* Failed to get interface list while using ioctl (WSAIoctl) compiled by cygwin
@ 2022-08-12 12:01 dragon
2022-08-12 12:22 ` Marco Atzeri
0 siblings, 1 reply; 2+ messages in thread
From: dragon @ 2022-08-12 12:01 UTC (permalink / raw)
To: cygwin
Hi,
Thans for your attention.
I had a problem doing porting the network part。I want to get a list of network devices that can be implemented on Linux with an ioctl interface. A set of ioctl interfaces is also provided on Windows called WSAIoctl with cmd SIO_GET_INTERFACE_LIST。The WSAIoctl interface is also encapsulated in cygwin and placed in /usr/include/w32api/, libs place in /usr/lib/w32api/ws2_32 .
The code implemented by this interface can work correctly after compilation in MinGW and MSVC environments. But the error code of 10045 is returned after cygwin compiles. I have tested on different win10 hosts with different cygwin1.dll, but it still returned 10045(not supported).
Cygwin winsup/cygwin/fhandler/socket_inet.cc also called WSAIoctl,it should workable, I don't understand why return error.
I am new to cygwin,locating the issue was a bit difficult for me and hope to be able to get your help and response.
Thank you very much
The system environment and test code is as follows:
host: windows 10 (17134)
cygwin version: 3.3.5
gcc version: 11.3.0
gcc cmd: gcc -C test.c -o test.exe -lws2_32
minGw cmd: x86_64-w64-mingw32-gcc test.c -o test.exe -lws2_32
test code is very simple, just like this:
#include <winsock2.h>
#include <ws2tcpip.h>
int main (int argc, char *argv[]){
int s = SOCKET_ERROR;
INTERFACE_INFO IOInfo[16];
int ByteRet = 0;
WSADATA wsa;
int err = 0;
if (WSAStartup (MAKEWORD(2,2), &wsa) != 0) {
return -1;
}
s = WSASocket (AF_INET, SOCK_DGRAM, IPPROTO_IP, 0, 0, 0);
if (s == SOCKET_ERROR){
return -1;
}
err = WSAIoctl (s, SIO_GET_INTERFACE_LIST, 0 ,0 ,&IOInfo, sizeof (IOInfo), &ByteRet, 0 ,0);
if (err != 0) {
err = WSAGetLastError ();
printf ("err:%d\r\n", err);
return -err;
}
return 0;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Failed to get interface list while using ioctl (WSAIoctl) compiled by cygwin
2022-08-12 12:01 Failed to get interface list while using ioctl (WSAIoctl) compiled by cygwin dragon
@ 2022-08-12 12:22 ` Marco Atzeri
0 siblings, 0 replies; 2+ messages in thread
From: Marco Atzeri @ 2022-08-12 12:22 UTC (permalink / raw)
To: cygwin
[-- Attachment #1: Type: text/plain, Size: 834 bytes --]
On 12.08.2022 14:01, dragon wrote:
> Hi,
>
> Thans for your attention.
>
> I had a problem doing porting the network part。I want to get a list of network devices that can be implemented on Linux with an ioctl interface. A set of ioctl interfaces is also provided on Windows called WSAIoctl with cmd SIO_GET_INTERFACE_LIST。The WSAIoctl interface is also encapsulated in cygwin and placed in /usr/include/w32api/, libs place in /usr/lib/w32api/ws2_32 .
mixing Posix and W32 API is seldom a good idea.
The attached code provides the full list of Network interface and
some details as
internal_name: {E9617ED6-8C03-4C53-AA3F-4FD6DBC596D5}
flags: AF_INET6 up multicast
address: fe80::9cbb:5d97:6ef:565%22
friendly_name: LAN-Verbindung* 2
feel free to modify it for your purpose
Regards
Marco
[-- Attachment #2: get-interface.c --]
[-- Type: text/plain, Size: 2969 bytes --]
/* #define _GNU_SOURCE * To get defns of NI_MAXSERV and NI_MAXHOST */
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netdb.h>
#include <ifaddrs.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <net/if.h>
void print_flags(unsigned int flags)
{
const char* sep = "", *sp = " ";
if (flags & IFF_UP) {
printf("%sup", sep);
sep = sp;
}
if (flags & IFF_BROADCAST) {
printf("%sbroadcast", sep);
sep = sp;
}
if (flags & IFF_LOOPBACK) {
printf("%sloopback", sep);
sep = sp;
}
if (flags & IFF_NOTRAILERS) {
printf("%snotrailers", sep);
sep = sp;
}
if (flags & IFF_RUNNING) {
printf("%srunning", sep);
sep = sp;
}
if (flags & IFF_PROMISC) {
printf("%spromisc", sep);
sep = sp;
}
if (flags & IFF_MULTICAST) {
printf("%smulticast", sep);
sep = sp;
}
}
int main(int argc, char *argv[])
{
struct ifaddrs *ifaddr, *ifa;
int family, s, n;
char host[NI_MAXHOST];
struct ifreq ifr;
struct ifreq_frndlyname iff;
struct ifreq_frndlyname * iffp;
struct ifaddrs_hwdata * ifhwdata;
if (getifaddrs(&ifaddr) == -1) {
perror("getifaddrs");
exit(EXIT_FAILURE);
}
/* Walk through linked list, maintaining head pointer so we
can free list later */
for (ifa = ifaddr, n = 0; ifa != NULL; ifa = ifa->ifa_next, n++) {
if (ifa->ifa_addr == NULL)
continue;
family = ifa->ifa_addr->sa_family;
/* Display interface name and family (including symbolic
form of the latter for the common families) */
printf("internal_name: \t%s\n",ifa->ifa_name);
printf(" flags: \t%s ",
(family == AF_INET) ? "AF_INET " :
(family == AF_INET6) ? "AF_INET6" : "unknown ");
print_flags(ifa->ifa_flags);
printf("\n");
/* For an AF_INET* interface address, display the address */
if (family == AF_INET || family == AF_INET6) {
s = getnameinfo(ifa->ifa_addr,
(family == AF_INET) ? sizeof(struct sockaddr_in) :
sizeof(struct sockaddr_in6),
host, NI_MAXHOST,
NULL, 0, NI_NUMERICHOST);
if (s != 0) {
printf("getnameinfo() failed: %s\n", gai_strerror(s));
exit(EXIT_FAILURE);
}
printf(" address:\t%s\n", host);
ifhwdata=ifa->ifa_data;
iffp=&(ifhwdata->ifa_frndlyname);
printf(" friendly_name:\t%s\n\n", iffp->ifrf_friendlyname);
}
}
freeifaddrs(ifaddr);
exit(EXIT_SUCCESS);
}
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-08-12 12:01 Failed to get interface list while using ioctl (WSAIoctl) compiled by cygwin dragon
2022-08-12 12:22 ` Marco Atzeri
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