548 lines
13 KiB
C
548 lines
13 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini netstat implementation(s) for busybox
|
|
* based in part on the netstat implementation from net-tools.
|
|
*
|
|
* Copyright (C) 2001 by Bart Visscher <magick@linux-fan.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
#include <sys/stat.h>
|
|
#include <dirent.h>
|
|
#include <unistd.h>
|
|
#include "inet_common.h"
|
|
#include "busybox.h"
|
|
#include "pwd.h"
|
|
|
|
#ifdef CONFIG_ROUTE
|
|
extern void displayroutes(int noresolve, int netstatfmt);
|
|
#endif
|
|
|
|
#define NETSTAT_CONNECTED 0x01
|
|
#define NETSTAT_LISTENING 0x02
|
|
#define NETSTAT_NUMERIC 0x04
|
|
#define NETSTAT_TCP 0x10
|
|
#define NETSTAT_UDP 0x20
|
|
#define NETSTAT_RAW 0x40
|
|
#define NETSTAT_UNIX 0x80
|
|
|
|
static int flags = NETSTAT_CONNECTED |
|
|
NETSTAT_TCP | NETSTAT_UDP | NETSTAT_RAW | NETSTAT_UNIX;
|
|
|
|
#define PROGNAME_WIDTHs PROGNAME_WIDTH1(PROGNAME_WIDTH)
|
|
#define PROGNAME_WIDTH1(s) PROGNAME_WIDTH2(s)
|
|
#define PROGNAME_WIDTH2(s) #s
|
|
|
|
#define PRG_HASH_SIZE 211
|
|
|
|
enum {
|
|
TCP_ESTABLISHED = 1,
|
|
TCP_SYN_SENT,
|
|
TCP_SYN_RECV,
|
|
TCP_FIN_WAIT1,
|
|
TCP_FIN_WAIT2,
|
|
TCP_TIME_WAIT,
|
|
TCP_CLOSE,
|
|
TCP_CLOSE_WAIT,
|
|
TCP_LAST_ACK,
|
|
TCP_LISTEN,
|
|
TCP_CLOSING /* now a valid state */
|
|
};
|
|
|
|
static const char * const tcp_state[] =
|
|
{
|
|
"",
|
|
"ESTABLISHED",
|
|
"SYN_SENT",
|
|
"SYN_RECV",
|
|
"FIN_WAIT1",
|
|
"FIN_WAIT2",
|
|
"TIME_WAIT",
|
|
"CLOSE",
|
|
"CLOSE_WAIT",
|
|
"LAST_ACK",
|
|
"LISTEN",
|
|
"CLOSING"
|
|
};
|
|
|
|
typedef enum {
|
|
SS_FREE = 0, /* not allocated */
|
|
SS_UNCONNECTED, /* unconnected to any socket */
|
|
SS_CONNECTING, /* in process of connecting */
|
|
SS_CONNECTED, /* connected to socket */
|
|
SS_DISCONNECTING /* in process of disconnecting */
|
|
} socket_state;
|
|
|
|
#define SO_ACCEPTCON (1<<16) /* performed a listen */
|
|
#define SO_WAITDATA (1<<17) /* wait data to read */
|
|
#define SO_NOSPACE (1<<18) /* no space to write */
|
|
|
|
static char *itoa(unsigned int i)
|
|
{
|
|
/* 21 digits plus null terminator, good for 64-bit or smaller ints */
|
|
static char local[22];
|
|
char *p = &local[21];
|
|
*p-- = '\0';
|
|
do {
|
|
*p-- = '0' + i % 10;
|
|
i /= 10;
|
|
} while (i > 0);
|
|
return p + 1;
|
|
}
|
|
|
|
static char *get_sname(int port, const char *proto, int num)
|
|
{
|
|
char *str=itoa(ntohs(port));
|
|
if (num) {
|
|
} else {
|
|
struct servent *se=getservbyport(port,proto);
|
|
if (se)
|
|
str=se->s_name;
|
|
}
|
|
if (!port) {
|
|
str="*";
|
|
}
|
|
return str;
|
|
}
|
|
|
|
static void snprint_ip_port(char *ip_port, int size, struct sockaddr *addr, int port, char *proto, int numeric)
|
|
{
|
|
char *port_name;
|
|
|
|
INET_rresolve(ip_port, size, (struct sockaddr_in *)addr,
|
|
