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mISDN: switch to sock_recvmsg()

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here we do need to reinitialize ->msg_iter on each call - the
data in buffer is overwritten every time, not appended to.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-09-20 20:11:00 -04:00
parent f7765c3646
commit 956a27ecfa
1 changed files with 9 additions and 13 deletions
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22
drivers/isdn/mISDN/l1oip_core.c
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@ -645,8 +645,10 @@ l1oip_socket_thread(void *data)
{
struct l1oip *hc = (struct l1oip *)data;
int ret = 0;
struct msghdr msg;
struct sockaddr_in sin_rx;
struct kvec iov;
struct msghdr msg = {.msg_name = &sin_rx,
.msg_namelen = sizeof(sin_rx)};
unsigned char *recvbuf;
size_t recvbuf_size = 1500;
int recvlen;
@ -661,6 +663,9 @@ l1oip_socket_thread(void *data)
goto fail;
}
iov.iov_base = recvbuf;
iov.iov_len = recvbuf_size;
/* make daemon */
allow_signal(SIGTERM);
@ -697,12 +702,6 @@ l1oip_socket_thread(void *data)
goto fail;
}
/* build receive message */
msg.msg_name = &sin_rx;
msg.msg_namelen = sizeof(sin_rx);
msg.msg_control = NULL;
msg.msg_controllen = 0;
/* build send message */
hc->sendmsg.msg_name = &hc->sin_remote;
hc->sendmsg.msg_namelen = sizeof(hc->sin_remote);
@ -719,12 +718,9 @@ l1oip_socket_thread(void *data)
printk(KERN_DEBUG "%s: socket created and open\n",
__func__);
while (!signal_pending(current)) {
struct kvec iov = {
.iov_base = recvbuf,
.iov_len = recvbuf_size,
};
recvlen = kernel_recvmsg(socket, &msg, &iov, 1,
recvbuf_size, 0);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1,
recvbuf_size);
recvlen = sock_recvmsg(socket, &msg, 0);
if (recvlen > 0) {
l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen);
} else {