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netstat.c
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netstat.c
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/*
* netstat This file contains an implementation of the command
* that helps in debugging the networking modules.
*
* NET-TOOLS A collection of programs that form the base set of the
* NET-3 Networking Distribution for the LINUX operating
* system.
*
* Version: $Id: netstat.c,v 1.69 2010-03-05 15:35:02 ecki Exp $
*
* Authors: Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
* Phil Packer, <pep@wicked.demon.co.uk>
* Johannes Stille, <johannes@titan.os.open.de>
* Bernd Eckenfels, <net-tools@lina.inka.de>
* Phil Blundell <philb@gnu.org>
* Tuan Hoang <tqhoang@bigfoot.com>
*
* Tuned for NET3 by:
* Alan Cox, <A.Cox@swansea.ac.uk>
* Copyright (c) 1993 Fred Baumgarten
*
* Modified:
*
*960116 {1.01} Bernd Eckenfels: verbose, cleanups
*960204 {1.10} Bernd Eckenfels: aftrans, usage, new route_info,
* DLFT_AF
*960204 {1.11} Bernd Eckenfels: netlink support
*960204 {1.12} Bernd Eckenfels: route_init()
*960215 {1.13} Bernd Eckenfels: netlink_print honors HAVE_
*960217 {1.14} Bernd Eckenfels: masq_info from Jos Vos and
* ax25_info from Jonathan Naylor.
*960218 {1.15} Bernd Eckenfels: ipx_info rewritten, -e for tcp/ipx
*960220 {1.16} Bernd Eckenfels: minor output reformats, -a for -x
*960221 {1.17} Bernd Eckenfels: route_init->getroute_init
*960426 {1.18} Bernd Eckenfels: new RTACTION, SYM/NUM, FIB/CACHE
*960517 {1.19} Bernd Eckenfels: usage() spelling fix and --unix inode,
* ':' is part of sock_addr for --inet
*960822 {x.xx} Frank Strauss: INET6 support
*
*970406 {1.33} Philip Copeland Added snmp reporting support module -s
* code provided by Andi Kleen
* (relly needs to be kernel hooked but
* this will do in the meantime)
* minor header file misplacement tidy up.
*980815 {1.xx} Stephane Fillod: X.25 support
*980411 {1.34} Arnaldo Carvalho i18n: catgets -> gnu gettext, substitution
* of sprintf for snprintf
*10/1998 Andi Kleen Use new interface primitives.
*990101 {1.36} Bernd Eckenfels usage updated to include -s and -C -F,
* fixed netstat -rC output (lib/inet_gr.c)
* removed broken NETLINK Support
* fixed format for /proc/net/udp|tcp|raw
* added -w,-t,-u TcpExt support to -s
*990131 {1.37} Jan Kratochvil added -p for prg_cache() & friends
* Flames to <short@ucw.cz>.
* Tuan Hoang added IGMP support for IPv4 and IPv6
*
*990420 {1.38} Tuan Hoang removed a useless assignment from igmp_do_one()
*20010404 {1.39} Arnaldo Carvalho de Melo - use setlocale
*20081201 {1.42} Brian Micek added -L|--udplite options for RFC 3828
*20020722 {1.51} Thomas Preusser added SCTP over IPv4 support
*
* 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.
