1148 lines
24 KiB
C
1148 lines
24 KiB
C
/*
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* Copyright (C) 1993-2000 by Darren Reed.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and due credit is given
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* to the original author and the contributors.
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*/
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#if !defined(lint)
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static const char sccsid[] = "@(#)ipmon.c 1.21 6/5/96 (C)1993-2000 Darren Reed";
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static const char rcsid[] = "@(#)$FreeBSD$";
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#endif
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#ifndef SOLARIS
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#define SOLARIS (defined(__SVR4) || defined(__svr4__)) && defined(sun)
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#if !defined(__SVR4) && !defined(__svr4__)
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# if (__FreeBSD_version >= 300000)
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# include <sys/dirent.h>
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# else
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# include <sys/dir.h>
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# endif
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#else
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# include <sys/filio.h>
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# include <sys/byteorder.h>
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#endif
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#include <strings.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <net/if.h>
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#include <netinet/ip.h>
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#include <netinet/tcp_fsm.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include <sys/uio.h>
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#ifndef linux
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# include <sys/protosw.h>
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# include <netinet/ip_var.h>
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#endif
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#include <netinet/tcp.h>
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#include <netinet/ip_icmp.h>
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#include <ctype.h>
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#include <syslog.h>
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#include "netinet/ip_compat.h"
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#include <netinet/tcpip.h>
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#include "netinet/ip_fil.h"
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#include "netinet/ip_proxy.h"
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#include "netinet/ip_nat.h"
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#include "netinet/ip_state.h"
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#if defined(sun) && !defined(SOLARIS2)
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#define STRERROR(x) sys_errlist[x]
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extern char *sys_errlist[];
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#else
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#define STRERROR(x) strerror(x)
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#endif
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struct flags {
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int value;
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char flag;
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};
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struct flags tcpfl[] = {
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{ TH_ACK, 'A' },
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{ TH_RST, 'R' },
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{ TH_SYN, 'S' },
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{ TH_FIN, 'F' },
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{ TH_URG, 'U' },
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{ TH_PUSH,'P' },
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{ 0, '\0' }
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};
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#if SOLARIS
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static char *pidfile = "/etc/opt/ipf/ipmon.pid";
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#else
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# if BSD >= 199306
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static char *pidfile = "/var/run/ipmon.pid";
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# else
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static char *pidfile = "/etc/ipmon.pid";
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# endif
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#endif
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static char line[2048];
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static int opts = 0;
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static FILE *newlog = NULL;
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static char *logfile = NULL;
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static int donehup = 0;
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static void usage __P((char *));
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static void handlehup __P((int));
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static void flushlogs __P((char *, FILE *));
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static void print_log __P((int, FILE *, char *, int));
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static void print_ipflog __P((FILE *, char *, int));
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static void print_natlog __P((FILE *, char *, int));
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static void print_statelog __P((FILE *, char *, int));
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static void dumphex __P((FILE *, u_char *, int));
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static int read_log __P((int, int *, char *, int));
