packages: sort network related packages into package/network/

SVN-Revision: 33688

1 files changed, 0 insertions, 991 deletions

diff --git a/package/ead/src/ead.c b/package/ead/src/ead.c
deleted file mode 100644
index 36235207bc..0000000000
--- a/package/ead/src/ead.c
+++ /dev/null
@@ -1,991 +0,0 @@
-/*
- * Emergency Access Daemon
- * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/select.h>
-#include <stdio.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <pcap.h>
-#include <pcap-bpf.h>
-#include <t_pwd.h>
-#include <t_read.h>
-#include <t_sha.h>
-#include <t_defines.h>
-#include <t_server.h>
-
-#include "list.h"
-#include "ead.h"
-#include "ead-pcap.h"
-#include "ead-crypt.h"
-
-#include "filter.c"
-
-#ifdef linux
-#include "libbridge_init.c"
-#endif
-
-#ifdef linux
-#include <linux/if_packet.h>
-#endif
-
-#define PASSWD_FILE	"/etc/passwd"
-
-#ifndef DEFAULT_IFNAME
-#define DEFAULT_IFNAME "eth0"
-#endif
-
-#ifndef DEFAULT_DEVNAME
-#define DEFAULT_DEVNAME "Unknown"
-#endif
-
-#define PCAP_MRU		1600
-#define PCAP_TIMEOUT	200
-
-#if EAD_DEBUGLEVEL >= 1
-#define DEBUG(n, format, ...) do { \
-	if (EAD_DEBUGLEVEL >= n) \
-		fprintf(stderr, format, ##__VA_ARGS__); \
-} while (0);
-
-#else
-#define DEBUG(n, format, ...) do {} while(0)
-#endif
-
-struct ead_instance {
-	struct list_head list;
-	char ifname[16];
-	int pid;
-	char id;
-#ifdef linux
-	char bridge[16];
-	bool br_check;
-#endif
-};
-
-static char ethmac[6] = "\x00\x13\x37\x00\x00\x00"; /* last 3 bytes will be randomized */
-static pcap_t *pcap_fp = NULL;
-static pcap_t *pcap_fp_rx = NULL;
-static char pktbuf_b[PCAP_MRU];
-static struct ead_packet *pktbuf = (struct ead_packet *)pktbuf_b;
-static u16_t nid = 0xffff; /* node id */
-static char username[32] = "";
-static int state = EAD_TYPE_SET_USERNAME;
-static const char *passwd_file = PASSWD_FILE;
-static const char password[MAXPARAMLEN];
-static bool child_pending = false;
-
-static unsigned char abuf[MAXPARAMLEN + 1];
-static unsigned char pwbuf[MAXPARAMLEN];
-static unsigned char saltbuf[MAXSALTLEN];
-static unsigned char pw_saltbuf[MAXSALTLEN];
-static struct list_head instances;
-static const char *dev_name = DEFAULT_DEVNAME;
-static bool nonfork = false;
-static struct ead_instance *instance = NULL;
-
-static struct t_pwent tpe = {
-	.name = username,
-	.index = 1,
-	.password.data = pwbuf,
-	.password.len = 0,
-	.salt.data = saltbuf,
-	.salt.len = 0,
-};
-struct t_confent *tce = NULL;
-static struct t_server *ts = NULL;
-static struct t_num A, *B = NULL;
-unsigned char *skey;
-
-static void
-set_recv_type(pcap_t *p, bool rx)
-{
-#ifdef PACKET_RECV_TYPE
-	struct sockaddr_ll sll;
-	struct ifreq ifr;
-	int ifindex, mask;
-	int fd, ret;
-
-	fd = pcap_get_selectable_fd(p);
-	if (fd < 0)
-		return;
-
-	if (rx)
-		mask = 1 << PACKET_BROADCAST;
-	else
-		mask = 0;
-
-	ret = setsockopt(fd, SOL_PACKET, PACKET_RECV_TYPE, &mask, sizeof(mask));
-#endif
-}
-
-
-static pcap_t *
-ead_open_pcap(const char *ifname, char *errbuf, bool rx)
-{
