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Diffstat (limited to 'docs/ref/api/sock.md')
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diff --git a/docs/ref/api/sock.md b/docs/ref/api/sock.md index ec6b20e1..88242721 100644 --- a/docs/ref/api/sock.md +++ b/docs/ref/api/sock.md @@ -271,6 +271,47 @@ On success, the received message can be retrieved from the _aio_ using the [`nng > steps on the part of the application, the lowest latencies and highest performance will be achieved by using > this function instead of [`nng_recv`] or [`nng_recvmsg`]. +## Socket Options + +```c +int nng_socket_get_bool(nng_socket s, const char *opt, bool *valp); +int nng_socket_get_int(nng_socket s, const char *opt, int *valp); +int nng_socket_get_ms(nng_socket s, const char *opt, nng_duration *valp); +int nng_socket_get_size(nng_socket s, const char *opt, size_t *valp); +int nng_socket_get_uint64(nng_socket s, const char *opt, uint64_t *valp); + +int nng_socket_set_bool(nng_socket s, const char *opt, int val); +int nng_socket_set_int(nng_socket s, const char *opt, int val); +int nng_socket_set_ms(nng_socket s, const char *opt, nng_duration val); +int nng_socket_set_size(nng_socket s, const char *opt, size_t val); +int nng_socket_set_uint64(nng_socket s, const char *opt, uint64_t val); +``` + +Protocols usually have protocol specific behaviors that can be adjusted via options. + +These functions are used to retrieve or change the value of an option named _opt_ from the context _ctx_. +The `nng_socket_get_` functions retrieve the value from the socket _s_, and store it in the location _valp_ references. +The `nng_socket_set_` functions change the value for the socket _s_, taking it from _val_. + +These functions access an option as a specific type. The protocol documentation will have details about which options +are available, whether they can be read or written, and the appropriate type to use. + +> [!NOTE] +> Socket options are are used to tune the behavior of the higher level protocol. To change the options +> for an underlying transport, the option should be set on the [dialer] or [listener] instead of the [socket]. + +### Common Options + +The following options are available for many protocols, and always use the same types and semantics described below. + +| Option | Type | Description | +| --------------------------------------------------- | -------------- | ------------------------------------------------------------------------------------------------------------------------- | +| `NNG_OPT_RECVBUF`<a name="NNG_OPT_RECVBUF"></a> | `int` | Maximum number of messages to buffer locally when receiving. | +| `NNG_OPT_SENDBUF`<a name="NNG_OPT_SENDBUF"></a> | `int` | Maximum number of messages to buffer when sending messages. | +| `NNG_OPT_RECVMAXSZ`<a name="NNG_OPT_RECVMAXSZ"></a> | `size_t` | Maximum message size acceptable for receiving. Can be tuned independently on [dialers][dialer] and [listeners][listener]. | +| `NNG_OPT_RECVTIMEO`<a name="NNG_OPT_RECVTIMEO"></a> | `nng_duration` | Default timeout (ms) for receiving messages. | +| `NNG_OPT_SENDTIMEO`<a name="NNG_OPT_SENDTIMEO"></a> | `nng_duration` | Default timeout (ms) for sending messages. | + ## Polling Socket Events ```c |