mkinitrd-6_2_0/networking/netstat.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) 2002 by Bart Visscher <magick@linux-fan.com>
 *
 * 2002-04-20
 * IPV6 support added by Bart Visscher <magick@linux-fan.com>
 *
 * 2008-07-10
 * optional '-p' flag support ported from net-tools by G. Somlo <somlo@cmu.edu>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "libbb.h"
#include "inet_common.h"

#define NETSTAT_OPTS "laentuwx" \
	IF_ROUTE(               "r") \
	IF_FEATURE_NETSTAT_WIDE("W") \
	IF_FEATURE_NETSTAT_PRG( "p")

enum {
	OPTBIT_KEEP_OLD = 7,
	IF_ROUTE(               OPTBIT_ROUTE,)
	IF_FEATURE_NETSTAT_WIDE(OPTBIT_WIDE ,)
	IF_FEATURE_NETSTAT_PRG( OPTBIT_PRG  ,)
	OPT_sock_listen = 1 << 0, // l
	OPT_sock_all    = 1 << 1, // a
	OPT_extended    = 1 << 2, // e
	OPT_noresolve   = 1 << 3, // n
	OPT_sock_tcp    = 1 << 4, // t
	OPT_sock_udp    = 1 << 5, // u
	OPT_sock_raw    = 1 << 6, // w
	OPT_sock_unix   = 1 << 7, // x
	OPT_route       = IF_ROUTE(               (1 << OPTBIT_ROUTE)) + 0, // r
	OPT_wide        = IF_FEATURE_NETSTAT_WIDE((1 << OPTBIT_WIDE )) + 0, // W
	OPT_prg         = IF_FEATURE_NETSTAT_PRG( (1 << OPTBIT_PRG  )) + 0, // p
};

#define NETSTAT_CONNECTED 0x01
#define NETSTAT_LISTENING 0x02
#define NETSTAT_NUMERIC   0x04
/* Must match getopt32 option string */
#define NETSTAT_TCP       0x10
#define NETSTAT_UDP       0x20
#define NETSTAT_RAW       0x40
#define NETSTAT_UNIX      0x80
#define NETSTAT_ALLPROTO  (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX)


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            */

/* Standard printout size */
#define PRINT_IP_MAX_SIZE           23
#define PRINT_NET_CONN              "%s   %6ld %6ld %-23s %-23s %-12s"
#define PRINT_NET_CONN_HEADER       "\nProto Recv-Q Send-Q %-23s %-23s State       "

/* When there are IPv6 connections the IPv6 addresses will be
 * truncated to none-recognition. The '-W' option makes the
 * address columns wide enough to accomodate for longest possible
 * IPv6 addresses, i.e. addresses of the form
 * xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:ddd.ddd.ddd.ddd
 */
#define PRINT_IP_MAX_SIZE_WIDE      51  /* INET6_ADDRSTRLEN + 5 for the port number */
#define PRINT_NET_CONN_WIDE         "%s   %6ld %6ld %-51s %-51s %-12s"
#define PRINT_NET_CONN_HEADER_WIDE  "\nProto Recv-Q Send-Q %-51s %-51s State       "


#define PROGNAME_WIDTH     20
#define PROGNAME_WIDTH_STR "20"
/* PROGNAME_WIDTH chars: 12345678901234567890 */
#define PROGNAME_BANNER "PID/Program name    "

struct prg_node {
	struct prg_node *next;
	long inode;
	char name[PROGNAME_WIDTH];
};

#define PRG_HASH_SIZE 211


struct globals {
	const char *net_conn_line;
	smallint flags;
#if ENABLE_FEATURE_NETSTAT_PRG
	smallint prg_cache_loaded;
	struct prg_node *prg_hash[PRG_HASH_SIZE];
#endif
};
#define G (*ptr_to_globals)
#define flags            (G.flags           )
#define net_conn_line    (G.net_conn_line   )
#define prg_hash         (G.prg_hash        )
#define prg_cache_loaded (G.prg_cache_loaded)
#define INIT_G() do { \
	SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
	flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO; \
	net_conn_line = PRINT_NET_CONN; \
} while (0)


#if ENABLE_FEATURE_NETSTAT_PRG

/* Deliberately truncating long to unsigned *int* */
#define PRG_HASHIT(x) ((unsigned)(x) % PRG_HASH_SIZE)

#define print_progname_banner() do { \
	if (option_mask32 & OPT_prg) printf(PROGNAME_BANNER); \
} while (0)

static void prg_cache_add(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) != NULL; pnp = &pn->next) {
		if (pn->inode == inode) {
			/* Some warning should be appropriate here
			   as we got multiple processes for one i-node */
			return;
		}
	}
	*pnp = xzalloc(sizeof(struct prg_node));
	pn = *pnp;
	pn->inode = inode;
	safe_strncpy(pn->name, name, PROGNAME_WIDTH);
}

static const char *prg_cache_get(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 "-";
}

#if ENABLE_FEATURE_CLEAN_UP
static void prg_cache_clear(void)
{
	struct prg_node **pnp, *pn;

	for (pnp = prg_hash; pnp < prg_hash + PRG_HASH_SIZE; pnp++) {
		while ((pn = *pnp) != NULL) {
			*pnp = pn->next;
			free(pn);
		}
	}
}
#else
#define prg_cache_clear() ((void)0)
#endif

static long extract_socket_inode(const char *lname)
{
	long inode = -1;

	if (strncmp(lname, "socket:[", sizeof("socket:[")-1) == 0) {
		/* "socket:[12345]", extract the "12345" as inode */
		inode = bb_strtol(lname + sizeof("socket:[")-1, (char**)&lname, 0);
		if (*lname != ']')
			inode = -1;
	} else if (strncmp(lname, "[0000]:", sizeof("[0000]:")-1) == 0) {
		/* "[0000]:12345", extract the "12345" as inode */
		inode = bb_strtol(lname + sizeof("[0000]:")-1, NULL, 0);
		if (errno) /* not NUL terminated? */
			inode = -1;
	}