0x4000 | ((numeric&NETSTAT_NUMERIC) ? 0x0fff : 0),
|
|
0xffffffff);
|
|
port_name=get_sname(htons(port), proto, numeric);
|
|
if ((strlen(ip_port) + strlen(port_name)) > 22)
|
|
ip_port[22 - strlen(port_name)] = '\0';
|
|
ip_port+=strlen(ip_port);
|
|
strcat(ip_port, ":");
|
|
strcat(ip_port, port_name);
|
|
}
|
|
|
|
static void tcp_do_one(int lnr, const char *line)
|
|
{
|
|
char local_addr[64], rem_addr[64];
|
|
const char *state_str;
|
|
char more[512];
|
|
int num, local_port, rem_port, d, state, timer_run, uid, timeout;
|
|
struct sockaddr_in localaddr, remaddr;
|
|
unsigned long rxq, txq, time_len, retr, inode;
|
|
|
|
if (lnr == 0)
|
|
return;
|
|
|
|
more[0] = '\0';
|
|
num = sscanf(line,
|
|
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
|
|
&d, local_addr, &local_port,
|
|
rem_addr, &rem_port, &state,
|
|
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
|
|
|
|
if (strlen(local_addr) > 8) {
|
|
} else {
|
|
sscanf(local_addr, "%X",
|
|
&((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
|
|
sscanf(rem_addr, "%X",
|
|
&((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
|
|
((struct sockaddr *) &localaddr)->sa_family = AF_INET;
|
|
((struct sockaddr *) &remaddr)->sa_family = AF_INET;
|
|
}
|
|
|
|
if (num < 10) {
|
|
error_msg("warning, got bogus tcp line.");
|
|
return;
|
|
}
|
|
state_str = tcp_state[state];
|
|
if ((rem_port && (flags&NETSTAT_CONNECTED)) ||
|
|
(!rem_port && (flags&NETSTAT_LISTENING)))
|
|
{
|
|
snprint_ip_port(local_addr, sizeof(local_addr),
|
|
(struct sockaddr *) &localaddr, local_port,
|
|
"tcp", flags&NETSTAT_NUMERIC);
|
|
|
|
snprint_ip_port(rem_addr, sizeof(rem_addr),
|
|
(struct sockaddr *) &remaddr, rem_port,
|
|
"tcp", flags&NETSTAT_NUMERIC);
|
|
|
|
printf("tcp %6ld %6ld %-23s %-23s %-12s\n",
|
|
rxq, txq, local_addr, rem_addr, state_str);
|
|
|
|
}
|
|
}
|
|
|
|
static void udp_do_one(int lnr, const char *line)
|
|
{
|
|
char local_addr[64], rem_addr[64];
|
|
char *state_str, more[512];
|
|
int num, local_port, rem_port, d, state, timer_run, uid, timeout;
|
|
struct sockaddr_in localaddr, remaddr;
|
|
unsigned long rxq, txq, time_len, retr, inode;
|
|
|
|
if (lnr == 0)
|
|
return;
|
|
|
|
more[0] = '\0';
|
|
num = sscanf(line,
|
|
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
|
|
&d, local_addr, &local_port,
|
|
rem_addr, &rem_port, &state,
|
|
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
|
|
|
|
if (strlen(local_addr) > 8) {
|
|
} else {
|
|
sscanf(local_addr, "%X",
|
|
&((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
|
|
sscanf(rem_addr, "%X",
|
|
&((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
|
|
((struct sockaddr *) &localaddr)->sa_family = AF_INET;
|
|
((struct sockaddr *) &remaddr)->sa_family = AF_INET;
|
|
}
|
|
|
|
if (num < 10) {
|
|
