[libvirt] [Test] Add API to tunnel channels
Attached is a simple test program to exercise virDomainOpenChannel that
echoes a toupper()'d string and exits. Edit the #defines as necessary
to match your setup. You'll need a channel defined in the guest similar
to:
<channel type="unix">
<source mode="bind" path="/tmp/guestfsd.sock"/>
<target type="virtio" name="org.libguestfs.channel.0"/>
</channel>
Run the test, and then inside of the VM, you should be able to:
[root@f17-minimal ~]# socat - /dev/virtio-ports/org.libguestfs.channel.0
hello world
HELLO WORLD
[root@f17-minimal ~]#
#include <ctype.h>
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <libvirt/libvirt.h>
#define CONNECT_URI "qemu+ssh://root@localhost/system"
#define DOMAIN "f17-minimal"
#define CHANNEL "org.libguestfs.channel.0"
#define BUF_SIZE 80
void upper(char *c)
{
while (*c != '\0') {
*c = toupper((unsigned char)*c);
c++;
}
}
int main(int argc, char *argv[])
{
virConnectPtr conn;
virDomainPtr dom;
virStreamPtr st;
int bytes_read;
char buf[BUF_SIZE];
if ((conn = virConnectOpen(CONNECT_URI)) == NULL)
errx(1, "virConnectOpen");
if ((dom = virDomainLookupByName(conn, DOMAIN)) == NULL)
errx(1, "virDomainLookupByName");
if ((st = virStreamNew(conn, 0)) == NULL)
errx(1, "virStreamNew");
if (virDomainOpenChannel(dom, CHANNEL, st, 0) == -1)
errx(1, "virDomainOpenChannel");
if ((bytes_read = virStreamRecv(st, buf, BUF_SIZE)) > 0) {
buf[bytes_read] = '\0';
upper(buf);
virStreamSend(st, buf, strnlen(buf, BUF_SIZE));
}
if (virStreamFinish(st) < 0)
errx(1, "virStreamFinish");
if (virStreamFree(st) < 0)
errx(1, "virStreamFree");
return 0;
}