#if 0 /* bb_strtol returns all-ones bit pattern on ERANGE anyway */
	if (errno == ERANGE)
		inode = -1;
#endif
	return inode;
}

static int FAST_FUNC file_act(const char *fileName,
		struct stat *statbuf UNUSED_PARAM,
		void *userData,
		int depth UNUSED_PARAM)
{
	char *linkname;
	long inode;

	linkname = xmalloc_readlink(fileName);
	if (linkname != NULL) {
		inode = extract_socket_inode(linkname);
		free(linkname);
		if (inode >= 0)
			prg_cache_add(inode, (char *)userData);
	}
	return TRUE;
}

static int FAST_FUNC dir_act(const char *fileName,
		struct stat *statbuf UNUSED_PARAM,
		void *userData UNUSED_PARAM,
		int depth)
{
	const char *shortName;
	char *p, *q;
	char cmdline_buf[512];
	int i;

	if (depth == 0) /* "/proc" itself */
		return TRUE; /* continue looking one level below /proc */

	shortName = fileName + sizeof("/proc/")-1; /* point after "/proc/" */
	if (!isdigit(shortName[0])) /* skip /proc entries whic aren't processes */
		return SKIP;

	p = concat_path_file(fileName, "cmdline"); /* "/proc/PID/cmdline" */
	i = open_read_close(p, cmdline_buf, sizeof(cmdline_buf) - 1);
	free(p);
	if (i < 0)
		return FALSE;
	cmdline_buf[i] = '\0';
	q = concat_path_file(shortName, bb_basename(cmdline_buf)); /* "PID/argv0" */

	/* go through all files in /proc/PID/fd */
	p = concat_path_file(fileName, "fd");
	i = recursive_action(p, ACTION_RECURSE | ACTION_QUIET,
				file_act, NULL, (void *)q, 0);

	free(p);
	free(q);

	if (!i)
		return FALSE;	/* signal permissions error to caller */

	return SKIP;		/* caller should not recurse further into this dir. */
}

static void prg_cache_load(void)
{
	int load_ok;

	prg_cache_loaded = 1;
	load_ok = recursive_action("/proc", ACTION_RECURSE | ACTION_QUIET,
				NULL, dir_act, NULL, 0);
	if (load_ok)
		return;

	if (prg_cache_loaded == 1)
		bb_error_msg("can't scan /proc - are you root?");
	else
		bb_error_msg("showing only processes with your user ID");
}

#else

#define prg_cache_clear()       ((void)0)
#define print_progname_banner() ((void)0)

#endif //ENABLE_FEATURE_NETSTAT_PRG


#if ENABLE_FEATURE_IPV6
static void build_ipv6_addr(char* local_addr, struct sockaddr_in6* localaddr)
{
	char addr6[INET6_ADDRSTRLEN];
	struct in6_addr in6;

	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));
	inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr->sin6_addr);

	localaddr->sin6_family = AF_INET6;
}
#endif

#if ENABLE_FEATURE_IPV6
static void build_ipv4_addr(char* local_addr, struct sockaddr_in6* localaddr)
#else
static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr)
#endif
{
	sscanf(local_addr, "%X",
		   &((struct sockaddr_in *) localaddr)->sin_addr.s_addr);
	((struct sockaddr *) localaddr)->sa_family = AF_INET;
}

static const char *get_sname(int port, const char *proto, int numeric)
{
	if (!port)
		return "*";
	if (!numeric) {
		struct servent *se = getservbyport(port, proto);
		if (se)
			return se->s_name;
	}
	/* hummm, we may return static buffer here!! */
	return itoa(ntohs(port));
}

static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric)
{
	char *host, *host_port;

	/* Code which used "*" for INADDR_ANY is removed: it's ambiguous
	 * in IPv6, while "0.0.0.0" is not. */

	host = numeric ? xmalloc_sockaddr2dotted_noport(addr)
	               : xmalloc_sockaddr2host_noport(addr);

	host_port = xasprintf("%s:%s", host, get_sname(htons(port), proto, numeric));
	free(host);
	return host_port;
}

struct inet_params {
	int local_port, rem_port, state, uid;
#if ENABLE_FEATURE_IPV6
	struct sockaddr_in6 localaddr, remaddr;
#else
	struct sockaddr_in localaddr, remaddr;
#endif
	unsigned long rxq, txq, inode;
};

static int scan_inet_proc_line(struct inet_params *param, char *line)
{
	int num;
	char local_addr[64], rem_addr[64];

	num = sscanf(line,
			"%*d: %64[0-9A-Fa-f]:%X "
			"%64[0-9A-Fa-f]:%X %X "
			"%lX:%lX %*X:%*X "
			"%*X %d %*d %ld ",
			local_addr, &param->local_port,
			rem_addr, &param->rem_port, &param->state,
			&param->txq, &param->rxq,
			&param->uid, &param->inode);
	if (num < 9) {
		return 1; /* error */
	}

	if (strlen(local_addr) > 8) {
#if ENABLE_FEATURE_IPV6
		build_ipv6_addr(local_addr, &param->localaddr);
		build_ipv6_addr(rem_addr, &param->remaddr);
#endif
	} else {
		build_ipv4_addr(local_addr, &param->localaddr);
		build_ipv4_addr(rem_addr, &param->remaddr);
	}
	return 0;
}

static void print_inet_line(struct inet_params *param,
		const char *state_str, const char *proto, int is_connected)
{
	if ((is_connected && (flags & NETSTAT_CONNECTED))
	 || (!is_connected && (flags & NETSTAT_LISTENING))
	) {
		char *l = ip_port_str(
				(struct sockaddr *) &param->localaddr, param->local_port,
				proto, flags & NETSTAT_NUMERIC);
		char *r = ip_port_str(
				(struct sockaddr *) &param->remaddr, param->rem_port,
				proto, flags & NETSTAT_NUMERIC);
		printf(net_conn_line,
			proto, param->rxq, param->txq, l, r, state_str);
#if ENABLE_FEATURE_NETSTAT_PRG
		if (option_mask32 & OPT_prg)
			printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(param->inode));
#endif
		bb_putchar('\n');
		free(l);
		free(r);
	}
}

static int FAST_FUNC tcp_do_one(char *line)
{
	struct inet_params param;

	if (scan_inet_proc_line(&param, line))
		return 1;

	print_inet_line(&param, tcp_state[param.state], "tcp", param.rem_port);
	return 0;
}