*
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <ctype.h>
#include <fcntl.h>
#include <netdb.h>
#include <paths.h>
#include <pwd.h>
#include <getopt.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <dirent.h>
#include "net-support.h"
#include "pathnames.h"
#include "version.h"
#include "config.h"
#include "intl.h"
#include "sockets.h"
#include "interface.h"
#include "util.h"
#include "proc.h"
#define PROGNAME_WIDTH 20
#if !defined(s6_addr32) && defined(in6a_words)
#define s6_addr32 in6a_words /* libinet6 */
#endif
/* prototypes for statistics.c */
void parsesnmp(int, int, int);
void inittab(void);
void parsesnmp6(int, int, int);
void inittab6(void);
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 */
#define DFLT_AF "inet"
#define FEATURE_NETSTAT
#include "lib/net-features.h"
char *Release = RELEASE, *Version = "netstat 1.42 (2001-04-15)", *Signature = "Fred Baumgarten, Alan Cox, Bernd Eckenfels, Phil Blundell, Tuan Hoang, Brian Micek and others";
#define E_READ -1
#define E_IOCTL -3
int flag_int = 0;
int flag_rou = 0;
int flag_mas = 0;
int flag_sta = 0;
int flag_all = 0;
int flag_lst = 0;
int flag_cnt = 0;
int flag_deb = 0;
int flag_not = 0;
int flag_cf = 0;
int flag_opt = 0;
int flag_raw = 0;
int flag_tcp = 0;
int flag_sctp= 0;
int flag_udp = 0;
int flag_udplite = 0;
int flag_igmp= 0;
int flag_rom = 0;
int flag_exp = 1;
int flag_wide= 0;
int flag_prg = 0;
int flag_arg = 0;
int flag_ver = 0;
FILE *procinfo;
#define INFO_GUTS1(file,name,proc,prot) \
procinfo = proc_fopen((file)); \
if (procinfo == NULL) { \
if (errno != ENOENT) { \
perror((file)); \
return -1; \
} \
if (flag_arg || flag_ver) \
ESYSNOT("netstat", (name)); \
if (flag_arg) \
rc = 1; \
} else { \
do { \
if (fgets(buffer, sizeof(buffer), procinfo)) \
(proc)(lnr++, buffer,prot); \
} while (!feof(procinfo)); \
fclose(procinfo); \
}
#if HAVE_AFINET6
#define INFO_GUTS2(file,proc,prot) \
lnr = 0; \
procinfo = proc_fopen((file)); \
if (procinfo != NULL) { \
do { \
if (fgets(buffer, sizeof(buffer), procinfo)) \
(proc)(lnr++, buffer,prot); \
} while (!feof(procinfo)); \
fclose(procinfo); \
}
#else
#define INFO_GUTS2(file,proc,prot)
#endif
#define INFO_GUTS3 \
return rc;
#define INFO_GUTS6(file,file6,name,proc,prot4,prot6) \
char buffer[8192]; \
int rc = 0; \
int lnr = 0; \
if (!flag_arg || flag_inet) { \
INFO_GUTS1(file,name,proc,prot4) \
} \
if (!flag_arg || flag_inet6) { \
INFO_GUTS2(file6,proc,prot6) \
} \
INFO_GUTS3
#define INFO_GUTS(file,name,proc,prot) \
char buffer[8192]; \
int rc = 0; \
int lnr = 0; \
INFO_GUTS1(file,name,proc,prot) \
INFO_GUTS3
#define PROGNAME_WIDTHs PROGNAME_WIDTH1(PROGNAME_WIDTH)
#define PROGNAME_WIDTH1(s) PROGNAME_WIDTH2(s)
#define PROGNAME_WIDTH2(s) #s
#define PRG_HASH_SIZE 211
static struct prg_node {
struct prg_node *next;
unsigned long inode;
char name[PROGNAME_WIDTH];
} *prg_hash[PRG_HASH_SIZE];
static char prg_cache_loaded = 0;
#define PRG_HASHIT(x) ((x) % PRG_HASH_SIZE)
#define PROGNAME_BANNER "PID/Program name"
#define print_progname_banner() do { if (flag_prg) printf(" %-" PROGNAME_WIDTHs "s",PROGNAME_BANNER); } while (0)
