| Value | Meaning |
|---|---|
| none0 | No flags specified |
| outOfBandMSG_OOB | Out-of-band stream data |
| peekMSG_PEEK | Peek at incoming data without removing it from the queue, only for receiving |
| dontRouteMSG_DONTROUTE | Data should not be subject to routing; this flag may be ignored. Only for sending |
Flags may be OR'ed together.