#if ENABLE_FEATURE_IPV6
# define notnull(A) ( \
	( (A.sin6_family == AF_INET6)                               \
	  && (A.sin6_addr.s6_addr32[0] | A.sin6_addr.s6_addr32[1] | \
	      A.sin6_addr.s6_addr32[2] | A.sin6_addr.s6_addr32[3])  \
	) || (                                                      \
	  (A.sin6_family == AF_INET)                                \
	  && ((struct sockaddr_in*)&A)->sin_addr.s_addr             \
	)                                                           \
)
#else
# define notnull(A) (A.sin_addr.s_addr)
#endif

static int FAST_FUNC udp_do_one(char *line)
{
	int have_remaddr;
	const char *state_str;
	struct inet_params param;

	if (scan_inet_proc_line(&param, line))
		return 1;

	state_str = "UNKNOWN";
	switch (param.state) {
	case TCP_ESTABLISHED:
		state_str = "ESTABLISHED";
		break;
	case TCP_CLOSE:
		state_str = "";
		break;
	}

	have_remaddr = notnull(param.remaddr);
	print_inet_line(&param, state_str, "udp", have_remaddr);
	return 0;
}

static int FAST_FUNC raw_do_one(char *line)
{
	int have_remaddr;
	struct inet_params param;

	if (scan_inet_proc_line(&param, line))
		return 1;

	have_remaddr = notnull(param.remaddr);
	print_inet_line(&param, itoa(param.state), "raw", have_remaddr);
	return 0;
}

static int FAST_FUNC unix_do_one(char *line)
{
	unsigned long refcnt, proto, unix_flags;
	unsigned long inode;
	int type, state;
	int num, path_ofs;
	const char *ss_proto, *ss_state, *ss_type;
	char ss_flags[32];

	/* 2.6.15 may report lines like "... @/tmp/fam-user-^@^@^@^@^@^@^@..."
	 * Other users report long lines filled by NUL bytes.
	 * (those ^@ are NUL bytes too). We see them as empty lines. */
	if (!line[0])
		return 0;

	path_ofs = 0; /* paranoia */
	num = sscanf(line, "%*p: %lX %lX %lX %X %X %lu %n",
			&refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs);
	if (num < 6) {
		return 1; /* error */
	}
	if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
		if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
			if (!(flags & NETSTAT_LISTENING))
				return 0;
		} else {
			if (!(flags & NETSTAT_CONNECTED))
				return 0;
		}
	}

	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 %6lu ",
		ss_proto, refcnt, ss_flags, ss_type, ss_state, inode
		);

#if ENABLE_FEATURE_NETSTAT_PRG
	if (option_mask32 & OPT_prg)
		printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
#endif

	/* TODO: currently we stop at first NUL byte. Is it a problem? */
	line += path_ofs;
	*strchrnul(line, '\n') = '\0';
	while (*line)
		fputc_printable(*line++, stdout);
	bb_putchar('\n');
	return 0;
}

static void do_info(const char *file, int FAST_FUNC (*proc)(char *))
{
	int lnr;
	FILE *procinfo;
	char *buffer;

	/* _stdin is just to save "r" param */
	procinfo = fopen_or_warn_stdin(file);
	if (procinfo == NULL) {
		return;
	}
	lnr = 0;
	/* Why xmalloc_fgets_str? because it doesn't stop on NULs */
	while ((buffer = xmalloc_fgets_str(procinfo, "\n")) != NULL) {
		/* line 0 is skipped */
		if (lnr && proc(buffer))
			bb_error_msg("%s: bogus data on line %d", file, lnr + 1);
		lnr++;
		free(buffer);
	}
	fclose(procinfo);
}

int netstat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int netstat_main(int argc UNUSED_PARAM, char **argv)
{
	const char *net_conn_line_header = PRINT_NET_CONN_HEADER;
	unsigned opt;

	INIT_G();

	/* Option string must match NETSTAT_xxx constants */
	opt = getopt32(argv, NETSTAT_OPTS);
	if (opt & 0x1) { // -l
		flags &= ~NETSTAT_CONNECTED;
		flags |= NETSTAT_LISTENING;
	}
	if (opt & 0x2) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a
	//if (opt & 0x4) // -e
	if (opt & 0x8) flags |= NETSTAT_NUMERIC; // -n
	//if (opt & 0x10) // -t: NETSTAT_TCP
	//if (opt & 0x20) // -u: NETSTAT_UDP
	//if (opt & 0x40) // -w: NETSTAT_RAW
	//if (opt & 0x80) // -x: NETSTAT_UNIX
	if (opt & OPT_route) { // -r
#if ENABLE_ROUTE
		bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
		return 0;
#else
		bb_show_usage();
#endif
	}
	if (opt & OPT_wide) { // -W
		net_conn_line = PRINT_NET_CONN_WIDE;
		net_conn_line_header = PRINT_NET_CONN_HEADER_WIDE;
	}
#if ENABLE_FEATURE_NETSTAT_PRG
	if (opt & OPT_prg) { // -p
		prg_cache_load();
	}
#endif

