mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-28 07:18:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Add sendmsg and recvmsg (#148)

Browse source
This commit is contained in:
fabriziobertocci 2021-04-08 01:53:23 -04:00 • committed by GitHub
parent da8a08fd58
commit 24d79599cc
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 184 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

54
libc/sock/recvmsg.c Normal file
View file

@ -0,0 +1,54 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/iovec.h"
#include "libc/dce.h"
#include "libc/sock/internal.h"
#include "libc/sock/sock.h"
#include "libc/str/str.h"
#include "libc/sysv/errfuns.h"
/**
* Sends a message from a socket.
*
* @param fd is the file descriptor returned by socket()
* @param msg is a pointer to a struct msghdr containing all the allocated
* buffers where to store incoming data.
* @param flags MSG_OOB, MSG_DONTROUTE, MSG_PARTIAL, MSG_NOSIGNAL, etc.
* @return number of bytes received, or -1 w/ errno
* @error EINTR, EHOSTUNREACH, ECONNRESET (UDP ICMP Port Unreachable),
* EPIPE (if MSG_NOSIGNAL), EMSGSIZE, ENOTSOCK, EFAULT, etc.
* @asyncsignalsafe
*/
ssize_t recvmsg(int fd, struct msghdr *msg, int flags) {
if (!IsWindows()) {
ssize_t got = sys_recvmsg(fd, msg, flags);
/* An address was provided, convert from BSD form */
if (msg->msg_name && IsBsd() && got != -1) {
sockaddr2linux(msg->msg_name);
}
return got;
} else if (__isfdkind(fd, kFdSocket)) {
return sys_recvfrom_nt(&g_fds.p[fd], msg->msg_iov, msg->msg_iovlen, flags,
msg->msg_name, &msg->msg_namelen);
} else {
return ebadf();
}
}