#define PRG_LOCAL_ADDRESS "local_address"
#define PRG_INODE "inode"
#define PRG_SOCKET_PFX "socket:["
#define PRG_SOCKET_PFXl (strlen(PRG_SOCKET_PFX))
#define PRG_SOCKET_PFX2 "[0000]:"
#define PRG_SOCKET_PFX2l (strlen(PRG_SOCKET_PFX2))
#ifndef LINE_MAX
#define LINE_MAX 4096
#endif
#define PATH_PROC "/proc"
#define PATH_FD_SUFF "fd"
#define PATH_FD_SUFFl strlen(PATH_FD_SUFF)
#define PATH_PROC_X_FD PATH_PROC "/%s/" PATH_FD_SUFF
#define PATH_CMDLINE "cmdline"
#define PATH_CMDLINEl strlen(PATH_CMDLINE)
static void prg_cache_add(unsigned long inode, char *name)
{
unsigned hi = PRG_HASHIT(inode);
struct prg_node **pnp,*pn;
prg_cache_loaded=2;
for (pnp=prg_hash+hi;(pn=*pnp);pnp=&pn->next) {
if (pn->inode==inode) {
/* Some warning should be appropriate here
as we got multiple processes for one i-node */
return;
}
}
if (!(*pnp=malloc(sizeof(**pnp))))
return;
pn=*pnp;
pn->next=NULL;
pn->inode=inode;
if (strlen(name)>sizeof(pn->name)-1)
name[sizeof(pn->name)-1]='\0';
strcpy(pn->name,name);
}
static const char *prg_cache_get(unsigned long inode)
{
unsigned hi=PRG_HASHIT(inode);
struct prg_node *pn;
for (pn=prg_hash[hi];pn;pn=pn->next)
if (pn->inode==inode) return(pn->name);
return("-");
}
static void prg_cache_clear(void)
{
struct prg_node **pnp,*pn;
if (prg_cache_loaded == 2)
for (pnp=prg_hash;pnp<prg_hash+PRG_HASH_SIZE;pnp++)
while ((pn=*pnp)) {
*pnp=pn->next;
free(pn);
}
prg_cache_loaded=0;
}
static void wait_continous(void)
{
fflush(stdout);
sleep(1);
}
static int extract_type_1_socket_inode(const char lname[], unsigned long * inode_p) {
/* If lname is of the form "socket:[12345]", extract the "12345"
as *inode_p. Otherwise, return -1 as *inode_p.
*/
if (strlen(lname) < PRG_SOCKET_PFXl+3) return(-1);
if (memcmp(lname, PRG_SOCKET_PFX, PRG_SOCKET_PFXl)) return(-1);
if (lname[strlen(lname)-1] != ']') return(-1);
{
char inode_str[strlen(lname + 1)]; /* e.g. "12345" */
const int inode_str_len = strlen(lname) - PRG_SOCKET_PFXl - 1;
char *serr;
strncpy(inode_str, lname+PRG_SOCKET_PFXl, inode_str_len);
inode_str[inode_str_len] = '\0';
*inode_p = strtol(inode_str,&serr,0);
if (!serr || *serr || *inode_p < 0 || *inode_p >= LONG_MAX)
return(-1);
}
return(0);
}
static int extract_type_2_socket_inode(const char lname[], unsigned long * inode_p) {
/* If lname is of the form "[0000]:12345", extract the "12345"
as *inode_p. Otherwise, return -1 as *inode_p.
*/
if (strlen(lname) < PRG_SOCKET_PFX2l+1) return(-1);
if (memcmp(lname, PRG_SOCKET_PFX2, PRG_SOCKET_PFX2l)) return(-1);
{
char *serr;
*inode_p=strtol(lname + PRG_SOCKET_PFX2l,&serr,0);
if (!serr || *serr || *inode_p < 0 || *inode_p >= LONG_MAX)
return(-1);
}
return(0);
}
static void prg_cache_load(void)
{
char line[LINE_MAX],eacces=0;
int procfdlen,fd,cmdllen,lnamelen;
char lname[30],cmdlbuf[512],finbuf[PROGNAME_WIDTH];
unsigned long inode;
const char *cs,*cmdlp;
DIR *dirproc=NULL,*dirfd=NULL;
struct dirent *direproc,*direfd;
if (prg_cache_loaded || !flag_prg) return;
prg_cache_loaded=1;
cmdlbuf[sizeof(cmdlbuf)-1]='\0';
