7u83/freewtp
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Permit to forward IEEE802.11 Data Packet from kernel space to user space bypass

Browse Source 
kernel network stack.
This commit is contained in:
vemax78
2014-06-07 22:37:19 +02:00
parent 92c86462dc
commit 67daa8dcbb
13 changed files with 385 additions and 174 deletions
Download Patch File Download Diff File Expand all files Collapse all files

135
src/wtp/wtp_dfa.c
View File

@ -158,15 +158,27 @@ static int wtp_recvfrom(struct wtp_fds* fds, void* buffer, int* size, struct soc
index = capwap_wait_recvready(fds->fdspoll, fds->fdstotalcount, g_wtp.timeout);
if (index < 0) {
return index;
} else if (index >= fds->fdsnetworkcount) {
int pos = index - fds->fdsnetworkcount;
} else if ((fds->wifieventsstartpos >= 0) && (index >= fds->wifieventsstartpos)) {
int pos = index - fds->wifieventsstartpos;
if (pos < fds->eventscount) {
if (!fds->events[pos].event_handler) {
if (pos < fds->wifieventscount) {
if (!fds->wifievents[pos].event_handler) {
return CAPWAP_RECV_ERROR_SOCKET;
}
fds->events[pos].event_handler(fds->fdspoll[index].fd, fds->events[pos].params, fds->events[pos].paramscount);
fds->wifievents[pos].event_handler(fds->fdspoll[index].fd, fds->wifievents[pos].params, fds->wifievents[pos].paramscount);
}
return WTP_RECV_NOERROR_RADIO;
} else if ((fds->kmodeventsstartpos >= 0) && (index >= fds->kmodeventsstartpos)) {
int pos = index - fds->kmodeventsstartpos;
if (pos < fds->kmodeventscount) {
if (!fds->kmodevents[pos].event_handler) {
return CAPWAP_RECV_ERROR_SOCKET;
}
fds->kmodevents[pos].event_handler(fds->fdspoll[index].fd, fds->kmodevents[pos].params, fds->kmodevents[pos].paramscount);
}
return WTP_RECV_NOERROR_RADIO;
@ -181,21 +193,115 @@ static int wtp_recvfrom(struct wtp_fds* fds, void* buffer, int* size, struct soc
}
/* */
static void wtp_dfa_init_fdspool(struct wtp_fds* fds, struct capwap_network* net) {
static int wtp_dfa_init_fdspool(struct wtp_fds* fds, struct capwap_network* net) {
ASSERT(fds != NULL);
ASSERT(net != NULL);
/* */
memset(fds, 0, sizeof(struct wtp_fds));
fds->fdstotalcount = CAPWAP_MAX_SOCKETS * 2;
fds->fdspoll = (struct pollfd*)capwap_alloc(sizeof(struct pollfd) * fds->fdstotalcount);
fds->fdsnetworkcount = capwap_network_set_pollfd(net, NULL, 0);
fds->fdspoll = (struct pollfd*)capwap_alloc(sizeof(struct pollfd) * fds->fdsnetworkcount);
/* Retrive all socket for polling */
fds->fdsnetworkcount = capwap_network_set_pollfd(net, fds->fdspoll, fds->fdstotalcount);
fds->fdstotalcount = fds->fdsnetworkcount;
fds->fdstotalcount = capwap_network_set_pollfd(net, fds->fdspoll, fds->fdsnetworkcount);
if (fds->fdsnetworkcount != fds->fdstotalcount) {
capwap_free(fds->fdspoll);
return -1;
}
/* Update Event File Descriptor */
wtp_radio_update_fdevent(fds);
wtp_dfa_update_fdspool(fds);
return 0;
}
/* */
int wtp_dfa_update_fdspool(struct wtp_fds* fds) {
int totalcount;
int kmodcount;
int wificount;
struct pollfd* fdsbuffer;
ASSERT(fds != NULL);
/* Retrieve number of Dynamic File Descriptor Event */
kmodcount = wtp_kmod_getfd(NULL, NULL, 0);
wificount = wifi_event_getfd(NULL, NULL, 0);
if ((kmodcount < 0) || (wificount < 0)) {
return -1;
}
/* Kernel Module Events Callback */
fds->kmodeventsstartpos = -1;
if (kmodcount != fds->kmodeventscount) {
if (fds->kmodevents) {
capwap_free(fds->kmodevents);
}
/* */
fds->kmodeventscount = kmodcount;
fds->kmodevents = (struct wtp_kmod_event*)((wificount > 0) ? capwap_alloc(sizeof(struct wtp_kmod_event) * kmodcount) : NULL);
}
/* Wifi Events Callback */
fds->wifieventsstartpos = -1;
if (wificount != fds->wifieventscount) {
if (fds->wifievents) {
capwap_free(fds->wifievents);
}
/* */
fds->wifieventscount = wificount;
fds->wifievents = (struct wifi_event*)((wificount > 0) ? capwap_alloc(sizeof(struct wifi_event) * wificount) : NULL);
}
/* Resize poll */
totalcount = fds->fdsnetworkcount + fds->kmodeventscount + fds->wifieventscount;
if (fds->fdstotalcount != totalcount) {
fdsbuffer = (struct pollfd*)capwap_alloc(sizeof(struct pollfd) * totalcount);
if (fds->fdspoll) {
if (fds->fdsnetworkcount > 0) {
memcpy(fdsbuffer, fds->fdspoll, sizeof(struct pollfd) * fds->fdsnetworkcount);
}
capwap_free(fds->fdspoll);
}
/* */
fds->fdspoll = fdsbuffer;
fds->fdstotalcount = totalcount;
}
/* Retrieve File Descriptor Kernel Module Event */
if (fds->kmodeventscount > 0) {
fds->kmodeventsstartpos = fds->fdsnetworkcount;
wtp_kmod_getfd(&fds->fdspoll[fds->kmodeventsstartpos], fds->kmodevents, fds->kmodeventscount);
}
/* Retrieve File Descriptor Wifi Event */
if (fds->wifieventscount > 0) {
fds->wifieventsstartpos = fds->fdsnetworkcount + fds->kmodeventscount;
wifi_event_getfd(&fds->fdspoll[fds->wifieventsstartpos], fds->wifievents, fds->wifieventscount);
}
return fds->fdstotalcount;
}
/* */
void wtp_dfa_free_fdspool(struct wtp_fds* fds) {
ASSERT(fds != NULL);
if (fds->fdspoll) {
capwap_free(fds->fdspoll);
}
if (fds->kmodevents) {
capwap_free(fds->kmodevents);
}
if (fds->wifievents) {
capwap_free(fds->wifievents);
}
}
/* */
@ -242,7 +348,9 @@ int wtp_dfa_running(void) {
memset(&packet, 0, sizeof(struct capwap_parsed_packet));
/* Configure poll struct */
wtp_dfa_init_fdspool(&g_wtp.fds, &g_wtp.net);
if (wtp_dfa_init_fdspool(&g_wtp.fds, &g_wtp.net)) {
return CAPWAP_GENERIC_ERROR;
}
/* Handler signal */
g_wtp.running = 1;
@ -453,8 +561,7 @@ int wtp_dfa_running(void) {
}
/* Free memory */
wtp_free_fds(&g_wtp.fds);
wtp_dfa_free_fdspool(&g_wtp.fds);
return result;
}