-	pcap_t *p;
-
-	p = pcap_create(ifname, errbuf);
-	if (p == NULL)
-		goto out;
-
-	pcap_set_snaplen(p, PCAP_MRU);
-	pcap_set_promisc(p, rx);
-	pcap_set_timeout(p, PCAP_TIMEOUT);
-#ifdef HAS_PROTO_EXTENSION
-	pcap_set_protocol(p, (rx ? htons(ETH_P_IP) : 0));
-#endif
-	pcap_set_buffer_size(p, (rx ? 10 : 1) * PCAP_MRU);
-	pcap_activate(p);
-	set_recv_type(p, rx);
-out:
-	return p;
-}
-
-static void
-get_random_bytes(void *ptr, int len)
-{
-	int fd;
-
-	fd = open("/dev/urandom", O_RDONLY);
-	if (fd < 0) {
-		perror("open");
-		exit(1);
-	}
-	read(fd, ptr, len);
-	close(fd);
-}
-
-static bool
-prepare_password(void)
-{
-	static char lbuf[1024];
-	unsigned char dig[SHA_DIGESTSIZE];
-	BigInteger x, v, n, g;
-	SHA1_CTX ctxt;
-	int ulen = strlen(username);
-	FILE *f;
-
-	lbuf[sizeof(lbuf) - 1] = 0;
-
-	f = fopen(passwd_file, "r");
-	if (!f)
-		return false;
-
-	while (fgets(lbuf, sizeof(lbuf) - 1, f) != NULL) {
-		char *str, *s2;
-
-		if (strncmp(lbuf, username, ulen) != 0)
-			continue;
-
-		if (lbuf[ulen] != ':')
-			continue;
-
-		str = &lbuf[ulen + 1];
-
-		if (strncmp(str, "$1$", 3) != 0)
-			continue;
-
-		s2 = strchr(str + 3, '$');
-		if (!s2)
-			continue;
-
-		if (s2 - str >= MAXSALTLEN)
-			continue;
-
-		strncpy((char *) pw_saltbuf, str, s2 - str);
-		pw_saltbuf[s2 - str] = 0;
-
-		s2 = strchr(s2, ':');
-		if (!s2)
-			continue;
-
-		*s2 = 0;
-		if (s2 - str >= MAXPARAMLEN)
-			continue;
-
-		strncpy((char *)password, str, MAXPARAMLEN);
-		fclose(f);
-		goto hash_password;
-	}
-
-	/* not found */
-	fclose(f);
-	return false;
-
-hash_password:
-	tce = gettcid(tpe.index);
-	do {
-		t_random(tpe.password.data, SALTLEN);
-	} while (memcmp(saltbuf, (char *)dig, sizeof(saltbuf)) == 0);
-	if (saltbuf[0] == 0)
-		saltbuf[0] = 0xff;
-
-	n = BigIntegerFromBytes(tce->modulus.data, tce->modulus.len);
-	g = BigIntegerFromBytes(tce->generator.data, tce->generator.len);
-	v = BigIntegerFromInt(0);
-
-	SHA1Init(&ctxt);
-	SHA1Update(&ctxt, (unsigned char *) username, strlen(username));
-	SHA1Update(&ctxt, (unsigned char *) ":", 1);
-	SHA1Update(&ctxt, (unsigned char *) password, strlen(password));
-	SHA1Final(dig, &ctxt);
-
-	SHA1Init(&ctxt);
-	SHA1Update(&ctxt, saltbuf, tpe.salt.len);
-	SHA1Update(&ctxt, dig, sizeof(dig));
-	SHA1Final(dig, &ctxt);
-
-	/* x = H(s, H(u, ':', p)) */
-	x = BigIntegerFromBytes(dig, sizeof(dig));
-
-	BigIntegerModExp(v, g, x, n);
-	tpe.password.len = BigIntegerToBytes(v, (unsigned char *)pwbuf);
-
-	BigIntegerFree(v);
-	BigIntegerFree(x);
-	BigIntegerFree(g);
-	BigIntegerFree(n);
-	return true;
-}
-
-static u16_t
-chksum(u16_t sum, const u8_t *data, u16_t len)
-{
-	u16_t t;
-	const u8_t *dataptr;
-	const u8_t *last_byte;
-
-	dataptr = data;
-	last_byte = data + len - 1;
-
-	while(dataptr < last_byte) {	/* At least two more bytes */
-		t = (dataptr[0] << 8) + dataptr[1];
-		sum += t;
-		if(sum < t) {
-			sum++;		/* carry */
-		}
-		dataptr += 2;
-	}
-
-	if(dataptr == last_byte) {
-		t = (dataptr[0] << 8) + 0;
-		sum += t;
-		if(sum < t) {