error_msg("warning, got bogus udp line.");
|
|
return;
|
|
}
|
|
switch (state) {
|
|
case TCP_ESTABLISHED:
|
|
state_str = "ESTABLISHED";
|
|
break;
|
|
|
|
case TCP_CLOSE:
|
|
state_str = "";
|
|
break;
|
|
|
|
default:
|
|
state_str = "UNKNOWN";
|
|
break;
|
|
}
|
|
|
|
#define notnull(A) (A.sin_addr.s_addr)
|
|
if ((notnull(remaddr) && (flags&NETSTAT_CONNECTED)) ||
|
|
(!notnull(remaddr) && (flags&NETSTAT_LISTENING)))
|
|
{
|
|
snprint_ip_port(local_addr, sizeof(local_addr),
|
|
(struct sockaddr *) &localaddr, local_port,
|
|
"udp", flags&NETSTAT_NUMERIC);
|
|
|
|
snprint_ip_port(rem_addr, sizeof(rem_addr),
|
|
(struct sockaddr *) &remaddr, rem_port,
|
|
"udp", flags&NETSTAT_NUMERIC);
|
|
|
|
printf("udp %6ld %6ld %-23s %-23s %-12s\n",
|
|
rxq, txq, local_addr, rem_addr, state_str);
|
|
|
|
}
|
|
}
|
|
|
|
static void raw_do_one(int lnr, const char *line)
|
|
{
|
|
char local_addr[64], rem_addr[64];
|
|
char *state_str, more[512];
|
|
int num, local_port, rem_port, d, state, timer_run, uid, timeout;
|
|
struct sockaddr_in localaddr, remaddr;
|
|
unsigned long rxq, txq, time_len, retr, inode;
|
|
|
|
if (lnr == 0)
|
|
return;
|
|
|
|
more[0] = '\0';
|
|
num = sscanf(line,
|
|
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
|
|
&d, local_addr, &local_port,
|
|
rem_addr, &rem_port, &state,
|
|
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
|
|
|
|
if (strlen(local_addr) > 8) {
|
|
} else {
|
|
sscanf(local_addr, "%X",
|
|
&((struct sockaddr_in *) &localaddr)->sin_addr.s_addr);
|
|
sscanf(rem_addr, "%X",
|
|
&((struct sockaddr_in *) &remaddr)->sin_addr.s_addr);
|
|
((struct sockaddr *) &localaddr)->sa_family = AF_INET;
|
|
((struct sockaddr *) &remaddr)->sa_family = AF_INET;
|
|
}
|
|
|
|
if (num < 10) {
|
|
error_msg("warning, got bogus raw line.");
|
|
return;
|
|
}
|
|
state_str=itoa(state);
|
|
|
|
#define notnull(A) (A.sin_addr.s_addr)
|
|
if ((notnull(remaddr) && (flags&NETSTAT_CONNECTED)) ||
|
|
(!notnull(remaddr) && (flags&NETSTAT_LISTENING)))
|
|
{
|
|
snprint_ip_port(local_addr, sizeof(local_addr),
|
|
(struct sockaddr *) &localaddr, local_port,
|
|
"raw", flags&NETSTAT_NUMERIC);
|
|
|
|
snprint_ip_port(rem_addr, sizeof(rem_addr),
|
|
(struct sockaddr *) &remaddr, rem_port,
|
|
"raw", flags&NETSTAT_NUMERIC);
|
|
|
|
printf("raw %6ld %6ld %-23s %-23s %-12s\n",
|
|
rxq, txq, local_addr, rem_addr, state_str);
|
|
|
|
}
|
|
}
|
|
|
|
#define HAS_INODE 1
|
|
|
|
static void unix_do_one(int nr, const char *line)
|
|
{
|
|
static int has = 0;
|
|
char path[PATH_MAX], ss_flags[32];
|
|
char *ss_proto, *ss_state, *ss_type;
|
|
int num, state, type, inode;
|
|
void *d;
|
|
unsigned long refcnt, proto, unix_flags;
|
|
|
|
if (nr == 0) {
|
|
if (strstr(line, "Inode"))
|
|
has |= HAS_INODE;
|
|
return;
|
|
}
|
|
path[0] = '\0';
|
|
num = sscanf(line, "%p: %lX %lX %lX %X %X %d %s",
