[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini netstat implementation(s) for busybox
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| 4 | * based in part on the netstat implementation from net-tools.
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| 5 | *
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| 6 | * Copyright (C) 2002 by Bart Visscher <magick@linux-fan.com>
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| 7 | *
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| 8 | * 2002-04-20
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| 9 | * IPV6 support added by Bart Visscher <magick@linux-fan.com>
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[1765] | 10 | *
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| 11 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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[821] | 12 | */
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| 13 |
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[1765] | 14 | #include "libbb.h"
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[821] | 15 | #include "inet_common.h"
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| 16 |
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[1765] | 17 | enum {
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| 18 | OPT_extended = 0x4,
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| 19 | OPT_showroute = 0x100,
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| 20 | OPT_widedisplay = 0x200 * ENABLE_FEATURE_NETSTAT_WIDE,
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| 21 | };
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| 22 | # define NETSTAT_OPTS "laentuwxr"USE_FEATURE_NETSTAT_WIDE("W")
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[821] | 23 |
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[1765] | 24 | #define NETSTAT_CONNECTED 0x01
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| 25 | #define NETSTAT_LISTENING 0x02
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| 26 | #define NETSTAT_NUMERIC 0x04
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| 27 | /* Must match getopt32 option string */
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| 28 | #define NETSTAT_TCP 0x10
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| 29 | #define NETSTAT_UDP 0x20
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| 30 | #define NETSTAT_RAW 0x40
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| 31 | #define NETSTAT_UNIX 0x80
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| 32 | #define NETSTAT_ALLPROTO (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX)
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[821] | 33 |
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[1765] | 34 | static smallint flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO;
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[821] | 35 |
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| 36 | enum {
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[1765] | 37 | TCP_ESTABLISHED = 1,
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| 38 | TCP_SYN_SENT,
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| 39 | TCP_SYN_RECV,
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| 40 | TCP_FIN_WAIT1,
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| 41 | TCP_FIN_WAIT2,
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| 42 | TCP_TIME_WAIT,
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| 43 | TCP_CLOSE,
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| 44 | TCP_CLOSE_WAIT,
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| 45 | TCP_LAST_ACK,
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| 46 | TCP_LISTEN,
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| 47 | TCP_CLOSING /* now a valid state */
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[821] | 48 | };
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| 49 |
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[1765] | 50 | static const char *const tcp_state[] = {
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| 51 | "",
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| 52 | "ESTABLISHED",
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| 53 | "SYN_SENT",
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| 54 | "SYN_RECV",
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| 55 | "FIN_WAIT1",
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| 56 | "FIN_WAIT2",
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| 57 | "TIME_WAIT",
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| 58 | "CLOSE",
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| 59 | "CLOSE_WAIT",
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| 60 | "LAST_ACK",
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| 61 | "LISTEN",
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| 62 | "CLOSING"
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[821] | 63 | };
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| 64 |
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| 65 | typedef enum {
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[1765] | 66 | SS_FREE = 0, /* not allocated */
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| 67 | SS_UNCONNECTED, /* unconnected to any socket */
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| 68 | SS_CONNECTING, /* in process of connecting */
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| 69 | SS_CONNECTED, /* connected to socket */
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| 70 | SS_DISCONNECTING /* in process of disconnecting */
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[821] | 71 | } socket_state;
