net/inet/proc.c

/* */
This source file includes following definitions.
get__netinfo
tcp_get_info
udp_get_info
raw_get_info
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       :       Pidentd support
  21  *              Alan Cox        :       Make /proc safer.
  22  *      Erik Schoenfelder       :       /proc/net/snmp
  23  *              Alan Cox        :       Handle dead sockets properly.
  24  *
  25  *              This program is free software; you can redistribute it and/or
  26  *              modify it under the terms of the GNU General Public License
  27  *              as published by the Free Software Foundation; either version
  28  *              2 of the License, or (at your option) any later version.
  29  */
  30 #include <asm/system.h>
  31 #include <linux/autoconf.h>
  32 #include <linux/sched.h>
  33 #include <linux/socket.h>
  34 #include <linux/net.h>
  35 #include <linux/un.h>
  36 #include <linux/in.h>
  37 #include <linux/param.h>
  38 #include <linux/inet.h>
  39 #include <linux/netdevice.h>
  40 #include "ip.h"
  41 #include "icmp.h"
  42 #include "protocol.h"
  43 #include "tcp.h"
  44 #include "udp.h"
  45 #include <linux/skbuff.h>
  46 #include "sock.h"
  47 #include "raw.h"
  48 
  49 /*
  50  * Get__netinfo returns the length of that string.
  51  *
  52  * KNOWN BUGS
  53  *  As in get_unix_netinfo, the buffer might be too small. If this
  54  *  happens, get__netinfo returns only part of the available infos.
  55  */
  56 static int
  57 get__netinfo(struct proto *pro, char *buffer, int format, char **start, off_t offset, int length)
     /*  */
  58 {
  59         struct sock **s_array;
  60         struct sock *sp;
  61         int i;
  62         int timer_active;
  63         unsigned long  dest, src;
  64         unsigned short destp, srcp;
  65         int len=0;
  66         off_t pos=0;
  67         off_t begin=0;
  68   
  69         s_array = pro->sock_array;
  70         len+=sprintf(buffer, "sl  local_address rem_address   st tx_queue rx_queue tr tm->when uid\n");
  71 /*
  72  *      This was very pretty but didn't work when a socket is destroyed at the wrong moment
  73  *      (eg a syn recv socket getting a reset), or a memory timer destroy. Instead of playing
  74  *      with timers we just concede defeat and cli().
  75  */
  76         for(i = 0; i < SOCK_ARRAY_SIZE; i++) 
  77         {
  78                 cli();
  79                 sp = s_array[i];
  80                 while(sp != NULL) 
  81                 {
  82                         dest  = sp->daddr;
  83                         src   = sp->saddr;
  84                         destp = sp->dummy_th.dest;
  85                         srcp  = sp->dummy_th.source;
  86 
  87                         /* Since we are Little Endian we need to swap the bytes :-( */
  88                         destp = ntohs(destp);
  89                         srcp  = ntohs(srcp);
  90                         timer_active = del_timer(&sp->timer);
  91                         if (!timer_active)
  92                                 sp->timer.expires = 0;
  93                         len+=sprintf(buffer+len, "%2d: %08lX:%04X %08lX:%04X %02X %08lX:%08lX %02X:%08lX %08X %d\n",
  94                                 i, src, srcp, dest, destp, sp->state, 
  95                                 format==0?sp->write_seq-sp->rcv_ack_seq:sp->rmem_alloc, 
  96                                 format==0?sp->acked_seq-sp->copied_seq:sp->wmem_alloc,
  97                                 timer_active, sp->timer.expires, (unsigned) sp->retransmits,
  98                                 sp->dead?0:SOCK_INODE(sp->socket)->i_uid);
  99                         if (timer_active)
 100                                 add_timer(&sp->timer);
 101                         /*
 102                          * All sockets with (port mod SOCK_ARRAY_SIZE) = i
 103                          * are kept in sock_array[i], so we must follow the
 104                          * 'next' link to get them all.
 105                          */
 106                         sp = sp->next;
 107                         pos=begin+len;
 108                         if(pos<offset)
 109                         {
 110                                 len=0;
 111                                 begin=pos;
 112                         }
 113                         if(pos>offset+length)
 114                                 break;
 115                 }
 116                 sti();  /* We only turn interrupts back on for a moment, but because the interrupt queues anything built up
 117                            before this will clear before we jump back and cli, so its not as bad as it looks */
 118                 if(pos>offset+length)
 119                         break;
 120         }
 121         *start=buffer+(offset-begin);
 122         len-=(offset-begin);
 123         if(len>length)
 124                 len=length;
 125         return len;
 126 } 
 127 
 128 
 129 int tcp_get_info(char *buffer, char **start, off_t offset, int length)
     /*  */
 130 {
 131         return get__netinfo(&tcp_prot, buffer,0, start, offset, length);
 132 }
 133 
 134 
 135 int udp_get_info(char *buffer, char **start, off_t offset, int length)
     /*  */
 136 {
 137         return get__netinfo(&udp_prot, buffer,1, start, offset, length);
 138 }
 139 
 140 
 141 int raw_get_info(char *buffer, char **start, off_t offset, int length)
     /*  */
 142 {
 143         return get__netinfo(&raw_prot, buffer,1, start, offset, length);
 144 }
 145 
 146 
 147 /* 
 148  *      Called from the PROCfs module. This outputs /proc/net/snmp.