-			sum++;		/* carry */
-		}
-	}
-
-	/* Return sum in host byte order. */
-	return sum;
-}
-
-static void
-ead_send_packet_clone(struct ead_packet *pkt)
-{
-	u16_t len, sum;
-
-	memcpy(pktbuf, pkt, offsetof(struct ead_packet, msg));
-	memcpy(pktbuf->eh.ether_shost, ethmac, 6);
-	memcpy(pktbuf->eh.ether_dhost, pkt->eh.ether_shost, 6);
-
-	/* ip header */
-	len = sizeof(struct ead_packet) - sizeof(struct ether_header) + ntohl(pktbuf->msg.len);
-	pktbuf->len[0] = len >> 8;
-	pktbuf->len[1] = len & 0xff;
-	memcpy(pktbuf->srcipaddr, &pkt->msg.ip, 4);
-	memcpy(pktbuf->destipaddr, pkt->srcipaddr, 4);
-
-	/* ip checksum */
-	pktbuf->ipchksum = 0;
-	sum = chksum(0, (void *) &pktbuf->vhl, UIP_IPH_LEN);
-	if (sum == 0)
-		sum = 0xffff;
-	pktbuf->ipchksum = htons(~sum);
-
-	/* udp header */
-	pktbuf->srcport = pkt->destport;
-	pktbuf->destport = pkt->srcport;
-
-	/* udp checksum */
-	len -= UIP_IPH_LEN;
-	pktbuf->udplen = htons(len);
-	pktbuf->udpchksum = 0;
-	sum = len + UIP_PROTO_UDP;
-	sum = chksum(sum, (void *) &pktbuf->srcipaddr[0], 8); /* src, dest ip */
-	sum = chksum(sum, (void *) &pktbuf->srcport, len);
-	if (sum == 0)
-		sum = 0xffff;
-	pktbuf->udpchksum = htons(~sum);
-	pcap_sendpacket(pcap_fp, (void *) pktbuf, sizeof(struct ead_packet) + ntohl(pktbuf->msg.len));
-}
-
-static void
-set_state(int nstate)
-{
-	if (state == nstate)
-		return;
-
-	if (nstate < state) {
-		if ((nstate < EAD_TYPE_GET_PRIME) &&
-			(state >= EAD_TYPE_GET_PRIME)) {
-			t_serverclose(ts);
-			ts = NULL;
-		}
-		goto done;
-	}
-
-	switch(state) {
-	case EAD_TYPE_SET_USERNAME:
-		if (!prepare_password())
-			goto error;
-		ts = t_serveropenraw(&tpe, tce);
-		if (!ts)
-			goto error;
-		break;
-	case EAD_TYPE_GET_PRIME:
-		B = t_servergenexp(ts);
-		break;
-	case EAD_TYPE_SEND_A:
-		skey = t_servergetkey(ts, &A);
-		if (!skey)
-			goto error;
-
-		ead_set_key(skey);
-		break;
-	}
-done:
-	state = nstate;
-error:
-	return;
-}
-
-static bool
-handle_ping(struct ead_packet *pkt, int len, int *nstate)
-{
-	struct ead_msg *msg = &pktbuf->msg;
-	struct ead_msg_pong *pong = EAD_DATA(msg, pong);
-	int slen;
-
-	slen = strlen(dev_name);
-	if (slen > 1024)
-		slen = 1024;
-
-	msg->len = htonl(sizeof(struct ead_msg_pong) + slen);
-	strncpy(pong->name, dev_name, slen);
-	pong->name[slen] = 0;
-	pong->auth_type = htons(EAD_AUTH_MD5);
-
-	return true;
-}
-
-static bool
-handle_set_username(struct ead_packet *pkt, int len, int *nstate)
-{
-	struct ead_msg *msg = &pkt->msg;
-	struct ead_msg_user *user = EAD_DATA(msg, user);
-
-	set_state(EAD_TYPE_SET_USERNAME); /* clear old state */
-	strncpy(username, user->username, sizeof(username));
-	username[sizeof(username) - 1] = 0;
-
-	msg = &pktbuf->msg;
-	msg->len = 0;
-
-	*nstate = EAD_TYPE_GET_PRIME;
-	return true;
-}
-
-static bool
-handle_get_prime(struct ead_packet *pkt, int len, int *nstate)
-{
-	struct ead_msg *msg = &pktbuf->msg;
-	struct ead_msg_salt *salt = EAD_DATA(msg, salt);
-
-	msg->len = htonl(sizeof(struct ead_msg_salt));