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| 72 |
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[1765] | 73 | #define SO_ACCEPTCON (1<<16) /* performed a listen */
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| 74 | #define SO_WAITDATA (1<<17) /* wait data to read */
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| 75 | #define SO_NOSPACE (1<<18) /* no space to write */
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[821] | 76 |
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[1765] | 77 | /* Standard printout size */
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| 78 | #define PRINT_IP_MAX_SIZE 23
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| 79 | #define PRINT_NET_CONN "%s %6ld %6ld %-23s %-23s %-12s\n"
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| 80 | #define PRINT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-23s %-23s State\n"
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| 81 |
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| 82 | /* When there are IPv6 connections the IPv6 addresses will be
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| 83 | * truncated to none-recognition. The '-W' option makes the
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| 84 | * address columns wide enough to accomodate for longest possible
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| 85 | * IPv6 addresses, i.e. addresses of the form
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| 86 | * xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:ddd.ddd.ddd.ddd
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| 87 | */
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| 88 | #define PRINT_IP_MAX_SIZE_WIDE 51 /* INET6_ADDRSTRLEN + 5 for the port number */
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| 89 | #define PRINT_NET_CONN_WIDE "%s %6ld %6ld %-51s %-51s %-12s\n"
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| 90 | #define PRINT_NET_CONN_HEADER_WIDE "\nProto Recv-Q Send-Q %-51s %-51s State\n"
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| 91 |
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| 92 | static const char *net_conn_line = PRINT_NET_CONN;
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| 93 |
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| 94 |
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| 95 | #if ENABLE_FEATURE_IPV6
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| 96 | static void build_ipv6_addr(char* local_addr, struct sockaddr_in6* localaddr)
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[821] | 97 | {
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[1765] | 98 | char addr6[INET6_ADDRSTRLEN];
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| 99 | struct in6_addr in6;
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| 100 |
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| 101 | sscanf(local_addr, "%08X%08X%08X%08X",
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| 102 | &in6.s6_addr32[0], &in6.s6_addr32[1],
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| 103 | &in6.s6_addr32[2], &in6.s6_addr32[3]);
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| 104 | inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
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| 105 | inet_pton(AF_INET6, addr6, (struct sockaddr *) &localaddr->sin6_addr);
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| 106 |
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| 107 | localaddr->sin6_family = AF_INET6;
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[821] | 108 | }
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[1765] | 109 | #endif
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[821] | 110 |
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[1765] | 111 | #if ENABLE_FEATURE_IPV6
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| 112 | static void build_ipv4_addr(char* local_addr, struct sockaddr_in6* localaddr)
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| 113 | #else
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| 114 | static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr)
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| 115 | #endif
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[821] | 116 | {
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[1765] | 117 | sscanf(local_addr, "%X",
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| 118 | &((struct sockaddr_in *) localaddr)->sin_addr.s_addr);
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| 119 | ((struct sockaddr *) localaddr)->sa_family = AF_INET;
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| 120 | }
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| 121 |
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| 122 | static const char *get_sname(int port, const char *proto, int numeric)
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| 123 | {
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| 124 | if (!port)
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| 125 | return "*";
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| 126 | if (!numeric) {
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| 127 | struct servent *se = getservbyport(port, proto);
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[821] | 128 | if (se)
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[1765] | 129 | return se->s_name;
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[821] | 130 | }
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[1765] | 131 | /* hummm, we may return static buffer here!! */
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| 132 | return itoa(ntohs(port));
