ipfsync is a WIP sync daemon designed to be used in a failover scenario. It was removed by5ee61c7daa
. This commit restores its three files. ipfsync is in my work queue. MFC after: 10 days X-MFC with:5ee61c7daa
672 lines
12 KiB
C
672 lines
12 KiB
C
/*
|
|
* Copyright (C) 2012 by Darren Reed.
|
|
*
|
|
* See the IPFILTER.LICENCE file for details on licencing.
|
|
*/
|
|
#if !defined(lint)
|
|
static const char sccsid[] = "@(#)ip_fil.c 2.41 6/5/96 (C) 1993-2000 Darren Reed";
|
|
static const char rcsid[] = "@(#)$Id: ipfsyncd.c,v 1.1.2.2 2012/07/22 08:04:24 darren_r Exp $";
|
|
#endif
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/errno.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <net/if.h>
|
|
|
|
#include <arpa/inet.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <signal.h>
|
|
|
|
#include "ipf.h"
|
|
#include "opts.h"
|
|
|
|
|
|
#define R_IO_ERROR -1
|
|
#define R_OKAY 0
|
|
#define R_MORE 1
|
|
#define R_SKIP 2
|
|
#if defined(sun) && !defined(SOLARIS2)
|
|
# define STRERROR(x) sys_errlist[x]
|
|
extern char *sys_errlist[];
|
|
#else
|
|
# define STRERROR(x) strerror(x)
|
|
#endif
|
|
|
|
|
|
int main(int, char *[]);
|
|
void usage(char *);
|
|
void printsynchdr(synchdr_t *);
|
|
void printtable(int);
|
|
void printsmcproto(char *);
|
|
void printcommand(int);
|
|
int do_kbuff(int, char *, int *);
|
|
int do_packet(int, char *);
|
|
int buildsocket(char *, struct sockaddr_in *);
|
|
void do_io(void);
|
|
void handleterm(int);
|
|
|
|
int terminate = 0;
|
|
int igmpfd = -1;
|
|
int nfd = -1;
|
|
int lfd = -1;
|
|
int opts = 0;
|
|
|
|
void
|
|
usage(progname)
|
|
char *progname;
|
|
{
|
|
fprintf(stderr,
|
|
"Usage: %s [-d] [-p port] [-i address] -I <interface>\n",
|
|
progname);
|
|
}
|
|
|
|
void
|
|
handleterm(sig)
|
|
int sig;
|
|
{
|
|
terminate = sig;
|
|
}
|
|
|
|
|
|
/* should be large enough to hold header + any datatype */
|
|
#define BUFFERLEN 1400
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
struct sockaddr_in sin;
|
|
char *interface;
|
|
char *progname;
|
|
int opt, tries;
|
|
|
|
progname = strrchr(argv[0], '/');
|
|
if (progname) {
|
|
progname++;
|
|
} else {
|
|
progname = argv[0];
|
|
}
|
|
|
|
opts = 0;
|
|
tries = 0;
|
|
interface = NULL;
|
|
|
|
bzero((char *)&sin, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_port = htons(0xaf6c);
|
|
sin.sin_addr.s_addr = htonl(INADDR_UNSPEC_GROUP | 0x697066);
|
|
|
|
while ((opt = getopt(argc, argv, "di:I:p:")) != -1)
|
|
switch (opt)
|
|
{
|
|
case 'd' :
|
|
debuglevel++;
|
|
break;
|
|
case 'I' :
|
|
interface = optarg;
|
|
break;
|
|
case 'i' :
|
|
sin.sin_addr.s_addr = inet_addr(optarg);
|
|
break;
|
|
case 'p' :
|
|
sin.sin_port = htons(atoi(optarg));
|
|
break;
|
|
}
|
|
|
|
if (interface == NULL) {
|
|
usage(progname);
|
|
exit(1);
|
|
}
|
|
|
|
if (!debuglevel) {
|
|
|
|
#ifdef BSD
|
|
daemon(0, 0);
|
|
#else
|
|
int fd = open("/dev/null", O_RDWR);
