HedongGao opened a new pull request, #17705:
URL: https://github.com/apache/nuttx/pull/17705
## Summary
In some scenarios, we only want to configure device related properties
through ioctl, and do not want to rely on other protocols, so we abstract a
g_ctrl_sockif.
## Impact
When users want to set dev related ioctl, they do not need to rely on other
protocols.
## Testing
`
#include <stdio.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <assert.h>
#include <unistd.h>
int main(void)
{
int sockfd;
int ret;
int dummy = 0;
// Create a control socket
sockfd = socket(AF_UNSPEC, SOCK_CTRL, 0);
if (sockfd < 0)
{
perror("socket(SOCK_CTRL)");
printf("Test FAILED: Could not create control socket\n");
return 1;
}
printf("Control socket created: fd=%d\n", sockfd);
// Try an ioctl operation (should fail with ENOTTY or ENOSYS if not
implemented)
ret = ioctl(sockfd, 0x1234, &dummy);
if (ret < 0)
{
printf("ioctl returned error as expected: %d (%s)\n", errno,
strerror(errno));
// Acceptable: ENOTTY, ENOSYS, or other not supported
}
else
{
printf("ioctl returned success (unexpected for unimplemented
command)\n");
}
// Close the control socket
if (close(sockfd) < 0)
{
perror("close");
printf("Test FAILED: Could not close control socket\n");
return 1;
}
printf("Test PASSED: g_ctrl_sockif setup/close and ioctl behavior
checked\n");
return 0;
}
`
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