root/net/ipv4/proc.c

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DEFINITIONS

This source file includes following definitions.
  1. get__netinfo
  2. tcp_get_info
  3. udp_get_info
  4. raw_get_info
  5. afinet_get_info
  6. snmp_get_info

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              This file implements the various access functions for the
   7  *              PROC file system.  It is mainly used for debugging and
   8  *              statistics.
   9  *
  10  * Version:     @(#)proc.c      1.0.5   05/27/93
  11  *
  12  * Authors:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  13  *              Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
  14  *              Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
  15  *              Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
  16  *
  17  * Fixes:
  18  *              Alan Cox        :       UDP sockets show the rxqueue/txqueue
  19  *                                      using hint flag for the netinfo.
  20  *      Pauline Middelink       :       identd support
  21  *              Alan Cox        :       Make /proc safer.
  22  *      Erik Schoenfelder       :       /proc/net/snmp
  23  *              Alan Cox        :       Handle dead sockets properly.
  24  *      Gerhard Koerting        :       Show both timers
  25  *
  26  *              This program is free software; you can redistribute it and/or
  27  *              modify it under the terms of the GNU General Public License
  28  *              as published by the Free Software Foundation; either version
  29  *              2 of the License, or (at your option) any later version.
  30  */
  31 #include <asm/system.h>
  32 #include <linux/autoconf.h>
  33 #include <linux/sched.h>
  34 #include <linux/socket.h>
  35 #include <linux/net.h>
  36 #include <linux/un.h>
  37 #include <linux/in.h>
  38 #include <linux/param.h>
  39 #include <linux/inet.h>
  40 #include <linux/netdevice.h>
  41 #include <net/ip.h>
  42 #include <net/icmp.h>
  43 #include <net/protocol.h>
  44 #include <net/tcp.h>
  45 #include <net/udp.h>
  46 #include <linux/skbuff.h>
  47 #include <net/sock.h>
  48 #include <net/raw.h>
  49 
  50 /*
  51  * Get__netinfo returns the length of that string.
  52  *
  53  * KNOWN BUGS
  54  *  As in get_unix_netinfo, the buffer might be too small. If this
  55  *  happens, get__netinfo returns only part of the available infos.
  56  */
  57 static int
  58 get__netinfo(struct proto *pro, char *buffer, int format, char **start, off_t offset, int length)
     /* [previous][next][first][last][top][bottom][index][help] */
  59 {
  60         struct sock **s_array;
  61         struct sock *sp;
  62         int i;
  63         int timer_active;
  64         int timer_active1;
  65         int timer_active2;
  66         unsigned long timer_expires;
  67         unsigned long  dest, src;
  68         unsigned short destp, srcp;
  69         int len=0;
  70         off_t pos=0;
  71         off_t begin=0;
  72   
  73         s_array = pro->sock_array;
  74         len+=sprintf(buffer, "sl  local_address rem_address   st tx_queue rx_queue tr tm->when uid\n");
  75 /*
  76  *      This was very pretty but didn't work when a socket is destroyed at the wrong moment
  77  *      (eg a syn recv socket getting a reset), or a memory timer destroy. Instead of playing
  78  *      with timers we just concede defeat and cli().
  79  */
  80         for(i = 0; i < SOCK_ARRAY_SIZE; i++) 
  81         {
  82                 cli();
  83                 sp = s_array[i];
  84                 while(sp != NULL) 
  85                 {
  86                         dest  = sp->daddr;
  87                         src   = sp->saddr;
  88                         destp = sp->dummy_th.dest;
  89                         srcp  = sp->dummy_th.source;
  90 
  91                         /* Since we are Little Endian we need to swap the bytes :-( */
  92                         destp = ntohs(destp);
  93                         srcp  = ntohs(srcp);
  94                         timer_active1 = del_timer(&sp->retransmit_timer);
  95                         timer_active2 = del_timer(&sp->timer);
  96                         if (!timer_active1) sp->retransmit_timer.expires=0;
  97                         if (!timer_active2) sp->timer.expires=0;
  98                         timer_active=0;
  99                         timer_expires=(unsigned)-1;
 100                         if (timer_active1 &&
 101                           sp->retransmit_timer.expires < timer_expires) {
 102                             timer_active=timer_active1;
 103                             timer_expires=sp->retransmit_timer.expires;
 104                         }
 105                         if (timer_active2 &&
 106                           sp->timer.expires < timer_expires) {
 107                             timer_active=timer_active2;
 108                             timer_expires=sp->timer.expires;
 109                         }
 110                         len+=sprintf(buffer+len, "%2d: %08lX:%04X %08lX:%04X %02X %08lX:%08lX %02X:%08lX %08X %d %d\n",
 111                                 i, src, srcp, dest, destp, sp->state, 
 112                                 format==0?sp->write_seq-sp->rcv_ack_seq:sp->rmem_alloc, 
 113                                 format==0?sp->acked_seq-sp->copied_seq:sp->wmem_alloc,
 114                                 timer_active, timer_expires, (unsigned) sp->retransmits,
 115                                 sp->socket?SOCK_INODE(sp->socket)->i_uid:0,
 116                                 timer_active?sp->timeout:0);
 117                         if (timer_active1) add_timer(&sp->retransmit_timer);
 118                         if (timer_active2) add_timer(&sp->timer);
 119                         /*
 120                          * All sockets with (port mod SOCK_ARRAY_SIZE) = i
 121                          * are kept in sock_array[i], so we must follow the
 122                          * 'next' link to get them all.