|
|
|
|
switch (fork())
|
|
{
|
|
case 0 :
|
|
break;
|
|
|
|
case -1 :
|
|
fprintf(stderr, "%s: fork() failed: %s\n",
|
|
argv[0], STRERROR(errno));
|
|
exit(1);
|
|
/* NOTREACHED */
|
|
|
|
default :
|
|
exit(0);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
dup2(fd, 0);
|
|
dup2(fd, 1);
|
|
dup2(fd, 2);
|
|
close(fd);
|
|
|
|
setsid();
|
|
#endif
|
|
}
|
|
|
|
signal(SIGHUP, handleterm);
|
|
signal(SIGINT, handleterm);
|
|
signal(SIGTERM, handleterm);
|
|
|
|
openlog(progname, LOG_PID, LOG_SECURITY);
|
|
|
|
while (!terminate) {
|
|
if (lfd != -1) {
|
|
close(lfd);
|
|
lfd = -1;
|
|
}
|
|
if (nfd != -1) {
|
|
close(nfd);
|
|
nfd = -1;
|
|
}
|
|
if (igmpfd != -1) {
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
}
|
|
|
|
if (buildsocket(interface, &sin) == -1)
|
|
goto tryagain;
|
|
|
|
lfd = open(IPSYNC_NAME, O_RDWR);
|
|
if (lfd == -1) {
|
|
syslog(LOG_ERR, "open(%s):%m", IPSYNC_NAME);
|
|
debug(1, "open(%s): %s\n", IPSYNC_NAME,
|
|
STRERROR(errno));
|
|
goto tryagain;
|
|
}
|
|
|
|
tries = -1;
|
|
do_io();
|
|
tryagain:
|
|
tries++;
|
|
syslog(LOG_INFO, "retry in %d seconds", 1 << tries);
|
|
debug(1, "wait %d seconds\n", 1 << tries);
|
|
sleep(1 << tries);
|
|
}
|
|
|
|
|
|
/* terminate */
|
|
if (lfd != -1)
|
|
close(lfd);
|
|
if (nfd != -1)
|
|
close(nfd);
|
|
|
|
syslog(LOG_ERR, "signal %d received, exiting...", terminate);
|
|
debug(1, "signal %d received, exiting...", terminate);
|
|
|
|
exit(1);
|
|
}
|
|
|
|
|
|
void
|
|
do_io()
|
|
{
|
|
char nbuff[BUFFERLEN];
|
|
char buff[BUFFERLEN];
|
|
fd_set mrd, rd;
|
|
int maxfd;
|
|
int inbuf;
|
|
int n1;
|
|
int left;
|
|
|
|
FD_ZERO(&mrd);
|
|
FD_SET(lfd, &mrd);
|
|
FD_SET(nfd, &mrd);
|
|
maxfd = nfd;
|
|
if (lfd > maxfd)
|
|
maxfd = lfd;
|
|
debug(2, "nfd %d lfd %d maxfd %d\n", nfd, lfd, maxfd);
|
|
|
|
inbuf = 0;
|
|
/*
|
|
* A threaded approach to this loop would have one thread
|
|
* work on reading lfd (only) all the time and another thread
|
|
* working on reading nfd all the time.
|
|
*/
|
|
while (!terminate) {
|
|
int n;
|
|
|
|
rd = mrd;
|
|
|
|
n = select(maxfd + 1, &rd, NULL, NULL, NULL);
|
|
if (n < 0) {
|
|
switch (errno)
|
|
{
|
|
case EINTR :
|
|
continue;
|
|
default :
|
|
syslog(LOG_ERR, "select error: %m");
|
|
debug(1, "select error: %s\n", STRERROR(errno));
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (FD_ISSET(lfd, &rd)) {
|
|
n1 = read(lfd, buff+inbuf, BUFFERLEN-inbuf);
|
|
|
|
debug(3, "read(K):%d\n", n1);
|
|
|
|
if (n1 <= 0) {
|
|
syslog(LOG_ERR, "read error (k-header): %m");
|
|
debug(1, "read error (k-header): %s\n",
|
|
STRERROR(errno));
|
|
return;
|
|
}
|
|
|
|
left = 0;
|
|
|
|
switch (do_kbuff(n1, buff, &left))
|
|
{
|
|
case R_IO_ERROR :
|
|
return;
|
|
case R_MORE :
|
|
inbuf += left;
|
|
break;
|
|
default :
|
|
inbuf = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (FD_ISSET(nfd, &rd)) {
|
|
n1 = recv(nfd, nbuff, sizeof(nbuff), 0);