|
|
&d, &refcnt, &proto, &unix_flags, &type, &state, &inode, path);
|
|
if (num < 6) {
|
|
error_msg("warning, got bogus unix line.");
|
|
return;
|
|
}
|
|
if (!(has & HAS_INODE))
|
|
snprintf(path,sizeof(path),"%d",inode);
|
|
|
|
if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))!=(NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
|
|
if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
|
|
if (!(flags&NETSTAT_LISTENING))
|
|
return;
|
|
} else {
|
|
if (!(flags&NETSTAT_CONNECTED))
|
|
return;
|
|
}
|
|
}
|
|
|
|
switch (proto) {
|
|
case 0:
|
|
ss_proto = "unix";
|
|
break;
|
|
|
|
default:
|
|
ss_proto = "??";
|
|
}
|
|
|
|
switch (type) {
|
|
case SOCK_STREAM:
|
|
ss_type = "STREAM";
|
|
break;
|
|
|
|
case SOCK_DGRAM:
|
|
ss_type = "DGRAM";
|
|
break;
|
|
|
|
case SOCK_RAW:
|
|
ss_type = "RAW";
|
|
break;
|
|
|
|
case SOCK_RDM:
|
|
ss_type = "RDM";
|
|
break;
|
|
|
|
case SOCK_SEQPACKET:
|
|
ss_type = "SEQPACKET";
|
|
break;
|
|
|
|
default:
|
|
ss_type = "UNKNOWN";
|
|
}
|
|
|
|
switch (state) {
|
|
case SS_FREE:
|
|
ss_state = "FREE";
|
|
break;
|
|
|
|
case SS_UNCONNECTED:
|
|
/*
|
|
* Unconnected sockets may be listening
|
|
* for something.
|
|
*/
|
|
if (unix_flags & SO_ACCEPTCON) {
|
|
ss_state = "LISTENING";
|
|
} else {
|
|
ss_state = "";
|
|
}
|
|
break;
|
|
|
|
case SS_CONNECTING:
|
|
ss_state = "CONNECTING";
|
|
break;
|
|
|
|
case SS_CONNECTED:
|
|
ss_state = "CONNECTED";
|
|
break;
|
|
|
|
case SS_DISCONNECTING:
|
|
ss_state = "DISCONNECTING";
|
|
break;
|
|
|
|
default:
|
|
ss_state = "UNKNOWN";
|
|
}
|
|
|
|
strcpy(ss_flags, "[ ");
|
|
if (unix_flags & SO_ACCEPTCON)
|
|
strcat(ss_flags, "ACC ");
|
|
if (unix_flags & SO_WAITDATA)
|
|
strcat(ss_flags, "W ");
|
|
if (unix_flags & SO_NOSPACE)
|
|
strcat(ss_flags, "N ");
|
|
|
|
strcat(ss_flags, "]");
|
|
|
|
printf("%-5s %-6ld %-11s %-10s %-13s ",
|
|
ss_proto, refcnt, ss_flags, ss_type, ss_state);
|
|
if (has & HAS_INODE)
|
|
printf("%-6d ",inode);
|
|
else
|
|
printf("- ");
|
|
puts(path);
|
|
}
|
|
|
|
#define _PATH_PROCNET_UDP "/proc/net/udp"
|
|
#define _PATH_PROCNET_TCP "/proc/net/tcp"
|
|
#define _PATH_PROCNET_RAW "/proc/net/raw"
|
|
#define _PATH_PROCNET_UNIX "/proc/net/unix"
|
|
|
|
static void do_info(const char *file, const char *name, void (*proc)(int, const char *))
|
|
{
|
|
char buffer[8192];
|
|
int lnr = 0;
|
|
FILE *procinfo;
|
|
|
|
procinfo = fopen(file, "r");
|
|
if (procinfo == NULL) {
|
|
if (errno != ENOENT) {
|
|
perror(file);
|
|
} else {
|
|
error_msg("no support for `%s' on this system.", name);
|
|
}
|
|
} else {
|
|
do {
|
|
if (fgets(buffer, sizeof(buffer), procinfo))
|
|
(proc)(lnr++, buffer);
|
|
} while (!feof(procinfo));
|
|
fclose(procinfo);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Our main function.
