1 #include <errno.h> 2 #include <string.h> 3 #include <sys/types.h> 4 #include <netinet/in.h> 5 6 #include "utils.h" 7 8 static __inline__ u_int16_t dn_htons(u_int16_t addr) 9 { 10 union { 11 u_int8_t byte[2]; 12 u_int16_t word; 13 } u; 14 15 u.word = addr; 16 return ((u_int16_t)u.byte[0]) | (((u_int16_t)u.byte[1]) << 8); 17 } 18 19 20 static int dnet_num(const char *src, u_int16_t * dst) 21 { 22 int rv = 0; 23 int tmp; 24 *dst = 0; 25 26 while ((tmp = *src++) != 0) { 27 tmp -= '0'; 28 if ((tmp < 0) || (tmp > 9)) 29 return rv; 30 31 rv++; 32 (*dst) *= 10; 33 (*dst) += tmp; 34 } 35 36 return rv; 37 } 38 39 static int dnet_pton1(const char *src, struct dn_naddr *dna) 40 { 41 u_int16_t addr; 42 u_int16_t area = 0; 43 u_int16_t node = 0; 44 int pos; 45 46 pos = dnet_num(src, &area); 47 if ((pos == 0) || (area > 63) || (*(src + pos) != '.')) 48 return 0; 49 pos = dnet_num(src + pos + 1, &node); 50 if ((pos == 0) || (node > 1023)) 51 return 0; 52 dna->a_len = 2; 53 addr = dn_htons((area << 10) | node); 54 memcpy(dna->a_addr, &addr, sizeof(addr)); 55 56 return 1; 57 } 58 59 int dnet_pton(int af, const char *src, void *addr) 60 { 61 int err; 62 63 switch (af) { 64 case AF_DECnet: 65 errno = 0; 66 err = dnet_pton1(src, (struct dn_naddr *)addr); 67 break; 68 default: 69 errno = EAFNOSUPPORT; 70 err = -1; 71 } 72 73 return err; 74 } 75