-	salt->prime = tce->index - 1;
-	salt->len = ts->s.len;
-	memcpy(salt->salt, ts->s.data, ts->s.len);
-	memcpy(salt->ext_salt, pw_saltbuf, MAXSALTLEN);
-
-	*nstate = EAD_TYPE_SEND_A;
-	return true;
-}
-
-static bool
-handle_send_a(struct ead_packet *pkt, int len, int *nstate)
-{
-	struct ead_msg *msg = &pkt->msg;
-	struct ead_msg_number *number = EAD_DATA(msg, number);
-	len = ntohl(msg->len) - sizeof(struct ead_msg_number);
-
-	if (len > MAXPARAMLEN + 1)
-		return false;
-
-	A.len = len;
-	A.data = abuf;
-	memcpy(A.data, number->data, len);
-
-	msg = &pktbuf->msg;
-	number = EAD_DATA(msg, number);
-	msg->len = htonl(sizeof(struct ead_msg_number) + B->len);
-	memcpy(number->data, B->data, B->len);
-
-	*nstate = EAD_TYPE_SEND_AUTH;
-	return true;
-}
-
-static bool
-handle_send_auth(struct ead_packet *pkt, int len, int *nstate)
-{
-	struct ead_msg *msg = &pkt->msg;
-	struct ead_msg_auth *auth = EAD_DATA(msg, auth);
-
-	if (t_serververify(ts, auth->data) != 0) {
-		DEBUG(2, "Client authentication failed\n");
-		*nstate = EAD_TYPE_SET_USERNAME;
-		return false;
-	}
-
-	msg = &pktbuf->msg;
-	auth = EAD_DATA(msg, auth);
-	msg->len = htonl(sizeof(struct ead_msg_auth));
-
-	DEBUG(2, "Client authentication successful\n");
-	memcpy(auth->data, t_serverresponse(ts), sizeof(auth->data));
-
-	*nstate = EAD_TYPE_SEND_CMD;
-	return true;
-}
-
-static bool
-handle_send_cmd(struct ead_packet *pkt, int len, int *nstate)
-{
-	struct ead_msg *msg = &pkt->msg;
-	struct ead_msg_cmd *cmd = EAD_ENC_DATA(msg, cmd);
-	struct ead_msg_cmd_data *cmddata;
-	struct timeval tv, to, tn;
-	int pfd[2], fd;
-	fd_set fds;
-	pid_t pid;
-	bool stream = false;
-	int timeout;
-	int type;
-	int datalen;
-
-	datalen = ead_decrypt_message(msg) - sizeof(struct ead_msg_cmd);
-	if (datalen <= 0)
-		return false;
-
-	type = ntohs(cmd->type);
-	timeout = ntohs(cmd->timeout);
-
-	FD_ZERO(&fds);
-	cmd->data[datalen] = 0;
-	switch(type) {
-	case EAD_CMD_NORMAL:
-		if (pipe(pfd) < 0)
-			return false;
-
-		fcntl(pfd[0], F_SETFL, O_NONBLOCK | fcntl(pfd[0], F_GETFL));
-		child_pending = true;
-		pid = fork();
-		if (pid == 0) {
-			close(pfd[0]);
-			fd = open("/dev/null", O_RDWR);
-			if (fd > 0) {
-				dup2(fd, 0);
-				dup2(pfd[1], 1);
-				dup2(pfd[1], 2);
-			}
-			system((char *)cmd->data);
-			exit(0);
-		} else if (pid > 0) {
-			close(pfd[1]);
-			if (!timeout)
-				timeout = EAD_CMD_TIMEOUT;
-
-			stream = true;
-			break;
-		}
-		return false;
-	case EAD_CMD_BACKGROUND:
-		pid = fork();
-		if (pid == 0) {
-			/* close stdin, stdout, stderr, replace with fd to /dev/null */
-			fd = open("/dev/null", O_RDWR);
-			if (fd > 0) {
-				dup2(fd, 0);
-				dup2(fd, 1);
-				dup2(fd, 2);
-			}
-			system((char *)cmd->data);
-			exit(0);
-		} else if (pid > 0) {
-			break;
-		}
-		return false;
-	default:
-		return false;
-	}
-
-	msg = &pktbuf->msg;
-	cmddata = EAD_ENC_DATA(msg, cmd_data);
-
-	if (stream) {
-		int nfds, bytes;
-
-		/* send keepalive packets every 200 ms so that the client doesn't timeout */