 149  */
 150  
 151 int snmp_get_info(char *buffer, char **start, off_t offset, int length)
     /*  */
 152 {
 153         extern struct tcp_mib tcp_statistics;
 154         extern struct udp_mib udp_statistics;
 155         int len;
 156 /*
 157   extern unsigned long tcp_rx_miss, tcp_rx_hit1,tcp_rx_hit2;
 158 */
 159 
 160         len = sprintf (buffer,
 161                 "Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates\n"
 162                 "Ip: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 163                     ip_statistics.IpForwarding, ip_statistics.IpDefaultTTL, 
 164                     ip_statistics.IpInReceives, ip_statistics.IpInHdrErrors, 
 165                     ip_statistics.IpInAddrErrors, ip_statistics.IpForwDatagrams, 
 166                     ip_statistics.IpInUnknownProtos, ip_statistics.IpInDiscards, 
 167                     ip_statistics.IpInDelivers, ip_statistics.IpOutRequests, 
 168                     ip_statistics.IpOutDiscards, ip_statistics.IpOutNoRoutes, 
 169                     ip_statistics.IpReasmTimeout, ip_statistics.IpReasmReqds, 
 170                     ip_statistics.IpReasmOKs, ip_statistics.IpReasmFails, 
 171                     ip_statistics.IpFragOKs, ip_statistics.IpFragFails, 
 172                     ip_statistics.IpFragCreates);
 173                                 
 174         len += sprintf (buffer + len,
 175                 "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"
 176                 "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",
 177                     icmp_statistics.IcmpInMsgs, icmp_statistics.IcmpInErrors,
 178                     icmp_statistics.IcmpInDestUnreachs, icmp_statistics.IcmpInTimeExcds,
 179                     icmp_statistics.IcmpInParmProbs, icmp_statistics.IcmpInSrcQuenchs,
 180                     icmp_statistics.IcmpInRedirects, icmp_statistics.IcmpInEchos,
 181                     icmp_statistics.IcmpInEchoReps, icmp_statistics.IcmpInTimestamps,
 182                     icmp_statistics.IcmpInTimestampReps, icmp_statistics.IcmpInAddrMasks,
 183                     icmp_statistics.IcmpInAddrMaskReps, icmp_statistics.IcmpOutMsgs,
 184                     icmp_statistics.IcmpOutErrors, icmp_statistics.IcmpOutDestUnreachs,
 185                     icmp_statistics.IcmpOutTimeExcds, icmp_statistics.IcmpOutParmProbs,
 186                     icmp_statistics.IcmpOutSrcQuenchs, icmp_statistics.IcmpOutRedirects,
 187                     icmp_statistics.IcmpOutEchos, icmp_statistics.IcmpOutEchoReps,
 188                     icmp_statistics.IcmpOutTimestamps, icmp_statistics.IcmpOutTimestampReps,
 189                     icmp_statistics.IcmpOutAddrMasks, icmp_statistics.IcmpOutAddrMaskReps);
 190         
 191         len += sprintf (buffer + len,
 192                 "Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs\n"
 193                 "Tcp: %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",
 194                     tcp_statistics.TcpRtoAlgorithm, tcp_statistics.TcpRtoMin,
 195                     tcp_statistics.TcpRtoMax, tcp_statistics.TcpMaxConn,
 196                     tcp_statistics.TcpActiveOpens, tcp_statistics.TcpPassiveOpens,
 197                     tcp_statistics.TcpAttemptFails, tcp_statistics.TcpEstabResets,
 198                     tcp_statistics.TcpCurrEstab, tcp_statistics.TcpInSegs,
 199                     tcp_statistics.TcpOutSegs, tcp_statistics.TcpRetransSegs);
 200                 
 201         len += sprintf (buffer + len,
 202                 "Udp: InDatagrams NoPorts InErrors OutDatagrams\nUdp: %lu %lu %lu %lu\n",
 203                     udp_statistics.UdpInDatagrams, udp_statistics.UdpNoPorts,
 204                     udp_statistics.UdpInErrors, udp_statistics.UdpOutDatagrams);            
 205 /*      
 206           len += sprintf( buffer + len,
 207                 "TCP fast path RX:  H2: %ul H1: %ul L: %ul\n",
 208                         tcp_rx_hit2,tcp_rx_hit1,tcp_rx_miss);
 209 */
 210         
 211         if (offset >= len)
 212         {
 213                 *start = buffer;
 214                 return 0;
 215         }
 216         *start = buffer + offset;
 217         len -= offset;
 218         if (len > length)
 219                 len = length;
 220         return len;
 221 }
 222
/* */
root/net/inet/proc.c

DEFINITIONS