if (!(dirproc=opendir(PATH_PROC))) goto fail;
while (errno=0,direproc=readdir(dirproc)) {
for (cs=direproc->d_name;*cs;cs++)
if (!isdigit(*cs))
break;
if (*cs)
continue;
procfdlen=snprintf(line,sizeof(line),PATH_PROC_X_FD,direproc->d_name);
if (procfdlen<=0 || procfdlen>=sizeof(line)-5)
continue;
errno=0;
dirfd=opendir(line);
if (! dirfd) {
if (errno==EACCES)
eacces=1;
continue;
}
line[procfdlen] = '/';
cmdlp = NULL;
while ((direfd = readdir(dirfd))) {
/* Skip . and .. */
if (!isdigit(direfd->d_name[0]))
continue;
if (procfdlen+1+strlen(direfd->d_name)+1>sizeof(line))
continue;
memcpy(line + procfdlen - PATH_FD_SUFFl, PATH_FD_SUFF "/",
PATH_FD_SUFFl+1);
strcpy(line + procfdlen + 1, direfd->d_name);
lnamelen=readlink(line,lname,sizeof(lname)-1);
lname[lnamelen] = '\0'; /*make it a null-terminated string*/
if (extract_type_1_socket_inode(lname, &inode) < 0)
if (extract_type_2_socket_inode(lname, &inode) < 0)
continue;
if (!cmdlp) {
if (procfdlen - PATH_FD_SUFFl + PATH_CMDLINEl >=
sizeof(line) - 5)
continue;
strcpy(line + procfdlen-PATH_FD_SUFFl, PATH_CMDLINE);
fd = open(line, O_RDONLY);
if (fd < 0)
continue;
cmdllen = read(fd, cmdlbuf, sizeof(cmdlbuf) - 1);
if (close(fd))
continue;
if (cmdllen == -1)
continue;
if (cmdllen < sizeof(cmdlbuf) - 1)
cmdlbuf[cmdllen]='\0';
if ((cmdlp = strrchr(cmdlbuf, '/')))
cmdlp++;
else
cmdlp = cmdlbuf;
}
snprintf(finbuf, sizeof(finbuf), "%s/%s", direproc->d_name, cmdlp);
prg_cache_add(inode, finbuf);
}
closedir(dirfd);
dirfd = NULL;
}
if (dirproc)
closedir(dirproc);
if (dirfd)
closedir(dirfd);
if (!eacces)
return;
if (prg_cache_loaded == 1) {
fail:
fprintf(stderr,_("(No info could be read for \"-p\": geteuid()=%d but you should be root.)\n"),
geteuid());
}
else
fprintf(stderr, _("(Not all processes could be identified, non-owned process info\n"
" will not be shown, you would have to be root to see it all.)\n"));
}
#if HAVE_AFNETROM
static const char *netrom_state[] =
{
N_("LISTENING"),
N_("CONN SENT"),
N_("DISC SENT"),
N_("ESTABLISHED")
};
static int netrom_info(void)
{
FILE *f;
char buffer[256], dev[16];
int st, vs, vr, sendq, recvq, ret;
f = proc_fopen(_PATH_PROCNET_NR);
if (f == NULL) {
if (errno != ENOENT) {
perror(_PATH_PROCNET_NR);
return (-1);
}
if (flag_arg || flag_ver)
ESYSNOT("netstat", "AF NETROM");
if (flag_arg)
return (1);
else
return (0);
}
printf(_("Active NET/ROM sockets\n"));
printf(_("User Dest Source Device State Vr/Vs Send-Q Recv-Q\n"));
fgets(buffer, 256, f);
while (fgets(buffer, 256, f)) {
buffer[9] = 0;
buffer[19] = 0;
buffer[29] = 0;
ret = sscanf(buffer + 30, "%s %*x/%*x %*x/%*x %d %d %d %*d %*d/%*d %*d/%*d %*d/%*d %*d/%*d %*d/%*d %*d %d %d %*d",
dev, &st, &vs, &vr, &sendq, &recvq);
if (ret != 6) {
printf(_("Problem reading data from %s\n"), _PATH_PROCNET_NR);
continue;
}
printf("%-9s %-9s %-9s %-6s %-11s %03d/%03d %-6d %-6d\n",
buffer, buffer + 10, buffer + 20,
dev,
_(netrom_state[st]),
vr, vs, sendq, recvq);
}
fclose(f);
return 0;
}
#endif
/* These enums are used by IPX too. :-( */
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 */
