* cygwin.din: Add recvmsg and sendmsg.

* net.cc: Add cygwin_recvmsg and cygwin_sendmsg.
        * /usr/include/sys/socket.h: Add recvmsg and sendmsg.

winsup/cygwin/ChangeLog

@@ -1,3 +1,9 @@
+2002-01-19  Mark Bradshaw  <bradshaw@staff.crosswalk.com>
+
+        * cygwin.din: Add recvmsg and sendmsg.
+        * net.cc: Add cygwin_recvmsg and cygwin_sendmsg.
+        * /usr/include/sys/socket.h: Add recvmsg and sendmsg.
+
 2002-01-19  Corinna Vinschen  <corinna@vinschen.de>
 
 	* security.cc (create_token): Close processes token handle as soon

winsup/cygwin/cygwin.din

@@ -1036,6 +1036,8 @@ setsockopt = cygwin_setsockopt
 inet_aton = cygwin_inet_aton
 inet_ntoa = cygwin_inet_ntoa
 recvfrom = cygwin_recvfrom
+recvmsg = cygwin_recvmsg
+sendmsg = cygwin_sendmsg
 sendto = cygwin_sendto
 shutdown = cygwin_shutdown
 sethostent

winsup/cygwin/include/sys/socket.h

@@ -35,7 +35,9 @@ extern "C"
   int recv (int, void *__buff, int __len, unsigned int __flags);
   int recvfrom (int, char *__buff, int __len, int __flags,
 			 struct sockaddr *__from, int *__fromlen);
+  int recvmsg(int s, struct msghdr *msg, int flags);
   int send (int, const void *__buff, int __len, unsigned int __flags);
+  int sendmsg(int s, const struct msghdr *msg, int flags);
   int sendto (int, const void *, int, unsigned int, const struct sockaddr *, int);
   int setsockopt (int __s, int __level, int __optname, const void *optval, int __optlen);
   int getsockopt (int __s, int __level, int __optname, void *__optval, int *__optlen);

winsup/cygwin/net.cc

@@ -34,6 +34,7 @@ details. */
 #include "sigproc.h"
 #include "pinfo.h"
 #include "registry.h"
+#include <sys/uio.h>
 
 extern "C" {
 int h_errno;
@@ -2519,3 +2520,63 @@ extern "C" void
 endhostent (void)
 {
 }
+
+/* exported as recvmsg: standards? */
+extern "C" int 
+cygwin_recvmsg(int s, struct msghdr *msg, int flags)
+{
+    int ret, nb;
+    size_t tot = 0;
+    int i;
+    char *buf, *p;
+    struct iovec *iov = msg->msg_iov;
+
+    for(i = 0; i < msg->msg_iovlen; ++i)
+	tot += iov[i].iov_len;
+    buf = (char *) malloc(tot);
+    if (tot != 0 && buf == NULL) {
+	errno = ENOMEM;
+	return -1;
+    }
+    nb = ret = cygwin_recvfrom (s, buf, tot, flags, 
+      (struct sockaddr *) msg->msg_name, (int *) &msg->msg_namelen);
+    p = buf;
+    while (nb > 0) {
+	ssize_t cnt = min(nb, iov->iov_len);
+
+	memcpy (iov->iov_base, p, cnt);
+	p += cnt;
+	nb -= cnt;
+	++iov;
+    }
+    free(buf);
+    return ret;
+}
+
+/* exported as sendmsg: standards? */
+extern "C" int
+cygwin_sendmsg(int s, const struct msghdr *msg, int flags)
+{
+    int ret;
+    size_t tot = 0;
+    int i;
+    char *buf, *p;
+    struct iovec *iov = msg->msg_iov;
+
+    for(i = 0; i < msg->msg_iovlen; ++i)
+	tot += iov[i].iov_len;
+    buf = (char *) malloc(tot);
+    if (tot != 0 && buf == NULL) {
+	errno = ENOMEM;
+	return -1;
+    }
+    p = buf;
+    for (i = 0; i < msg->msg_iovlen; ++i) {
+	memcpy (p, iov[i].iov_base, iov[i].iov_len);
+	p += iov[i].iov_len;
+    }
+    ret = cygwin_sendto (s, buf, tot, flags, 
+      (struct sockaddr *) msg->msg_name, msg->msg_namelen);
+    free (buf);
+    return ret;
+}