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Add critical section on netlink send message

This commit is contained in:
vemax78 2014-12-24 13:31:24 +01:00
parent 33ea96d9f5
commit 80b1780d92
2 changed files with 27 additions and 17 deletions
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43
src/ac/ac_kmod.c
View File

@ -142,28 +142,31 @@ static int ac_kmod_send_and_recv(struct nl_sock* nl, struct nl_cb* nl_cb, struct
return -1;
}
/* */
capwap_lock_enter(&g_ac.kmodhandle.msglock);
/* Complete send message */
result = nl_send_auto_complete(nl, msg);
if (result < 0) {
nl_cb_put(cb);
return -1;
}
/* Customize message callback */
nl_cb_err(cb, NL_CB_CUSTOM, ac_kmod_error_handler, &result);
nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, ac_kmod_finish_handler, &result);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ac_kmod_ack_handler, &result);
if (valid_cb) {
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, valid_cb, data);
}
result = 1;
while (result > 0) {
nl_recvmsgs(nl, cb);
if (result >= 0) {
/* Customize message callback */
nl_cb_err(cb, NL_CB_CUSTOM, ac_kmod_error_handler, &result);
nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, ac_kmod_finish_handler, &result);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ac_kmod_ack_handler, &result);
if (valid_cb) {
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, valid_cb, data);
}
result = 1;
while (result > 0) {
nl_recvmsgs(nl, cb);
}
}
/* */
capwap_lock_exit(&g_ac.kmodhandle.msglock);
nl_cb_put(cb);
return result;
}
@ -623,6 +626,9 @@ int ac_kmod_deauthorize_station(struct capwap_sessionid_element* sessionid, cons
int ac_kmod_init(void) {
int result;
/* */
capwap_lock_init(&g_ac.kmodhandle.msglock);
/* Configure netlink callback */
g_ac.kmodhandle.nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
if (!g_ac.kmodhandle.nl_cb) {
@ -693,6 +699,9 @@ void ac_kmod_free(void) {
nl_cb_put(g_ac.kmodhandle.nlmsg_cb);
}
/* */
capwap_lock_destroy(&g_ac.kmodhandle.msglock);
/* */
memset(&g_ac.kmodhandle, 0, sizeof(struct ac_kmod_handle));
}

1
src/ac/ac_kmod.h
View File

@ -24,6 +24,7 @@ struct ac_kmod_handle {
int nlsmartcapwap_id;
/* Send message */
capwap_lock_t msglock;
struct nl_sock* nlmsg;
struct nl_cb* nlmsg_cb;
};