	opt &= NETSTAT_ALLPROTO;
	if (opt) {
		flags &= ~NETSTAT_ALLPROTO;
		flags |= opt;
	}
	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(net_conn_line_header, "Local Address", "Foreign Address");
		print_progname_banner();
		bb_putchar('\n');
	}
	if (flags & NETSTAT_TCP) {
		do_info("/proc/net/tcp", tcp_do_one);
#if ENABLE_FEATURE_IPV6
		do_info("/proc/net/tcp6", tcp_do_one);
#endif
	}
	if (flags & NETSTAT_UDP) {
		do_info("/proc/net/udp", udp_do_one);
#if ENABLE_FEATURE_IPV6
		do_info("/proc/net/udp6", udp_do_one);
#endif
	}
	if (flags & NETSTAT_RAW) {
		do_info("/proc/net/raw", raw_do_one);
#if ENABLE_FEATURE_IPV6
		do_info("/proc/net/raw6", raw_do_one);
#endif
	}
	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 ");
		print_progname_banner();
		printf("Path\n");
		do_info("/proc/net/unix", unix_do_one);
	}
	prg_cache_clear();
	return 0;
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* Mini netstat implementation(s) for busybox
4			* based in part on the netstat implementation from net-tools.
5			*
6			* Copyright (C) 2002 by Bart Visscher <magick@linux-fan.com>
7			*
8			* 2002-04-20
9			* IPV6 support added by Bart Visscher <magick@linux-fan.com>
10			*
11	niro	816	* 2008-07-10
12			* optional '-p' flag support ported from net-tools by G. Somlo <somlo@cmu.edu>
13			*
14	niro	532	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
15			*/
16
17	niro	816	#include "libbb.h"
18	niro	532	#include "inet_common.h"
19
20	niro	816	#define NETSTAT_OPTS "laentuwx" \
21	niro	984	IF_ROUTE( "r") \
22			IF_FEATURE_NETSTAT_WIDE("W") \
23			IF_FEATURE_NETSTAT_PRG( "p")
24	niro	532
25	niro	816	enum {
26			OPTBIT_KEEP_OLD = 7,
27	niro	984	IF_ROUTE( OPTBIT_ROUTE,)
28			IF_FEATURE_NETSTAT_WIDE(OPTBIT_WIDE ,)
29			IF_FEATURE_NETSTAT_PRG( OPTBIT_PRG ,)
30	niro	816	OPT_sock_listen = 1 << 0, // l
31			OPT_sock_all = 1 << 1, // a
32			OPT_extended = 1 << 2, // e
33			OPT_noresolve = 1 << 3, // n
34			OPT_sock_tcp = 1 << 4, // t
35			OPT_sock_udp = 1 << 5, // u
36			OPT_sock_raw = 1 << 6, // w
37			OPT_sock_unix = 1 << 7, // x
38	niro	984	OPT_route = IF_ROUTE( (1 << OPTBIT_ROUTE)) + 0, // r
39			OPT_wide = IF_FEATURE_NETSTAT_WIDE((1 << OPTBIT_WIDE )) + 0, // W
40			OPT_prg = IF_FEATURE_NETSTAT_PRG( (1 << OPTBIT_PRG )) + 0, // p
41	niro	816	};
42
43			#define NETSTAT_CONNECTED 0x01
44			#define NETSTAT_LISTENING 0x02
45			#define NETSTAT_NUMERIC 0x04
46	niro	532	/* Must match getopt32 option string */
47	niro	816	#define NETSTAT_TCP 0x10
48			#define NETSTAT_UDP 0x20
49			#define NETSTAT_RAW 0x40
50			#define NETSTAT_UNIX 0x80
51			#define NETSTAT_ALLPROTO (NETSTAT_TCP\|NETSTAT_UDP\|NETSTAT_RAW\|NETSTAT_UNIX)
52	niro	532
53
54			enum {
55	niro	816	TCP_ESTABLISHED = 1,
56			TCP_SYN_SENT,
57			TCP_SYN_RECV,
58			TCP_FIN_WAIT1,
59			TCP_FIN_WAIT2,
60			TCP_TIME_WAIT,
61			TCP_CLOSE,
62			TCP_CLOSE_WAIT,
63			TCP_LAST_ACK,
64			TCP_LISTEN,
65			TCP_CLOSING, /* now a valid state */
66	niro	532	};
67
68	niro	816	static const char *const tcp_state[] = {
69			"",
70			"ESTABLISHED",
71			"SYN_SENT",
72			"SYN_RECV",
73			"FIN_WAIT1",
74			"FIN_WAIT2",
75			"TIME_WAIT",
76			"CLOSE",
77			"CLOSE_WAIT",
78			"LAST_ACK",
79			"LISTEN",
80			"CLOSING"
81	niro	532	};
82
83			typedef enum {
84	niro	816	SS_FREE = 0, /* not allocated */
85			SS_UNCONNECTED, /* unconnected to any socket */
86			SS_CONNECTING, /* in process of connecting */
87			SS_CONNECTED, /* connected to socket */
88			SS_DISCONNECTING /* in process of disconnecting */
89	niro	532	} socket_state;
90
91	niro	816	#define SO_ACCEPTCON (1<<16) /* performed a listen */
92			#define SO_WAITDATA (1<<17) /* wait data to read */
93			#define SO_NOSPACE (1<<18) /* no space to write */
94	niro	532
95	niro	816	/* Standard printout size */
96			#define PRINT_IP_MAX_SIZE 23
97			#define PRINT_NET_CONN "%s %6ld %6ld %-23s %-23s %-12s"
98			#define PRINT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-23s %-23s State "
99
100			/* When there are IPv6 connections the IPv6 addresses will be
101			* truncated to none-recognition. The '-W' option makes the
102			* address columns wide enough to accomodate for longest possible
103			* IPv6 addresses, i.e. addresses of the form
104			* xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:ddd.ddd.ddd.ddd
105			*/
106			#define PRINT_IP_MAX_SIZE_WIDE 51 /* INET6_ADDRSTRLEN + 5 for the port number */
107			#define PRINT_NET_CONN_WIDE "%s %6ld %6ld %-51s %-51s %-12s"
108			#define PRINT_NET_CONN_HEADER_WIDE "\nProto Recv-Q Send-Q %-51s %-51s State "
109
110
111			#define PROGNAME_WIDTH 20
112			#define PROGNAME_WIDTH_STR "20"
