int sal_create_uuid(Sal*ctx, char *uuid, size_t len){
sal_uuid_t uuid_struct;
int i;
int written;
if (len==0) return -1;
/*create an UUID as described in RFC4122, 4.4 */
belle_sip_random_bytes((unsigned char*)&uuid_struct, sizeof(sal_uuid_t));
uuid_struct.clock_seq_hi_and_reserved&=~(1<<6);
uuid_struct.clock_seq_hi_and_reserved|=1<<7;
uuid_struct.time_hi_and_version&=~(0xf<<12);
uuid_struct.time_hi_and_version|=4<<12;
written=snprintf(uuid,len,"%8.8x-%4.4x-%4.4x-%2.2x%2.2x-", uuid_struct.time_low, uuid_struct.time_mid,
uuid_struct.time_hi_and_version, uuid_struct.clock_seq_hi_and_reserved,
uuid_struct.clock_seq_low);
if (written>len+13){
ms_error("sal_create_uuid(): buffer is too short !");
return -1;
}
for (i = 0; i < 6; i++)
written+=snprintf(uuid+written,len-written,"%2.2x", uuid_struct.node[i]);
uuid[len-1]='\0';
sal_set_uuid(ctx,uuid);
return 0;
}
int sal_create_uuid(Sal*ctx, char *uuid, size_t len) {
if (sal_generate_uuid(uuid, len) == 0) {
sal_set_uuid(ctx, uuid);
return 0;
}
return -1;
}