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static void write_pid __P((char *));
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char *hostname __P((int, int, u_32_t *));
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char *portname __P((int, char *, u_int));
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int main __P((int, char *[]));
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static void logopts __P((int, char *));
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static void init_tabs __P((void));
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static char *getproto __P((u_int));
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static char **protocols = NULL;
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static char **udp_ports = NULL;
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static char **tcp_ports = NULL;
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#define OPT_SYSLOG 0x001
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#define OPT_RESOLVE 0x002
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#define OPT_HEXBODY 0x004
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#define OPT_VERBOSE 0x008
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#define OPT_HEXHDR 0x010
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#define OPT_TAIL 0x020
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#define OPT_NAT 0x080
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#define OPT_STATE 0x100
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#define OPT_FILTER 0x200
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#define OPT_PORTNUM 0x400
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#define OPT_LOGALL (OPT_NAT|OPT_STATE|OPT_FILTER)
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#define HOSTNAME_V4(a,b) hostname((a), 4, (u_32_t *)&(b))
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#ifndef LOGFAC
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#define LOGFAC LOG_LOCAL0
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#endif
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void handlehup(sig)
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int sig;
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{
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FILE *fp;
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signal(SIGHUP, handlehup);
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if (logfile && (fp = fopen(logfile, "a")))
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newlog = fp;
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init_tabs();
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donehup = 1;
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}
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static void init_tabs()
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{
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struct protoent *p;
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struct servent *s;
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char *name, **tab;
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int port;
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if (protocols != NULL) {
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free(protocols);
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protocols = NULL;
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}
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protocols = (char **)malloc(256 * sizeof(*protocols));
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if (protocols != NULL) {
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bzero((char *)protocols, 256 * sizeof(*protocols));
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setprotoent(1);
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while ((p = getprotoent()) != NULL)
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if (p->p_proto >= 0 && p->p_proto <= 255 &&
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p->p_name != NULL)
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protocols[p->p_proto] = strdup(p->p_name);
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endprotoent();
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}
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if (udp_ports != NULL) {
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free(udp_ports);
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udp_ports = NULL;
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}
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udp_ports = (char **)malloc(65536 * sizeof(*udp_ports));
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if (udp_ports != NULL)
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bzero((char *)udp_ports, 65536 * sizeof(*udp_ports));
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if (tcp_ports != NULL) {
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free(tcp_ports);
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tcp_ports = NULL;
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}
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tcp_ports = (char **)malloc(65536 * sizeof(*tcp_ports));
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if (tcp_ports != NULL)
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bzero((char *)tcp_ports, 65536 * sizeof(*tcp_ports));
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setservent(1);
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while ((s = getservent()) != NULL) {
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if (s->s_proto == NULL)
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continue;
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else if (!strcmp(s->s_proto, "tcp")) {
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port = ntohs(s->s_port);
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name = s->s_name;
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tab = tcp_ports;
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} else if (!strcmp(s->s_proto, "udp")) {
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port = ntohs(s->s_port);
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name = s->s_name;
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tab = udp_ports;