113			/* PROGNAME_WIDTH chars: 12345678901234567890 */
114			#define PROGNAME_BANNER "PID/Program name "
115
116			struct prg_node {
117			struct prg_node *next;
118			long inode;
119			char name[PROGNAME_WIDTH];
120			};
121
122			#define PRG_HASH_SIZE 211
123
124
125			struct globals {
126			const char *net_conn_line;
127			smallint flags;
128			#if ENABLE_FEATURE_NETSTAT_PRG
129			smallint prg_cache_loaded;
130			struct prg_node *prg_hash[PRG_HASH_SIZE];
131			#endif
132			};
133			#define G (*ptr_to_globals)
134			#define flags (G.flags )
135			#define net_conn_line (G.net_conn_line )
136			#define prg_hash (G.prg_hash )
137			#define prg_cache_loaded (G.prg_cache_loaded)
138			#define INIT_G() do { \
139			SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
140			flags = NETSTAT_CONNECTED \| NETSTAT_ALLPROTO; \
141			net_conn_line = PRINT_NET_CONN; \
142			} while (0)
143
144
145			#if ENABLE_FEATURE_NETSTAT_PRG
146
147			/* Deliberately truncating long to unsigned int */
148			#define PRG_HASHIT(x) ((unsigned)(x) % PRG_HASH_SIZE)
149
150			#define print_progname_banner() do { \
151			if (option_mask32 & OPT_prg) printf(PROGNAME_BANNER); \
152			} while (0)
153
154			static void prg_cache_add(long inode, char *name)
155	niro	532	{
156	niro	816	unsigned hi = PRG_HASHIT(inode);
157			struct prg_node *pnp, pn;
158
159			prg_cache_loaded = 2;
160			for (pnp = prg_hash + hi; (pn = *pnp) != NULL; pnp = &pn->next) {
161			if (pn->inode == inode) {
162			/* Some warning should be appropriate here
163			as we got multiple processes for one i-node */
164			return;
165			}
166	niro	532	}
167	niro	816	*pnp = xzalloc(sizeof(struct prg_node));
168			pn = *pnp;
169			pn->inode = inode;
170			safe_strncpy(pn->name, name, PROGNAME_WIDTH);
171	niro	532	}
172
173	niro	816	static const char *prg_cache_get(long inode)
174	niro	532	{
175	niro	816	unsigned hi = PRG_HASHIT(inode);
176			struct prg_node *pn;
177	niro	532
178	niro	816	for (pn = prg_hash[hi]; pn; pn = pn->next)
179			if (pn->inode == inode)
180			return pn->name;
181			return "-";
182	niro	532	}
183
184	niro	816	#if ENABLE_FEATURE_CLEAN_UP
185			static void prg_cache_clear(void)
186	niro	532	{
187	niro	816	struct prg_node *pnp, pn;
188
189			for (pnp = prg_hash; pnp < prg_hash + PRG_HASH_SIZE; pnp++) {
190			while ((pn = *pnp) != NULL) {
191			*pnp = pn->next;
192			free(pn);
193			}
194			}
195			}
196	niro	532	#else
197	niro	816	#define prg_cache_clear() ((void)0)
198	niro	532	#endif
199
200	niro	816	static long extract_socket_inode(const char *lname)
201			{
202			long inode = -1;
203	niro	532
204	niro	816	if (strncmp(lname, "socket:[", sizeof("socket:[")-1) == 0) {
205			/* "socket:[12345]", extract the "12345" as inode */
206			inode = bb_strtol(lname + sizeof("socket:[")-1, (char**)&lname, 0);
207			if (*lname != ']')
208			inode = -1;
209			} else if (strncmp(lname, "[0000]:", sizeof("[0000]:")-1) == 0) {
210			/* "[0000]:12345", extract the "12345" as inode */
211			inode = bb_strtol(lname + sizeof("[0000]:")-1, NULL, 0);
212			if (errno) /* not NUL terminated? */
213			inode = -1;
214			}
215	niro	532
216	niro	816	#if 0 /* bb_strtol returns all-ones bit pattern on ERANGE anyway */
217			if (errno == ERANGE)
218			inode = -1;
219	niro	532	#endif
220	niro	816	return inode;
221			}
222	niro	532
223	niro	816	static int FAST_FUNC file_act(const char *fileName,
224			struct stat *statbuf UNUSED_PARAM,
225			void *userData,
226			int depth UNUSED_PARAM)
227			{
228			char *linkname;
229			long inode;
230
231			linkname = xmalloc_readlink(fileName);
232			if (linkname != NULL) {
233			inode = extract_socket_inode(linkname);
234			free(linkname);
235			if (inode >= 0)
236			prg_cache_add(inode, (char *)userData);
237	niro	532	}
238	niro	816	return TRUE;
239			}
240	niro	532
241	niro	816	static int FAST_FUNC dir_act(const char *fileName,
242			struct stat *statbuf UNUSED_PARAM,
243			void *userData UNUSED_PARAM,
244			int depth)
245			{
246			const char *shortName;
247			char p, q;
248			char cmdline_buf[512];
249			int i;
250	niro	532
251	niro	816	if (depth == 0) /* "/proc" itself */
252			return TRUE; /* continue looking one level below /proc */
253	niro	532
254	niro	816	shortName = fileName + sizeof("/proc/")-1; /* point after "/proc/" */
255			if (!isdigit(shortName[0])) /* skip /proc entries whic aren't processes */
256			return SKIP;
257
258			p = concat_path_file(fileName, "cmdline"); /* "/proc/PID/cmdline" */
259			i = open_read_close(p, cmdline_buf, sizeof(cmdline_buf) - 1);
260			free(p);
261			if (i < 0)
262			return FALSE;
