diff options
Diffstat (limited to 'release/src/router/busybox/networking/netstat.c')
| -rw-r--r-- | release/src/router/busybox/networking/netstat.c | 1005 |
1 files changed, 528 insertions, 477 deletions
diff --git a/release/src/router/busybox/networking/netstat.c b/release/src/router/busybox/networking/netstat.c index 17a58876..b2462806 100644 --- a/release/src/router/busybox/networking/netstat.c +++ b/release/src/router/busybox/networking/netstat.c @@ -5,432 +5,511 @@ * * Copyright (C) 2002 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 - * * 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 <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 "libbb.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 +#define NETSTAT_OPTS "laentuwx" \ + USE_ROUTE( "r") \ + USE_FEATURE_NETSTAT_WIDE("W") \ + USE_FEATURE_NETSTAT_PRG( "p") -static int flags = NETSTAT_CONNECTED | - NETSTAT_TCP | NETSTAT_UDP | NETSTAT_RAW | NETSTAT_UNIX; +enum { + OPTBIT_KEEP_OLD = 7, + USE_ROUTE( OPTBIT_ROUTE,) + USE_FEATURE_NETSTAT_WIDE(OPTBIT_WIDE ,) + USE_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 = USE_ROUTE( (1 << OPTBIT_ROUTE)) + 0, // r + OPT_wide = USE_FEATURE_NETSTAT_WIDE((1 << OPTBIT_WIDE )) + 0, // W + OPT_prg = USE_FEATURE_NETSTAT_PRG( (1 << OPTBIT_PRG )) + 0, // p +}; -#define PROGNAME_WIDTHs PROGNAME_WIDTH1(PROGNAME_WIDTH) -#define PROGNAME_WIDTH1(s) PROGNAME_WIDTH2(s) -#define PROGNAME_WIDTH2(s) #s +#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) -#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 */ + 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" +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 */ + 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 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; -} +/* 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 -static char *get_sname(int port, const char *proto, int num) + +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) { - char *str=itoa(ntohs(port)); - if (num) { - } else { - struct servent *se=getservbyport(port,proto); - if (se) - str=se->s_name; - } - if (!port) { - str="*"; + 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; + } } - return str; + *pnp = xzalloc(sizeof(struct prg_node)); + pn = *pnp; + pn->inode = inode; + safe_strncpy(pn->name, name, PROGNAME_WIDTH); } -static void snprint_ip_port(char *ip_port, int size, struct sockaddr *addr, int port, char *proto, int numeric) +static const char *prg_cache_get(long inode) { - char *port_name; + unsigned hi = PRG_HASHIT(inode); + struct prg_node *pn; -#ifdef CONFIG_FEATURE_IPV6 - if (addr->sa_family == AF_INET6) { - INET6_rresolve(ip_port, size, (struct sockaddr_in6 *)addr, - (numeric&NETSTAT_NUMERIC) ? 0x0fff : 0); - } else -#endif - { - 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); + for (pn = prg_hash[hi]; pn; pn = pn->next) + if (pn->inode == inode) + return pn->name; + return "-"; } -static void tcp_do_one(int lnr, const char *line) +#if ENABLE_FEATURE_CLEAN_UP +static void prg_cache_clear(void) { - 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; -#ifdef CONFIG_FEATURE_IPV6 - struct sockaddr_in6 localaddr, remaddr; - char addr6[INET6_ADDRSTRLEN]; - struct in6_addr in6; + 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 - struct sockaddr_in localaddr, remaddr; +#define prg_cache_clear() ((void)0) #endif - 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); +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 (strlen(local_addr) > 8) { -#ifdef CONFIG_FEATURE_IPV6 - 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); - 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)); - inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr); - localaddr.sin6_family = AF_INET6; - remaddr.sin6_family = AF_INET6; +#if 0 /* bb_strtol returns all-ones bit pattern on ERANGE anyway */ + if (errno == ERANGE) + inode = -1; #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; - } + return inode; +} - if (num < 10) { - bb_error_msg("warning, got bogus tcp line."); - return; +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); } - 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); + 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 udp_do_one(int lnr, const char *line) +static void prg_cache_load(void) { - char local_addr[64], rem_addr[64]; - char *state_str, more[512]; - int num, local_port, rem_port, d, state, timer_run, uid, timeout; -#ifdef CONFIG_FEATURE_IPV6 - struct sockaddr_in6 localaddr, remaddr; - char addr6[INET6_ADDRSTRLEN]; - struct in6_addr in6; -#else - struct sockaddr_in