession(&g_wtp.dtls, &g_wtp.dtlscontext)) {
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wtp_dfa_change_state(CAPWAP_SULKING_STATE);
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capwap_timeout_set(g_wtp.timeout, g_wtp.idtimercontrol, WTP_SILENT_INTERVAL, wtp_dfa_state_sulking_timeout, NULL, NULL);
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} else {
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if (capwap_crypt_open(&g_wtp.dtls) == CAPWAP_HANDSHAKE_ERROR) {
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wtp_dfa_change_state(CAPWAP_SULKING_STATE);
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capwap_timeout_set(g_wtp.timeout, g_wtp.idtimercontrol, WTP_SILENT_INTERVAL, wtp_dfa_state_sulking_timeout, NULL, NULL);
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} else {
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wtp_dfa_change_state(CAPWAP_DTLS_CONNECT_STATE);
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capwap_timeout_set(g_wtp.timeout, g_wtp.idtimercontrol, WTP_DTLS_INTERVAL, wtp_dfa_state_dtlsconnect_timeout, NULL, NULL);
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}
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}
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}
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/* */
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void wtp_start_datachannel(void) {
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union sockaddr_capwap dataaddr;
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/* Set AC data address */
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memcpy(&dataaddr, &g_wtp.dtls.peeraddr, sizeof(union sockaddr_capwap));
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CAPWAP_SET_NETWORK_PORT(&dataaddr, (CAPWAP_GET_NETWORK_PORT(&g_wtp.dtls.peeraddr) + 1));
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#ifdef DEBUG
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{
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char addr[INET6_ADDRSTRLEN];
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capwap_logging_debug("Create data channel with peer %s:%d", capwap_address_to_string(&dataaddr, addr, INET6_ADDRSTRLEN), (int)CAPWAP_GET_NETWORK_PORT(&dataaddr));
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}
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#endif
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/* Bind data address and Connect to AC data channel */
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if (wtp_kmod_bind(g_wtp.net.localaddr.ss.ss_family) ||
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!wtp_kmod_connect(&dataaddr.ss, &g_wtp.sessionid, g_wtp.mtu)) {
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/* Reset AC Prefered List Position */
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g_wtp.acpreferedselected = 0;
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/* Set timer */
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wtp_dfa_change_state(CAPWAP_RUN_STATE);
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capwap_timeout_unset(g_wtp.timeout, g_wtp.idtimercontrol);
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capwap_timeout_set(g_wtp.timeout, g_wtp.idtimerecho, g_wtp.echointerval, wtp_dfa_state_run_echo_timeout, NULL, NULL);
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capwap_timeout_set(g_wtp.timeout, g_wtp.idtimerkeepalivedead, WTP_DATACHANNEL_KEEPALIVEDEAD, wtp_dfa_state_run_keepalivedead_timeout, NULL, NULL);
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} else {
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/* Error to send packets */
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capwap_logging_error("Error to send data channel keepalive packet");
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wtp_teardown_connection();
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}
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}
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/* */
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static void wtp_dfa_state_dtlsteardown_timeout(struct capwap_timeout* timeout, unsigned long index, void* context, void* param) {
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/* Free and reset resource */
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if (g_wtp.dtls.enable) {
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capwap_crypt_freesession(&g_wtp.dtls);
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}
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/* */
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if (g_wtp.acname.name) {
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capwap_free(g_wtp.acname.name);
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g_wtp.acname.name = NULL;
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}
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/* */
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wtp_free_reference_last_request();
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wtp_free_reference_last_response();
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wtp_free_packet_rxmng();
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/* */
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if (!g_wtp.running) {
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wtp_dfa_change_state(CAPWAP_DEAD_STATE);
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} else if ((g_wtp.faileddtlssessioncount >= WTP_FAILED_DTLS_SESSION_RETRY) || (g_wtp.faileddtlsauthfailcount >= WTP_FAILED_DTLS_SESSION_RETRY)) {
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wtp_dfa_change_state(CAPWAP_SULKING_STATE);
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capwap_timeout_set(g_wtp.timeout, g_wtp.idtimercontrol, WTP_SILENT_INTERVAL, wtp_dfa_state_sulking_timeout, NULL, NULL);
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} else {
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wtp_dfa_change_state(CAPWAP_IDLE_STATE);
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wtp_dfa_state_idle();
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}
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}
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/* */
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void wtp_dfa_state_dtlsteardown(struct capwap_parsed_packet* packet) {
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}
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/* Teardown connection */
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void wtp_teardown_connection(void) {
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g_wtp.teardown = 1;
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/* TODO: close SSID ? */
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/* DTSL Control */
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if (g_wtp.dtls.enable) {
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capwap_crypt_close(&g_wtp.dtls);
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}
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/* Close data channel session */
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wtp_kmod_resetsession();
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/* */
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wtp_dfa_change_state(CAPWAP_DTLS_TEARDOWN_STATE);
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capwap_timeout_unsetall(g_wtp.timeout);
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capwap_timeout_set(g_wtp.timeout, g_wtp.idtimercontrol, WTP_DTLS_SESSION_DELETE, wtp_dfa_state_dtlsteardown_timeout, NULL, NULL);
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}
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