#define _GNU_SOURCE
#include <sched.h>
#include <stdint.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

static void execute1(const int fd)
{
	//  sendmsg$nl_route arguments: [
	//    fd: sock_nl_route (resource)
	//    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
	//      msghdr_netlink[netlink_msg_route] {
	//        addr: nil
	//        addrlen: len = 0x0 (4 bytes)
	//        pad = 0x0 (4 bytes)
	//        vec: ptr[in, iovec[in, netlink_msg_route]] {
	//          iovec[in, netlink_msg_route] {
	//            addr: ptr[in, netlink_msg_route] {
	//              union netlink_msg_route {
	//                ipv6_newnexthop: netlink_msg_t[const[RTM_NEWNEXTHOP, int16],
	//                nhmsg_new[AF_INET6], rtm_nh_policy_new] {
	//                  len: len = 0x1c (4 bytes)
	//                  type: const = 0x68 (2 bytes)
	//                  flags: netlink_msg_flags = 0x5fb9a818fb7378e9 (2 bytes)
	//                  seq: int32 = 0x0 (4 bytes)
	//                  pid: int32 = 0x0 (4 bytes)
	//                  payload: nhmsg[AF_INET6, flags[rtm_protocol, int8],
	//                  flags[rtnh_flags, int32]] {
	//                    nh_family: const = 0xa (1 bytes)
	//                    nh_scope: const = 0x0 (1 bytes)
	//                    nh_protocol: rtm_protocol = 0x0 (1 bytes)
	//                    resvd: const = 0x0 (1 bytes)
	//                    nh_flags: rtnh_flags = 0x0 (4 bytes)
	//                  }
	//                  attrs: array[rtm_nh_policy_new] {
	//                    union rtm_nh_policy_new {
	//                      NHA_BLACKHOLE: nlattr_t[const[NHA_BLACKHOLE, int16],
	//                      void] {
	//                        nla_len: offsetof = 0x4 (2 bytes)
	//                        nla_type: const = 0x4 (2 bytes)
	//                        payload: buffer: {} (length 0x0)
	//                        size: buffer: {} (length 0x0)
	//                      }
	//                    }
	//                  }
	//                }
	//              }
	//            }
	//            len: len = 0x1c (8 bytes)
	//          }
	//        }
	//        vlen: const = 0x1 (8 bytes)
	//        ctrl: const = 0x0 (8 bytes)
	//        ctrllen: const = 0x0 (8 bytes)
	//        f: send_flags = 0x0 (4 bytes)
	//        pad = 0x0 (4 bytes)
	//      }
	//    }
	//    f: send_flags = 0x0 (8 bytes)
	//  ]
	*(uint64_t*)0x200000000100 = 0;
	*(uint32_t*)0x200000000108 = 0;
	*(uint64_t*)0x200000000110 = 0x2000000000c0;
	*(uint64_t*)0x2000000000c0 = 0x200000000140;
	*(uint32_t*)0x200000000140 = 0x1c;
	*(uint16_t*)0x200000000144 = 0x68;
	*(uint16_t*)0x200000000146 = 0x78e9;
	*(uint32_t*)0x200000000148 = 0;
	*(uint32_t*)0x20000000014c = 0;
	*(uint8_t*)0x200000000150 = 0xa;
	*(uint8_t*)0x200000000151 = 0;
	*(uint8_t*)0x200000000152 = 0;
	*(uint8_t*)0x200000000153 = 0;
	*(uint32_t*)0x200000000154 = 0;
	*(uint16_t*)0x200000000158 = 4;
	*(uint16_t*)0x20000000015a = 4;
	*(uint64_t*)0x2000000000c8 = 0x1c;
	*(uint64_t*)0x200000000118 = 1;
	*(uint64_t*)0x200000000120 = 0;
	*(uint64_t*)0x200000000128 = 0;
	*(uint32_t*)0x200000000130 = 0;
	syscall(__NR_sendmsg, /*fd=*/fd, /*msg=*/0x200000000100ul, /*f=*/0ul);
}

static void execute2(const int fd)
{
	//  sendmsg$nl_route arguments: [
	//    fd: sock_nl_route (resource)
	//    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
	//      msghdr_netlink[netlink_msg_route] {
	//        addr: nil
	//        addrlen: len = 0x0 (4 bytes)
	//        pad = 0x0 (4 bytes)
	//        vec: ptr[in, iovec[in, netlink_msg_route]] {
	//          iovec[in, netlink_msg_route] {
	//            addr: ptr[inout, array[ANYUNION]] {
	//              array[ANYUNION] {
	//                union ANYUNION {
	//                  ANYBLOB: buffer: {30 00 00 00 18 00 dd 8d 00 00 00 00 00
	//                  00 00 00 02 00 00 00 00 00 00 06 00 00 00 00 08 00 1e 00
	//                  02} (length 0x21)
	//                }
	//              }
	//            }
	//            len: len = 0x30 (8 bytes)
	//          }
	//        }
	//        vlen: const = 0x1 (8 bytes)
	//        ctrl: const = 0x0 (8 bytes)
	//        ctrllen: const = 0x0 (8 bytes)
	//        f: send_flags = 0x0 (4 bytes)
	//        pad = 0x0 (4 bytes)
	//      }
	//    }
	//    f: send_flags = 0x4090 (8 bytes)
	//  ]
	*(uint64_t*)0x200000000180 = 0;
	*(uint32_t*)0x200000000188 = 0;
	*(uint64_t*)0x200000000190 = 0x200000000780;
	*(uint64_t*)0x200000000780 = 0x200000000380;
	memcpy((void*)0x200000000380,
	       "\x30\x00\x00\x00\x18\x00\xdd\x8d\x00\x00\x00\x00\x00\x00\x00\x00\x02"
	       "\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x08\x00\x1e\x00\x02",
	       33);
	*(uint64_t*)0x200000000788 = 0x30;
	*(uint64_t*)0x200000000198 = 1;
	*(uint64_t*)0x2000000001a0 = 0;
	*(uint64_t*)0x2000000001a8 = 0;
	*(uint32_t*)0x2000000001b0 = 0;
	syscall(__NR_sendmsg, /*fd=*/fd, /*msg=*/0x200000000180ul,
		/*f=MSG_PROBE|MSG_NOSIGNAL|MSG_EOR*/ 0x4090ul);
}

int main(int argc, char *argv[])
{
	syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
		/*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
		/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
		/*fd=*/(intptr_t)-1, /*offset=*/0ul);
	if (unshare(CLONE_NEWNET))
		return 1;
	int fd = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
	if (fd == -1)
		return 1;
	execute1(fd);
	execute1(fd);
	execute2(fd);
	return 0;
}