localaddr, remaddr; -#endif - unsigned long rxq, txq, time_len, retr, inode; + int load_ok; - if (lnr == 0) + prg_cache_loaded = 1; + load_ok = recursive_action("/proc", ACTION_RECURSE | ACTION_QUIET, + NULL, dir_act, NULL, 0); + if (load_ok) 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 (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"); +} - if (strlen(local_addr) > 8) { -#ifdef CONFIG_FEATURE_IPV6 - /* 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)); - inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr.sin6_addr); - 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)); - inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr); - 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; - } +#else - if (num < 10) { - bb_error_msg("warning, got bogus udp line."); - return; - } - switch (state) { - case TCP_ESTABLISHED: - state_str = "ESTABLISHED"; - break; +#define prg_cache_clear() ((void)0) +#define print_progname_banner() ((void)0) - case TCP_CLOSE: - state_str = ""; - break; +#endif //ENABLE_FEATURE_NETSTAT_PRG - default: - state_str = "UNKNOWN"; - break; - } -#ifdef CONFIG_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)) +#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 -# define notnull(A) (A.sin_addr.s_addr) +static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr) #endif - 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); +{ + 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 void raw_do_one(int lnr, const char *line) +static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric) { - char local_addr[64], rem_addr[64]; - char *state_str, more[512]; - int num, local_port, rem_port, d, state, timer_run, uid, timeout; -#ifdef CONFIG_FEATURE_IPV6 + 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; - char addr6[INET6_ADDRSTRLEN]; - struct in6_addr in6; #else struct sockaddr_in localaddr, remaddr; #endif - unsigned long rxq, txq, time_len, retr, inode; + unsigned long rxq, txq, inode; +}; - if (lnr == 0) - return; +static int scan_inet_proc_line(struct inet_params *param, char *line) +{ + int num; + char local_addr[64], rem_addr[64]; - 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); + "%*d: %64[0-9A-Fa-f]:%X " + "%64[0-9A-Fa-f]:%X %X " + "%lX:%lX %*X:%*X " + "%*X %d %*d %ld ", + local_addr, ¶m->local_port, + rem_addr, ¶m->rem_port, ¶m->state, + ¶m->txq, ¶m->rxq, + ¶m->uid, ¶m->inode); + if (num < 9) { + return 1; /* error */ + } if (strlen(local_addr) > 8) { -#ifdef CONFIG_FEATURE_IPV6 - 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); - 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)); - inet_pton(AF_INET6, addr6, (struct sockaddr *) &remaddr.sin6_addr); - localaddr.sin6_family = AF_INET6; - remaddr.sin6_family = AF_INET6; +#if ENABLE_FEATURE_IPV6 + build_ipv6_addr(local_addr, ¶m->localaddr); + build_ipv6_addr(rem_addr, ¶m->remaddr); #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; + build_ipv4_addr(local_addr, ¶m->localaddr); + build_ipv4_addr(rem_addr, ¶m->remaddr); } + return 0; +} - if (num < 10) { - bb_error_msg("warning, got bogus raw line."); - return; +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 *) ¶m->localaddr, param->local_port, + proto, flags & NETSTAT_NUMERIC); + char *r = ip_port_str( + (struct sockaddr *) ¶m->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); } - state_str=itoa(state); - -#ifdef CONFIG_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)) +} + +static int FAST_FUNC tcp_do_one(char *line) +{ + struct inet_params param; + + if (scan_inet_proc_line(¶m, line)) + return 1; + + print_inet_line(¶m, 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 - 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); +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(¶m, 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(¶m, state_str, "udp", have_remaddr); + return 0; } -#define HAS_INODE 1 +static int FAST_FUNC raw_do_one(char *line) +{ + int have_remaddr; + struct inet_params param; + + if (scan_inet_proc_line(¶m, line)) + return 1; -static void unix_do_one(int nr, const char *line) + have_remaddr = notnull(param.remaddr); + print_inet_line(¶m, itoa(param.state), "raw", have_remaddr); + return 0; +} + +static int FAST_FUNC unix_do_one(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); + 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) { - bb_error_msg("warning, got bogus unix line."); - return; + return 1; /* error */ } - if (!(has & HAS_INODE)) - snprintf(path,sizeof(path),"%d",inode); - - if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))!