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io_uring_recvmsg_out(3) liburing Manual io_uring_recvmsg_out(3)
io_uring_recvmsg_out - access data from multishot recvmsg
#include <liburing.h> struct io_uring_recvmsg_out *io_uring_recvmsg_validate(void *buf, int buf_len, struct msghdr *msgh); void *io_uring_recvmsg_name(struct io_uring_recvmsg_out *o); struct cmsghdr *io_uring_recvmsg_cmsg_firsthdr(struct io_uring_recvmsg_out *o, struct msghdr *msgh); struct cmsghdr *io_uring_recvmsg_cmsg_nexthdr(struct io_uring_recvmsg_out *o, struct msghdr *msgh, struct cmsghdr *cmsg); void *io_uring_recvmsg_payload(struct io_uring_recvmsg_out *o, struct msghdr *msgh); unsigned int io_uring_recvmsg_payload_length(struct io_uring_recvmsg_out *o, int buf_len, struct msghdr *msgh);
These functions are used to access data in the payload delivered by io_uring_prep_recvmsg_multishot(3). msgh should point to the struct msghdr submitted with the request. io_uring_recvmsg_validate(3) will validate a buffer delivered by io_uring_prep_recvmsg_multishot(3) and extract the io_uring_recvmsg_out if it is valid, returning a pointer to it or else NULL. The structure is defined as follows: struct io_uring_recvmsg_out { __u32 namelen; /* Name byte count as would have been populated * by recvmsg(2) */ __u32 controllen; /* Control byte count */ __u32 payloadlen; /* Payload byte count as would have been returned * by recvmsg(2) */ __u32 flags; /* Flags result as would have been populated * by recvmsg(2) */ }; * io_uring_recvmsg_name(3) returns a pointer to the name in the buffer. * io_uring_recvmsg_cmsg_firsthdr(3) returns a pointer to the first cmsg in the buffer, or NULL. * io_uring_recvmsg_cmsg_nexthdr(3) returns a pointer to the next cmsg in the buffer, or NULL. * io_uring_recvmsg_payload(3) returns a pointer to the payload in the buffer. * io_uring_recvmsg_payload_length(3) Calculates the usable payload length in bytes.
io_uring_prep_recvmsg_multishot(3)
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liburing-2.2 July 26, 2022 io_uring_recvmsg_out(3)
Pages that refer to this page: io_uring_prep_recvmsg(3), io_uring_prep_recvmsg_multishot(3)