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#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <pthread.h>
#include <unistd.h>
#include "nis.h"
#include "stream.h"
#define MAX_CLIENT_IDLE (60 * 1000)
struct stream_client_thread_parms {
int client;
struct plugin_state *state;
};
static void *
stream_client_thread(void *arg)
{
int i, fraglen, last, ret, frag_len, record_len;
int32_t len, nlen;
char fragment[65536], record[65536];
struct pollfd pollfd;
struct stream_client_thread_parms *parms = arg;
struct plugin_state *state = parms->state;
int done, client = parms->client;
free(parms);
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"opened client connection %d, thread started\n",
client);
last = fcntl(client, F_GETFD);
if ((last == -1) ||
(fcntl(client, F_SETFD, last | O_NONBLOCK) == -1)) {
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"error setting new client connection to be "
"non-blocking\n");
close(client);
return NULL;
}
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"set new client connection to be non-blocking\n");
frag_len = 0;
record_len = 0;
done = 0;
while (!done) {
pollfd.fd = client;
pollfd.events = POLLIN | POLLHUP;
if (poll(&pollfd, 1, MAX_CLIENT_IDLE) > 0) {
i = read(client, fragment + frag_len,
sizeof(fragment) - frag_len);
switch (i) {
case -1:
if (errno == EAGAIN) {
continue;
}
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"communication error\n");
done = 1;
break;
case 0:
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"client closed connection\n");
done = 1;
break;
default:
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"read %d bytes\n", i);
frag_len += i;
break;
}
if (frag_len > 4) {
memcpy(&nlen, fragment, 4);
len = ntohl(nlen);
last = ((len & 0x80000000) != 0);
len &= 0x7fffffff;
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"expecting %d bytes\n", len);
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"in: frag_len=%d,record=%d\n",
frag_len, record_len);
if (frag_len >= len + 4) {
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"got whole fragment "
"(%d bytes)\n", len);
/* we have a whole fragment */
memmove(record + record_len,
fragment + 4, len);
record_len += len;
if (last) {
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"got whole "
"record (%d "
"bytes)\n",
record_len);
/* we have a whole record */
nis_process_request(state,
client,
NULL, 0,
record,
record_len);
record_len = 0;
}
memmove(fragment,
fragment + (len + 4),
frag_len - (len + 4));
frag_len -= (len + 4);
}
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"out: frag_len=%d,record=%d\n",
frag_len, record_len);
}
} else {
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"connection timeout\n");
done = 1;
}
}
close(client);
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"closed client connection %d, thread ending\n", client);
return NULL;
}
void
stream_client_start(struct plugin_state *state, int client)
{
pthread_t thread;
struct stream_client_thread_parms *parms;
parms = malloc(sizeof(*parms));
if (parms == NULL) {
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"out of memory\n");
close(client);
return;
}
parms->client = client;
parms->state = state;
if (pthread_create(&thread, NULL, &stream_client_thread, parms) != 0) {
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"error starting thread\n");
close(client);
}
slapi_log_error(SLAPI_LOG_PLUGIN,
state->plugin_desc->spd_id,
"started client-specific thread\n");
return;
}
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