=(NETSTAT_LISTENING|NETSTAT_CONNECTED)) { + if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) { if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) { - if (!(flags&NETSTAT_LISTENING)) - return; + if (!(flags & NETSTAT_LISTENING)) + return 0; } else { - if (!(flags&NETSTAT_CONNECTED)) - return; + if (!(flags & NETSTAT_CONNECTED)) + return 0; } } @@ -438,7 +517,6 @@ static void unix_do_one(int nr, const char *line) case 0: ss_proto = "unix"; break; - default: ss_proto = "??"; } @@ -447,23 +525,18 @@ static void unix_do_one(int nr, const char *line) 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"; } @@ -472,7 +545,6 @@ static void unix_do_one(int nr, const char *line) case SS_FREE: ss_state = "FREE"; break; - case SS_UNCONNECTED: /* * Unconnected sockets may be listening @@ -484,19 +556,15 @@ static void unix_do_one(int nr, const char *line) 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"; } @@ -508,154 +576,137 @@ static void unix_do_one(int nr, const char *line) 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); -} + printf("%-5s %-6ld %-11s %-10s %-13s %6lu ", + ss_proto, refcnt, ss_flags, ss_type, ss_state, inode + ); -#define _PATH_PROCNET_UDP "/proc/net/udp" -#define _PATH_PROCNET_UDP6 "/proc/net/udp6" -#define _PATH_PROCNET_TCP "/proc/net/tcp" -#define _PATH_PROCNET_TCP6 "/proc/net/tcp6" -#define _PATH_PROCNET_RAW "/proc/net/raw" -#define _PATH_PROCNET_RAW6 "/proc/net/raw6" -#define _PATH_PROCNET_UNIX "/proc/net/unix" +#if ENABLE_FEATURE_NETSTAT_PRG + if (option_mask32 & OPT_prg) + printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode)); +#endif -static void do_info(const char *file, const char *name, void (*proc)(int, const char *)) + /* 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 *)) { - char buffer[8192]; - int lnr = 0; + int lnr; FILE *procinfo; + char *buffer; - procinfo = fopen(file, "r"); + /* _stdin is just to save "r" param */ + procinfo = fopen_or_warn_stdin(file); if (procinfo == NULL) { - if (errno != ENOENT) { - perror(file); - } else { - bb_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); + 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); } -/* - * Our main function. - */ - -int netstat_main(int argc, char **argv) +int netstat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int netstat_main(int argc UNUSED_PARAM, char **argv) { - int opt; - int new_flags=0; - int showroute = 0, extended = 0; -#ifdef CONFIG_FEATURE_IPV6 - int inet=1; - int inet6=1; + 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 -# define inet 1 -# define inet6 0 + bb_show_usage(); #endif - 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: - bb_show_usage(); - } - if ( showroute ) { -#ifdef CONFIG_ROUTE - displayroutes ( flags & NETSTAT_NUMERIC, !extended ); - return 0; -#else - bb_error_msg_and_die( "-r (display routing table) is not compiled in." ); + } + 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 - } - - if (new_flags) { - flags &= ~(NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX); - flags |= new_flags; + + opt &= NETSTAT_ALLPROTO; + if (opt) { + flags &= ~NETSTAT_ALLPROTO; + flags |= opt; } - if (flags&(NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) { + if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) { printf("Active Internet connections "); /* xxx */ - if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED)) + 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"); + 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 (inet && flags&NETSTAT_TCP) - do_info(_PATH_PROCNET_TCP,"AF INET (tcp)",tcp_do_one); -#ifdef CONFIG_FEATURE_IPV6 - if (inet6 && flags&NETSTAT_TCP) - do_info(_PATH_PROCNET_TCP6,"AF INET6 (tcp)",tcp_do_one); + 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 (inet && flags&NETSTAT_UDP) - do_info(_PATH_PROCNET_UDP,"AF INET (udp)",udp_do_one); -#ifdef CONFIG_FEATURE_IPV6 - if (inet6 && flags&NETSTAT_UDP) - do_info(_PATH_PROCNET_UDP6,"AF INET6 (udp)",udp_do_one); + } + 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 (inet && flags&NETSTAT_RAW) - do_info(_PATH_PROCNET_RAW,"AF INET (raw)",raw_do_one); -#ifdef CONFIG_FEATURE_IPV6 - if (inet6 && flags&NETSTAT_RAW) - do_info(_PATH_PROCNET_RAW6,"AF INET6 (raw)",raw_do_one); + } + 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) { + } + if (flags & NETSTAT_UNIX) { printf("Active UNIX domain sockets "); - if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED)) + 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); + 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; } |