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net/sendmsg: workaround to support multi-iov case

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Change-Id: I66e538c2f3a13db2f84eec9a3f364cf21902c5d1
Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an
2020-06-09 12:23:29 +08:00
committed by chao an
parent 65b95eea6f
commit 2898b4a71a
1 changed files with 32 additions and 7 deletions
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libs/libc/net/lib_sendmsg.c
+32 -7
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@@ -45,6 +45,8 @@
#include <sys/socket.h>
#include <errno.h>
#include "libc.h"
/****************************************************************************
* Public Functions
****************************************************************************/
@@ -70,20 +72,43 @@
ssize_t sendmsg(int sockfd, FAR struct msghdr *msg, int flags)
{
FAR void *buf = msg->msg_iov->iov_base;
FAR struct sockaddr *to = msg->msg_name;
socklen_t tolen = msg->msg_namelen;
size_t len = msg->msg_iov->iov_len;
socklen_t tolen = msg->msg_namelen;
FAR struct iovec *iov;
FAR struct iovec *end;
FAR void *buf;
size_t len;
int ret;
if (msg->msg_iovlen == 1)
{
return sendto(sockfd, buf, len, flags, to, tolen);
return sendto(sockfd, msg->msg_iov->iov_base,
msg->msg_iov->iov_len, flags, to, tolen);
}
else
end = &msg->msg_iov[msg->msg_iovlen];
for (len = 0, iov = msg->msg_iov; iov != end; iov++)
{
set_errno(ENOTSUP);
return ERROR;
len += iov->iov_len;
}
buf = lib_malloc(len);
if (buf == NULL)
{
return -ENOMEM;
}
for (len = 0, iov = msg->msg_iov; iov != end; iov++)
{
memcpy(buf + len, iov->iov_base, iov->iov_len);
len += iov->iov_len;
}
ret = sendto(sockfd, buf, len, flags, to, tolen);
lib_free(buf);
return ret;
}
#endif /* CONFIG_NET && !CONFIG_NET_CMSG */