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 * $FreeBSD$ 7 */ 8 9 #ifndef lint 10 static char sccsic[] = "@(#) misc.c 1.2 96/02/11 17:01:29"; 11 #endif 12 13 #include <sys/types.h> 14 #include <sys/param.h> 15 #include <netinet/in.h> 16 #include <arpa/inet.h> 17 #include <stdio.h> 18 #include <string.h> 19 20 #include "tcpd.h" 21 22 extern char *fgets(); 23 24 #ifndef INADDR_NONE 25 #define INADDR_NONE (-1) /* XXX should be 0xffffffff */ 26 #endif 27 28 /* xgets - fgets() with backslash-newline stripping */ 29 30 char *xgets(ptr, len, fp) 31 char *ptr; 32 int len; 33 FILE *fp; 34 { 35 int got; 36 char *start = ptr; 37 38 while (fgets(ptr, len, fp)) { 39 got = strlen(ptr); 40 if (got >= 1 && ptr[got - 1] == '\n') { 41 tcpd_context.line++; 42 if (got >= 2 && ptr[got - 2] == '\\') { 43 got -= 2; 44 } else { 45 return (start); 46 } 47 } 48 ptr += got; 49 len -= got; 50 ptr[0] = 0; 51 } 52 return (ptr > start ? start : 0); 53 } 54 55 /* split_at - break string at delimiter or return NULL */ 56 57 char *split_at(string, delimiter) 58 char *string; 59 int delimiter; 60 { 61 char *cp; 62 63 #ifdef INET6 64 int bracket = 0; 65 66 for (cp = string; cp && *cp; cp++) { 67 switch (*cp) { 68 case '[': 69 bracket++; 70 break; 71 case ']': 72 bracket--; 73 break; 74 default: 75 if (bracket == 0 && *cp == delimiter) { 76 *cp++ = 0; 77 return cp; 78 } 79 break; 80 } 81 } 82 return (NULL); 83 #else 84 if ((cp = strchr(string, delimiter)) != 0) 85 *cp++ = 0; 86 return (cp); 87 #endif 88 } 89 90 /* dot_quad_addr - convert dotted quad to internal form */ 91 92 unsigned long dot_quad_addr(str) 93 char *str; 94 { 95 int in_run = 0; 96 int runs = 0; 97 char *cp = str; 98 99 /* Count the number of runs of non-dot characters. */ 100 101 while (*cp) { 102 if (*cp == '.') { 103 in_run = 0; 104 } else if (in_run == 0) { 105 in_run = 1; 106 runs++; 107 } 108 cp++; 109 } 110 return (runs == 4 ? inet_addr(str) : INADDR_NONE); 111 } 112