osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 1 | #include <errno.h> |
Mike Frysinger | 9ec0e89 | 2010-06-09 14:52:41 +0000 | [diff] [blame] | 2 | #include <string.h> |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 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 | { |
Mike Frysinger | 9ec0e89 | 2010-06-09 14:52:41 +0000 | [diff] [blame] | 41 | u_int16_t addr; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 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; |
Mike Frysinger | 9ec0e89 | 2010-06-09 14:52:41 +0000 | [diff] [blame] | 53 | addr = dn_htons((area << 10) | node); |
| 54 | memcpy(dna->a_addr, &addr, sizeof(addr)); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 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 | } |