Eric Lee / smarc-fsl-linux-kernel

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net/bpfilter/main.c 1.06 KB
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d2ba09c17   Alexei Starovoitov   net: add skeleton... 
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  // SPDX-License-Identifier: GPL-2.0
  #define _GNU_SOURCE
  #include <sys/uio.h>
  #include <errno.h>
  #include <stdio.h>
  #include <sys/socket.h>
  #include <fcntl.h>
  #include <unistd.h>
303a339f3   Masahiro Yamada   bpfilter: remove ... 
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  #include "../../include/uapi/linux/bpf.h"
d2ba09c17   Alexei Starovoitov   net: add skeleton... 
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  #include <asm/unistd.h>
  #include "msgfmt.h"
  
  int debug_fd;
  
  static int handle_get_cmd(struct mbox_request *cmd)
  {
  	switch (cmd->cmd) {
  	case 0:
  		return 0;
  	default:
  		break;
  	}
  	return -ENOPROTOOPT;
  }
  
  static int handle_set_cmd(struct mbox_request *cmd)
  {
  	return -ENOPROTOOPT;
  }
  
  static void loop(void)
  {
  	while (1) {
  		struct mbox_request req;
  		struct mbox_reply reply;
  		int n;
  
  		n = read(0, &req, sizeof(req));
  		if (n != sizeof(req)) {
  			dprintf(debug_fd, "invalid request %d
  ", n);
  			return;
  		}
  
  		reply.status = req.is_set ?
  			handle_set_cmd(&req) :
  			handle_get_cmd(&req);
  
  		n = write(1, &reply, sizeof(reply));
  		if (n != sizeof(reply)) {
  			dprintf(debug_fd, "reply failed %d
  ", n);
  			return;
  		}
  	}
  }
  
  int main(void)
  {
36c4357c6   Gary Lin   net: bpfilter: pr... 
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  	debug_fd = open("/dev/kmsg", 00000002);
d2ba09c17   Alexei Starovoitov   net: add skeleton... 
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  	dprintf(debug_fd, "Started bpfilter
  ");
  	loop();
  	close(debug_fd);
  	return 0;
  }