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 1.2 96/02/11 17:01:29"; 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 } else { 43 return (start); 44 } 45 } 46 ptr += got; 47 len -= got; 48 ptr[0] = 0; 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 } 88