doq_conid_cmp
table->conid_tree = rbtree_create(doq_conid_cmp);
int doq_conid_cmp(const void* key1, const void* key2);
else if(fptr == &doq_conid_cmp) return 1;
table->conid_tree = rbtree_create(doq_conid_cmp);
int doq_conid_cmp(const void* key1, const void* key2);
else if(fptr == &doq_conid_cmp) return 1;