|
|
|
|
debug(3, "read(N):%d\n", n1);
|
|
|
|
if (n1 <= 0) {
|
|
syslog(LOG_ERR, "read error (n-header): %m");
|
|
debug(1, "read error (n-header): %s\n",
|
|
STRERROR(errno));
|
|
return;
|
|
}
|
|
|
|
switch (do_packet(n1, nbuff))
|
|
{
|
|
case R_IO_ERROR :
|
|
return;
|
|
default :
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
buildsocket(nicname, sinp)
|
|
char *nicname;
|
|
struct sockaddr_in *sinp;
|
|
{
|
|
struct sockaddr_in *reqip;
|
|
struct ifreq req;
|
|
char opt;
|
|
|
|
debug(2, "binding to %s:%s\n", nicname, inet_ntoa(sinp->sin_addr));
|
|
|
|
if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) {
|
|
struct in_addr addr;
|
|
struct ip_mreq mreq;
|
|
|
|
igmpfd = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP);
|
|
if (igmpfd == -1) {
|
|
syslog(LOG_ERR, "socket:%m");
|
|
debug(1, "socket:%s\n", STRERROR(errno));
|
|
return -1;
|
|
}
|
|
|
|
bzero((char *)&req, sizeof(req));
|
|
strncpy(req.ifr_name, nicname, sizeof(req.ifr_name));
|
|
req.ifr_name[sizeof(req.ifr_name) - 1] = '\0';
|
|
if (ioctl(igmpfd, SIOCGIFADDR, &req) == -1) {
|
|
syslog(LOG_ERR, "ioctl(SIOCGIFADDR):%m");
|
|
debug(1, "ioctl(SIOCGIFADDR):%s\n", STRERROR(errno));
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
return -1;
|
|
}
|
|
reqip = (struct sockaddr_in *)&req.ifr_addr;
|
|
|
|
addr = reqip->sin_addr;
|
|
if (setsockopt(igmpfd, IPPROTO_IP, IP_MULTICAST_IF,
|
|
(char *)&addr, sizeof(addr)) == -1) {
|
|
syslog(LOG_ERR, "setsockopt(IP_MULTICAST_IF(%s)):%m",
|
|
inet_ntoa(addr));
|
|
debug(1, "setsockopt(IP_MULTICAST_IF(%s)):%s\n",
|
|
inet_ntoa(addr), STRERROR(errno));
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
return -1;
|
|
}
|
|
|
|
opt = 0;
|
|
if (setsockopt(igmpfd, IPPROTO_IP, IP_MULTICAST_LOOP,
|
|
(char *)&opt, sizeof(opt)) == -1) {
|
|
syslog(LOG_ERR, "setsockopt(IP_MULTICAST_LOOP=0):%m");
|
|
debug(1, "setsockopt(IP_MULTICAST_LOOP=0):%s\n",
|
|
STRERROR(errno));
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
return -1;
|
|
}
|
|
|
|
opt = 63;
|
|
if (setsockopt(igmpfd, IPPROTO_IP, IP_MULTICAST_TTL,
|
|
(char *)&opt, sizeof(opt)) == -1) {
|
|
syslog(LOG_ERR, "setsockopt(IP_MULTICAST_TTL=%d):%m",
|
|
opt);
|
|
debug(1, "setsockopt(IP_MULTICAST_TTL=%d):%s\n", opt,
|
|
STRERROR(errno));
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
return -1;
|
|
}
|
|
|
|
mreq.imr_multiaddr.s_addr = sinp->sin_addr.s_addr;
|
|
mreq.imr_interface.s_addr = reqip->sin_addr.s_addr;
|
|
|
|
if (setsockopt(igmpfd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
|
|
(char *)&mreq, sizeof(mreq)) == -1) {
|
|
char buffer[80];
|
|
|
|
snprintf(buffer, sizeof(buffer), "%s,", inet_ntoa(sinp->sin_addr));
|
|
strcat(buffer, inet_ntoa(reqip->sin_addr));
|
|
|
|
syslog(LOG_ERR,
|
|
"setsockpt(IP_ADD_MEMBERSHIP,%s):%m", buffer);
|
|
debug(1, "setsockpt(IP_ADD_MEMBERSHIP,%s):%s\n",
|
|
buffer, STRERROR(errno));