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[821] | 133 | }
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| 134 |
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[1765] | 135 | static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric)
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[821] | 136 | {
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[1765] | 137 | enum { salen = USE_FEATURE_IPV6(sizeof(struct sockaddr_in6)) SKIP_FEATURE_IPV6(sizeof(struct sockaddr_in)) };
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| 138 | char *host, *host_port;
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[821] | 139 |
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[1765] | 140 | /* Code which used "*" for INADDR_ANY is removed: it's ambiguous in IPv6,
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| 141 | * while "0.0.0.0" is not. */
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| 142 |
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| 143 | host = numeric ? xmalloc_sockaddr2dotted_noport(addr)
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| 144 | : xmalloc_sockaddr2host_noport(addr);
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| 145 |
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| 146 | host_port = xasprintf("%s:%s", host, get_sname(htons(port), proto, numeric));
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| 147 | free(host);
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| 148 | return host_port;
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[821] | 149 | }
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| 150 |
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| 151 | static void tcp_do_one(int lnr, const char *line)
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| 152 | {
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| 153 | char local_addr[64], rem_addr[64];
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| 154 | char more[512];
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| 155 | int num, local_port, rem_port, d, state, timer_run, uid, timeout;
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[1765] | 156 | #if ENABLE_FEATURE_IPV6
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[821] | 157 | struct sockaddr_in6 localaddr, remaddr;
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| 158 | #else
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| 159 | struct sockaddr_in localaddr, remaddr;
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| 160 | #endif
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| 161 | unsigned long rxq, txq, time_len, retr, inode;
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| 162 |
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| 163 | if (lnr == 0)
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| 164 | return;
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| 165 |
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| 166 | more[0] = '\0';
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| 167 | num = sscanf(line,
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[1765] | 168 | "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
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| 169 | &d, local_addr, &local_port,
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| 170 | rem_addr, &rem_port, &state,
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| 171 | &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
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[821] | 172 |
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| 173 | if (strlen(local_addr) > 8) {
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[1765] | 174 | #if ENABLE_FEATURE_IPV6
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| 175 | build_ipv6_addr(local_addr, &localaddr);
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| 176 | build_ipv6_addr(rem_addr, &remaddr);
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[821] | 177 | #endif
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| 178 | } else {
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[1765] | 179 | build_ipv4_addr(local_addr, &localaddr);
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| 180 | build_ipv4_addr(rem_addr, &remaddr);
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[821] | 181 | }
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| 182 |
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| 183 | if (num < 10) {
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[1765] | 184 | bb_error_msg("warning, got bogus tcp line");
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[821] | 185 | return;
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| 186 | }
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| 187 |
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[1765] | 188 | if ((rem_port && (flags & NETSTAT_CONNECTED))
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| 189 | || (!rem_port && (flags & NETSTAT_LISTENING))
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| 190 | ) {
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| 191 | char *l = ip_port_str(
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| 192 | (struct sockaddr *) &localaddr, local_port,
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| 193 | "tcp", flags & NETSTAT_NUMERIC);
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| 194 | char *r = ip_port_str(
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| 195 | (struct sockaddr *) &remaddr, rem_port,
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| 196 | "tcp", flags & NETSTAT_NUMERIC);
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| 197 | printf(net_conn_line,
