i386/linux-2.3.21/net/ipv4/proc.c

   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:     $Id: proc.c,v 1.36 1999/07/02 11:26:34 davem Exp $
  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  *              Alan Cox        :       Allow inode to be NULL (kernel socket)
  26  *      Andi Kleen              :       Add support for open_requests and
  27  *                                      split functions for more readibility.
  28  *      Andi Kleen              :       Add support for /proc/net/netstat
  29  *
  30  *              This program is free software; you can redistribute it and/or
  31  *              modify it under the terms of the GNU General Public License
  32  *              as published by the Free Software Foundation; either version
  33  *              2 of the License, or (at your option) any later version.
  34  */
  35 #include <asm/system.h>
  36 #include <linux/sched.h>
  37 #include <linux/socket.h>
  38 #include <linux/net.h>
  39 #include <linux/un.h>
  40 #include <linux/in.h>
  41 #include <linux/param.h>
  42 #include <linux/inet.h>
  43 #include <linux/netdevice.h>
  44 #include <net/ip.h>
  45 #include <net/icmp.h>
  46 #include <net/protocol.h>
  47 #include <net/tcp.h>
  48 #include <net/udp.h>
  49 #include <linux/skbuff.h>
  50 #include <net/sock.h>
  51 #include <net/raw.h>
  52
  53 /*
  54  *      Report socket allocation statistics [mea@utu.fi]
  55  */
  56 int afinet_get_info(char *buffer, char **start, off_t offset, int length, int dummy)
  57 {
  58         /* From  net/socket.c  */
  59         extern int socket_get_info(char *, char **, off_t, int);
  60
  61         int len  = socket_get_info(buffer,start,offset,length);
  62
  63         len += sprintf(buffer+len,"TCP: inuse %d highest %d\n",
  64                        tcp_prot.inuse, tcp_prot.highestinuse);
  65         len += sprintf(buffer+len,"UDP: inuse %d highest %d\n",
  66                        udp_prot.inuse, udp_prot.highestinuse);
  67         len += sprintf(buffer+len,"RAW: inuse %d highest %d\n",
  68                        raw_prot.inuse, raw_prot.highestinuse);
  69         if (offset >= len)
  70         {
  71                 *start = buffer;
  72                 return 0;
  73         }
  74         *start = buffer + offset;
  75         len -= offset;
  76         if (len > length)
  77                 len = length;
  78         if (len < 0)
  79                 len = 0;
  80         return len;
  81 }
  82
  83
  84 /*
  85  *      Called from the PROCfs module. This outputs /proc/net/snmp.
  86  */
  87
  88 int snmp_get_info(char *buffer, char **start, off_t offset, int length, int dummy)
  89 {
  90         extern struct tcp_mib tcp_statistics;
  91         extern struct udp_mib udp_statistics;
  92         int len;
  93 /*
  94   extern unsigned long tcp_rx_miss, tcp_rx_hit1,tcp_rx_hit2;
  95 */
  96
  97         len = sprintf (buffer,
  98                 "Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates\n"
  99                 "Ip: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 100                     ip_statistics.IpForwarding, ip_statistics.IpDefaultTTL,
 101                     ip_statistics.IpInReceives, ip_statistics.IpInHdrErrors,
 102                     ip_statistics.IpInAddrErrors, ip_statistics.IpForwDatagrams,
 103                     ip_statistics.IpInUnknownProtos, ip_statistics.IpInDiscards,
 104                     ip_statistics.IpInDelivers, ip_statistics.IpOutRequests,
 105                     ip_statistics.IpOutDiscards, ip_statistics.IpOutNoRoutes,
 106                     ip_statistics.IpReasmTimeout, ip_statistics.IpReasmReqds,
 107                     ip_statistics.IpReasmOKs, ip_statistics.IpReasmFails,
 108                     ip_statistics.IpFragOKs, ip_statistics.IpFragFails,
 109                     ip_statistics.IpFragCreates);
 110
 111         len += sprintf (buffer + len,
 112                 "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"
 113                 "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",
 114                     icmp_statistics.IcmpInMsgs, icmp_statistics.IcmpInErrors,
