1 /************************************************************************** 2 MISC Support Routines 3 **************************************************************************/ 4 5 FILE_LICENCE ( GPL2_OR_LATER ); 6 7 #include <stdlib.h> 8 #include <ctype.h> 9 #include <byteswap.h> 10 #include <gpxe/in.h> 11 #include <gpxe/timer.h> 12 13 /************************************************************************** 14 INET_ATON - Convert an ascii x.x.x.x to binary form 15 **************************************************************************/ 16 int inet_aton ( const char *cp, struct in_addr *inp ) { 17 const char *p = cp; 18 const char *digits_start; 19 unsigned long ip = 0; 20 unsigned long val; 21 int j; 22 for(j = 0; j <= 3; j++) { 23 digits_start = p; 24 val = strtoul(p, ( char ** ) &p, 10); 25 if ((p == digits_start) || (val > 255)) return 0; 26 if ( ( j < 3 ) && ( *(p++) != '.' ) ) return 0; 27 ip = (ip << 8) | val; 28 } 29 if ( *p == '\0' ) { 30 inp->s_addr = htonl(ip); 31 return 1; 32 } 33 return 0; 34 } 35 36 unsigned long strtoul ( const char *p, char **endp, int base ) { 37 unsigned long ret = 0; 38 unsigned int charval; 39 40 while ( isspace ( *p ) ) 41 p++; 42 43 if ( base == 0 ) { 44 base = 10; 45 if ( *p == '0' ) { 46 p++; 47 base = 8; 48 if ( ( *p | 0x20 ) == 'x' ) { 49 p++; 50 base = 16; 51 } 52 } 53 } 54 55 while ( 1 ) { 56 charval = *p; 57 if ( charval >= 'a' ) { 58 charval = ( charval - 'a' + 10 ); 59 } else if ( charval >= 'A' ) { 60 charval = ( charval - 'A' + 10 ); 61 } else if ( charval <= '9' ) { 62 charval = ( charval - '0' ); 63 } 64 if ( charval >= ( unsigned int ) base ) 65 break; 66 ret = ( ( ret * base ) + charval ); 67 p++; 68 } 69 70 if ( endp ) 71 *endp = ( char * ) p; 72 73 return ( ret ); 74 } 75 76 /* 77 * Local variables: 78 * c-basic-offset: 8 79 * End: 80 */ 81