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} else
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continue;
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if ((port < 0 || port > 65535) || (name == NULL))
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continue;
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tab[port] = strdup(name);
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}
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endservent();
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}
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static char *getproto(p)
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u_int p;
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{
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static char pnum[4];
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char *s;
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p &= 0xff;
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s = protocols ? protocols[p] : NULL;
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if (s == NULL) {
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sprintf(pnum, "%u", p);
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s = pnum;
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}
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return s;
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}
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static int read_log(fd, lenp, buf, bufsize)
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int fd, bufsize, *lenp;
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char *buf;
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{
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int nr;
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nr = read(fd, buf, bufsize);
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if (!nr)
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return 2;
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if ((nr < 0) && (errno != EINTR))
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return -1;
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*lenp = nr;
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return 0;
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}
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char *hostname(res, v, ip)
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int res, v;
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u_32_t *ip;
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{
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#ifdef USE_INET6
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static char hostbuf[MAXHOSTNAMELEN+1];
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#endif
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struct hostent *hp;
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struct in_addr ipa;
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if (v == 4) {
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ipa.s_addr = *ip;
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if (!res)
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return inet_ntoa(ipa);
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hp = gethostbyaddr((char *)ip, sizeof(ip), AF_INET);
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if (!hp)
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return inet_ntoa(ipa);
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return hp->h_name;
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}
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#ifdef USE_INET6
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(void) inet_ntop(AF_INET6, ip, hostbuf, sizeof(hostbuf) - 1);
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hostbuf[MAXHOSTNAMELEN] = '\0';
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return hostbuf;
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#else
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return "IPv6";
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#endif
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}
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char *portname(res, proto, port)
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int res;
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char *proto;
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u_int port;
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{
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static char pname[8];
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char *s;
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port = ntohs(port);
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port &= 0xffff;
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(void) sprintf(pname, "%u", port);
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if (!res || (opts & OPT_PORTNUM))
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return pname;
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s = NULL;
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if (!strcmp(proto, "tcp"))
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s = tcp_ports[port];
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else if (!strcmp(proto, "udp"))
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s = udp_ports[port];
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if (s == NULL)
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s = pname;
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return s;
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}
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static void dumphex(log, buf, len)
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FILE *log;
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u_char *buf;
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int len;
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{
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char line[80];
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int i, j, k;
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u_char *s = buf, *t = (u_char *)line;
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for (i = len, j = 0; i; i--, j++, s++) {
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if (j && !(j & 0xf)) {
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*t++ = '\n';