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| 198 | "tcp", rxq, txq, l, r, tcp_state[state]);
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| 199 | free(l);
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| 200 | free(r);
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[821] | 201 | }
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| 202 | }
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| 203 |
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| 204 | static void udp_do_one(int lnr, const char *line)
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| 205 | {
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| 206 | char local_addr[64], rem_addr[64];
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[1765] | 207 | const char *state_str;
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| 208 | char more[512];
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[821] | 209 | int num, local_port, rem_port, d, state, timer_run, uid, timeout;
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[1765] | 210 | #if ENABLE_FEATURE_IPV6
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[821] | 211 | struct sockaddr_in6 localaddr, remaddr;
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| 212 | #else
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| 213 | struct sockaddr_in localaddr, remaddr;
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| 214 | #endif
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| 215 | unsigned long rxq, txq, time_len, retr, inode;
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| 216 |
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| 217 | if (lnr == 0)
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| 218 | return;
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| 219 |
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| 220 | more[0] = '\0';
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| 221 | num = sscanf(line,
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[1765] | 222 | "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
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| 223 | &d, local_addr, &local_port,
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| 224 | rem_addr, &rem_port, &state,
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| 225 | &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
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[821] | 226 |
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| 227 | if (strlen(local_addr) > 8) {
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[1765] | 228 | #if ENABLE_FEATURE_IPV6
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| 229 | /* Demangle what the kernel gives us */
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| 230 | build_ipv6_addr(local_addr, &localaddr);
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| 231 | build_ipv6_addr(rem_addr, &remaddr);
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[821] | 232 | #endif
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| 233 | } else {
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[1765] | 234 | build_ipv4_addr(local_addr, &localaddr);
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| 235 | build_ipv4_addr(rem_addr, &remaddr);
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[821] | 236 | }
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| 237 |
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| 238 | if (num < 10) {
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[1765] | 239 | bb_error_msg("warning, got bogus udp line");
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[821] | 240 | return;
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| 241 | }
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| 242 | switch (state) {
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| 243 | case TCP_ESTABLISHED:
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| 244 | state_str = "ESTABLISHED";
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| 245 | break;
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| 246 | case TCP_CLOSE:
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| 247 | state_str = "";
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| 248 | break;
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| 249 | default:
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| 250 | state_str = "UNKNOWN";
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| 251 | break;
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| 252 | }
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| 253 |
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[1765] | 254 | #if ENABLE_FEATURE_IPV6
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| 255 | # define notnull(A) ( \
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| 256 | ( (A.sin6_family == AF_INET6) \
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| 257 | && (A.sin6_addr.s6_addr32[0] | A.sin6_addr.s6_addr32[1] | \
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| 258 | A.sin6_addr.s6_addr32[2] | A.sin6_addr.s6_addr32[3]) \
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| 259 | ) || ( \
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| 260 | (A.sin6_family == AF_INET) \
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| 261 | && ((struct sockaddr_in*)&A)->sin_addr.s_addr \
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| 262 | ) \
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| 263 | )
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[821] | 264 | #else
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| 265 | # define notnull(A) (A.sin_addr.s_addr)
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| 266 | #endif