263			cmdline_buf[i] = '\0';
264			q = concat_path_file(shortName, bb_basename(cmdline_buf)); /* "PID/argv0" */
265
266			/* go through all files in /proc/PID/fd */
267			p = concat_path_file(fileName, "fd");
268			i = recursive_action(p, ACTION_RECURSE \| ACTION_QUIET,
269			file_act, NULL, (void *)q, 0);
270
271			free(p);
272			free(q);
273
274			if (!i)
275			return FALSE; /* signal permissions error to caller */
276
277			return SKIP; /* caller should not recurse further into this dir. */
278	niro	532	}
279
280	niro	816	static void prg_cache_load(void)
281	niro	532	{
282	niro	816	int load_ok;
283	niro	532
284	niro	816	prg_cache_loaded = 1;
285			load_ok = recursive_action("/proc", ACTION_RECURSE \| ACTION_QUIET,
286			NULL, dir_act, NULL, 0);
287			if (load_ok)
288	niro	532	return;
289
290	niro	816	if (prg_cache_loaded == 1)
291			bb_error_msg("can't scan /proc - are you root?");
292			else
293			bb_error_msg("showing only processes with your user ID");
294			}
295	niro	532
296	niro	816	#else
297	niro	532
298	niro	816	#define prg_cache_clear() ((void)0)
299			#define print_progname_banner() ((void)0)
300	niro	532
301	niro	816	#endif //ENABLE_FEATURE_NETSTAT_PRG
302	niro	532
303
304	niro	816	#if ENABLE_FEATURE_IPV6
305			static void build_ipv6_addr(char* local_addr, struct sockaddr_in6* localaddr)
306			{
307			char addr6[INET6_ADDRSTRLEN];
308			struct in6_addr in6;
309
310			sscanf(local_addr, "%08X%08X%08X%08X",
311			&in6.s6_addr32[0], &in6.s6_addr32[1],
312			&in6.s6_addr32[2], &in6.s6_addr32[3]);
313			inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
314			inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr->sin6_addr);
315
316			localaddr->sin6_family = AF_INET6;
317			}
318			#endif
319
320			#if ENABLE_FEATURE_IPV6
321			static void build_ipv4_addr(char* local_addr, struct sockaddr_in6* localaddr)
322	niro	532	#else
323	niro	816	static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr)
324	niro	532	#endif
325	niro	816	{
326			sscanf(local_addr, "%X",
327			&((struct sockaddr_in *) localaddr)->sin_addr.s_addr);
328			((struct sockaddr *) localaddr)->sa_family = AF_INET;
329			}
330	niro	532
331	niro	816	static const char get_sname(int port, const char proto, int numeric)
332			{
333			if (!port)
334			return "*";
335			if (!numeric) {
336			struct servent *se = getservbyport(port, proto);
337			if (se)
338			return se->s_name;
339			}
340			/* hummm, we may return static buffer here!! */
341			return itoa(ntohs(port));
342			}
343	niro	532
344	niro	816	static char ip_port_str(struct sockaddr addr, int port, const char *proto, int numeric)
345			{
346			char host, host_port;
347	niro	532
348	niro	816	/* Code which used "*" for INADDR_ANY is removed: it's ambiguous
349			* in IPv6, while "0.0.0.0" is not. */
350
351			host = numeric ? xmalloc_sockaddr2dotted_noport(addr)
352			: xmalloc_sockaddr2host_noport(addr);
353
354			host_port = xasprintf("%s:%s", host, get_sname(htons(port), proto, numeric));
355			free(host);
356			return host_port;
357	niro	532	}
358
359	niro	816	struct inet_params {
360			int local_port, rem_port, state, uid;
361			#if ENABLE_FEATURE_IPV6
362	niro	532	struct sockaddr_in6 localaddr, remaddr;
363			#else
364			struct sockaddr_in localaddr, remaddr;
365			#endif
366	niro	816	unsigned long rxq, txq, inode;
367			};
368	niro	532
369	niro	816	static int scan_inet_proc_line(struct inet_params param, char line)
370			{
371			int num;
372			char local_addr[64], rem_addr[64];
373	niro	532
374			num = sscanf(line,
375	niro	816	"%*d: %64[0-9A-Fa-f]:%X "
376			"%64[0-9A-Fa-f]:%X %X "
377			"%lX:%lX %X:%X "
378			"%X %d %d %ld ",
379			local_addr, &param->local_port,
380			rem_addr, &param->rem_port, &param->state,
381			&param->txq, &param->rxq,
382			&param->uid, &param->inode);
383			if (num < 9) {
384			return 1; /* error */
385			}
386	niro	532
387			if (strlen(local_addr) > 8) {
388	niro	816	#if ENABLE_FEATURE_IPV6
389			build_ipv6_addr(local_addr, &param->localaddr);
390			build_ipv6_addr(rem_addr, &param->remaddr);
391	niro	532	#endif
392			} else {
393	niro	816	build_ipv4_addr(local_addr, &param->localaddr);
394			build_ipv4_addr(rem_addr, &param->remaddr);
395	niro	532	}
396	niro	816	return 0;
397			}
398	niro	532
399	niro	816	static void print_inet_line(struct inet_params *param,
400			const char state_str, const char proto, int is_connected)
401			{
402			if ((is_connected && (flags & NETSTAT_CONNECTED))
403			\|\| (!is_connected && (flags & NETSTAT_LISTENING))
404			) {
405			char *l = ip_port_str(
406			(struct sockaddr *) &param->localaddr, param->local_port,