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*t = '\0';
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if (!(opts & OPT_SYSLOG))
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fputs(line, log);
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else
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syslog(LOG_INFO, "%s", line);
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t = (u_char *)line;
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*t = '\0';
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}
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sprintf((char *)t, "%02x", *s & 0xff);
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t += 2;
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if (!((j + 1) & 0xf)) {
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s -= 15;
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sprintf((char *)t, " ");
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t += 8;
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for (k = 16; k; k--, s++)
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*t++ = (isprint(*s) ? *s : '.');
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s--;
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}
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if ((j + 1) & 0xf)
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*t++ = ' ';;
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}
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if (j & 0xf) {
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for (k = 16 - (j & 0xf); k; k--) {
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*t++ = ' ';
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*t++ = ' ';
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*t++ = ' ';
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}
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sprintf((char *)t, " ");
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t += 7;
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s -= j & 0xf;
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for (k = j & 0xf; k; k--, s++)
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*t++ = (isprint(*s) ? *s : '.');
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*t++ = '\n';
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*t = '\0';
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}
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if (!(opts & OPT_SYSLOG)) {
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fputs(line, log);
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fflush(log);
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} else
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syslog(LOG_INFO, "%s", line);
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}
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static void print_natlog(log, buf, blen)
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FILE *log;
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char *buf;
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int blen;
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{
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struct natlog *nl;
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iplog_t *ipl = (iplog_t *)buf;
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char *t = line;
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struct tm *tm;
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int res, i, len;
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char *proto;
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nl = (struct natlog *)((char *)ipl + sizeof(*ipl));
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res = (opts & OPT_RESOLVE) ? 1 : 0;
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tm = localtime((time_t *)&ipl->ipl_sec);
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len = sizeof(line);
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if (!(opts & OPT_SYSLOG)) {
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(void) strftime(t, len, "%d/%m/%Y ", tm);
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i = strlen(t);
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len -= i;
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t += i;
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}
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(void) strftime(t, len, "%T", tm);
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t += strlen(t);
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(void) sprintf(t, ".%-.6ld @%hd ", ipl->ipl_usec, nl->nl_rule + 1);
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t += strlen(t);
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if (nl->nl_type == NL_NEWMAP)
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strcpy(t, "NAT:MAP ");
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else if (nl->nl_type == NL_NEWRDR)
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strcpy(t, "NAT:RDR ");
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else if (nl->nl_type == NL_EXPIRE)
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strcpy(t, "NAT:EXPIRE ");
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else if (nl->nl_type == NL_NEWBIMAP)
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strcpy(t, "NAT:BIMAP ");
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else if (nl->nl_type == NL_NEWBLOCK)
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strcpy(t, "NAT:MAPBLOCK ");
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else
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sprintf(t, "Type: %d ", nl->nl_type);
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t += strlen(t);
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proto = getproto(nl->nl_p);
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(void) sprintf(t, "%s,%s <- -> ", HOSTNAME_V4(res, nl->nl_inip),
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portname(res, proto, (u_int)nl->nl_inport));
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t += strlen(t);
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(void) sprintf(t, "%s,%s ", HOSTNAME_V4(res, nl->nl_outip),
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portname(res, proto, (u_int)nl->nl_outport));
