nng_msg_header - return message header

NAME  SYNOPSIS  DESCRIPTION  RETURN VALUES  ERRORS  SEE ALSO 

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NAME

nng_msg_header − return message header

SYNOPSIS

#include <nng/nng.h>

void *nng_msg_header(nng_msg *msg);

DESCRIPTION

The nng_msg_header() function returns a pointer to the start of the header content of the message msg.

Note

The message header contains protocol−specific header content. Most applications should not need to access this content, but it is available for raw mode sockets (set with the NNG_OPT_RAW option.)

Note

The value returned by this is invalidated by a call to any of the functions that modify the message or the header content.

RETURN VALUES

Pointer to start of message header.

ERRORS

None.

SEE ALSO

nng_msg_alloc(3), nng_msg_body(3), nng_msg_free(3), nng_msg_header_append(3), nng_msg_header_chop(3), nng_msg_header_insert(3) nng_msg_header_len(3), nng_msg_header_trim(3), nng_msg(5), nng(7)

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