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* cygwin.din: Add recvmsg and sendmsg.

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* net.cc: Add cygwin_recvmsg and cygwin_sendmsg.
        * /usr/include/sys/socket.h: Add recvmsg and sendmsg.
This commit is contained in:
Corinna Vinschen
2002-01-19 16:11:00 +00:00
parent 2d3dab2ea5
commit 7d6be0d616
4 changed files with 71 additions and 0 deletions
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61
winsup/cygwin/net.cc
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@@ -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;
}