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t += strlen(t);
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(void) sprintf(t, "[%s,%s]", HOSTNAME_V4(res, nl->nl_origip),
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portname(res, proto, (u_int)nl->nl_origport));
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t += strlen(t);
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if (nl->nl_type == NL_EXPIRE) {
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#ifdef USE_QUAD_T
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(void) sprintf(t, " Pkts %qd Bytes %qd",
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(long long)nl->nl_pkts,
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(long long)nl->nl_bytes);
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#else
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(void) sprintf(t, " Pkts %ld Bytes %ld",
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nl->nl_pkts, nl->nl_bytes);
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#endif
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t += strlen(t);
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}
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*t++ = '\n';
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*t++ = '\0';
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if (opts & OPT_SYSLOG)
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syslog(LOG_INFO, "%s", line);
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else
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(void) fprintf(log, "%s", line);
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}
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static void print_statelog(log, buf, blen)
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FILE *log;
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char *buf;
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int blen;
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{
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struct ipslog *sl;
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iplog_t *ipl = (iplog_t *)buf;
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char *t = line, *proto;
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struct tm *tm;
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int res, i, len;
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sl = (struct ipslog *)((char *)ipl + sizeof(*ipl));
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res = (opts & OPT_RESOLVE) ? 1 : 0;
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tm = localtime((time_t *)&ipl->ipl_sec);
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len = sizeof(line);
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if (!(opts & OPT_SYSLOG)) {
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(void) strftime(t, len, "%d/%m/%Y ", tm);
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i = strlen(t);
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len -= i;
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t += i;
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}
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(void) strftime(t, len, "%T", tm);
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t += strlen(t);
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(void) sprintf(t, ".%-.6ld ", ipl->ipl_usec);
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t += strlen(t);
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if (sl->isl_type == ISL_NEW)
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strcpy(t, "STATE:NEW ");
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else if (sl->isl_type == ISL_EXPIRE) {
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if ((sl->isl_p == IPPROTO_TCP) &&
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(sl->isl_state[0] > TCPS_ESTABLISHED ||
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sl->isl_state[1] > TCPS_ESTABLISHED))
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strcpy(t, "STATE:CLOSE ");
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else
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strcpy(t, "STATE:EXPIRE ");
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} else if (sl->isl_type == ISL_FLUSH)
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strcpy(t, "STATE:FLUSH ");
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else if (sl->isl_type == ISL_REMOVE)
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strcpy(t, "STATE:REMOVE ");
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else
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sprintf(t, "Type: %d ", sl->isl_type);
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t += strlen(t);
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proto = getproto(sl->isl_p);
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if (sl->isl_p == IPPROTO_TCP || sl->isl_p == IPPROTO_UDP) {
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(void) sprintf(t, "%s,%s -> ",
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hostname(res, sl->isl_v, (u_32_t *)&sl->isl_src),
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portname(res, proto, (u_int)sl->isl_sport));
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t += strlen(t);
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(void) sprintf(t, "%s,%s PR %s",
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hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst),
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portname(res, proto, (u_int)sl->isl_dport), proto);
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} else if (sl->isl_p == IPPROTO_ICMP) {
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(void) sprintf(t, "%s -> ", hostname(res, sl->isl_v,
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(u_32_t *)&sl->isl_src));
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t += strlen(t);
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(void) sprintf(t, "%s PR icmp %d",
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hostname(res, sl->isl_v, (u_32_t *)&sl->isl_dst),
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sl->isl_itype);
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}
|
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t += strlen(t);
|