-		gettimeofday(&to, NULL);
-		memcpy(&tn, &to, sizeof(tn));
-		tv.tv_usec = PCAP_TIMEOUT * 1000;
-		tv.tv_sec = 0;
-		do {
-			cmddata->done = 0;
-			FD_SET(pfd[0], &fds);
-			nfds = select(pfd[0] + 1, &fds, NULL, NULL, &tv);
-			bytes = 0;
-			if (nfds > 0) {
-				bytes = read(pfd[0], cmddata->data, 1024);
-				if (bytes < 0)
-					bytes = 0;
-			}
-			if (!bytes && !child_pending)
-				break;
-			DEBUG(3, "Sending %d bytes of console data, type=%d, timeout=%d\n", bytes, ntohl(msg->type), timeout);
-			ead_encrypt_message(msg, sizeof(struct ead_msg_cmd_data) + bytes);
-			ead_send_packet_clone(pkt);
-			gettimeofday(&tn, NULL);
-		} while (tn.tv_sec < to.tv_sec + timeout);
-		if (child_pending) {
-			kill(pid, SIGKILL);
-			return false;
-		}
-	}
-	cmddata->done = 1;
-	ead_encrypt_message(msg, sizeof(struct ead_msg_cmd_data));
-
-	return true;
-}
-
-
-
-static void
-parse_message(struct ead_packet *pkt, int len)
-{
-	bool (*handler)(struct ead_packet *pkt, int len, int *nstate);
-	int min_len = sizeof(struct ead_packet);
-	int nstate = state;
-	int type = ntohl(pkt->msg.type);
-
-	if ((type >= EAD_TYPE_GET_PRIME) &&
-		(state != type))
-		return;
-
-	if ((type != EAD_TYPE_PING) &&
-		((ntohs(pkt->msg.sid) & EAD_INSTANCE_MASK) >>
-		 EAD_INSTANCE_SHIFT) != instance->id)
-		return;
-
-	switch(type) {
-	case EAD_TYPE_PING:
-		handler = handle_ping;
-		break;
-	case EAD_TYPE_SET_USERNAME:
-		handler = handle_set_username;
-		min_len += sizeof(struct ead_msg_user);
-		break;
-	case EAD_TYPE_GET_PRIME:
-		handler = handle_get_prime;
-		break;
-	case EAD_TYPE_SEND_A:
-		handler = handle_send_a;
-		min_len += sizeof(struct ead_msg_number);
-		break;
-	case EAD_TYPE_SEND_AUTH:
-		handler = handle_send_auth;
-		min_len += sizeof(struct ead_msg_auth);
-		break;
-	case EAD_TYPE_SEND_CMD:
-		handler = handle_send_cmd;
-		min_len += sizeof(struct ead_msg_cmd) + sizeof(struct ead_msg_encrypted);
-		break;
-	default:
-		return;
-	}
-
-	if (len < min_len) {
-		DEBUG(2, "discarding packet: message too small\n");
-		return;
-	}
-
-	pktbuf->msg.magic = htonl(EAD_MAGIC);
-	pktbuf->msg.type = htonl(type + 1);
-	pktbuf->msg.nid = htons(nid);
-	pktbuf->msg.sid = pkt->msg.sid;
-	pktbuf->msg.len = 0;
-
-	if (handler(pkt, len, &nstate)) {
-		DEBUG(2, "sending response to packet type %d: %d\n", type + 1, ntohl(pktbuf->msg.len));
-		/* format response packet */
-		ead_send_packet_clone(pkt);
-	}
-	set_state(nstate);
-}
-
-static void
-handle_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes)
-{
-	struct ead_packet *pkt = (struct ead_packet *) bytes;
-
-	if (h->len < sizeof(struct ead_packet))
-		return;
-
-	if (pkt->eh.ether_type != htons(ETHERTYPE_IP))
-		return;
-
-	if (memcmp(pkt->eh.ether_dhost, "\xff\xff\xff\xff\xff\xff", 6) != 0)
-		return;
-
-	if (pkt->proto != UIP_PROTO_UDP)
-		return;
-
-	if (pkt->destport != htons(EAD_PORT))
-		return;
-
-	if (pkt->msg.magic != htonl(EAD_MAGIC))
-		return;
-
-	if (h->len < sizeof(struct ead_packet) + ntohl(pkt->msg.len))
