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linux(4): Avoid EISCONN if addr is specified for sendto()

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If the socket is in a connected state, the target address should be
ignored.

MFC after:		2 weeks
This commit is contained in:
Dmitry Chagin 2022-05-28 23:42:09 +03:00
parent e8d9d8082b
commit db48fa8319
1 changed files with 14 additions and 4 deletions
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18
sys/compat/linux/linux_socket.c
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@ -1238,19 +1238,29 @@ linux_sendto(struct thread *td, struct linux_sendto_args *args)
{
struct msghdr msg;
struct iovec aiov;
struct socket *so;
struct file *fp;
int error;
if (linux_check_hdrincl(td, args->s) == 0)
/* IP_HDRINCL set, tweak the packet before sending */
return (linux_sendto_hdrincl(td, args));
msg.msg_name = PTRIN(args->to);
msg.msg_namelen = args->tolen;
bzero(&msg, sizeof(msg));
error = getsock_cap(td, args->s, &cap_send_connect_rights,
&fp, NULL, NULL);
if (error != 0)
return (error);
so = fp->f_data;
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0) {
msg.msg_name = PTRIN(args->to);
msg.msg_namelen = args->tolen;
}
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
msg.msg_control = NULL;
msg.msg_flags = 0;
aiov.iov_base = PTRIN(args->msg);
aiov.iov_len = args->len;
fdrop(fp, td);
return (linux_sendit(td, args->s, &msg, args->flags, NULL,
UIO_USERSPACE));
}