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The capwap data channel migrated from userspace to kernalspace

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This commit is contained in:
vemax78
2014-09-10 21:58:23 +02:00
parent 71006a9121
commit 8d9985fdea
104 changed files with 6967 additions and 4840 deletions
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243
src/ac/ac_session.c
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@ -6,8 +6,8 @@
#include "ac_backend.h"
#include <arpa/inet.h>
#define AC_ERROR_TIMEOUT -1000
#define AC_ERROR_ACTION_SESSION -1001
#define AC_NO_ERROR -1000
#define AC_ERROR_TIMEOUT -1001
/* */
static int ac_session_action_resetwtp(struct ac_session_t* session, struct ac_notify_reset_t* reset) {
@ -39,7 +39,7 @@ static int ac_session_action_resetwtp(struct ac_session_t* session, struct ac_no
capwap_packet_txmng_free(txmngpacket);
/* Send Reset Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], session->requestfragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr)) {
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
ac_dfa_change_state(session, CAPWAP_RESET_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
@ -49,7 +49,7 @@ static int ac_session_action_resetwtp(struct ac_session_t* session, struct ac_no
ac_session_teardown(session);
}
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
}
/* */
@ -62,10 +62,10 @@ static int ac_session_action_addwlan(struct ac_session_t* session, struct ac_not
/* Check if WLAN id is valid and not used */
if (!IS_VALID_RADIOID(notify->radioid) || !IS_VALID_WLANID(notify->wlanid)) {
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
#if 0
} else if (ac_wlans_get_bssid_with_wlanid(session, notify->radioid, notify->wlanid)) {
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
#endif
}
@ -102,7 +102,7 @@ static int ac_session_action_addwlan(struct ac_session_t* session, struct ac_not
capwap_packet_txmng_free(txmngpacket);
/* Send WLAN Configuration Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], session->requestfragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr)) {
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
@ -111,7 +111,7 @@ static int ac_session_action_addwlan(struct ac_session_t* session, struct ac_not
ac_session_teardown(session);
}
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
}
/* */
@ -125,7 +125,7 @@ static int ac_session_action_station_configuration_ieee8011_add_station(struct a
/* Check if RADIO id and WLAN id is valid */
if (!IS_VALID_RADIOID(notify->radioid) || !IS_VALID_WLANID(notify->wlanid)) {
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
}
/* */
@ -167,7 +167,7 @@ static int ac_session_action_station_configuration_ieee8011_add_station(struct a
capwap_packet_txmng_free(txmngpacket);
/* Send Station Configuration Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], session->requestfragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr)) {
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
@ -176,7 +176,7 @@ static int ac_session_action_station_configuration_ieee8011_add_station(struct a
ac_session_teardown(session);
}
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
}
/* */
@ -189,7 +189,7 @@ static int ac_session_action_station_configuration_ieee8011_delete_station(struc
/* Check if RADIO id is valid */
if (!IS_VALID_RADIOID(notify->radioid)) {
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
}
/* */
@ -216,7 +216,7 @@ static int ac_session_action_station_configuration_ieee8011_delete_station(struc
capwap_packet_txmng_free(txmngpacket);
/* Send Station Configuration Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], session->requestfragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr)) {
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
@ -225,12 +225,25 @@ static int ac_session_action_station_configuration_ieee8011_delete_station(struc
ac_session_teardown(session);
}
return AC_ERROR_ACTION_SESSION;
return AC_NO_ERROR;
}
/* */
static int ac_session_action_recv_ieee80211_mgmt_packet(struct ac_session_t* session, struct capwap_header* header, long length) {
long headersize;
/* Retrieve info */
headersize = GET_HLEN_HEADER(header) * 4;
if ((GET_WBID_HEADER(header) == CAPWAP_WIRELESS_BINDING_IEEE80211) && ((length - headersize) >= sizeof(struct ieee80211_header))) {
ac_ieee80211_packet(session, GET_RID_HEADER(header), (struct ieee80211_header*)(((char*)header) + headersize), (length - headersize));
}
