From acb7e049b8c70b9e6ad57e8601373f9c991a0da4 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 19 Jun 2014 23:01:15 -0400
Subject: implement sendmmsg and recvmmsg

these are not pure syscall wrappers because they have to work around
kernel API bugs on 64-bit archs. the workarounds could probably be
made somewhat more efficient, but at the cost of more complexity. this
may be revisited later.
---
 src/network/recvmmsg.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 src/network/recvmmsg.c

(limited to 'src/network/recvmmsg.c')

diff --git a/src/network/recvmmsg.c b/src/network/recvmmsg.c
new file mode 100644
index 00000000..58b1b2f6
--- /dev/null
+++ b/src/network/recvmmsg.c
@@ -0,0 +1,15 @@
+#define _GNU_SOURCE
+#include <sys/socket.h>
+#include <limits.h>
+#include "syscall.h"
+
+int recvmmsg(int fd, struct mmsghdr *msgvec, unsigned int vlen, unsigned int flags, struct timespec *timeout)
+{
+#if LONG_MAX > INT_MAX
+	struct mmsghdr *mh = msgvec;
+	unsigned int i;
+	for (i = vlen; i; i--, mh++)
+		mh->msg_hdr.__pad1 = mh->msg_hdr.__pad2 = 0;
+#endif
+	return syscall_cp(SYS_recvmmsg, fd, msgvec, vlen, flags, timeout);
+}
-- 
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