 115                     icmp_statistics.IcmpInDestUnreachs, icmp_statistics.IcmpInTimeExcds,
 116                     icmp_statistics.IcmpInParmProbs, icmp_statistics.IcmpInSrcQuenchs,
 117                     icmp_statistics.IcmpInRedirects, icmp_statistics.IcmpInEchos,
 118                     icmp_statistics.IcmpInEchoReps, icmp_statistics.IcmpInTimestamps,
 119                     icmp_statistics.IcmpInTimestampReps, icmp_statistics.IcmpInAddrMasks,
 120                     icmp_statistics.IcmpInAddrMaskReps, icmp_statistics.IcmpOutMsgs,
 121                     icmp_statistics.IcmpOutErrors, icmp_statistics.IcmpOutDestUnreachs,
 122                     icmp_statistics.IcmpOutTimeExcds, icmp_statistics.IcmpOutParmProbs,
 123                     icmp_statistics.IcmpOutSrcQuenchs, icmp_statistics.IcmpOutRedirects,
 124                     icmp_statistics.IcmpOutEchos, icmp_statistics.IcmpOutEchoReps,
 125                     icmp_statistics.IcmpOutTimestamps, icmp_statistics.IcmpOutTimestampReps,
 126                     icmp_statistics.IcmpOutAddrMasks, icmp_statistics.IcmpOutAddrMaskReps);
 127
 128         len += sprintf (buffer + len,
 129                 "Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs OutRsts\n"
 130                 "Tcp: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 131                     tcp_statistics.TcpRtoAlgorithm, tcp_statistics.TcpRtoMin,
 132                     tcp_statistics.TcpRtoMax, tcp_statistics.TcpMaxConn,
 133                     tcp_statistics.TcpActiveOpens, tcp_statistics.TcpPassiveOpens,
 134                     tcp_statistics.TcpAttemptFails, tcp_statistics.TcpEstabResets,
 135                     tcp_statistics.TcpCurrEstab, tcp_statistics.TcpInSegs,
 136                     tcp_statistics.TcpOutSegs, tcp_statistics.TcpRetransSegs,
 137                     tcp_statistics.TcpInErrs, tcp_statistics.TcpOutRsts);
 138
 139         len += sprintf (buffer + len,
 140                 "Udp: InDatagrams NoPorts InErrors OutDatagrams\nUdp: %lu %lu %lu %lu\n",
 141                     udp_statistics.UdpInDatagrams, udp_statistics.UdpNoPorts,
 142                     udp_statistics.UdpInErrors, udp_statistics.UdpOutDatagrams);
 143 /*
 144           len += sprintf( buffer + len,
 145                 "TCP fast path RX:  H2: %ul H1: %ul L: %ul\n",
 146                         tcp_rx_hit2,tcp_rx_hit1,tcp_rx_miss);
 147 */
 148
 149         if (offset >= len)
 150         {
 151                 *start = buffer;
 152                 return 0;
 153         }
 154         *start = buffer + offset;
 155         len -= offset;
 156         if (len > length)
 157                 len = length;
 158         if (len < 0)
 159                 len = 0;
 160         return len;
 161 }
 162
 163 /*
 164  *      Output /proc/net/netstat
 165  */
 166
 167 int netstat_get_info(char *buffer, char **start, off_t offset, int length, int dummy)
 168 {
 169         extern struct linux_mib net_statistics;
 170         int len;
 171
 172         len = sprintf(buffer,
 173                       "TcpExt: SyncookiesSent SyncookiesRecv SyncookiesFailed"
 174                       " EmbryonicRsts PruneCalled RcvPruned OfoPruned"
 175                       " OutOfWindowIcmps LockDroppedIcmps\n"
 176                       "TcpExt: %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 177                       net_statistics.SyncookiesSent,
 178                       net_statistics.SyncookiesRecv,
 179                       net_statistics.SyncookiesFailed,
 180                       net_statistics.EmbryonicRsts,
 181                       net_statistics.PruneCalled,
 182                       net_statistics.RcvPruned,
 183                       net_statistics.OfoPruned,
 184                       net_statistics.OutOfWindowIcmps,
 185                       net_statistics.LockDroppedIcmps);
 186
 187         if (offset >= len)
 188         {
 189                 *start = buffer;
 190                 return 0;
 191         }
 192         *start = buffer + offset;
 193         len -= offset;
 194         if (len > length)
 195                 len = length;
 196         if (len < 0)
 197                 len = 0;
 198         return len;
 199 }