| nn_cmsg(3) |
| ========== |
| |
| NAME |
| ---- |
| nn_cmsg - access control information |
| |
| |
| SYNOPSIS |
| -------- |
| *#include <nanomsg/nn.h>* |
| |
| *struct nn_cmsghdr *NN_CMSG_FIRSTHDR(struct nn_msghdr '*hdr');* |
| |
| *struct nn_cmsghdr *NN_CMSG_NXTHDR(struct nn_msghdr '*hdr', struct nn_cmsghdr '*cmsg');* |
| |
| *unsigned char *NN_CMSG_DATA(struct nn_cmsghdr '*cmsg');* |
| |
| *size_t NN_CMSG_SPACE(size_t 'len');* |
| |
| *size_t NN_CMSG_LEN(size_t 'len');* |
| |
| DESCRIPTION |
| ----------- |
| |
| _NN_CMSG_FIRSTHDR_ returns a pointer to the first nn_cmsghdr in the control buffer in the supplied nn_msghdr structure. |
| |
| _NN_CMSG_NXTHDR_ returns the next nn_cmsghdr after the supplied nn_cmsghdr. Returns NULL if there isn't enough space in the buffer. |
| |
| _NN_CMSG_DATA_ returns a pointer to the data associated with supplied nn_cmsghdr. |
| |
| _NN_CMSG_SPACE_ returns the number of bytes occupied by nn_cmsghdr with payload of the specified length. |
| |
| _NN_CMSG_LEN_ returns the value to store in the cmsg_len member of the cmsghdr structure, taking into account any necessary alignment. |
| |
| |
| SEE ALSO |
| -------- |
| linknanomsg:nn_sendmsg[3] |
| linknanomsg:nn_recvmsg[3] |
| linknanomsg:nanomsg[7] |
| |
| |
| AUTHORS |
| ------- |
| Martin Sustrik <sustrik@250bpm.com> |
| |