};
#if HAVE_AFINET || HAVE_AFINET6
static const char *tcp_state[] =
{
"",
N_("ESTABLISHED"),
N_("SYN_SENT"),
N_("SYN_RECV"),
N_("FIN_WAIT1"),
N_("FIN_WAIT2"),
N_("TIME_WAIT"),
N_("CLOSE"),
N_("CLOSE_WAIT"),
N_("LAST_ACK"),
N_("LISTEN"),
N_("CLOSING")
};
static void finish_this_one(int uid, unsigned long inode, const char *timers)
{
struct passwd *pw;
if (flag_exp > 1) {
if (!(flag_not & FLAG_NUM_USER) && ((pw = getpwuid(uid)) != NULL))
printf(" %-10s ", pw->pw_name);
else
printf(" %-10d ", uid);
printf("%-10lu",inode);
}
if (flag_prg)
printf(" %-" PROGNAME_WIDTHs "s",prg_cache_get(inode));
if (flag_opt)
printf(" %s", timers);
putchar('\n');
}
static void igmp_do_one(int lnr, const char *line,const char *prot)
{
char mcast_addr[128];
#if HAVE_AFINET6
struct sockaddr_in6 mcastaddr;
char addr6[INET6_ADDRSTRLEN];
struct in6_addr in6;
extern struct aftype inet6_aftype;
#else
struct sockaddr_in mcastaddr;
#endif
struct aftype *ap;
static int idx_flag = 0;
static int igmp6_flag = 0;
static char device[16];
int num, idx, refcnt;
if (lnr == 0) {
/* IPV6 ONLY */
/* igmp6 file does not have any comments on first line */
if ( strstr( line, "Device" ) == NULL ) {
igmp6_flag = 1;
} else {
/* IPV4 ONLY */
/* 2.1.x kernels and up have Idx field */
/* 2.0.x and below do not have Idx field */
if ( strncmp( line, "Idx", strlen("Idx") ) == 0 )
idx_flag = 1;
else
idx_flag = 0;
return;
}
}
if (igmp6_flag) { /* IPV6 */
#if HAVE_AFINET6
num = sscanf( line, "%d %15s %64[0-9A-Fa-f] %d", &idx, device, mcast_addr, &refcnt );
if (num == 4) {
/* Demangle what the kernel gives us */
sscanf(mcast_addr, "%08X%08X%08X%08X",
&in6.s6_addr32[0], &in6.s6_addr32[1],
&in6.s6_addr32[2], &in6.s6_addr32[3]);
in6.s6_addr32[0] = htonl(in6.s6_addr32[0]);
in6.s6_addr32[1] = htonl(in6.s6_addr32[1]);
in6.s6_addr32[2] = htonl(in6.s6_addr32[2]);
in6.s6_addr32[3] = htonl(in6.s6_addr32[3]);
inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
inet6_aftype.input(1, addr6, (struct sockaddr *) &mcastaddr);
mcastaddr.sin6_family = AF_INET6;
} else {
fprintf(stderr, _("warning, got bogus igmp6 line %d.\n"), lnr);
return;
}
if ((ap = get_afntype(((struct sockaddr *) &mcastaddr)->sa_family)) == NULL) {
fprintf(stderr, _("netstat: unsupported address family %d !\n"),
((struct sockaddr *) &mcastaddr)->sa_family);
return;
}
safe_strncpy(mcast_addr, ap->sprint((struct sockaddr *) &mcastaddr,
flag_not), sizeof(mcast_addr));
printf("%-15s %-6d %s\n", device, refcnt, mcast_addr);
#endif
} else { /* IPV4 */
#if HAVE_AFINET
if (line[0] != '\t') {
if (idx_flag) {
if ((num = sscanf( line, "%d\t%10c", &idx, device)) < 2) {
fprintf(stderr, _("warning, got bogus igmp line %d.\n"), lnr);
return;
}
} else {
if ( (num = sscanf( line, "%10c", device )) < 1 ) {
fprintf(stderr, _("warning, got bogus igmp line %d.\n"), lnr);
return;
}
}
device[10] = '\0';
return;
} else if ( line[0] == '\t' ) {
if ( (num = sscanf(line, "\t%8[0-9A-Fa-f] %d", mcast_addr, &refcnt)) < 2 ) {
fprintf(stderr, _("warning, got bogus igmp line %d.\n"), lnr);
