mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
65 lines
3 KiB
C
65 lines
3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2022 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/intrin/kprintf.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/serialize.h"
|
|
#include "libc/sock/sock.h"
|
|
#include "libc/sock/struct/sockaddr.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/af.h"
|
|
#include "libc/sysv/consts/ex.h"
|
|
#include "libc/sysv/consts/sock.h"
|
|
#include "net/http/http.h"
|
|
#include "net/http/ip.h"
|
|
|
|
int main(int argc, char *argv[]) {
|
|
|
|
if (argc < 2) {
|
|
kprintf("usage: blackhole IP...\n");
|
|
return EX_USAGE;
|
|
}
|
|
|
|
int fd;
|
|
struct sockaddr_un addr = {AF_UNIX, "/var/run/blackhole.sock"};
|
|
if ((fd = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1) {
|
|
kprintf("error: socket(AF_UNIX) failed: %s\n", strerror(errno));
|
|
return 3;
|
|
}
|
|
|
|
int rc = 0;
|
|
for (int i = 1; i < argc; ++i) {
|
|
int64_t ip;
|
|
char buf[4];
|
|
if ((ip = ParseIp(argv[i], -1)) != -1) {
|
|
WRITE32BE(buf, ip);
|
|
if (sendto(fd, buf, 4, 0, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
|
|
kprintf("error: sendto(%#s) failed: %s\n", addr.sun_path,
|
|
strerror(errno));
|
|
rc |= 2;
|
|
}
|
|
} else {
|
|
kprintf("error: bad ipv4 address: %s\n", argv[i]);
|
|
rc |= 1;
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|