Home | History | Annotate | Download | only in toolbox
      1 /*
      2  * Copyright (c) 2008, The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *  * Neither the name of Google, Inc. nor the names of its contributors
     15  *    may be used to endorse or promote products derived from this
     16  *    software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     22  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     25  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     28  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <arpa/inet.h>
     33 #include <stdio.h>
     34 #include <stdlib.h>
     35 #include <sys/socket.h>
     36 #include <sys/types.h>
     37 
     38 typedef union iaddr iaddr;
     39 typedef union iaddr6 iaddr6;
     40 
     41 union iaddr {
     42     unsigned u;
     43     unsigned char b[4];
     44 };
     45 
     46 union iaddr6 {
     47     struct {
     48         unsigned a;
     49         unsigned b;
     50         unsigned c;
     51         unsigned d;
     52     } u;
     53     unsigned char b[16];
     54 };
     55 
     56 static const char *state2str(unsigned state)
     57 {
     58     switch(state){
     59     case 0x1: return "ESTABLISHED";
     60     case 0x2: return "SYN_SENT";
     61     case 0x3: return "SYN_RECV";
     62     case 0x4: return "FIN_WAIT1";
     63     case 0x5: return "FIN_WAIT2";
     64     case 0x6: return "TIME_WAIT";
     65     case 0x7: return "CLOSE";
     66     case 0x8: return "CLOSE_WAIT";
     67     case 0x9: return "LAST_ACK";
     68     case 0xA: return "LISTEN";
     69     case 0xB: return "CLOSING";
     70     default: return "UNKNOWN";
     71     }
     72 }
     73 
     74 /* addr + : + port + \0 */
     75 #define ADDR_LEN INET6_ADDRSTRLEN + 1 + 5 + 1
     76 
     77 static void addr2str(int af, const void *addr, unsigned port, char *buf)
     78 {
     79     if (inet_ntop(af, addr, buf, ADDR_LEN) == NULL) {
     80         *buf = '\0';
     81         return;
     82     }
     83     size_t len = strlen(buf);
     84     if (port) {
     85         snprintf(buf+len, ADDR_LEN-len, ":%d", port);
     86     } else {
     87         strncat(buf+len, ":*", ADDR_LEN-len-1);
     88     }
     89 }
     90 
     91 static void ipv4(const char *filename, const char *label) {
     92     FILE *fp = fopen(filename, "r");
     93     if (fp == NULL) {
     94         return;
     95     }
     96     char buf[BUFSIZ];
     97     fgets(buf, BUFSIZ, fp);
     98     while (fgets(buf, BUFSIZ, fp)){
     99         char lip[ADDR_LEN];
    100         char rip[ADDR_LEN];
    101         iaddr laddr, raddr;
    102         unsigned lport, rport, state, txq, rxq, num;
    103         int n = sscanf(buf, " %d: %x:%x %x:%x %x %x:%x",
    104                        &num, &laddr.u, &lport, &raddr.u, &rport,
    105                        &state, &txq, &rxq);
    106         if (n == 8) {
    107             addr2str(AF_INET, &laddr, lport, lip);
    108             addr2str(AF_INET, &raddr, rport, rip);
    109 
    110             printf("%4s  %6d %6d %-22s %-22s %s\n",
    111                    label, rxq, txq, lip, rip,
    112                    state2str(state));
    113         }
    114     }
    115     fclose(fp);
    116 }
    117 
    118 static void ipv6(const char *filename, const char *label) {
    119     FILE *fp = fopen(filename, "r");
    120     if (fp == NULL) {
    121         return;
    122     }
    123     char buf[BUFSIZ];
    124     fgets(buf, BUFSIZ, fp);
    125     while (fgets(buf, BUFSIZ, fp)){
    126         char lip[ADDR_LEN];
    127         char rip[ADDR_LEN];
    128         iaddr6 laddr6, raddr6;
    129         unsigned lport, rport, state, txq, rxq, num;
    130         int n = sscanf(buf, " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x",
    131                        &num, &laddr6.u.a, &laddr6.u.b, &laddr6.u.c, &laddr6.u.d, &lport,
    132                        &raddr6.u.a, &raddr6.u.b, &raddr6.u.c, &raddr6.u.d, &rport,
    133                        &state, &txq, &rxq);
    134         if (n == 14) {
    135             addr2str(AF_INET6, &laddr6, lport, lip);
    136             addr2str(AF_INET6, &raddr6, rport, rip);
    137 
    138             printf("%4s  %6d %6d %-22s %-22s %s\n",
    139                    label, rxq, txq, lip, rip,
    140                    state2str(state));
    141         }
    142     }
    143     fclose(fp);
    144 }
    145 
    146 int netstat_main(int argc, char *argv[])
    147 {
    148     printf("Proto Recv-Q Send-Q Local Address          Foreign Address        State\n");
    149     ipv4("/proc/net/tcp",  "tcp");
    150     ipv4("/proc/net/udp",  "udp");
    151     ipv6("/proc/net/tcp6", "tcp6");
    152     ipv6("/proc/net/udp6", "udp6");
    153     return 0;
    154 }
    155