407			proto, flags & NETSTAT_NUMERIC);
408			char *r = ip_port_str(
409			(struct sockaddr *) &param->remaddr, param->rem_port,
410			proto, flags & NETSTAT_NUMERIC);
411			printf(net_conn_line,
412			proto, param->rxq, param->txq, l, r, state_str);
413			#if ENABLE_FEATURE_NETSTAT_PRG
414			if (option_mask32 & OPT_prg)
415			printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(param->inode));
416			#endif
417			bb_putchar('\n');
418			free(l);
419			free(r);
420	niro	532	}
421	niro	816	}
422	niro	532
423	niro	816	static int FAST_FUNC tcp_do_one(char *line)
424			{
425			struct inet_params param;
426
427			if (scan_inet_proc_line(&param, line))
428			return 1;
429
430			print_inet_line(&param, tcp_state[param.state], "tcp", param.rem_port);
431			return 0;
432			}
433
434			#if ENABLE_FEATURE_IPV6
435			# define notnull(A) ( \
436			( (A.sin6_family == AF_INET6) \
437			&& (A.sin6_addr.s6_addr32[0] \| A.sin6_addr.s6_addr32[1] \| \
438			A.sin6_addr.s6_addr32[2] \| A.sin6_addr.s6_addr32[3]) \
439			) \|\| ( \
440			(A.sin6_family == AF_INET) \
441			&& ((struct sockaddr_in*)&A)->sin_addr.s_addr \
442			) \
443			)
444	niro	532	#else
445			# define notnull(A) (A.sin_addr.s_addr)
446			#endif
447
448	niro	816	static int FAST_FUNC udp_do_one(char *line)
449			{
450			int have_remaddr;
451			const char *state_str;
452			struct inet_params param;
453	niro	532
454	niro	816	if (scan_inet_proc_line(&param, line))
455			return 1;
456	niro	532
457	niro	816	state_str = "UNKNOWN";
458			switch (param.state) {
459			case TCP_ESTABLISHED:
460			state_str = "ESTABLISHED";
461			break;
462			case TCP_CLOSE:
463			state_str = "";
464			break;
465	niro	532	}
466	niro	816
467			have_remaddr = notnull(param.remaddr);
468			print_inet_line(&param, state_str, "udp", have_remaddr);
469			return 0;
470	niro	532	}
471
472	niro	816	static int FAST_FUNC raw_do_one(char *line)
473			{
474			int have_remaddr;
475			struct inet_params param;
476	niro	532
477	niro	816	if (scan_inet_proc_line(&param, line))
478			return 1;
479
480			have_remaddr = notnull(param.remaddr);
481			print_inet_line(&param, itoa(param.state), "raw", have_remaddr);
482			return 0;
483			}
484
485			static int FAST_FUNC unix_do_one(char *line)
486	niro	532	{
487			unsigned long refcnt, proto, unix_flags;
488	niro	816	unsigned long inode;
489			int type, state;
490			int num, path_ofs;
491			const char ss_proto, ss_state, *ss_type;
492			char ss_flags[32];
493	niro	532
494	niro	816	/* 2.6.15 may report lines like "... @/tmp/fam-user-^@^@^@^@^@^@^@..."
495			* Other users report long lines filled by NUL bytes.
496			* (those ^@ are NUL bytes too). We see them as empty lines. */
497			if (!line[0])
498			return 0;
499
500			path_ofs = 0; /* paranoia */
501			num = sscanf(line, "%*p: %lX %lX %lX %X %X %lu %n",
502			&refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs);
503	niro	532	if (num < 6) {
504	niro	816	return 1; /* error */
505	niro	532	}
506	niro	816	if ((flags & (NETSTAT_LISTENING\|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING\|NETSTAT_CONNECTED)) {
507	niro	532	if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
508	niro	816	if (!(flags & NETSTAT_LISTENING))
509			return 0;
510	niro	532	} else {
511	niro	816	if (!(flags & NETSTAT_CONNECTED))
512			return 0;
513	niro	532	}
514			}
515
516			switch (proto) {
517			case 0:
518			ss_proto = "unix";
519			break;
520			default:
521			ss_proto = "??";
522			}
523
524			switch (type) {
525			case SOCK_STREAM:
526			ss_type = "STREAM";
527			break;
528			case SOCK_DGRAM:
529			ss_type = "DGRAM";
530			break;
531			case SOCK_RAW:
532			ss_type = "RAW";
533			break;
534			case SOCK_RDM:
535			ss_type = "RDM";
536			break;
537			case SOCK_SEQPACKET:
538			ss_type = "SEQPACKET";
539			break;
540			default:
541			ss_type = "UNKNOWN";
542			}
543
544			switch (state) {
545			case SS_FREE:
546			ss_state = "FREE";
547			break;
548			case SS_UNCONNECTED:
549			/*
550			* Unconnected sockets may be listening
551			* for something.
552			*/
553			if (unix_flags & SO_ACCEPTCON) {
554			ss_state = "LISTENING";
555			} else {
556			ss_state = "";
557			}
558			break;
559			case SS_CONNECTING:
560			ss_state = "CONNECTING";
561			break;
562			case SS_CONNECTED:
563			ss_state = "CONNECTED";
564			break;
565			case SS_DISCONNECTING:
566			ss_state = "DISCONNECTING";
567			break;
568			default:
569			ss_state = "UNKNOWN";
570			}
571
572			strcpy(ss_flags, "[ ");
573			if (unix_flags & SO_ACCEPTCON)
574			strcat(ss_flags, "ACC ");
575			if (unix_flags & SO_WAITDATA)
