Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 

81 lines
1.5 KiB

#ifdef __MINGW32__
#include <errno.h>
#include "io_internal.h"
int64 io_receivefd(int64 sock) {
errno=EINVAL;
return -1;
}
#else
#ifdef __NetBSD__
#define _NETBSD_SOURCE
#endif
#define _XOPEN_SOURCE
#define _XOPEN_SOURCE_EXTENDED 1
#include <stddef.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <errno.h>
#include "io_internal.h"
union fdmsg {
struct cmsghdr h;
char buf[1000];
};
int64 io_receivefd(int64 sock) {
struct iovec iov;
struct msghdr msg;
#ifdef CMSG_FIRSTHDR
union fdmsg cmsg;
struct cmsghdr* h;
#else
int fd;
#endif
char x;
char name[100];
iov.iov_base=&x;
iov.iov_len=1;
msg.msg_name=name;
msg.msg_namelen=100;
#ifdef CMSG_FIRSTHDR
msg.msg_control=cmsg.buf;
msg.msg_controllen=sizeof(union fdmsg);
#else
msg.msg_accrights=(char*)&fd;
msg.msg_accrightslen=sizeof(fd);
#endif
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
#ifdef CMSG_FIRSTHDR
msg.msg_flags=0;
h=CMSG_FIRSTHDR(&msg);
#ifndef CMSG_LEN
#define CMSG_LEN(x) x
#endif
h->cmsg_len=CMSG_LEN(sizeof(int));
h->cmsg_level=SOL_SOCKET;
h->cmsg_type=SCM_RIGHTS;
*((int*)CMSG_DATA(h))=-1;
#endif
if (recvmsg(sock,&msg,0)==-1)
return -1;
#ifdef CMSG_FIRSTHDR
h=CMSG_FIRSTHDR(&msg);
if (!h || h->cmsg_len!=CMSG_LEN(sizeof(int)) || h->cmsg_level!=SOL_SOCKET || h->cmsg_type!=SCM_RIGHTS) {
#ifdef EPROTO
errno=EPROTO;
#else
errno=EINVAL;
#endif
return -1;
}
return *((int*)CMSG_DATA(h));
#else
if (msg.msg_accrightslen != sizeof(fd)) return -1;
return fd;
#endif
}
#endif