return AC_NO_ERROR;
}
/* */
static int ac_session_action_execute(struct ac_session_t* session, struct ac_session_action* action) {
int result = AC_ERROR_ACTION_SESSION;
int result = AC_NO_ERROR;
switch (action->action) {
case AC_SESSION_ACTION_CLOSE: {
@ -248,24 +261,43 @@ static int ac_session_action_execute(struct ac_session_t* session, struct ac_ses
break;
}
case AC_SESSION_ACTION_ESTABLISHED_SESSION_DATA: {
int valid = 0;
struct ac_soap_response* response;
case AC_SESSION_ACTION_RECV_KEEPALIVE: {
#ifdef DEBUG
{
char sessionname[33];
capwap_sessionid_printf(&session->sessionid, sessionname);
capwap_logging_debug("Receive Keep-Alive from %s", sessionname);
}
#endif
/* Send keep-alive response */
ac_kmod_send_keepalive(&session->sockaddrdata.ss);
capwap_timeout_set(session->timeout, session->idtimerkeepalivedead, AC_MAX_DATA_KEEPALIVE_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
/* Capwap handshake complete, notify event to backend */
response = ac_soap_runningwtpsession(session, session->wtpid);
if (response) {
valid = ((response->responsecode == HTTP_RESULT_OK) ? 1 : 0);
ac_soapclient_free_response(response);
/* */
if (session->state == CAPWAP_DATA_CHECK_TO_RUN_STATE) {
struct ac_soap_response* response;
/* Capwap handshake complete, notify event to backend */
response = ac_soap_runningwtpsession(session, session->wtpid);
if (response) {
if (response->responsecode == HTTP_RESULT_OK) {
ac_dfa_change_state(session, CAPWAP_RUN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_MAX_ECHO_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
} else {
result = CAPWAP_ERROR_CLOSE;
}
ac_soapclient_free_response(response);
} else {
result = CAPWAP_ERROR_CLOSE;
}
}
if (valid) {
ac_dfa_change_state(session, CAPWAP_RUN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_MAX_ECHO_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
} else {
result = CAPWAP_ERROR_CLOSE;
}
break;
}
case AC_SESSION_ACTION_RECV_IEEE80211_MGMT_PACKET: {
result = ac_session_action_recv_ieee80211_mgmt_packet(session, (struct capwap_header*)action->data, action->length);
break;
}
@ -289,6 +321,18 @@ static int ac_session_action_execute(struct ac_session_t* session, struct ac_ses
result = ac_session_action_station_configuration_ieee8011_delete_station(session, (struct ac_notify_station_configuration_ieee8011_delete_station*)action->data);
break;
}
case AC_SESSION_ACTION_STATION_ROAMING: {
struct ac_station* station;
/* Delete station */
station = ac_stations_get_station(session, RADIOID_ANY, NULL, (uint8_t*)action->data);
if (station) {
ac_stations_delete_station(session, station);
}
break;
}
}
return result;
@ -324,8 +368,6 @@ static int ac_network_read(struct ac_session_t* session, void* buffer, int lengt
} else if (session->packets->count > 0) {
struct capwap_list_item* itempacket;
capwap_logging_debug("Receive control packet");
/* Get packet */
itempacket = capwap_itemlist_remove_head(session->packets);
capwap_lock_exit(&session->sessionlock);
@ -344,7 +386,7 @@ static int ac_network_read(struct ac_session_t* session, void* buffer, int lengt
if ((oldaction == CAPWAP_DTLS_ACTION_HANDSHAKE) && (session->dtls.action == CAPWAP_DTLS_ACTION_DATA)) {
if (session->state == CAPWAP_DTLS_CONNECT_STATE) {
ac_dfa_change_state(session, CAPWAP_JOIN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_JOIN_INTERVAL, ac_dfa_state_join_timeout, session, NULL);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_JOIN_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
}
}
}
@ -420,11 +462,6 @@ static void ac_dfa_execute(struct ac_session_t* session, struct capwap_parsed_pa
break;
}
case CAPWAP_DATA_CHECK_TO_RUN_STATE: {
ac_dfa_state_datacheck_to_run(session, packet);
break;
}
case CAPWAP_RUN_STATE: {
ac_dfa_state_run(session, packet);
break;
@ -472,7 +509,7 @@ static void ac_send_invalid_request(struct ac_session_t* session, uint32_t error
capwap_packet_txmng_free(txmngpacket);
/* Send unknown response */
capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], responsefragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr);
capwap_crypt_sendto_fragmentpacket(&session->dtls, responsefragmentpacket);
/* Don't buffering a packets sent */
capwap_list_free(responsefragmentpacket);
@ -491,12 +528,6 @@ static void ac_session_destroy(struct ac_session_t* session) {
capwap_logging_debug("Release Session AC %s", sessionname);
#endif
/* Release session data reference */
if (session->sessiondata) {
ac_session_data_close(session->sessiondata);