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| 267 | {
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[1765] | 268 | int have_remaddr = notnull(remaddr);
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| 269 | if ((have_remaddr && (flags & NETSTAT_CONNECTED))
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| 270 | || (!have_remaddr && (flags & NETSTAT_LISTENING))
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| 271 | ) {
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| 272 | char *l = ip_port_str(
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| 273 | (struct sockaddr *) &localaddr, local_port,
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| 274 | "udp", flags & NETSTAT_NUMERIC);
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| 275 | char *r = ip_port_str(
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| 276 | (struct sockaddr *) &remaddr, rem_port,
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| 277 | "udp", flags & NETSTAT_NUMERIC);
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| 278 | printf(net_conn_line,
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| 279 | "udp", rxq, txq, l, r, state_str);
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| 280 | free(l);
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| 281 | free(r);
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| 282 | }
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[821] | 283 | }
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| 284 | }
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| 285 |
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| 286 | static void raw_do_one(int lnr, const char *line)
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| 287 | {
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| 288 | char local_addr[64], rem_addr[64];
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[1765] | 289 | char more[512];
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[821] | 290 | int num, local_port, rem_port, d, state, timer_run, uid, timeout;
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[1765] | 291 | #if ENABLE_FEATURE_IPV6
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[821] | 292 | struct sockaddr_in6 localaddr, remaddr;
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| 293 | #else
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| 294 | struct sockaddr_in localaddr, remaddr;
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| 295 | #endif
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| 296 | unsigned long rxq, txq, time_len, retr, inode;
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| 297 |
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| 298 | if (lnr == 0)
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| 299 | return;
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| 300 |
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| 301 | more[0] = '\0';
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| 302 | num = sscanf(line,
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[1765] | 303 | "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
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| 304 | &d, local_addr, &local_port,
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| 305 | rem_addr, &rem_port, &state,
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| 306 | &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
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[821] | 307 |
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| 308 | if (strlen(local_addr) > 8) {
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[1765] | 309 | #if ENABLE_FEATURE_IPV6
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| 310 | build_ipv6_addr(local_addr, &localaddr);
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| 311 | build_ipv6_addr(rem_addr, &remaddr);
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[821] | 312 | #endif
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| 313 | } else {
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[1765] | 314 | build_ipv4_addr(local_addr, &localaddr);
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| 315 | build_ipv4_addr(rem_addr, &remaddr);
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[821] | 316 | }
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| 317 |
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| 318 | if (num < 10) {
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[1765] | 319 | bb_error_msg("warning, got bogus raw line");
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[821] | 320 | return;
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| 321 | }
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| 322 |
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| 323 | {
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[1765] | 324 | int have_remaddr = notnull(remaddr);
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| 325 | if ((have_remaddr && (flags & NETSTAT_CONNECTED))
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| 326 | || (!have_remaddr && (flags & NETSTAT_LISTENING))
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| 327 | ) {
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| 328 | char *l = ip_port_str(
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| 329 | (struct sockaddr *) &localaddr, local_port,
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| 330 | "raw", flags & NETSTAT_NUMERIC);
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| 331 | char *r = ip_port_str(
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| 332 | (struct sockaddr *) &remaddr, rem_port,