 123                          */
 124                         sp = sp->next;
 125                         pos=begin+len;
 126                         if(pos<offset)
 127                         {
 128                                 len=0;
 129                                 begin=pos;
 130                         }
 131                         if(pos>offset+length)
 132                                 break;
 133                 }
 134                 sti();  /* We only turn interrupts back on for a moment, but because the interrupt queues anything built up
 135                            before this will clear before we jump back and cli, so it's not as bad as it looks */
 136                 if(pos>offset+length)
 137                         break;
 138         }
 139         *start=buffer+(offset-begin);
 140         len-=(offset-begin);
 141         if(len>length)
 142                 len=length;
 143         return len;
 144 } 
 145 
 146 
 147 int tcp_get_info(char *buffer, char **start, off_t offset, int length)
     /* [previous][next][first][last][top][bottom][index][help] */
 148 {
 149         return get__netinfo(&tcp_prot, buffer,0, start, offset, length);
 150 }
 151 
 152 
 153 int udp_get_info(char *buffer, char **start, off_t offset, int length)
     /* [previous][next][first][last][top][bottom][index][help] */
 154 {
 155         return get__netinfo(&udp_prot, buffer,1, start, offset, length);
 156 }
 157 
 158 
 159 int raw_get_info(char *buffer, char **start, off_t offset, int length)
     /* [previous][next][first][last][top][bottom][index][help] */
 160 {
 161         return get__netinfo(&raw_prot, buffer,1, start, offset, length);
 162 }
 163 
 164 
 165 /*
 166  *      Report socket allocation statistics [mea@utu.fi]
 167  */
 168 int afinet_get_info(char *buffer, char **start, off_t offset, int length)
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 169 {
 170         /* From  net/socket.c  */
 171         extern int socket_get_info(char *, char **, off_t, int);
 172         extern struct proto packet_prot;
 173 
 174         int len  = socket_get_info(buffer,start,offset,length);
 175 
 176         len += sprintf(buffer+len,"SOCK_ARRAY_SIZE=%d\n",SOCK_ARRAY_SIZE);
 177         len += sprintf(buffer+len,"TCP: inuse %d highest %d\n",
 178                        tcp_prot.inuse, tcp_prot.highestinuse);
 179         len += sprintf(buffer+len,"UDP: inuse %d highest %d\n",
 180                        udp_prot.inuse, udp_prot.highestinuse);
 181         len += sprintf(buffer+len,"RAW: inuse %d highest %d\n",
 182                        raw_prot.inuse, raw_prot.highestinuse);
 183         len += sprintf(buffer+len,"PAC: inuse %d highest %d\n",
 184                        packet_prot.inuse, packet_prot.highestinuse);
 185         *start = buffer + offset;
 186         len -= offset;
 187         if (len > length)
 188                 len = length;
 189         return len;
 190 }
 191 
 192 
 193 /* 
 194  *      Called from the PROCfs module. This outputs /proc/net/snmp.