return;
}
sscanf( mcast_addr, "%X",
&((struct sockaddr_in *) &mcastaddr)->sin_addr.s_addr );
((struct sockaddr *) &mcastaddr)->sa_family = AF_INET;
} else {
fprintf(stderr, _("warning, got bogus igmp line %d.\n"), lnr);
return;
}
if ((ap = get_afntype(((struct sockaddr *) &mcastaddr)->sa_family)) == NULL) {
fprintf(stderr, _("netstat: unsupported address family %d !\n"),
((struct sockaddr *) &mcastaddr)->sa_family);
return;
}
safe_strncpy(mcast_addr, ap->sprint((struct sockaddr *) &mcastaddr,
flag_not), sizeof(mcast_addr));
printf("%-15s %-6d %s\n", device, refcnt, mcast_addr );
#endif
} /* IPV4 */
}
#if HAVE_AFX25
static int x25_info(void)
{
FILE *f=proc_fopen(_PATH_PROCNET_X25);
char buffer[256],dev[16];
int st,vs,vr,sendq,recvq,lci;
static char *x25_state[5]=
{
"LISTENING",
"SABM_SENT",
"DISC_SENT",
"ESTABLISHED",
"RECOVERY"
};
if(!(f=proc_fopen(_PATH_PROCNET_X25)))
{
if (errno != ENOENT) {
perror(_PATH_PROCNET_X25);
return(-1);
}
if (flag_arg || flag_ver)
ESYSNOT("netstat","AF X25");
if (flag_arg)
return(1);
else
return(0);
}
printf( _("Active X.25 sockets\n"));
/* IMHO, Vr/Vs is not very usefull --SF */
printf( _("Dest Source Device LCI State Vr/Vs Send-Q Recv-Q\n"));
fgets(buffer,256,f);
while(fgets(buffer,256,f))
{
buffer[10]=0;
buffer[20]=0;
sscanf(buffer+22,"%s %d %d %d %d %*d %*d %*d %*d %*d %*d %d %d %*d",
dev,&lci,&st,&vs,&vr,&sendq,&recvq);
if (!(flag_all || lci))
continue;
printf("%-15s %-15s %-7s %-3d %-11s %02d/%02d %-6d %-6d\n",
buffer,buffer+11,
dev,
lci,
x25_state[st],
vr,vs,sendq,recvq);
}
fclose(f);
return 0;
}
#endif
static int igmp_info(void)
{
INFO_GUTS6(_PATH_PROCNET_IGMP, _PATH_PROCNET_IGMP6, "AF INET (igmp)",
igmp_do_one, "igmp", "igmp6");
}
static int ip_parse_dots(uint32_t *addr, char const *src) {
unsigned a, b, c, d;
unsigned ret = 4-sscanf(src, "%u.%u.%u.%u", &a, &b, &c, &d);
*addr = htonl((a << 24)|(b << 16)|(c << 8)|d);
return ret;
}
static void print_ip_service(struct sockaddr_in *addr, char const *protname,
char *buf, unsigned size) {
struct aftype *ap;
if(size == 0) return;
/* print host */
if((ap = get_afntype(addr->sin_family)) == NULL) {
fprintf(stderr, _("netstat: unsupported address family %d !\n"),
addr->sin_family);
return;
}
safe_strncpy(buf, ap->sprint((struct sockaddr*)addr, flag_not), size);
/* print service */
if(flag_all || (flag_lst && !addr->sin_port) || (!flag_lst && addr->sin_port)) {
char bfs[32];
snprintf(bfs, sizeof(bfs), "%s",
get_sname(addr->sin_port, (char*)protname, flag_not & FLAG_NUM_PORT));
/* check if we must cut on host and/or service name */
{
unsigned const bufl = strlen(buf);
unsigned const bfsl = strlen(bfs);
if(bufl+bfsl+2 > size) {
unsigned const half = (size-2)>>1;
if(bufl > half) {
if(bfsl > half) {
buf[size-2-half] = '\0';
bfs[half+1] = '\0';
}
else buf[size-2-bfsl] = '\0';
}
else bfs[size-2-bufl] = '\0';
}
}
strcat(buf, ":");
strcat(buf, bfs);
}
}
/* process single SCTP endpoint */
static void sctp_do_ept(int lnr, char const *line, const char *prot)
{
struct sockaddr_in laddr, raddr;
unsigned uid, inode;
