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/*
* (C) 2009 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* TCP support has been sponsored by 6WIND <www.6wind.com>.
*/
#include <stdlib.h>
#include <libnfnetlink/libnfnetlink.h>
#include "channel.h"
#include "tcp.h"
static void
*channel_tcp_open(void *conf)
{
struct tcp_channel *m;
struct tcp_conf *c = conf;
m = calloc(sizeof(struct tcp_channel), 1);
if (m == NULL)
return NULL;
m->client = tcp_client_create(c);
if (m->client == NULL) {
free(m);
return NULL;
}
m->server = tcp_server_create(c);
if (m->server == NULL) {
tcp_client_destroy(m->client);
free(m);
return NULL;
}
return m;
}
static int
channel_tcp_send(void *channel, const void *data, int len)
{
struct tcp_channel *m = channel;
return tcp_send(m->client, data, len);
}
static int
channel_tcp_recv(void *channel, char *buf, int size)
{
struct tcp_channel *m = channel;
return tcp_recv(m->server, buf, size);
}
static void
channel_tcp_close(void *channel)
{
struct tcp_channel *m = channel;
tcp_client_destroy(m->client);
tcp_server_destroy(m->server);
free(m);
}
static int
channel_tcp_get_fd(void *channel)
{
struct tcp_channel *m = channel;
return tcp_get_fd(m->server);
}
static void
channel_tcp_stats(struct channel *c, int fd)
{
struct tcp_channel *m = c->data;
char ifname[IFNAMSIZ], buf[512];
int size;
if_indextoname(c->channel_ifindex, ifname);
size = tcp_snprintf_stats(buf, sizeof(buf), ifname,
m->client, m->server);
send(fd, buf, size, 0);
}
static void
channel_tcp_stats_extended(struct channel *c, int active,
struct nlif_handle *h, int fd)
{
struct tcp_channel *m = c->data;
char ifname[IFNAMSIZ], buf[512];
const char *status;
unsigned int flags;
int size;
if_indextoname(c->channel_ifindex, ifname);
nlif_get_ifflags(h, c->channel_ifindex, &flags);
/*
* IFF_UP shows administrative status
* IFF_RUNNING shows carrier status
*/
if (flags & IFF_UP) {
if (!(flags & IFF_RUNNING))
status = "NO-CARRIER";
else
status = "RUNNING";
} else {
status = "DOWN";
}
size = tcp_snprintf_stats2(buf, sizeof(buf),
ifname, status, active,
&m->client->stats,
&m->server->stats);
send(fd, buf, size, 0);
}
static int
channel_tcp_isset(struct channel *c, fd_set *readfds)
{
struct tcp_channel *m = c->data;
return tcp_isset(m->server, readfds);
}
static int
channel_tcp_accept_isset(struct channel *c, fd_set *readfds)
{
struct tcp_channel *m = c->data;
return tcp_accept_isset(m->server, readfds);
}
static int
channel_tcp_accept(struct channel *c)
{
struct tcp_channel *m = c->data;
return tcp_accept(m->server);
}
struct channel_ops channel_tcp = {
.headersiz = 40, /* IP header (20 bytes) + TCP header 20 (bytes) */
.type = CHANNEL_T_STREAM,
.open = channel_tcp_open,
.close = channel_tcp_close,
.send = channel_tcp_send,
.recv = channel_tcp_recv,
.accept = channel_tcp_accept,
.get_fd = channel_tcp_get_fd,
.isset = channel_tcp_isset,
.accept_isset = channel_tcp_accept_isset,
.stats = channel_tcp_stats,
.stats_extended = channel_tcp_stats_extended,
};
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