-		return;
-
-	if ((pkt->msg.nid != 0xffff) &&
-		(pkt->msg.nid != htons(nid)))
-		return;
-
-	parse_message(pkt, h->len);
-}
-
-static void
-ead_pcap_reopen(bool first)
-{
-	static char errbuf[PCAP_ERRBUF_SIZE] = "";
-
-	if (pcap_fp_rx && (pcap_fp_rx != pcap_fp))
-		pcap_close(pcap_fp_rx);
-
-	if (pcap_fp)
-		pcap_close(pcap_fp);
-
-	pcap_fp_rx = NULL;
-	do {
-#ifdef linux
-		if (instance->bridge[0]) {
-			pcap_fp_rx = ead_open_pcap(instance->bridge, errbuf, 1);
-			pcap_fp = ead_open_pcap(instance->ifname, errbuf, 0);
-		} else
-#endif
-		{
-			pcap_fp = ead_open_pcap(instance->ifname, errbuf, 1);
-		}
-
-		if (!pcap_fp_rx)
-			pcap_fp_rx = pcap_fp;
-		if (first && !pcap_fp) {
-			DEBUG(1, "WARNING: unable to open interface '%s'\n", instance->ifname);
-			first = false;
-		}
-		if (!pcap_fp)
-			sleep(1);
-	} while (!pcap_fp);
-	pcap_setfilter(pcap_fp_rx, &pktfilter);
-}
-
-
-static void
-ead_pktloop(void)
-{
-	while (1) {
-		if (pcap_dispatch(pcap_fp_rx, 1, handle_packet, NULL) < 0) {
-			ead_pcap_reopen(false);
-			continue;
-		}
-	}
-}
-
-
-static int
-usage(const char *prog)
-{
-	fprintf(stderr, "Usage: %s [<options>]\n"
-		"Options:\n"
-		"\t-B             Run in background mode\n"
-		"\t-d <device>    Set the device to listen on\n"
-		"\t-D <name>      Set the name of the device visible to clients\n"
-		"\t-p <file>      Set the password file for authenticating\n"
-		"\t-P <file>      Write a pidfile\n"
-		"\n", prog);
-	return -1;
-}
-
-static void
-server_handle_sigchld(int sig)
-{
-	struct ead_instance *in;
-	struct list_head *p;
-	int pid = 0;
-	wait(&pid);
-
-	list_for_each(p, &instances) {
-		in = list_entry(p, struct ead_instance, list);
-		if (pid != in->pid)
-			continue;
-
-		in->pid = 0;
-		break;
-	}
-}
-
-static void
-instance_handle_sigchld(int sig)
-{
-	int pid = 0;
-	wait(&pid);
-	child_pending = false;
-}
-
-static void
-start_server(struct ead_instance *i)
-{
-	if (!nonfork) {
-		i->pid = fork();
-		if (i->pid != 0) {
-			if (i->pid < 0)
-				i->pid = 0;
-			return;
-		}
-	}
-
-	instance = i;
-	signal(SIGCHLD, instance_handle_sigchld);
-	ead_pcap_reopen(true);
-	ead_pktloop();
-	pcap_close(pcap_fp);
-	if (pcap_fp_rx != pcap_fp)
-		pcap_close(pcap_fp_rx);
-
-	exit(0);
-}
-
-
-static void
-start_servers(bool restart)
-{
-	struct ead_instance *in;
-	struct list_head *p;
-
-	list_for_each(p, &instances) {
-		in = list_entry(p, struct ead_instance, list);
-		if (in->pid > 0)
-			continue;
-
-		sleep(1);
-		start_server(in);
-	}
-}
-
-static void
-stop_server(struct ead_instance *in, bool do_free)
-{
-	if (in->pid > 0)
-		kill(in->pid, SIGKILL);
-	in->pid = 0;
-	if (do_free) {
-		list_del(&in->list);
-		free(in);
-	}
-}
-
-static void
-server_handle_sigint(int sig)
-{
-	struct ead_instance *in;
-	struct list_head *p, *tmp;
-
-	list_for_each_safe(p, tmp, &instances) {
-		in = list_entry(p, struct ead_instance, list);
-		stop_server(in, true);
-	}
-	exit(1);
-}
-
-#ifdef linux
-static int
-check_bridge_port(const char *br, const char *port, void *arg)