ac_session_data_release_reference(session->sessiondata);
}
/* Release last reference */
capwap_lock_enter(&session->sessionlock);
session->count--;
@ -523,6 +554,9 @@ static void ac_session_destroy(struct ac_session_t* session) {
capwap_lock_exit(&session->sessionlock);
/* Close data channel */
ac_kmod_delete_datasession(&session->sockaddrdata.ss, &session->sessionid);
/* Free DTSL Control */
capwap_crypt_freesession(&session->dtls);
@ -563,38 +597,6 @@ static void ac_session_destroy(struct ac_session_t* session) {
capwap_itemlist_free(session->itemlist);
}
/* */
static void ac_session_report_connection(struct ac_session_t* session) {
char localip[INET6_ADDRSTRLEN + 10] = "";
char remoteip[INET6_ADDRSTRLEN + 10] = "";
if (session->connection.localaddr.ss_family == AF_INET) {
char buffer[INET_ADDRSTRLEN];
inet_ntop(AF_INET, (void*)&((struct sockaddr_in*)&session->connection.localaddr)->sin_addr, buffer, INET_ADDRSTRLEN);
sprintf(localip, "%s:%hu", buffer, ntohs(((struct sockaddr_in*)&session->connection.localaddr)->sin_port));
} else if (session->connection.localaddr.ss_family == AF_INET6) {
char buffer[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, (void*)&((struct sockaddr_in6*)&session->connection.localaddr)->sin6_addr, buffer, INET6_ADDRSTRLEN);
sprintf(localip, "%s:%hu", buffer, ntohs(((struct sockaddr_in6*)&session->connection.localaddr)->sin6_port));
}
if (session->connection.remoteaddr.ss_family == AF_INET) {
char buffer[INET_ADDRSTRLEN];
inet_ntop(AF_INET, (void*)&((struct sockaddr_in*)&session->connection.remoteaddr)->sin_addr, buffer, INET_ADDRSTRLEN);
sprintf(remoteip, "%s:%hu", buffer, ntohs(((struct sockaddr_in*)&session->connection.remoteaddr)->sin_port));
} else if (session->connection.remoteaddr.ss_family == AF_INET6) {
char buffer[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, (void*)&((struct sockaddr_in6*)&session->connection.remoteaddr)->sin6_addr, buffer, INET6_ADDRSTRLEN);
sprintf(remoteip, "%s:%hu", buffer, ntohs(((struct sockaddr_in6*)&session->connection.remoteaddr)->sin6_port));
}
capwap_logging_info("Start control channel from %s to %s", remoteip, localip);
}
/* */
static void ac_session_run(struct ac_session_t* session) {
int res;
@ -605,9 +607,6 @@ static void ac_session_run(struct ac_session_t* session) {
ASSERT(session != NULL);
/* */
ac_session_report_connection(session);
/* Configure DFA */
if (g_ac.enabledtls) {
if (!ac_dtls_setup(session)) {
@ -616,7 +615,7 @@ static void ac_session_run(struct ac_session_t* session) {
} else {
/* Wait Join request */
ac_dfa_change_state(session, CAPWAP_JOIN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_JOIN_INTERVAL, ac_dfa_state_join_timeout, session, NULL);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_JOIN_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
}
while (session->state != CAPWAP_DTLS_TEARDOWN_STATE) {
@ -628,24 +627,31 @@ static void ac_session_run(struct ac_session_t* session) {
}
} else if (length > 0) {
/* Check generic capwap packet */
check = capwap_sanity_check(1, CAPWAP_UNDEF_STATE, buffer, length, 0, 0);
check = capwap_sanity_check(CAPWAP_UNDEF_STATE, buffer, length, 0);
if (check == CAPWAP_PLAIN_PACKET) {
struct capwap_parsed_packet packet;
/* Defragment management */
if (!session->rxmngpacket) {
session->rxmngpacket = capwap_packet_rxmng_create_message(CAPWAP_CONTROL_PACKET);
session->rxmngpacket = capwap_packet_rxmng_create_message();
}
/* If request, defragmentation packet */
check = capwap_packet_rxmng_add_recv_packet(session->rxmngpacket, buffer, length);
if (check == CAPWAP_RECEIVE_COMPLETE_PACKET) {
/* Receive all fragment */
if (!capwap_recv_retrasmitted_request(&session->dtls, session->rxmngpacket, &session->connection, session->lastrecvpackethash, session->responsefragmentpacket)) {
if (capwap_is_request_type(session->rxmngpacket->ctrlmsg.type) && (session->remotetype == session->rxmngpacket->ctrlmsg.type) && (session->remoteseqnumber == session->rxmngpacket->ctrlmsg.seq)) {
/* Retransmit response */
if (!capwap_crypt_sendto_fragmentpacket(&session->dtls, session->responsefragmentpacket)) {
capwap_logging_error("Error to resend response packet");
} else {
capwap_logging_debug("Retrasmitted control packet");
}
} else {
/* Check message type */
res = capwap_check_message_type(session->rxmngpacket);
if (res == VALID_MESSAGE_TYPE) {
res = capwap_parsing_packet(session->rxmngpacket, &session->connection, &packet);
res = capwap_parsing_packet(session->rxmngpacket, &packet);
