[newlib-cygwin] Cygwin: AF_UNIX: Implement read, readv, recvfrom, write, writev, sendto

[Corinna Vinschen <corinna at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=5bb4cc1e6cfba2d3246bd72c419e89c54b15ad56

commit 5bb4cc1e6cfba2d3246bd72c419e89c54b15ad56
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Wed Mar 7 21:53:56 2018 +0100

    Cygwin: AF_UNIX: Implement read, readv, recvfrom, write, writev, sendto
    
    All of these functions just call recvfrom/sendmsg which are still TODO
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/fhandler_socket_unix.cc | 108 +++++++++++++++++++++++++++-------
 1 file changed, 88 insertions(+), 20 deletions(-)

diff --git a/winsup/cygwin/fhandler_socket_unix.cc b/winsup/cygwin/fhandler_socket_unix.cc
index 6eca668..d27cdad 100644
--- a/winsup/cygwin/fhandler_socket_unix.cc
+++ b/winsup/cygwin/fhandler_socket_unix.cc
@@ -1545,18 +1545,33 @@ fhandler_socket_unix::getpeereid (pid_t *pid, uid_t *euid, gid_t *egid)
 }
 
 ssize_t
-fhandler_socket_unix::recvfrom (void *ptr, size_t len, int flags,
-				struct sockaddr *from, int *fromlen)
+fhandler_socket_unix::recvmsg (struct msghdr *msg, int flags)
 {
   set_errno (EAFNOSUPPORT);
   return -1;
 }
 
 ssize_t
-fhandler_socket_unix::recvmsg (struct msghdr *msg, int flags)
+fhandler_socket_unix::recvfrom (void *ptr, size_t len, int flags,
+				struct sockaddr *from, int *fromlen)
 {
-  set_errno (EAFNOSUPPORT);
-  return -1;
+  struct iovec iov;
+  struct msghdr msg;
+  ssize_t ret;
+
+  iov.iov_base = ptr;
+  iov.iov_len = len;
+  msg.msg_name = from;
+  msg.msg_namelen = from && fromlen ? *fromlen : 0;
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_flags = 0;
+  ret = recvmsg (&msg, flags);
+  if (ret >= 0 && from && fromlen)
+    *fromlen = msg.msg_namelen;
+  return ret;
 }
 
 void __reg3
@@ -1564,42 +1579,95 @@ fhandler_socket_unix::read (void *ptr, size_t& len)
 {
   set_errno (EAFNOSUPPORT);
   len = 0;
+  struct iovec iov;
+  struct msghdr msg;
+
+  iov.iov_base = ptr;
+  iov.iov_len = len;
+  msg.msg_name = NULL;
+  msg.msg_namelen = 0;
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_flags = 0;
+  len = recvmsg (&msg, 0);
 }
 
 ssize_t __stdcall
-fhandler_socket_unix::readv (const struct iovec *, int iovcnt, ssize_t tot)
-{
-  set_errno (EAFNOSUPPORT);
-  return -1;
+fhandler_socket_unix::readv (const struct iovec *const iov, int iovcnt,
+			     ssize_t tot)
+{
+  struct msghdr msg;
+
+  msg.msg_name = NULL;
+  msg.msg_namelen = 0;
+  msg.msg_iov = (struct iovec *) iov;
+  msg.msg_iovlen = iovcnt;
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_flags = 0;
+  return recvmsg (&msg, 0);
 }
 
 ssize_t
-fhandler_socket_unix::sendto (const void *in_ptr, size_t len, int flags,
-			       const struct sockaddr *to, int tolen)
+fhandler_socket_unix::sendmsg (const struct msghdr *msg, int flags)
 {
   set_errno (EAFNOSUPPORT);
   return -1;
 }
 
 ssize_t
-fhandler_socket_unix::sendmsg (const struct msghdr *msg, int flags)
+fhandler_socket_unix::sendto (const void *in_ptr, size_t len, int flags,
+			       const struct sockaddr *to, int tolen)
 {
-  set_errno (EAFNOSUPPORT);
-  return -1;
+  struct iovec iov;
+  struct msghdr msg;
+
+  iov.iov_base = (void *) in_ptr;
+  iov.iov_len = len;
+  msg.msg_name = (void *) to;
+  msg.msg_namelen = to ? tolen : 0;
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_flags = 0;
+  return sendmsg (&msg, flags);
 }
 
 ssize_t __stdcall
 fhandler_socket_unix::write (const void *ptr, size_t len)
 {
-  set_errno (EAFNOSUPPORT);
-  return -1;
+  struct iovec iov;
+  struct msghdr msg;
+
+  iov.iov_base = (void *) ptr;
+  iov.iov_len = len;
+  msg.msg_name = NULL;
+  msg.msg_namelen = 0;
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_flags = 0;
+  return sendmsg (&msg, 0);
 }
 
 ssize_t __stdcall
-fhandler_socket_unix::writev (const struct iovec *, int iovcnt, ssize_t tot)
-{
-  set_errno (EAFNOSUPPORT);
-  return -1;
+fhandler_socket_unix::writev (const struct iovec *const iov, int iovcnt,
+			      ssize_t tot)
+{
+  struct msghdr msg;
+
+  msg.msg_name = NULL;
+  msg.msg_namelen = 0;
+  msg.msg_iov = (struct iovec *) iov;
+  msg.msg_iovlen = iovcnt;
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_flags = 0;
+  return sendmsg (&msg, 0);
 }
 
 int