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if (sl->isl_type != ISL_NEW) {
|
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#ifdef USE_QUAD_T
|
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(void) sprintf(t, " Pkts %qd Bytes %qd",
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(long long)sl->isl_pkts,
|
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(long long)sl->isl_bytes);
|
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#else
|
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(void) sprintf(t, " Pkts %ld Bytes %ld",
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sl->isl_pkts, sl->isl_bytes);
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#endif
|
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t += strlen(t);
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}
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|
|
*t++ = '\n';
|
|
*t++ = '\0';
|
|
if (opts & OPT_SYSLOG)
|
|
syslog(LOG_INFO, "%s", line);
|
|
else
|
|
(void) fprintf(log, "%s", line);
|
|
}
|
|
|
|
|
|
static void print_log(logtype, log, buf, blen)
|
|
FILE *log;
|
|
char *buf;
|
|
int logtype, blen;
|
|
{
|
|
iplog_t *ipl;
|
|
char *bp = NULL, *bpo = NULL;
|
|
int psize;
|
|
|
|
while (blen > 0) {
|
|
ipl = (iplog_t *)buf;
|
|
if ((u_long)ipl & (sizeof(long)-1)) {
|
|
if (bp)
|
|
bpo = bp;
|
|
bp = (char *)malloc(blen);
|
|
bcopy((char *)ipl, bp, blen);
|
|
if (bpo) {
|
|
free(bpo);
|
|
bpo = NULL;
|
|
}
|
|
buf = bp;
|
|
continue;
|
|
}
|
|
if (ipl->ipl_magic != IPL_MAGIC) {
|
|
/* invalid data or out of sync */
|
|
break;
|
|
}
|
|
psize = ipl->ipl_dsize;
|
|
switch (logtype)
|
|
{
|
|
case IPL_LOGIPF :
|
|
print_ipflog(log, buf, psize);
|
|
break;
|
|
case IPL_LOGNAT :
|
|
print_natlog(log, buf, psize);
|
|
break;
|
|
case IPL_LOGSTATE :
|
|
print_statelog(log, buf, psize);
|
|
break;
|
|
}
|
|
|
|
blen -= psize;
|
|
buf += psize;
|
|
}
|
|
if (bp)
|
|
free(bp);
|
|
return;
|
|
}
|
|
|
|
|
|
static void print_ipflog(log, buf, blen)
|
|
FILE *log;
|
|
char *buf;
|
|
int blen;
|
|
{
|
|
tcphdr_t *tp;
|
|
struct icmp *ic;
|
|
struct icmp *icmp;
|
|
struct tm *tm;
|
|
char *t, *proto;
|
|
int i, v, lvl, res, len, off, plen, ipoff;
|
|
ip_t *ipc, *ip;
|
|
u_short hl, p;
|
|
ipflog_t *ipf;
|
|
iplog_t *ipl;
|
|
u_32_t *s, *d;
|
|
#ifdef USE_INET6
|
|
ip6_t *ip6;
|
|
#endif
|
|
|
|
ipl = (iplog_t *)buf;
|
|
ipf = (ipflog_t *)((char *)buf + sizeof(*ipl));
|
|
ip = (ip_t *)((char *)ipf + sizeof(*ipf));
|
|
v = ip->ip_v;
|
|
res = (opts & OPT_RESOLVE) ? 1 : 0;
|
|
t = line;
|
|
*t = '\0';
|
|
tm = localtime((time_t *)&ipl->ipl_sec);
|
|
#ifdef linux
|
|
if (v == 4)
|
|
ip->ip_len = ntohs(ip->ip_len);
|
|
#endif
|
|
|
|
len = sizeof(line);
|
|
if (!(opts & OPT_SYSLOG)) {
|
|
(void) strftime(t, len, "%d/%m/%Y ", tm);
|
|
i = strlen(t);
|
|
len -= i;
|
|
t += i;
|
|
}
|
|
(void) strftime(t, len, "%T", tm);
|
|
t += strlen(t);
|
|
(void) sprintf(t, ".%-.6ld ", ipl->ipl_usec);
|
|
t += strlen(t);
|
|
if (ipl->ipl_count > 1) {
|
|
(void) sprintf(t, "%dx ", ipl->ipl_count);
|
|
t += strlen(t);
|
|
}
|
|
#if (SOLARIS || \
|
|
(defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
|
|
(defined(OpenBSD) && (OpenBSD >= 199603))) || defined(linux)
|
|
len = (int)sizeof(ipf->fl_ifname);
|
|
(void) sprintf(t, "%*.*s", len, len, ipf->fl_ifname);
|
|
t += strlen(t);
|
|
# if SOLARIS
|
|
if (isalpha(*(t - 1)))
|
|
*t++ = '0' + ipf->fl_unit;
|
|
# endif
|
|
#else
|
|
for (len = 0; len < 3; len++)
|
|
if (ipf->fl_ifname[len] == '\0')
|
|
break;
|
|
if (ipf->fl_ifname[len])
|
|
len++;
|
|
(void) sprintf(t, "%*.*s%u", len, len, ipf->fl_ifname, ipf->fl_unit);
|
|
t += strlen(t);
|
|
#endif
|
|
(void) sprintf(t, " @%hu:%hu ", ipf->fl_group, ipf->fl_rule + 1);
|
|
t += strlen(t);
|
|
|
|
if (ipf->fl_flags & FF_SHORT) {
|
|
*t++ = 'S';
|
|
lvl = LOG_ERR;
|
|
} else if (ipf->fl_flags & FR_PASS) {
|
|
if (ipf->fl_flags & FR_LOGP)
|
|
*t++ = 'p';
|
|
else
|
|
*t++ = 'P';
|
|
lvl = LOG_NOTICE;
|
|
} else if (ipf->fl_flags & FR_BLOCK) {
|
|
if (ipf->fl_flags & FR_LOGB)
|
|
*t++ = 'b';
|
|
else
|
|
*t++ = 'B';
|
|
lvl = LOG_WARNING;
|
|
} else if (ipf->fl_flags & FF_LOGNOMATCH) {
|
|
*t++ = 'n';
|
|
lvl = LOG_NOTICE;
|
|
} else {
|
|
*t++ = 'L';
|
|
lvl = LOG_INFO;
|
|
}
|
|
if (ipf->fl_loglevel != 0xffff)
|
|
lvl = ipf->fl_loglevel;
|
|
*t++ = ' ';
|
|
*t = '\0';
|
|
|
|
if (v == 6) {
|
|
#ifdef USE_INET6
|
|
off = 0;
|
|
ipoff = 0;
|
|
hl = sizeof(ip6_t);
|
|
ip6 = (ip6_t *)ip;
|
|
p = (u_short)ip6->ip6_nxt;
|
|
s = (u_32_t *)&ip6->ip6_src;
|
|
d = (u_32_t *)&ip6->ip6_dst;
|
|
plen = ntohs(ip6->ip6_plen);
|
|
#else
|
|
sprintf(t, "ipv6");
|
|
goto printipflog;
|
|
#endif
|
|
} else if (v == 4) {
|
|
hl = (ip->ip_hl << 2);
|
|
ipoff = ip->ip_off;
|
|
off = ipoff & IP_OFFMASK;
|
|
p = (u_short)ip->ip_p;
|
|
s = (u_32_t *)&ip->ip_src;
|
|
d = (u_32_t *)&ip->ip_dst;
|
|
plen = ntohs(ip->ip_len);
|
|
} else {
|
|
goto printipflog;
|
|
}
|
|
proto = getproto(p);
|
|
|
|
if ((p == IPPROTO_TCP || p == IPPROTO_UDP) && !off) {
|
|
tp = (tcphdr_t *)((char *)ip + hl);
|
|
if (!(ipf->fl_flags & (FI_SHORT << 16))) {
|
|
(void) sprintf(t, "%s,%s -> ", hostname(res, v, s),
|
|
portname(res, proto, (u_int)tp->th_sport));
|
|
t += strlen(t);
|
|
(void) sprintf(t, "%s,%s PR %s len %hu %hu ",
|
|
hostname(res, v, d),
|
|
portname(res, proto, (u_int)tp->th_dport),
|
|
proto, hl, plen);
|
|
t += strlen(t);
|
|
|
|
if (p == IPPROTO_TCP) {
|
|
*t++ = '-';
|
|
for (i = 0; tcpfl[i].value; i++)
|
|
if (tp->th_flags & tcpfl[i].value)
|
|
*t++ = tcpfl[i].flag;
|
|
if (opts & OPT_VERBOSE) {
|
|
(void) sprintf(t, " %lu %lu %hu",
|
|
(u_long)(ntohl(tp->th_seq)),
|
|
(u_long)(ntohl(tp->th_ack)),
|
|
ntohs(tp->th_win));
|
|
t += strlen(t);
|
|
}
|
|
}
|
|
*t = '\0';
|
|
} else {
|
|
(void) sprintf(t, "%s -> ", hostname(res, v, s));
|
|
t += strlen(t);
|
|
(void) sprintf(t, "%s PR %s len %hu %hu",
|
|
hostname(res, v, d), proto, hl, plen);
|
|
}
|
|
} else if ((p == IPPROTO_ICMP) && !off && (v == 4)) {
|
|
ic = (struct icmp *)((char *)ip + hl);
|
|
(void) sprintf(t, "%s -> ", hostname(res, v, s));
|
|
t += strlen(t);
|
|
(void) sprintf(t, "%s PR icmp len %hu %hu icmp %d/%d",
|
|
hostname(res, v, d), hl, plen,
|
|
ic->icmp_type, ic->icmp_code);
|
|
if (ic->icmp_type == ICMP_UNREACH ||
|
|
ic->icmp_type == ICMP_SOURCEQUENCH ||
|
|
ic->icmp_type == ICMP_PARAMPROB ||
|
|
ic->icmp_type == ICMP_REDIRECT ||
|
|
ic->icmp_type == ICMP_TIMXCEED) {