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
return -1;
|
|
}
|
|
}
|
|
nfd = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (nfd == -1) {
|
|
syslog(LOG_ERR, "socket:%m");
|
|
if (igmpfd != -1) {
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
}
|
|
return -1;
|
|
}
|
|
bzero((char *)&req, sizeof(req));
|
|
strncpy(req.ifr_name, nicname, sizeof(req.ifr_name));
|
|
req.ifr_name[sizeof(req.ifr_name) - 1] = '\0';
|
|
if (ioctl(nfd, SIOCGIFADDR, &req) == -1) {
|
|
syslog(LOG_ERR, "ioctl(SIOCGIFADDR):%m");
|
|
debug(1, "ioctl(SIOCGIFADDR):%s\n", STRERROR(errno));
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
return -1;
|
|
}
|
|
|
|
if (bind(nfd, (struct sockaddr *)&req.ifr_addr,
|
|
sizeof(req.ifr_addr)) == -1) {
|
|
syslog(LOG_ERR, "bind:%m");
|
|
debug(1, "bind:%s\n", STRERROR(errno));
|
|
close(nfd);
|
|
if (igmpfd != -1) {
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
}
|
|
nfd = -1;
|
|
return -1;
|
|
}
|
|
|
|
if (connect(nfd, (struct sockaddr *)sinp, sizeof(*sinp)) == -1) {
|
|
syslog(LOG_ERR, "connect:%m");
|
|
debug(1, "connect:%s\n", STRERROR(errno));
|
|
close(nfd);
|
|
if (igmpfd != -1) {
|
|
close(igmpfd);
|
|
igmpfd = -1;
|
|
}
|
|
nfd = -1;
|
|
return -1;
|
|
}
|
|
syslog(LOG_INFO, "Sending data to %s", inet_ntoa(sinp->sin_addr));
|
|
debug(3, "Sending data to %s\n", inet_ntoa(sinp->sin_addr));
|
|
|
|
return nfd;
|
|
}
|
|
|
|
|
|
int
|
|
do_packet(pklen, buff)
|
|
int pklen;
|
|
char *buff;
|
|
{
|
|
synchdr_t *sh;
|
|
u_32_t magic;
|
|
int len;
|
|
int n2;
|
|
int n3;
|
|
|
|
while (pklen > 0) {
|
|
if (pklen < sizeof(*sh)) {
|
|
syslog(LOG_ERR, "packet length too short:%d", pklen);
|
|
debug(2, "packet length too short:%d\n", pklen);
|
|
return R_SKIP;
|
|
}
|
|
|
|
sh = (synchdr_t *)buff;
|
|
len = ntohl(sh->sm_len);
|
|
magic = ntohl(sh->sm_magic);
|
|
|
|
if (magic != SYNHDRMAGIC) {
|
|
syslog(LOG_ERR, "invalid header magic %x", magic);
|
|
debug(2, "invalid header magic %x\n", magic);
|
|
return R_SKIP;
|
|
}
|
|
|
|
if (pklen < len + sizeof(*sh)) {
|
|
syslog(LOG_ERR, "packet length too short:%d", pklen);
|
|
debug(2, "packet length too short:%d\n", pklen);
|
|
return R_SKIP;
|
|
}
|
|
|
|
if (debuglevel > 3) {
|
|
printsynchdr(sh);
|
|
printcommand(sh->sm_cmd);
|
|
printtable(sh->sm_table);
|
|
printsmcproto(buff);
|
|
}
|
|
|
|
n2 = sizeof(*sh) + len;
|
|
|
|
do {
|
|
n3 = write(lfd, buff, n2);
|
|
if (n3 <= 0) {
|
|
syslog(LOG_ERR, "write error: %m");
|
|
debug(1, "write error: %s\n", STRERROR(errno));
|
|
return R_IO_ERROR;
|
|
}
|
|
|
|
n2 -= n3;
|
|
buff += n3;
|
|
pklen -= n3;
|
|
} while (n3 != 0);
|
|
}
|
|
|
|
return R_OKAY;
|
|
}
|
|
|
|
|
|
|
|
int
|
|
do_kbuff(inbuf, buf, left)
|
|
int inbuf, *left;
|
|
char *buf;
|
|
{
|
|
synchdr_t *sh;
|
|
u_32_t magic;
|
|
int complete;
|
|
int sendlen;
|
|
int error;
|
|
int bytes;
|
|
int len;
|
|
int n2;
|
|
int n3;
|
|
|
|
sendlen = 0;