char l_addr[23], r_addr[23];
/* fill sockaddr_in structures */
{
unsigned lport;
unsigned ate;
if(lnr == 0) return;
if(sscanf(line, "%*X %*X %*u %*u %*u %u %u %u %n",
&lport, &uid, &inode, &ate) < 3) goto err;
/* decode IP address */
if(ip_parse_dots(&laddr.sin_addr.s_addr, line+ate)) goto err;
raddr.sin_addr.s_addr = htonl(0);
laddr.sin_family = raddr.sin_family = AF_INET;
laddr.sin_port = htons(lport);
raddr.sin_port = htons(0);
}
/* print IP:service to l_addr and r_addr */
print_ip_service(&laddr, prot, l_addr, sizeof(l_addr));
print_ip_service(&raddr, prot, r_addr, sizeof(r_addr));
/* Print line */
printf("%-4s %6d %6d %-*s %-*s %-11s",
prot, 0, 0,
(int)netmax(23,strlen(l_addr)), l_addr,
(int)netmax(23,strlen(r_addr)), r_addr,
_(tcp_state[TCP_LISTEN]));
finish_this_one(uid, inode, "");
return;
err:
fprintf(stderr, "SCTP error in line: %d\n", lnr);
}
/* process single SCTP association */
static void sctp_do_assoc(int lnr, char const *line, const char *prot)
{
struct sockaddr_in laddr, raddr;
unsigned long rxq, txq;
unsigned uid, inode;
char l_addr[23], r_addr[23];
/* fill sockaddr_in structures */
{
unsigned lport, rport;
unsigned ate;
char const *addr;
if(lnr == 0) return;
if(sscanf(line, "%*X %*X %*u %*u %*u %*u %*u %lu %lu %u %u %u %u %n",
&txq, &rxq, &uid, &inode, &lport, &rport, &ate) < 6) goto err;
/* decode IP addresses */
addr = strchr(line+ate, '*');
if(addr == 0) goto err;
if(ip_parse_dots(&laddr.sin_addr.s_addr, ++addr)) goto err;
addr = strchr(addr, '*');
if(addr == 0) goto err;
if(ip_parse_dots(&raddr.sin_addr.s_addr, ++addr)) goto err;
/* complete sockaddr_in structures */
laddr.sin_family = raddr.sin_family = AF_INET;
laddr.sin_port = htons(lport);
raddr.sin_port = htons(rport);
}
/* print IP:service to l_addr and r_addr */
print_ip_service(&laddr, prot, l_addr, sizeof(l_addr));
print_ip_service(&raddr, prot, r_addr, sizeof(r_addr));
/* Print line */
printf("%-4s %6ld %6ld %-*s %-*s %-11s",
prot, rxq, txq,
(int)netmax(23,strlen(l_addr)), l_addr,
(int)netmax(23,strlen(r_addr)), r_addr,
_(tcp_state[TCP_ESTABLISHED]));
finish_this_one(uid, inode, "");
return;
err:
fprintf(stderr, "SCTP error in line: %d\n", lnr);
}
static int sctp_info_epts(void) {
INFO_GUTS6(_PATH_PROCNET_SCTPEPTS, _PATH_PROCNET_SCTP6EPTS, "AF INET (sctp)",
sctp_do_ept, "sctp", "sctp6");
}
static int sctp_info_assocs(void) {
INFO_GUTS6(_PATH_PROCNET_SCTPASSOCS, _PATH_PROCNET_SCTP6ASSOCS, "AF INET (sctp)",
sctp_do_assoc, "sctp", "sctp6");
}
static int sctp_info(void) {
int res;
res = sctp_info_epts();
if(res) return res;
return sctp_info_assocs();
}
static void tcp_do_one(int lnr, const char *line, const char *prot)
{
unsigned long rxq, txq, time_len, retr, inode;
int num, local_port, rem_port, d, state, uid, timer_run, timeout;
char rem_addr[128], local_addr[128], timers[64], buffer[1024], more[512];
struct aftype *ap;
#if HAVE_AFINET6
struct sockaddr_in6 localaddr, remaddr;
char addr6[INET6_ADDRSTRLEN];
struct in6_addr in6;
extern struct aftype inet6_aftype;
#else
struct sockaddr_in localaddr, remaddr;