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| 333 | "raw", flags & NETSTAT_NUMERIC);
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| 334 | printf(net_conn_line,
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| 335 | "raw", rxq, txq, l, r, itoa(state));
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| 336 | free(l);
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| 337 | free(r);
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| 338 | }
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[821] | 339 | }
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| 340 | }
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| 341 |
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| 342 | static void unix_do_one(int nr, const char *line)
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| 343 | {
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[1765] | 344 | static smallint has_inode = 0;
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| 345 |
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[821] | 346 | char path[PATH_MAX], ss_flags[32];
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[1765] | 347 | const char *ss_proto, *ss_state, *ss_type;
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[821] | 348 | int num, state, type, inode;
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| 349 | void *d;
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| 350 | unsigned long refcnt, proto, unix_flags;
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| 351 |
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| 352 | if (nr == 0) {
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| 353 | if (strstr(line, "Inode"))
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[1765] | 354 | has_inode = 1;
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[821] | 355 | return;
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| 356 | }
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| 357 | path[0] = '\0';
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| 358 | num = sscanf(line, "%p: %lX %lX %lX %X %X %d %s",
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[1765] | 359 | &d, &refcnt, &proto, &unix_flags, &type, &state, &inode, path);
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[821] | 360 | if (num < 6) {
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[1765] | 361 | bb_error_msg("warning, got bogus unix line");
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[821] | 362 | return;
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| 363 | }
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[1765] | 364 | if (!has_inode)
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| 365 | sprintf(path, "%d", inode);
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[821] | 366 |
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[1765] | 367 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
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[821] | 368 | if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
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[1765] | 369 | if (!(flags & NETSTAT_LISTENING))
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[821] | 370 | return;
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| 371 | } else {
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[1765] | 372 | if (!(flags & NETSTAT_CONNECTED))
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[821] | 373 | return;
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| 374 | }
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| 375 | }
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| 376 |
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| 377 | switch (proto) {
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| 378 | case 0:
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| 379 | ss_proto = "unix";
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| 380 | break;
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| 381 | default:
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| 382 | ss_proto = "??";
|
---|
| 383 | }
|
---|
| 384 |
|
---|
| 385 | switch (type) {
|
---|
| 386 | case SOCK_STREAM:
|
---|
| 387 | ss_type = "STREAM";
|
---|
| 388 | break;
|
---|
| 389 | case SOCK_DGRAM:
|
---|
| 390 | ss_type = "DGRAM";
|
---|
| 391 | break;
|
---|
| 392 | case SOCK_RAW:
|
---|
| 393 | ss_type = "RAW";
|
---|
| 394 | break;
|
---|
| 395 | case SOCK_RDM:
|
---|
| 396 | ss_type = "RDM";
|
---|
| 397 | break;
|
---|
| 398 | case SOCK_SEQPACKET:
|
---|
| 399 | ss_type = "SEQPACKET";
|
---|
| 400 | break;
|
---|
| 401 | default:
|
---|
| 402 | ss_type = "UNKNOWN";
|
---|
| 403 | }
|
---|
| 404 |
|
---|
| 405 | switch (state) {
|
---|
| 406 | case SS_FREE:
|
---|
| 407 | ss_state = "FREE";
|
---|
| 408 | break;
|
---|
| 409 | case SS_UNCONNECTED:
|
---|
| 410 | /*
|
---|
| 411 | * Unconnected sockets may be listening
|
---|
| 412 | * for something.
|
---|
| 413 | */
|
---|
| 414 | if (unix_flags & SO_ACCEPTCON) {
|
---|
| 415 | ss_state = "LISTENING";
|
---|
| 416 | } else {
|
---|
| 417 | ss_state = "";
|
---|
| 418 | }
|
---|
| 419 | break;
|
---|
| 420 | case SS_CONNECTING:
|
---|
| 421 | ss_state = "CONNECTING";
|
---|
| 422 | break;
|
---|
| 423 | case SS_CONNECTED:
|
---|
| 424 | ss_state = "CONNECTED";
|
---|
| 425 | break;
|
---|
| 426 | case SS_DISCONNECTING:
|
---|
| 427 | ss_state = "DISCONNECTING";
|
---|
| 428 | break;
|
---|
| 429 | default:
|
---|
| 430 | ss_state = "UNKNOWN";
|
---|
| 431 | }
|
---|
| 432 |
|
---|
| 433 | strcpy(ss_flags, "[ ");
|
---|
| 434 | if (unix_flags & SO_ACCEPTCON)
|
---|
| 435 | strcat(ss_flags, "ACC ");
|
---|
| 436 | if (unix_flags & SO_WAITDATA)
|
---|
| 437 | strcat(ss_flags, "W ");
|
