net/inet/utils.c

/* */
This source file includes following definitions.
in_ntoa
in_aton
dprintf
dbg_ioctl
   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  *              Various kernel-resident INET utility functions; mainly
   7  *              for format conversion and debugging output.
   8  *
   9  * Version:     @(#)utils.c     1.0.7   05/18/93
  10  *
  11  * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *
  13  * Fixes:
  14  *              Alan Cox        :       verify_area check.
  15  *
  16  *
  17  *              This program is free software; you can redistribute it and/or
  18  *              modify it under the terms of the GNU General Public License
  19  *              as published by the Free Software Foundation; either version
  20  *              2 of the License, or (at your option) any later version.
  21  */
  22 #include <asm/segment.h>
  23 #include <asm/system.h>
  24 #include <linux/types.h>
  25 #include <linux/kernel.h>
  26 #include <linux/sched.h>
  27 #include <linux/string.h>
  28 #include <linux/mm.h>
  29 #include <linux/socket.h>
  30 #include <linux/in.h>
  31 #include <linux/errno.h>
  32 #include <linux/stat.h>
  33 #include <stdarg.h>
  34 #include "inet.h"
  35 #include "dev.h"
  36 #include "eth.h"
  37 #include "ip.h"
  38 #include "protocol.h"
  39 #include "tcp.h"
  40 #include "skbuff.h"
  41 #include "arp.h"
  42 
  43 
  44 /* Display an IP address in readable format. */
  45 char *in_ntoa(unsigned long in)
     /*  */
  46 {
  47   static char buff[18];
  48   register char *p;
  49 
  50   p = (char *) &in;
  51   sprintf(buff, "%d.%d.%d.%d",
  52         (p[0] & 255), (p[1] & 255), (p[2] & 255), (p[3] & 255));
  53   return(buff);
  54 }
  55 
  56 
  57 /* Convert an ASCII string to binary IP. */
  58 unsigned long
  59 in_aton(char *str)
     /*  */
  60 {
  61   unsigned long l;
  62   unsigned int val;
  63   int i;
  64 
  65   l = 0;
  66   for (i = 0; i < 4; i++) {
  67         l <<= 8;
  68         if (*str != '\0') {
  69                 val = 0;
  70                 while (*str != '\0' && *str != '.') {
  71                         val *= 10;
  72                         val += *str - '0';
  73                         str++;
  74                 }
  75                 l |= val;
  76                 if (*str != '\0') str++;
  77         }
  78   }
  79   return(htonl(l));
  80 }
  81 
  82 
  83 void
  84 dprintf(int level, char *fmt, ...)
     /*  */
  85 {
  86   va_list args;
  87   char *buff;
  88   extern int vsprintf(char * buf, const char * fmt, va_list args);
  89 
  90   if (level != inet_debug) return;
  91 
  92   buff = (char *) kmalloc(256, GFP_ATOMIC);
  93   if (buff != NULL) {
  94         va_start(args, fmt);
  95         vsprintf(buff, fmt, args);
  96         va_end(args);
  97         printk(buff);
  98         kfree(buff);
  99   }
 100 }
 101 
 102 
 103 int
 104 dbg_ioctl(void *arg, int level)
     /*  */
 105 {
 106   int val;
 107   int err;
 108   
 109   if (!suser()) return(-EPERM);
 110   err=verify_area(VERIFY_READ, (void *)arg, sizeof(int));
 111   if(err)
 112         return err;
 113   val = get_fs_long((int *)arg);
 114   switch(val) {
 115         case 0: /* OFF */
 116                 inet_debug = DBG_OFF;
 117                 break;
 118         case 1: /* ON, INET */
 119                 inet_debug = level;
 120                 break;
 121 
 122         case DBG_RT:            /* modules */
 123         case DBG_DEV:
 124         case DBG_ETH:
 125         case DBG_PROTO:
 126         case DBG_TMR:
 127         case DBG_PKT:
 128         case DBG_RAW:
 129 
 130         case DBG_LOOPB:         /* drivers */
 131         case DBG_SLIP:
 132 
 133         case DBG_ARP:           /* protocols */
 134         case DBG_IP:
 135         case DBG_ICMP:
 136         case DBG_TCP:
 137         case DBG_UDP:
 138 
 139                 inet_debug = val;
 140                 break;
 141 
 142         default:
 143                 return(-EINVAL);
 144   }
 145 
 146   return(0);
 147 }
/* */
root/net/inet/utils.c

DEFINITIONS