 195  */
 196  
 197 int snmp_get_info(char *buffer, char **start, off_t offset, int length)
     /* [previous][next][first][last][top][bottom][index][help] */
 198 {
 199         extern struct tcp_mib tcp_statistics;
 200         extern struct udp_mib udp_statistics;
 201         int len;
 202 /*
 203   extern unsigned long tcp_rx_miss, tcp_rx_hit1,tcp_rx_hit2;
 204 */
 205 
 206         len = sprintf (buffer,
 207                 "Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates\n"
 208                 "Ip: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 209                     ip_statistics.IpForwarding, ip_statistics.IpDefaultTTL, 
 210                     ip_statistics.IpInReceives, ip_statistics.IpInHdrErrors, 
 211                     ip_statistics.IpInAddrErrors, ip_statistics.IpForwDatagrams, 
 212                     ip_statistics.IpInUnknownProtos, ip_statistics.IpInDiscards, 
 213                     ip_statistics.IpInDelivers, ip_statistics.IpOutRequests, 
 214                     ip_statistics.IpOutDiscards, ip_statistics.IpOutNoRoutes, 
 215                     ip_statistics.IpReasmTimeout, ip_statistics.IpReasmReqds, 
 216                     ip_statistics.IpReasmOKs, ip_statistics.IpReasmFails, 
 217                     ip_statistics.IpFragOKs, ip_statistics.IpFragFails, 
 218                     ip_statistics.IpFragCreates);
 219                                 
 220         len += sprintf (buffer + len,
 221                 "Icmp: InMsgs InErrors InDestUnreachs InTimeExcds InParmProbs InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps InAddrMasks InAddrMaskReps OutMsgs OutErrors OutDestUnreachs OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos OutEchoReps OutTimestamps OutTimestampReps OutAddrMasks OutAddrMaskReps\n"
 222                 "Icmp: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 223                     icmp_statistics.IcmpInMsgs, icmp_statistics.IcmpInErrors,
 224                     icmp_statistics.IcmpInDestUnreachs, icmp_statistics.IcmpInTimeExcds,
 225                     icmp_statistics.IcmpInParmProbs, icmp_statistics.IcmpInSrcQuenchs,
 226                     icmp_statistics.IcmpInRedirects, icmp_statistics.IcmpInEchos,
 227                     icmp_statistics.IcmpInEchoReps, icmp_statistics.IcmpInTimestamps,
 228                     icmp_statistics.IcmpInTimestampReps, icmp_statistics.IcmpInAddrMasks,
 229                     icmp_statistics.IcmpInAddrMaskReps, icmp_statistics.IcmpOutMsgs,
 230                     icmp_statistics.IcmpOutErrors, icmp_statistics.IcmpOutDestUnreachs,
 231                     icmp_statistics.IcmpOutTimeExcds, icmp_statistics.IcmpOutParmProbs,
 232                     icmp_statistics.IcmpOutSrcQuenchs, icmp_statistics.IcmpOutRedirects,
 233                     icmp_statistics.IcmpOutEchos, icmp_statistics.IcmpOutEchoReps,
 234                     icmp_statistics.IcmpOutTimestamps, icmp_statistics.IcmpOutTimestampReps,
 235                     icmp_statistics.IcmpOutAddrMasks, icmp_statistics.IcmpOutAddrMaskReps);
 236         
 237         len += sprintf (buffer + len,
 238                 "Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs\n"
 239                 "Tcp: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 240                     tcp_statistics.TcpRtoAlgorithm, tcp_statistics.TcpRtoMin,
 241                     tcp_statistics.TcpRtoMax, tcp_statistics.TcpMaxConn,
 242                     tcp_statistics.TcpActiveOpens, tcp_statistics.TcpPassiveOpens,
 243                     tcp_statistics.TcpAttemptFails, tcp_statistics.TcpEstabResets,
 244                     tcp_statistics.TcpCurrEstab, tcp_statistics.TcpInSegs,
 245                     tcp_statistics.TcpOutSegs, tcp_statistics.TcpRetransSegs);
 246                 
 247         len += sprintf (buffer + len,
 248                 "Udp: InDatagrams NoPorts InErrors OutDatagrams\nUdp: %lu %lu %lu %lu\n",
 249                     udp_statistics.UdpInDatagrams, udp_statistics.UdpNoPorts,
 250                     udp_statistics.UdpInErrors, udp_statistics.UdpOutDatagrams);            
 251 /*      
 252           len += sprintf( buffer + len,
 253                 "TCP fast path RX:  H2: %ul H1: %ul L: %ul\n",
 254                         tcp_rx_hit2,tcp_rx_hit1,tcp_rx_miss);
 255 */
 256         
 257         if (offset >= len)
 258         {
 259                 *start = buffer;
 260                 return 0;
 261         }
 262         *start = buffer + offset;
 263         len -= offset;
 264         if (len > length)
 265                 len = length;
 266         return len;
 267 }
 268 

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