|
|
ipc = &ic->icmp_ip;
|
|
i = ntohs(ipc->ip_len);
|
|
ipoff = ntohs(ipc->ip_off);
|
|
proto = getproto(ipc->ip_p);
|
|
|
|
if (!(ipoff & IP_OFFMASK) &&
|
|
((ipc->ip_p == IPPROTO_TCP) ||
|
|
(ipc->ip_p == IPPROTO_UDP))) {
|
|
tp = (tcphdr_t *)((char *)ipc + hl);
|
|
t += strlen(t);
|
|
(void) sprintf(t, " for %s,%s -",
|
|
HOSTNAME_V4(res, ipc->ip_src),
|
|
portname(res, proto,
|
|
(u_int)tp->th_sport));
|
|
t += strlen(t);
|
|
(void) sprintf(t, " %s,%s PR %s len %hu %hu",
|
|
HOSTNAME_V4(res, ipc->ip_dst),
|
|
portname(res, proto,
|
|
(u_int)tp->th_dport),
|
|
proto, ipc->ip_hl << 2, i);
|
|
} else if (!(ipoff & IP_OFFMASK) &&
|
|
(ipc->ip_p == IPPROTO_ICMP)) {
|
|
icmp = (icmphdr_t *)((char *)ipc + hl);
|
|
|
|
t += strlen(t);
|
|
(void) sprintf(t, " for %s -",
|
|
HOSTNAME_V4(res, ipc->ip_src));
|
|
t += strlen(t);
|
|
(void) sprintf(t,
|
|
" %s PR icmp len %hu %hu icmp %d/%d",
|
|
HOSTNAME_V4(res, ipc->ip_dst),
|
|
ipc->ip_hl << 2, i,
|
|
icmp->icmp_type, icmp->icmp_code);
|
|
|
|
} else {
|
|
t += strlen(t);
|
|
(void) sprintf(t, " for %s -",
|
|
HOSTNAME_V4(res, ipc->ip_src));
|
|
t += strlen(t);
|
|
(void) sprintf(t, " %s PR %s len %hu (%hu)",
|
|
HOSTNAME_V4(res, ipc->ip_dst), proto,
|
|
ipc->ip_hl << 2, i);
|
|
t += strlen(t);
|
|
if (ipoff & IP_OFFMASK) {
|
|
(void) sprintf(t, " frag %s%s%hu@%hu",
|
|
ipoff & IP_MF ? "+" : "",
|
|
ipoff & IP_DF ? "-" : "",
|
|
i - (ipc->ip_hl<<2),
|
|
(ipoff & IP_OFFMASK) << 3);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
(void) sprintf(t, "%s -> ", hostname(res, v, s));
|
|
t += strlen(t);
|
|
(void) sprintf(t, "%s PR %s len %hu (%hu)",
|
|
hostname(res, v, d), proto, hl, plen);
|
|
t += strlen(t);
|
|
if (off & IP_OFFMASK)
|
|
(void) sprintf(t, " frag %s%s%hu@%hu",
|
|
ipoff & IP_MF ? "+" : "",
|
|
ipoff & IP_DF ? "-" : "",
|
|
plen - hl, (off & IP_OFFMASK) << 3);
|
|
}
|
|
t += strlen(t);
|
|
|
|
if (ipf->fl_flags & FR_KEEPSTATE) {
|
|
(void) strcpy(t, " K-S");
|
|
t += strlen(t);
|
|
}
|
|
|
|
if (ipf->fl_flags & FR_KEEPFRAG) {
|
|
(void) strcpy(t, " K-F");
|
|
t += strlen(t);
|
|
}
|
|
|
|
if (ipf->fl_flags & FR_INQUE)
|
|
strcpy(t, " IN");
|
|
else if (ipf->fl_flags & FR_OUTQUE)
|
|
strcpy(t, " OUT");
|
|
t += strlen(t);
|
|
printipflog:
|
|
*t++ = '\n';
|
|
*t++ = '\0';
|
|
if (opts & OPT_SYSLOG)
|
|
syslog(lvl, "%s", line);
|
|
else
|
|
(void) fprintf(log, "%s", line);
|
|
if (opts & OPT_HEXHDR)
|
|
dumphex(log, (u_char *)buf, sizeof(iplog_t) + sizeof(*ipf));
|
|
if (opts & OPT_HEXBODY)
|
|
dumphex(log, (u_char *)ip, ipf->fl_plen + ipf->fl_hlen);
|
|
}
|
|
|
|
|
|
static void usage(prog)
|
|
char *prog;
|
|
{
|
|
fprintf(stderr, "%s: [-NFhstvxX] [-f <logfile>]\n", prog);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
static void write_pid(file)
|
|
char *file;
|
|
{
|
|
FILE *fp = NULL;
|
|
int fd;
|
|
|
|
if ((fd = open(file, O_CREAT|O_TRUNC|O_WRONLY, 0644)) >= 0)
|
|
fp = fdopen(fd, "w");
|
|
if (!fp) {
|
|
close(fd);
|
|
fprintf(stderr, "unable to open/create pid file: %s\n", file);
|
|
return;
|
|
}
|
|
fprintf(fp, "%d", getpid());
|
|
fclose(fp);
|
|
close(fd);
|
|
}
|
|
|
|
|
|
static void flushlogs(file, log)
|
|
char *file;
|
|
FILE *log;
|
|
{
|
|
int fd, flushed = 0;
|
|
|
|
if ((fd = open(file, O_RDWR)) == -1) {
|
|
(void) fprintf(stderr, "%s: open: %s\n", file,STRERROR(errno));
|
|
exit(-1);
|
|
}
|
|
|
|
if (ioctl(fd, SIOCIPFFB, &flushed) == 0) {
|
|
printf("%d bytes flushed from log buffer\n",
|
|
flushed);
|
|
fflush(stdout);
|
|
} else
|
|
perror("SIOCIPFFB");
|
|
(void) close(fd);
|
|
|
|
if (flushed) {
|
|
if (opts & OPT_SYSLOG)
|
|
syslog(LOG_INFO, "%d bytes flushed from log\n",
|
|
flushed);
|
|
else if (log != stdout)
|
|
fprintf(log, "%d bytes flushed from log\n", flushed);
|
|
}
|
|
}
|
|
|
|
|
|
static void logopts(turnon, options)
|
|
int turnon;
|
|
char *options;
|
|
{
|
|
int flags = 0;
|
|
char *s;
|
|
|
|
for (s = options; *s; s++)
|
|
{
|
|
switch (*s)
|
|
{
|
|
case 'N' :
|
|
flags |= OPT_NAT;
|
|
break;
|
|
case 'S' :
|
|
flags |= OPT_STATE;
|
|
break;
|
|
case 'I' :
|
|
flags |= OPT_FILTER;
|
|
break;
|
|
default :
|
|
fprintf(stderr, "Unknown log option %c\n", *s);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
if (turnon)
|
|
opts |= flags;
|
|
else
|
|
opts &= ~(flags);
|
|
}
|
|
|
|
|
|
int main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
struct stat sb;
|
|
FILE *log = stdout;
|
|
int fd[3], doread, n, i;
|
|
int tr, nr, regular[3], c;
|
|
int fdt[3], devices = 0, make_daemon = 0;
|
|
char buf[512], *iplfile[3], *s;
|
|
extern int optind;
|
|
extern char *optarg;
|
|
|
|
fd[0] = fd[1] = fd[2] = -1;
|
|
fdt[0] = fdt[1] = fdt[2] = -1;
|
|
iplfile[0] = IPL_NAME;
|
|
iplfile[1] = IPNAT_NAME;
|
|
iplfile[2] = IPSTATE_NAME;
|
|
|
|
while ((c = getopt(argc, argv, "?aDf:FhnN:o:O:pP:sS:tvxX")) != -1)
|
|
switch (c)
|
|
{
|
|
case 'a' :
|
|
opts |= OPT_LOGALL;
|
|
fdt[0] = IPL_LOGIPF;
|
|
fdt[1] = IPL_LOGNAT;
|
|
fdt[2] = IPL_LOGSTATE;
|
|
break;
|
|
case 'D' :
|
|
make_daemon = 1;
|
|
break;
|
|
case 'f' : case 'I' :
|
|
opts |= OPT_FILTER;
|
|
fdt[0] = IPL_LOGIPF;
|
|
iplfile[0] = optarg;
|
|
break;
|
|
case 'F' :
|
|
flushlogs(iplfile[0], log);
|
|
flushlogs(iplfile[1], log);
|
|
flushlogs(iplfile[2], log);
|
|
break;
|
|
case 'n' :
|
|
opts |= OPT_RESOLVE;
|
|
break;
|
|
case 'N' :
|
|
opts |= OPT_NAT;
|
|
fdt[1] = IPL_LOGNAT;
|
|
iplfile[1] = optarg;
|
|
break;
|
|
case 'o' : case 'O' :
|
|
logopts(c == 'o', optarg);
|
|
fdt[0] = fdt[1] = fdt[2] = -1;
|
|
if (opts & OPT_FILTER)
|
|
fdt[0] = IPL_LOGIPF;
|
|
if (opts & OPT_NAT)
|
|
fdt[1] = IPL_LOGNAT;
|
|
if (opts & OPT_STATE)
|
|
fdt[2] = IPL_LOGSTATE;
|
|
break;
|
|
case 'p' :
|
|
opts |= OPT_PORTNUM;
|
|
break;
|
|
case 'P' :
|
|
pidfile = optarg;
|
|
break;
|
|
case 's' :
|
|
s = strrchr(argv[0], '/');
|
|
if (s == NULL)
|
|
s = argv[0];
|
|
else
|
|
s++;
|
|
openlog(s, LOG_NDELAY|LOG_PID, LOGFAC);
|
|
s = NULL;
|
|
opts |= OPT_SYSLOG;
|
|
break;
|
|
case 'S' :
|
|
opts |= OPT_STATE;
|
|
fdt[2] = IPL_LOGSTATE;
|
|
iplfile[2] = optarg;
|
|
break;
|
|
case 't' :
|
|
opts |= OPT_TAIL;
|
|
break;
|
|
case 'v' :
|
|
opts |= OPT_VERBOSE;
|
|
break;
|
|
case 'x' :
|
|
opts |= OPT_HEXBODY;
|
|
break;
|
|
case 'X' :
|
|
opts |= OPT_HEXHDR;
|
|
break;
|
|
default :
|
|
case 'h' :
|
|
case '?' :
|
|
usage(argv[0]);
|
|
}
|
|
|
|
init_tabs();
|
|
|
|
/*
|
|
* Default action is to only open the filter log file.
