| s | ¼ÒÄÏ ½Äº°ÀÚ |
| level | ¾Æ·¡ Å×À̺í ÂüÁ¶ |
| optname | ¾Æ·¡ Å×À̺í ÂüÁ¶ |
| optval | ¿É¼Ç°ªÀ» °¡Áö´Â º¯¼öÀÇ Æ÷ÀÎÅÍ |
| optlen | ¿É¼Ç°ªÀ» °¡Áö´Â º¯¼öÀÇ Å©±â |
| Level | Optname | Description |
| IPPROTO_IP | IP_OPTIONS | Options in IP Header |
| IPPROTO_TCP | TCP_MAXSEG | Get TCP maximum segment |
| TCP_NODELAY | Don't delay send | |
| SOL_SOCKET | SO_BROADCAST | Permit broadcast |
| SO_DEBUG | Debug flag | |
| SO_DONTROUTE | No routing | |
| SO_ERROR | Get and clear error code | |
| SO_KEEPALIVE | Keepalive probing | |
| SO_LINGER | Linger on close | |
| SO_OOBINLINE | Leave URG data in line | |
| SO_RCVBUF | Receive buffer size | |
| SO_SNDBUF | Send buffer size | |
| SO_TYPE | Get socket type | |
| SO_REUSEADDR | Local address reuse |
| -1 | ¿¡·¯ |
| 0 | ¼º°øÀûÀ¸·Î ¼öÇà |