576			strcat(ss_flags, "W ");
577			if (unix_flags & SO_NOSPACE)
578			strcat(ss_flags, "N ");
579			strcat(ss_flags, "]");
580
581	niro	816	printf("%-5s %-6ld %-11s %-10s %-13s %6lu ",
582			ss_proto, refcnt, ss_flags, ss_type, ss_state, inode
583			);
584
585			#if ENABLE_FEATURE_NETSTAT_PRG
586			if (option_mask32 & OPT_prg)
587			printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
588			#endif
589
590			/* TODO: currently we stop at first NUL byte. Is it a problem? */
591			line += path_ofs;
592			*strchrnul(line, '\n') = '\0';
593			while (*line)
594			fputc_printable(*line++, stdout);
595			bb_putchar('\n');
596			return 0;
597	niro	532	}
598
599	niro	816	static void do_info(const char file, int FAST_FUNC (proc)(char *))
600	niro	532	{
601	niro	816	int lnr;
602	niro	532	FILE *procinfo;
603	niro	816	char *buffer;
604	niro	532
605	niro	816	/* _stdin is just to save "r" param */
606			procinfo = fopen_or_warn_stdin(file);
607	niro	532	if (procinfo == NULL) {
608	niro	816	return;
609	niro	532	}
610	niro	816	lnr = 0;
611			/* Why xmalloc_fgets_str? because it doesn't stop on NULs */
612			while ((buffer = xmalloc_fgets_str(procinfo, "\n")) != NULL) {
613			/* line 0 is skipped */
614			if (lnr && proc(buffer))
615			bb_error_msg("%s: bogus data on line %d", file, lnr + 1);
616			lnr++;
617			free(buffer);
618			}
619			fclose(procinfo);
620	niro	532	}
621
622	niro	816	int netstat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
623			int netstat_main(int argc UNUSED_PARAM, char **argv)
624	niro	532	{
625	niro	816	const char *net_conn_line_header = PRINT_NET_CONN_HEADER;
626	niro	532	unsigned opt;
627
628	niro	816	INIT_G();
629
630	niro	532	/* Option string must match NETSTAT_xxx constants */
631	niro	816	opt = getopt32(argv, NETSTAT_OPTS);
632	niro	532	if (opt & 0x1) { // -l
633			flags &= ~NETSTAT_CONNECTED;
634			flags \|= NETSTAT_LISTENING;
635			}
636			if (opt & 0x2) flags \|= NETSTAT_LISTENING \| NETSTAT_CONNECTED; // -a
637			//if (opt & 0x4) // -e
638			if (opt & 0x8) flags \|= NETSTAT_NUMERIC; // -n
639			//if (opt & 0x10) // -t: NETSTAT_TCP
640			//if (opt & 0x20) // -u: NETSTAT_UDP
641			//if (opt & 0x40) // -w: NETSTAT_RAW
642			//if (opt & 0x80) // -x: NETSTAT_UNIX
643	niro	816	if (opt & OPT_route) { // -r
644			#if ENABLE_ROUTE
645			bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
646	niro	532	return 0;
647			#else
648	niro	816	bb_show_usage();
649	niro	532	#endif
650			}
651	niro	816	if (opt & OPT_wide) { // -W
652			net_conn_line = PRINT_NET_CONN_WIDE;
653			net_conn_line_header = PRINT_NET_CONN_HEADER_WIDE;
654			}
655			#if ENABLE_FEATURE_NETSTAT_PRG
656			if (opt & OPT_prg) { // -p
657			prg_cache_load();
658			}
659			#endif
660	niro	532
661			opt &= NETSTAT_ALLPROTO;
662			if (opt) {
663			flags &= ~NETSTAT_ALLPROTO;
664			flags \|= opt;
665			}
666			if (flags & (NETSTAT_TCP\|NETSTAT_UDP\|NETSTAT_RAW)) {
667			printf("Active Internet connections "); /* xxx */
668
669	niro	816	if ((flags & (NETSTAT_LISTENING\|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING\|NETSTAT_CONNECTED))
670	niro	532	printf("(servers and established)");
671	niro	816	else if (flags & NETSTAT_LISTENING)
672			printf("(only servers)");
673			else
674			printf("(w/o servers)");
675			printf(net_conn_line_header, "Local Address", "Foreign Address");
676			print_progname_banner();
677			bb_putchar('\n');
678	niro	532	}
679	niro	816	if (flags & NETSTAT_TCP) {
680			do_info("/proc/net/tcp", tcp_do_one);
681			#if ENABLE_FEATURE_IPV6
682			do_info("/proc/net/tcp6", tcp_do_one);
683	niro	532	#endif
684	niro	816	}
685			if (flags & NETSTAT_UDP) {
686			do_info("/proc/net/udp", udp_do_one);
687			#if ENABLE_FEATURE_IPV6
688			do_info("/proc/net/udp6", udp_do_one);
689	niro	532	#endif
690	niro	816	}
691			if (flags & NETSTAT_RAW) {
692			do_info("/proc/net/raw", raw_do_one);
693			#if ENABLE_FEATURE_IPV6
694			do_info("/proc/net/raw6", raw_do_one);
695	niro	532	#endif
696	niro	816	}
697			if (flags & NETSTAT_UNIX) {
698	niro	532	printf("Active UNIX domain sockets ");
699	niro	816	if ((flags & (NETSTAT_LISTENING\|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING\|NETSTAT_CONNECTED))
700	niro	532	printf("(servers and established)");
701	niro	816	else if (flags & NETSTAT_LISTENING)
702			printf("(only servers)");
703			else
704			printf("(w/o servers)");
705			printf("\nProto RefCnt Flags Type State I-Node ");
706			print_progname_banner();
707			printf("Path\n");
708			do_info("/proc/net/unix", unix_do_one);
709	niro	532	}
710	niro	816	prg_cache_clear();
711	niro	532	return 0;
712			}