#endif
if (lnr == 0)
return;
num = sscanf(line,
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %lu %512s\n",
&d, local_addr, &local_port, rem_addr, &rem_port, &state,
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
if (!flag_all && ((flag_lst && rem_port) || (!flag_lst && !rem_port)))
return;
if (strlen(local_addr) > 8) {
#if HAVE_AFINET6
/* Demangle what the kernel gives us */
sscanf(local_addr, "%08X%08X%08X%08X",
&in6.s6_addr32[0], &in6.s6_addr32[1],
&in6.s6_addr32[2], &in6.s6_addr32[3]);
inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
inet6_aftype.input(1, addr6, (struct sockaddr *) &localaddr);
sscanf(rem_addr, "%08X%08X%08X%08X",
&in6.s6_addr32[0], &in6.s6_addr32[1],
&in6.s6_addr32[2], &in6.s6_addr32[3]);
inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
inet6_aftype.input(1, addr6, (struct sockaddr *) &remaddr);
localaddr.sin6_family = AF_INET6;
remaddr.sin6_family = AF_INET6;
#endif
} 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 < 11) {
fprintf(stderr, _("warning, got bogus tcp line.\n"));
return;
}
if ((ap = get_afntype(((struct sockaddr *) &localaddr)->sa_family)) == NULL) {
fprintf(stderr, _("netstat: unsupported address family %d !\n"),
((struct sockaddr *) &localaddr)->sa_family);
return;
}
safe_strncpy(local_addr, ap->sprint((struct sockaddr *) &localaddr,
flag_not), sizeof(local_addr));
safe_strncpy(rem_addr, ap->sprint((struct sockaddr *) &remaddr, flag_not),
sizeof(rem_addr));
snprintf(buffer, sizeof(buffer), "%s",
get_sname(htons(local_port), "tcp",
flag_not & FLAG_NUM_PORT));
if (!flag_wide) {
if ((strlen(local_addr) + strlen(buffer)) > 22)
local_addr[22 - strlen(buffer)] = '\0';
}
strcat(local_addr, ":");
strcat(local_addr, buffer);
snprintf(buffer, sizeof(buffer), "%s",
get_sname(htons(rem_port), "tcp", flag_not & FLAG_NUM_PORT));
if (!flag_wide) {
if ((strlen(rem_addr) + strlen(buffer)) > 22)
rem_addr[22 - strlen(buffer)] = '\0';
}
strcat(rem_addr, ":");
strcat(rem_addr, buffer);
timers[0] = '\0';
if (flag_opt)
switch (timer_run) {
case 0:
snprintf(timers, sizeof(timers), _("off (0.00/%ld/%d)"), retr, timeout);
break;
case 1:
snprintf(timers, sizeof(timers), _("on (%2.2f/%ld/%d)"),
(double) time_len / HZ, retr, timeout);
break;
case 2:
snprintf(timers, sizeof(timers), _("keepalive (%2.2f/%ld/%d)"),
(double) time_len / HZ, retr, timeout);
break;
case 3:
snprintf(timers, sizeof(timers), _("timewait (%2.2f/%ld/%d)"),
(double) time_len / HZ, retr, timeout);
break;
default:
snprintf(timers, sizeof(timers), _("unkn-%d (%2.2f/%ld/%d)"),
timer_run, (double) time_len / HZ, retr, timeout);
break;
}
printf("%-4s %6ld %6ld %-*s %-*s %-11s",
prot, rxq, txq, (int)netmax(23,strlen(local_addr)), local_addr, (int)netmax(23,strlen(rem_addr)), rem_addr, _(tcp_state[state]));
finish_this_one(uid,inode,timers);
}
static int tcp_info(void)
{
INFO_GUTS6(_PATH_PROCNET_TCP, _PATH_PROCNET_TCP6, "AF INET (tcp)",
tcp_do_one, "tcp", "tcp6");
}
static void udp_do_one(int lnr, const char *line,const char *prot)
{
char buffer[8192], local_addr[64], rem_addr[64];