---|
| 438 | if (unix_flags & SO_NOSPACE)
|
---|
| 439 | strcat(ss_flags, "N ");
|
---|
| 440 | strcat(ss_flags, "]");
|
---|
| 441 |
|
---|
| 442 | printf("%-5s %-6ld %-11s %-10s %-13s ",
|
---|
| 443 | ss_proto, refcnt, ss_flags, ss_type, ss_state);
|
---|
[1765] | 444 | if (has_inode)
|
---|
| 445 | printf("%-6d ", inode);
|
---|
[821] | 446 | else
|
---|
| 447 | printf("- ");
|
---|
| 448 | puts(path);
|
---|
| 449 | }
|
---|
| 450 |
|
---|
| 451 | #define _PATH_PROCNET_UDP "/proc/net/udp"
|
---|
| 452 | #define _PATH_PROCNET_UDP6 "/proc/net/udp6"
|
---|
| 453 | #define _PATH_PROCNET_TCP "/proc/net/tcp"
|
---|
| 454 | #define _PATH_PROCNET_TCP6 "/proc/net/tcp6"
|
---|
| 455 | #define _PATH_PROCNET_RAW "/proc/net/raw"
|
---|
| 456 | #define _PATH_PROCNET_RAW6 "/proc/net/raw6"
|
---|
| 457 | #define _PATH_PROCNET_UNIX "/proc/net/unix"
|
---|
| 458 |
|
---|
| 459 | static void do_info(const char *file, const char *name, void (*proc)(int, const char *))
|
---|
| 460 | {
|
---|
| 461 | int lnr = 0;
|
---|
| 462 | FILE *procinfo;
|
---|
| 463 |
|
---|
| 464 | procinfo = fopen(file, "r");
|
---|
| 465 | if (procinfo == NULL) {
|
---|
| 466 | if (errno != ENOENT) {
|
---|
[1765] | 467 | bb_perror_msg("%s", file);
|
---|
[821] | 468 | } else {
|
---|
[1765] | 469 | bb_error_msg("no support for '%s' on this system", name);
|
---|
[821] | 470 | }
|
---|
[1765] | 471 | return;
|
---|
[821] | 472 | }
|
---|
[1765] | 473 | do {
|
---|
| 474 | char *buffer = xmalloc_fgets(procinfo);
|
---|
| 475 | if (buffer) {
|
---|
| 476 | (proc)(lnr++, buffer);
|
---|
| 477 | free(buffer);
|
---|
| 478 | }
|
---|
| 479 | } while (!feof(procinfo));
|
---|
| 480 | fclose(procinfo);
|
---|
[821] | 481 | }
|
---|
| 482 |
|
---|
| 483 | /*
|
---|
| 484 | * Our main function.
|
---|
| 485 | */
|
---|
| 486 |
|
---|
[1765] | 487 | int netstat_main(int argc, char **argv);
|
---|
[821] | 488 | int netstat_main(int argc, char **argv)
|
---|
| 489 | {
|
---|
[1765] | 490 | const char *net_conn_line_header = PRINT_NET_CONN_HEADER;
|
---|
| 491 | unsigned opt;
|
---|
| 492 | #if ENABLE_FEATURE_IPV6
|
---|
| 493 | smallint inet = 1;
|
---|
| 494 | smallint inet6 = 1;
|
---|
[821] | 495 | #else
|
---|
[1765] | 496 | enum { inet = 1, inet6 = 0 };
|
---|
[821] | 497 | #endif
|
---|
[1765] | 498 |
|
---|
| 499 | /* Option string must match NETSTAT_xxx constants */
|
---|
| 500 | opt = getopt32(argv, NETSTAT_OPTS);
|
---|
| 501 | if (opt & 0x1) { // -l
|
---|
| 502 | flags &= ~NETSTAT_CONNECTED;
|
---|
| 503 | flags |= NETSTAT_LISTENING;
|
---|
| 504 | }
|
---|
| 505 | if (opt & 0x2) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a
|
---|
| 506 | //if (opt & 0x4) // -e
|
---|
| 507 | if (opt & 0x8) flags |= NETSTAT_NUMERIC; // -n
|
---|
| 508 | //if (opt & 0x10) // -t: NETSTAT_TCP
|
---|
| 509 | //if (opt & 0x20) // -u: NETSTAT_UDP
|
---|
| 510 | //if (opt & 0x40) // -w: NETSTAT_RAW
|
---|
| 511 | //if (opt & 0x80) // -x: NETSTAT_UNIX
|
---|
| 512 | if (opt & OPT_showroute) { // -r
|
---|
| 513 | #if ENABLE_ROUTE
|
---|
| 514 | bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
|
---|
[821] | 515 | return 0;
|
---|
| 516 | #else
|
---|
[1765] | 517 | bb_show_usage();
|
---|
[821] | 518 | #endif
|
---|
| 519 | }
|
---|
| 520 |
|
---|
[1765] | 521 | if (opt & OPT_widedisplay) { // -W
|
---|
| 522 | net_conn_line = PRINT_NET_CONN_WIDE;
|
---|
| 523 | net_conn_line_header = PRINT_NET_CONN_HEADER_WIDE;
|
---|
[821] | 524 | }
|
---|
[1765] | 525 |
|
---|
| 526 | opt &= NETSTAT_ALLPROTO;
|
---|
| 527 | if (opt) {
|
---|
| 528 | flags &= ~NETSTAT_ALLPROTO;
|
---|
| 529 | flags |= opt;
|
---|
| 530 | }
|
---|
| 531 | if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) {
|
---|
[821] | 532 | printf("Active Internet connections "); /* xxx */
|
---|
| 533 |
|
---|
[1765] | 534 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
|
---|
[821] | 535 | printf("(servers and established)");
|
---|
[1765] | 536 | else if (flags & NETSTAT_LISTENING)
|
---|
| 537 | printf("(only servers)");
|
---|
| 538 | else
|
---|
| 539 | printf("(w/o servers)");
|
---|
| 540 | printf(net_conn_line_header, "Local Address", "Foreign Address");
|
---|
[821] | 541 | }
|
---|
[1765] | 542 | if (inet && flags & NETSTAT_TCP)
|
---|
| 543 | do_info(_PATH_PROCNET_TCP, "AF INET (tcp)", tcp_do_one);
|
---|
| 544 | #if ENABLE_FEATURE_IPV6
|
---|
| 545 | if (inet6 && flags & NETSTAT_TCP)
|
---|
| 546 | do_info(_PATH_PROCNET_TCP6, "AF INET6 (tcp)", tcp_do_one);
|
---|
[821] | 547 | #endif
|
---|
[1765] | 548 | if (inet && flags & NETSTAT_UDP)
|
---|
| 549 | do_info(_PATH_PROCNET_UDP, "AF INET (udp)", udp_do_one);
|
---|
| 550 | #if ENABLE_FEATURE_IPV6
|
---|
| 551 | if (inet6 && flags & NETSTAT_UDP)
|
---|
| 552 | do_info(_PATH_PROCNET_UDP6, "AF INET6 (udp)", udp_do_one);
|
---|
[821] | 553 | #endif
|
---|
[1765] | 554 | if (inet && flags & NETSTAT_RAW)
|
---|
| 555 | do_info(_PATH_PROCNET_RAW, "AF INET (raw)", raw_do_one);
|
---|
| 556 | #if ENABLE_FEATURE_IPV6
|
---|
| 557 | if (inet6 && flags & NETSTAT_RAW)
|
---|
| 558 | do_info(_PATH_PROCNET_RAW6, "AF INET6 (raw)", raw_do_one);
|
---|
[821] | 559 | #endif
|
---|
[1765] | 560 | if (flags & NETSTAT_UNIX) {
|
---|
[821] | 561 | printf("Active UNIX domain sockets ");
|
---|
[1765] | 562 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
|
---|
[821] | 563 | printf("(servers and established)");
|
---|
[1765] | 564 | else if (flags & NETSTAT_LISTENING)
|
---|
| 565 | printf("(only servers)");
|
---|
| 566 | else
|
---|
| 567 | printf("(w/o servers)");
|
---|
[821] | 568 | printf("\nProto RefCnt Flags Type State I-Node Path\n");
|
---|
[1765] | 569 | do_info(_PATH_PROCNET_UNIX, "AF UNIX", unix_do_one);
|
---|
[821] | 570 | }
|
---|
| 571 | return 0;
|
---|
| 572 | }
|
---|