-{
-	struct ead_instance *in;
-	struct list_head *p, *tmp;
-
-	list_for_each(p, &instances) {
-		in = list_entry(p, struct ead_instance, list);
-
-		if (strcmp(in->ifname, port) != 0)
-			continue;
-
-		in->br_check = true;
-		if (strcmp(in->bridge, br) == 0)
-			break;
-
-		strncpy(in->bridge, br, sizeof(in->bridge));
-		DEBUG(2, "assigning port %s to bridge %s\n", in->ifname, in->bridge);
-		stop_server(in, false);
-	}
-	return 0;
-}
-
-static int
-check_bridge(const char *name, void *arg)
-{
-	br_foreach_port(name, check_bridge_port, arg);
-	return 0;
-}
-#endif
-
-static void
-check_all_interfaces(void)
-{
-#ifdef linux
-	struct ead_instance *in;
-	struct list_head *p, *tmp;
-
-	br_foreach_bridge(check_bridge, NULL);
-
-	/* look for interfaces that are no longer part of a bridge */
-	list_for_each(p, &instances) {
-		in = list_entry(p, struct ead_instance, list);
-
-		if (in->br_check) {
-			in->br_check = false;
-		} else if (in->bridge[0]) {
-			DEBUG(2, "removing port %s from bridge %s\n", in->ifname, in->bridge);
-			in->bridge[0] = 0;
-			stop_server(in, false);
-		}
-	}
-#endif
-}
-
-
-int main(int argc, char **argv)
-{
-	struct ead_instance *in;
-	struct timeval tv;
-	const char *pidfile = NULL;
-	bool background = false;
-	int n_iface = 0;
-	int fd, ch;
-
-	if (argc == 1)
-		return usage(argv[0]);
-
-	INIT_LIST_HEAD(&instances);
-	while ((ch = getopt(argc, argv, "Bd:D:fhp:P:")) != -1) {
-		switch(ch) {
-		case 'B':
-			background = true;
-			break;
-		case 'f':
-			nonfork = true;
-			break;
-		case 'h':
-			return usage(argv[0]);
-		case 'd':
-			in = malloc(sizeof(struct ead_instance));
-			memset(in, 0, sizeof(struct ead_instance));
-			INIT_LIST_HEAD(&in->list);
-			strncpy(in->ifname, optarg, sizeof(in->ifname) - 1);
-			list_add(&in->list, &instances);
-			in->id = n_iface++;
-			break;
-		case 'D':
-			dev_name = optarg;
-			break;
-		case 'p':
-			passwd_file = optarg;
-			break;
-		case 'P':
-			pidfile = optarg;
-			break;
-		}
-	}
-	signal(SIGCHLD, server_handle_sigchld);
-	signal(SIGINT, server_handle_sigint);
-	signal(SIGTERM, server_handle_sigint);
-	signal(SIGKILL, server_handle_sigint);
-
-	if (!n_iface) {
-		fprintf(stderr, "Error: ead needs at least one interface\n");
-		return -1;
-	}
-
-	if (background) {
-		if (fork() > 0)
-			exit(0);
-
-		fd = open("/dev/null", O_RDWR);
-		dup2(fd, 0);
-		dup2(fd, 1);
-		dup2(fd, 2);
-	}
-
-	if (pidfile) {
-		char pid[8];
-		int len;
-
-		unlink(pidfile);
-		fd = open(pidfile, O_CREAT|O_WRONLY|O_EXCL, 0644);
-		if (fd > 0) {
-			len = sprintf(pid, "%d\n", getpid());
-			write(fd, pid, len);
-			close(fd);
-		}
-	}
-
-	/* randomize the mac address */
-	get_random_bytes(ethmac + 3, 3);
-	nid = *(((u16_t *) ethmac) + 2);
-
-	start_servers(false);
-#ifdef linux
-	br_init();
-#endif
-	tv.tv_sec = 1;
-	tv.tv_usec = 0;
-	while (1) {
-		check_all_interfaces();
-		start_servers(true);
-		sleep(1);
-	}
-#ifdef linux
-	br_shutdown();
-#endif
-
-	return 0;
-}