|
|
*/
|
|
|
|
int netstat_main(int argc, char **argv)
|
|
{
|
|
int opt;
|
|
int new_flags=0;
|
|
int showroute = 0, extended = 0;
|
|
while ((opt = getopt(argc, argv, "laenrtuwx")) != -1)
|
|
switch (opt) {
|
|
case 'l':
|
|
flags &= ~NETSTAT_CONNECTED;
|
|
flags |= NETSTAT_LISTENING;
|
|
break;
|
|
case 'a':
|
|
flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED;
|
|
break;
|
|
case 'n':
|
|
flags |= NETSTAT_NUMERIC;
|
|
break;
|
|
case 'r':
|
|
showroute = 1;
|
|
break;
|
|
case 'e':
|
|
extended = 1;
|
|
break;
|
|
case 't':
|
|
new_flags |= NETSTAT_TCP;
|
|
break;
|
|
case 'u':
|
|
new_flags |= NETSTAT_UDP;
|
|
break;
|
|
case 'w':
|
|
new_flags |= NETSTAT_RAW;
|
|
break;
|
|
case 'x':
|
|
new_flags |= NETSTAT_UNIX;
|
|
break;
|
|
default:
|
|
show_usage();
|
|
}
|
|
if ( showroute ) {
|
|
#ifdef CONFIG_ROUTE
|
|
displayroutes ( flags & NETSTAT_NUMERIC, !extended );
|
|
return 0;
|
|
#else
|
|
error_msg_and_die( "-r (display routing table) is not compiled in." );
|
|
#endif
|
|
}
|
|
|
|
if (new_flags) {
|
|
flags &= ~(NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX);
|
|
flags |= new_flags;
|
|
}
|
|
if (flags&(NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) {
|
|
printf("Active Internet connections "); /* xxx */
|
|
|
|
if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED))
|
|
printf("(servers and established)");
|
|
else {
|
|
if (flags&NETSTAT_LISTENING)
|
|
printf("(only servers)");
|
|
else
|
|
printf("(w/o servers)");
|
|
}
|
|
printf("\nProto Recv-Q Send-Q Local Address Foreign Address State \n");
|
|
}
|
|
if (flags&NETSTAT_TCP)
|
|
do_info(_PATH_PROCNET_TCP,"AF INET (tcp)",tcp_do_one);
|
|
if (flags&NETSTAT_UDP)
|
|
do_info(_PATH_PROCNET_UDP,"AF INET (udp)",udp_do_one);
|
|
if (flags&NETSTAT_RAW)
|
|
do_info(_PATH_PROCNET_RAW,"AF INET (raw)",raw_do_one);
|
|
if (flags&NETSTAT_UNIX) {
|
|
printf("Active UNIX domain sockets ");
|
|
if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED))
|
|
printf("(servers and established)");
|
|
else {
|
|
if (flags&NETSTAT_LISTENING)
|
|
printf("(only servers)");
|
|
else
|
|
printf("(w/o servers)");
|
|
}
|
|
|
|
printf("\nProto RefCnt Flags Type State I-Node Path\n");
|
|
do_info(_PATH_PROCNET_UNIX,"AF UNIX",unix_do_one);
|
|
}
|
|
return 0;
|
|
}
|