Benny Prijono | dd859a6 | 2005-11-01 16:42:51 +0000 | [diff] [blame^] | 1 | /* $Header: /pjproject-0.3/pjlib/src/pj/guid_simple.c 3 10/14/05 12:26a Bennylp $ */ |
| 2 | /* $Log: /pjproject-0.3/pjlib/src/pj/guid_simple.c $ |
| 3 | * |
| 4 | * 3 10/14/05 12:26a Bennylp |
| 5 | * Finished error code framework, some fixes in ioqueue, etc. Pretty |
| 6 | * major. |
| 7 | * |
| 8 | * 2 9/17/05 10:37a Bennylp |
| 9 | * Major reorganization towards version 0.3. |
| 10 | * |
| 11 | */ |
| 12 | #include <pj/guid.h> |
| 13 | #include <pj/os.h> |
| 14 | #include <pj/rand.h> |
| 15 | #include <pj/string.h> |
| 16 | #include <pj/compat/sprintf.h> |
| 17 | |
| 18 | const unsigned PJ_GUID_STRING_LENGTH=20; |
| 19 | |
| 20 | static void init_mac_address(unsigned char mac_addr[16]) |
| 21 | { |
| 22 | unsigned long *ulval1 = (unsigned long*) &mac_addr[0]; |
| 23 | unsigned short *usval1 = (unsigned short*) &mac_addr[4]; |
| 24 | |
| 25 | *ulval1 = pj_rand(); |
| 26 | *usval1 = (unsigned short) pj_rand(); |
| 27 | } |
| 28 | |
| 29 | PJ_DEF(pj_str_t*) pj_generate_unique_string(pj_str_t *str) |
| 30 | { |
| 31 | static int guid_initialized; |
| 32 | static unsigned pid; |
| 33 | static char str_pid[5]; |
| 34 | static unsigned char mac_addr[6]; |
| 35 | static char str_mac_addr[16]; |
| 36 | static unsigned clock_seq; |
| 37 | |
| 38 | PJ_CHECK_STACK(); |
| 39 | |
| 40 | if (guid_initialized == 0) { |
| 41 | pid = pj_getpid(); |
| 42 | init_mac_address(mac_addr); |
| 43 | clock_seq = 0; |
| 44 | |
| 45 | sprintf(str_pid, "%04x", pid); |
| 46 | sprintf(str_mac_addr, "%02x%02x%02x%02x%02x%02x", |
| 47 | mac_addr[0], mac_addr[1], mac_addr[2], |
| 48 | mac_addr[3], mac_addr[4], mac_addr[5]); |
| 49 | |
| 50 | guid_initialized = 1; |
| 51 | } |
| 52 | |
| 53 | strcpy(str->ptr, str_pid); |
| 54 | sprintf(str->ptr+4, "%04x", clock_seq++); |
| 55 | pj_memcpy(str->ptr+8, str_mac_addr, 12); |
| 56 | str->slen = 20; |
| 57 | |
| 58 | return str; |
| 59 | } |
| 60 | |