2.11BSD#431 - /usr/src/libexec/tcpd/misc.c

   1:  /*
   2:   * Misc routines that are used by tcpd and by tcpdchk.
   3:   *
   4:   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
   5:   */
   6: 
   7: #ifndef lint
   8: static char sccsic[] = "@(#) misc.c 1.1 94/12/28 17:42:31";
   9: #endif
  10: 
  11: #include <sys/types.h>
  12: #include <sys/param.h>
  13: #include <netinet/in.h>
  14: #include <arpa/inet.h>
  15: #include <stdio.h>
  16: #include <string.h>
  17: 
  18: #include "tcpd.h"
  19: 
  20: extern char *fgets();
  21: 
  22: #ifndef INADDR_NONE
  23: #define INADDR_NONE (-1)        /* XXX should be 0xffffffff */
  24: #endif
  25: 
  26: /* xgets - fgets() with backslash-newline stripping */
  27: 
  28: char   *xgets(ptr, len, fp)
  29: char   *ptr;
  30: int     len;
  31: FILE   *fp;
  32: {
  33:     int     got;
  34:     char   *start = ptr;
  35: 
  36:     while (fgets(ptr, len, fp)) {
  37:     got = strlen(ptr);
  38:     if (got >= 1 && ptr[got - 1] == '\n') {
  39:         tcpd_context.line++;
  40:         if (got >= 2 && ptr[got - 2] == '\\') {
  41:         got -= 2;
  42:         ptr += got;
  43:         len -= got;
  44:         ptr[0] = 0;
  45:         } else {
  46:         return (start);
  47:         }
  48:     }
  49:     }
  50:     return (ptr > start ? start : 0);
  51: }
  52: 
  53: /* split_at - break string at delimiter or return NULL */
  54: 
  55: char   *split_at(string, delimiter)
  56: char   *string;
  57: int     delimiter;
  58: {
  59:     char   *cp;
  60: 
  61:     if ((cp = strchr(string, delimiter)) != 0)
  62:     *cp++ = 0;
  63:     return (cp);
  64: }
  65: 
  66: /* dot_quad_addr - convert dotted quad to internal form */
  67: 
  68: unsigned long dot_quad_addr(str)
  69: char   *str;
  70: {
  71:     int     in_run = 0;
  72:     int     runs = 0;
  73:     char   *cp = str;
  74: 
  75:     /* Count the number of runs of non-dot characters. */
  76: 
  77:     while (*cp) {
  78:     if (*cp == '.') {
  79:         in_run = 0;
  80:     } else if (in_run == 0) {
  81:         in_run = 1;
  82:         runs++;
  83:     }
  84:     cp++;
  85:     }
  86:     return (runs == 4 ? inet_addr(str) : INADDR_NONE);
  87: }

Defined functions

Defined variables

Defined macros