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implement sendmmsg and recvmmsg

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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.
This commit is contained in:
Rich Felker 2014-06-19 23:01:15 -04:00
commit acb7e049b8
3 changed files with 55 additions and 0 deletions
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15
src/network/recvmmsg.c Normal file
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#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);
}