|
|
bytes = inbuf;
|
|
error = R_OKAY;
|
|
sh = (synchdr_t *)buf;
|
|
|
|
for (complete = 0; bytes > 0; complete++) {
|
|
len = ntohl(sh->sm_len);
|
|
magic = ntohl(sh->sm_magic);
|
|
|
|
if (magic != SYNHDRMAGIC) {
|
|
syslog(LOG_ERR,
|
|
"read invalid header magic 0x%x, flushing",
|
|
magic);
|
|
debug(2, "read invalid header magic 0x%x, flushing\n",
|
|
magic);
|
|
n2 = SMC_RLOG;
|
|
(void) ioctl(lfd, SIOCIPFFL, &n2);
|
|
break;
|
|
}
|
|
|
|
if (debuglevel > 3) {
|
|
printsynchdr(sh);
|
|
printcommand(sh->sm_cmd);
|
|
printtable(sh->sm_table);
|
|
putchar('\n');
|
|
}
|
|
|
|
if (bytes < sizeof(*sh) + len) {
|
|
debug(3, "Not enough bytes %d < %d\n", bytes,
|
|
sizeof(*sh) + len);
|
|
error = R_MORE;
|
|
break;
|
|
}
|
|
|
|
if (debuglevel > 3) {
|
|
printsmcproto(buf);
|
|
}
|
|
|
|
sendlen += len + sizeof(*sh);
|
|
sh = (synchdr_t *)(buf + sendlen);
|
|
bytes -= sendlen;
|
|
}
|
|
|
|
if (complete) {
|
|
n3 = send(nfd, buf, sendlen, 0);
|
|
if (n3 <= 0) {
|
|
syslog(LOG_ERR, "write error: %m");
|
|
debug(1, "write error: %s\n", STRERROR(errno));
|
|
return R_IO_ERROR;
|
|
}
|
|
debug(3, "send on %d len %d = %d\n", nfd, sendlen, n3);
|
|
error = R_OKAY;
|
|
}
|
|
|
|
/* move buffer to the front,we might need to make
|
|
* this more efficient, by using a rolling pointer
|
|
* over the buffer and only copying it, when
|
|
* we are reaching the end
|
|
*/
|
|
if (bytes > 0) {
|
|
bcopy(buf + bytes, buf, bytes);
|
|
error = R_MORE;
|
|
}
|
|
debug(4, "complete %d bytes %d error %d\n", complete, bytes, error);
|
|
|
|
*left = bytes;
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
void
|
|
printcommand(cmd)
|
|
int cmd;
|
|
{
|
|
|
|
switch (cmd)
|
|
{
|
|
case SMC_CREATE :
|
|
printf(" cmd:CREATE");
|
|
break;
|
|
case SMC_UPDATE :
|
|
printf(" cmd:UPDATE");
|
|
break;
|
|
default :
|
|
printf(" cmd:Unknown(%d)", cmd);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
printtable(table)
|
|
int table;
|
|
{
|
|
switch (table)
|
|
{
|
|
case SMC_NAT :
|
|
printf(" table:NAT");
|
|
break;
|
|
case SMC_STATE :
|
|
printf(" table:STATE");
|
|
break;
|
|
default :
|
|
printf(" table:Unknown(%d)", table);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
printsmcproto(buff)
|
|
char *buff;
|
|
{
|
|
syncupdent_t *su;
|
|
synchdr_t *sh;
|
|
|
|
sh = (synchdr_t *)buff;
|
|
|
|
if (sh->sm_cmd == SMC_CREATE) {
|
|
;
|
|
|
|
} else if (sh->sm_cmd == SMC_UPDATE) {
|
|
su = (syncupdent_t *)buff;
|
|
if (sh->sm_p == IPPROTO_TCP) {
|
|
printf(" TCP Update: age %lu state %d/%d\n",
|
|
su->sup_tcp.stu_age,
|
|
su->sup_tcp.stu_state[0],
|
|
su->sup_tcp.stu_state[1]);
|
|
}
|
|
} else {
|
|
printf("Unknown command\n");
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
printsynchdr(sh)
|
|
synchdr_t *sh;
|
|
{
|
|
|
|
printf("v:%d p:%d num:%d len:%d magic:%x", sh->sm_v, sh->sm_p,
|
|
ntohl(sh->sm_num), ntohl(sh->sm_len), ntohl(sh->sm_magic));
|
|
}
|