|
|
*/
|
|
if ((fdt[0] == -1) && (fdt[1] == -1) && (fdt[2] == -1))
|
|
fdt[0] = IPL_LOGIPF;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
if (fdt[i] == -1)
|
|
continue;
|
|
if (!strcmp(iplfile[i], "-"))
|
|
fd[i] = 0;
|
|
else {
|
|
if ((fd[i] = open(iplfile[i], O_RDONLY)) == -1) {
|
|
(void) fprintf(stderr,
|
|
"%s: open: %s\n", iplfile[i],
|
|
STRERROR(errno));
|
|
exit(-1);
|
|
}
|
|
|
|
if (fstat(fd[i], &sb) == -1) {
|
|
(void) fprintf(stderr, "%d: fstat: %s\n",fd[i],
|
|
STRERROR(errno));
|
|
exit(-1);
|
|
}
|
|
if (!(regular[i] = !S_ISCHR(sb.st_mode)))
|
|
devices++;
|
|
}
|
|
}
|
|
|
|
if (!(opts & OPT_SYSLOG)) {
|
|
logfile = argv[optind];
|
|
log = logfile ? fopen(logfile, "a") : stdout;
|
|
if (log == NULL) {
|
|
|
|
(void) fprintf(stderr, "%s: fopen: %s\n", argv[optind],
|
|
STRERROR(errno));
|
|
exit(-1);
|
|
}
|
|
setvbuf(log, NULL, _IONBF, 0);
|
|
} else
|
|
log = NULL;
|
|
|
|
if (make_daemon && ((log != stdout) || (opts & OPT_SYSLOG))) {
|
|
if (fork() > 0)
|
|
exit(0);
|
|
write_pid(pidfile);
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
setsid();
|
|
} else
|
|
write_pid(pidfile);
|
|
|
|
signal(SIGHUP, handlehup);
|
|
|
|
for (doread = 1; doread; ) {
|
|
nr = 0;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
tr = 0;
|
|
if (fdt[i] == -1)
|
|
continue;
|
|
if (!regular[i]) {
|
|
if (ioctl(fd[i], FIONREAD, &tr) == -1) {
|
|
perror("ioctl(FIONREAD)");
|
|
exit(-1);
|
|
}
|
|
} else {
|
|
tr = (lseek(fd[i], 0, SEEK_CUR) < sb.st_size);
|
|
if (!tr && !(opts & OPT_TAIL))
|
|
doread = 0;
|
|
}
|
|
if (!tr)
|
|
continue;
|
|
nr += tr;
|
|
|
|
tr = read_log(fd[i], &n, buf, sizeof(buf));
|
|
if (donehup) {
|
|
donehup = 0;
|
|
if (newlog) {
|
|
fclose(log);
|
|
log = newlog;
|
|
newlog = NULL;
|
|
}
|
|
}
|
|
|
|
switch (tr)
|
|
{
|
|
case -1 :
|
|
if (opts & OPT_SYSLOG)
|
|
syslog(LOG_ERR, "read: %m\n");
|
|
else
|
|
perror("read");
|
|
doread = 0;
|
|
break;
|
|
case 1 :
|
|
if (opts & OPT_SYSLOG)
|
|
syslog(LOG_ERR, "aborting logging\n");
|
|
else
|
|
fprintf(log, "aborting logging\n");
|
|
doread = 0;
|
|
break;
|
|
case 2 :
|
|
break;
|
|
case 0 :
|
|
if (n > 0) {
|
|
print_log(fdt[i], log, buf, n);
|
|
if (!(opts & OPT_SYSLOG))
|
|
fflush(log);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!nr && ((opts & OPT_TAIL) || devices))
|
|
sleep(1);
|
|
}
|
|
exit(0);
|
|
/* NOTREACHED */
|
|
}
|