/**
* Creates listening socket to serve as a conduit between userland
* applications and the system. Starts listening on all sockets
* thereafter.
*/
void
initiate_backend(engine *eng)
{
TRACE_BACKEND_FUNC_START();
struct pollfd pollfd[MAX_INLINKS];
uint polli;
uint i;
/* initializing main while loop parameters */
polli = 0;
memset(pollfd, 0, sizeof(pollfd));
/* create listening socket */
create_listening_socket_for_eng(eng);
TRACE_LOG("Engine %s is listening on port %d\n",
eng->name, eng->listen_port);
/* adjust pcapr context in engine */
if (!strcmp(eng->FIRST_BRICK(esrc)->brick->elib->getId(), "PcapReader")) {
eng->pcapr_context = eng->FIRST_BRICK(esrc)->brick->private_data;
}
/* register iom socket */
for (i = 0; i < eng->no_of_sources; i++) {
pollfd[polli].fd = eng->esrc[i]->dev_fd;
pollfd[polli].events = POLLIN | POLLRDNORM;
pollfd[polli].revents = 0;
++polli;
}
/* keep on running till engine stops */
while (eng->run == 1) {
i = poll(pollfd, polli+1, 2500);
/* if no packet came up, try polling again */
if (i <= 0) continue;
for (i = 0; i < eng->no_of_sources; i++)
if (!(pollfd[i].revents & POLLERR))
eng->iom.callback(eng->esrc[i]);
#if 0
/* XXX - temporarily disabled */
/* process app reqs */
else if ((int)chlist[n].ident == eng->listen_fd)
process_request_backend(eng, chlist);
#endif
/* pcap handling.. */
if (eng->pcapr_context != NULL)
process_pcap_read_request(eng, eng->pcapr_context);
}
TRACE_BACKEND_FUNC_END();
}
/**
* Creates listening socket to serve as a conduit between userland
* applications and the system. Starts listening on all sockets
* thereafter.
*/
void
initiate_backend(engine *eng)
{
TRACE_BACKEND_FUNC_START();
struct pollfd pollfd[MAX_INLINKS];
uint polli;
uint dev_flag, i;
/* initializing main while loop parameters */
dev_flag = 0;
polli = 0;
memset(pollfd, 0, sizeof(pollfd));
/* create listening socket */
create_listening_socket_for_eng(eng);
TRACE_LOG("Engine %s is listening on port %d\n",
eng->name, eng->listen_port);
/* register iom socket */
for (i = 0; i < eng->no_of_sources; i++) {
pollfd[polli].fd = eng->esrc[i]->dev_fd;
pollfd[polli].events = POLLIN | POLLRDNORM;
pollfd[polli].revents = 0;
++polli;
}
/* keep on running till engine stops */
while (eng->run == 1) {
i = poll(pollfd, polli+1, 2500);
/* if no packet came up, try polling again */
if (i <= 0) continue;
for (i = 0; i < eng->no_of_sources; i++)
eng->iom.callback(eng->esrc[i]);
#if 0
/* XXX - temporarily disabled */
/* process app reqs */
else if ((int)chlist[n].ident == eng->listen_fd)
process_request_backend(eng, chlist);
#endif
}
/**
* Creates listening socket to serve as a conduit between userland
* applications and the system. Starts listening on all sockets
* thereafter.
*/
void
initiate_backend(engine *eng)
{
TRACE_BACKEND_FUNC_START();
struct epoll_event ev, events[EPOLL_MAX_EVENTS];
int epoll_fd, nfds, n;
uint i, dev_flag;
dev_flag = 0;
/* set up the epolling structure */
epoll_fd = epoll_create(EPOLL_MAX_EVENTS);
if (epoll_fd == -1) {
TRACE_LOG("Engine %s failed to create an epoll fd!\n",
eng->name);
TRACE_BACKEND_FUNC_END();
return;
}
/* create listening socket */
create_listening_socket_for_eng(eng);
/* register listening socket */
ev.events = EPOLLIN | EPOLLOUT;
ev.data.fd = eng->listen_fd;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, eng->listen_fd, &ev) == -1) {
TRACE_LOG("Engine %s failed to exe epoll_ctl for fd: %d\n",
eng->name, epoll_fd);
TRACE_BACKEND_FUNC_END();
return;
}
TRACE_LOG("Engine %s is listening on port %d\n",
eng->name, eng->listen_port);
/* adjust pcapr context in engine */
if (!strcmp(eng->FIRST_BRICK(esrc)->brick->elib->getId(), "PcapReader")) {
eng->pcapr_context = eng->FIRST_BRICK(esrc)->brick->private_data;
}
/* register iom socket */
for (i = 0; i < eng->no_of_sources; i++) {
ev.events = EPOLLIN;
ev.data.fd = eng->esrc[i]->dev_fd;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, eng->esrc[i]->dev_fd, &ev) == -1) {
TRACE_LOG("Engine %s failed to exe epoll_ctl for fd: %d\n",
eng->name, epoll_fd);
TRACE_BACKEND_FUNC_END();
return;
}
}
/* keep on running till engine stops */
while (eng->run == 1) {
nfds = epoll_wait(epoll_fd, events, EPOLL_MAX_EVENTS, EPOLL_TIMEOUT);
if (nfds == -1) {
TRACE_ERR("epoll error (engine: %s)\n",
eng->name);
TRACE_BACKEND_FUNC_END();
}
for (n = 0; n < nfds; n++) {
/* process dev work (check for all devs) */
for (i = 0; i < eng->no_of_sources; i++) {
if (events[n].data.fd == eng->esrc[i]->dev_fd) {
eng->iom.callback(eng->esrc[i]);
/* continue epolling */
ev.data.fd = eng->esrc[i]->dev_fd;
ev.events = EPOLLIN;
if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, ev.data.fd, &ev) == -1) {
TRACE_LOG("Engine %s failed to exe epoll_ctl for fd: %d\n",
eng->name, epoll_fd);
TRACE_BACKEND_FUNC_END();
return;
}
dev_flag = 1;
}
}
if (dev_flag == 1) {
dev_flag = 0;
continue;
}
/* process app reqs */
if (events[n].data.fd == eng->listen_fd)
process_request_backend(eng, epoll_fd);
else {/* all other reqs coming from client socks */
ev.data.fd = events[n].data.fd;
if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, ev.data.fd, &ev) == -1) {
TRACE_ERR("Can't delete client sock for epolling!\n");
TRACE_BACKEND_FUNC_END();
}
close(ev.data.fd);
}
}
/* pcap handling.. */
if (eng->pcapr_context != NULL)
process_pcap_read_request(eng, eng->pcapr_context);
}
TRACE_BACKEND_FUNC_END();
}