if (res == PARSING_COMPLETE) {
int hasrequest = capwap_is_request_type(session->rxmngpacket->ctrlmsg.type);
@ -713,8 +719,6 @@ static void ac_session_run(struct ac_session_t* session) {
ac_send_invalid_request(session, CAPWAP_RESULTCODE_MSG_UNEXPECTED_UNRECOGNIZED_REQUEST);
}
}
} else {
capwap_logging_debug("Retrasmitted control packet");
}
/* Free memory */
@ -821,9 +825,19 @@ void ac_session_teardown(struct ac_session_t* session) {
}
}
/* Remove timer */
if (session->idtimercontrol != CAPWAP_TIMEOUT_INDEX_NO_SET) {
capwap_timeout_unset(session->timeout, session->idtimercontrol);
session->idtimercontrol = CAPWAP_TIMEOUT_INDEX_NO_SET;
}
if (session->idtimerkeepalivedead != CAPWAP_TIMEOUT_INDEX_NO_SET) {
capwap_timeout_unset(session->timeout, session->idtimerkeepalivedead);
session->idtimerkeepalivedead = CAPWAP_TIMEOUT_INDEX_NO_SET;
}
/* */
ac_dfa_change_state(session, CAPWAP_DTLS_TEARDOWN_STATE);
capwap_timeout_unset(session->timeout, session->idtimercontrol);
}
/* */
@ -850,53 +864,31 @@ void* ac_session_thread(void* param) {
/* */
void ac_get_control_information(struct capwap_list* controllist) {
struct capwap_list* addrlist;
int count;
struct capwap_list_item* item;
ASSERT(controllist != NULL);
/* Detect local address */
addrlist = capwap_list_create();
capwap_interface_list(&g_ac.net, addrlist);
/* */
capwap_rwlock_rdlock(&g_ac.sessionslock);
count = g_ac.sessions->count;
capwap_rwlock_exit(&g_ac.sessionslock);
/* Prepare control list */
for (item = addrlist->first; item != NULL; item = item->next) {
for (item = g_ac.addrlist->first; item != NULL; item = item->next) {
struct capwap_list_item* itemcontrol;
struct ac_session_control* sessioncontrol;
struct sockaddr_storage* address = (struct sockaddr_storage*)item->item;
union sockaddr_capwap* address = (union sockaddr_capwap*)item->item;
/* */
itemcontrol = capwap_itemlist_create(sizeof(struct ac_session_control));
sessioncontrol = (struct ac_session_control*)itemcontrol->item;
memcpy(&sessioncontrol->localaddress, address, sizeof(struct sockaddr_storage));
sessioncontrol->count = 0;
memcpy(&sessioncontrol->localaddress, address, sizeof(union sockaddr_capwap));
sessioncontrol->count = count;
/* Add */
capwap_itemlist_insert_after(controllist, NULL, itemcontrol);
}
/* Free local address list */
capwap_list_free(addrlist);
/* */
capwap_rwlock_rdlock(&g_ac.sessionslock);
/* Get wtp count from any local address */
for (item = controllist->first; item != NULL; item = item->next) {
struct capwap_list_item* search;
struct ac_session_control* sessioncontrol = (struct ac_session_control*)item->item;
for (search = g_ac.sessions->first; search != NULL; search = search->next) {
struct ac_session_t* session = (struct ac_session_t*)search->item;
if (!capwap_compare_ip(&session->connection.localaddr, &sessioncontrol->localaddress)) {
sessioncontrol->count++;
}
}
}
/* */
capwap_rwlock_exit(&g_ac.sessionslock);
}
/* */
@ -911,7 +903,8 @@ void ac_free_reference_last_response(struct ac_session_t* session) {
ASSERT(session);
capwap_list_flush(session->responsefragmentpacket);
memset(&session->lastrecvpackethash[0], 0, sizeof(session->lastrecvpackethash));
session->remotetype = 0;
session->remoteseqnumber = 0;
}
/* */
@ -973,17 +966,20 @@ void ac_dfa_retransmition_timeout(struct capwap_timeout* timeout, unsigned long
struct ac_session_t* session = (struct ac_session_t*)context;
if (!session->requestfragmentpacket->count) {
capwap_logging_warning("Invalid retransmition request packet");
ac_session_teardown(session);
} else {
session->retransmitcount++;
if (session->retransmitcount >= AC_MAX_RETRANSMIT) {
capwap_logging_info("Retransmition request packet timeout");
/* Timeout reset state */
ac_free_reference_last_request(session);
ac_session_teardown(session);
} else {
/* Retransmit Reset Request */
/* Retransmit Request */
capwap_logging_debug("Retransmition request packet");
if (!capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], session->requestfragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr)) {
if (!capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
capwap_logging_error("Error to send request packet");
}
@ -994,5 +990,6 @@ void ac_dfa_retransmition_timeout(struct capwap_timeout* timeout, unsigned long
}
void ac_dfa_teardown_timeout(struct capwap_timeout* timeout, unsigned long index, void* context, void* param) {
capwap_logging_info("Session timeout, teardown");
ac_session_teardown((struct ac_session_t*)context);
}