1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <error.h>
#include <fcntl.h>
#include <signal.h>
#include <poll.h>
#include <sys/time.h>
#define S0(x) (x ? x : "")
#include <dht.c>
int samomor = 0;
int periodično = 0;
int sigusr1 = 0;
void handler (int s) {
switch (s) {
case SIGINT:
case SIGTERM:
samomor++;
break;
case SIGALRM:
periodično++;
break;
case SIGUSR1:
sigusr1++;
break;
}
}
void found_torrent (struct dht * d __attribute__((unused)), const unsigned char * h) {
char buf[41];
bin2hex(buf, h, 20);
buf[40] = '\0';
L(stdout, "magnet:?xt=urn:btih:%s", buf);
}
int main (int argc, char ** argv) {
int r = 0;
struct dht * dht = NULL;
struct sigaction sigact = {
.sa_handler = handler,
.sa_flags = SA_RESTART
};
if (sigaction(SIGALRM, &sigact, NULL) == -1)
error_at_line(1, errno, __FILE__, __LINE__, "sigaction(SIGALRM)");
if (sigaction(SIGINT, &sigact, NULL) == -1)
error_at_line(2, errno, __FILE__, __LINE__, "sigaction(SIGINT)");
if (sigaction(SIGTERM, &sigact, NULL) == -1)
error_at_line(3, errno, __FILE__, __LINE__, "sigaction(SIGTERM)");
if (sigaction(SIGUSR1, &sigact, NULL) == -1)
error_at_line(4, errno, __FILE__, __LINE__, "sigaction(SIGUSR1)");
sigset_t sigset;
if (sigemptyset(&sigset) == -1)
error_at_line(5, errno, __FILE__, __LINE__, "sigemptyset");
if (sigaddset(&sigset, SIGUSR1) == -1)
error_at_line(6, errno, __FILE__, __LINE__, "sigaddset(SIGUSR1)");
if (sigaddset(&sigset, SIGALRM) == -1)
error_at_line(7, errno, __FILE__, __LINE__, "sigaddset(SIGALRM)");
if (sigprocmask(SIG_UNBLOCK, &sigset, NULL) == -1)
error_at_line(8, errno, __FILE__, __LINE__, "sigprocmask");
/* struct itimerval itimerval = {
.it_interval = {
.tv_sec = 60
}
};
if (setitimer(ITIMER_REAL, &itimerval, NULL) == -1)
error_at_line(9, errno, __FILE__, __LINE__, "setitimer"); */
if (argc != 1+1)
error_at_line(10, 0, __FILE__, __LINE__, "%s configfile.ben >> possible_torrents.L", S0(argv[0]));
int cf = open(argv[1], O_RDWR | O_CLOEXEC | O_CREAT, 00664);
if (cf == -1)
error_at_line(11, errno, __FILE__, __LINE__, "open(%s)", argv[1]);
struct stat statbuf;
if (fstat(cf, &statbuf) == -1) {
error_at_line(0, errno, __FILE__, __LINE__, "fstat(cf, &statbuf)");
r = 12;
goto r;
}
char * cfr = NULL;
if (statbuf.st_size && !(cfr = mmap(NULL, statbuf.st_size, PROT_READ, MAP_SHARED, cf, 0))) {
error_at_line(0, errno, __FILE__, __LINE__, "mmap(NULL, %ld, PROT_READ, MAP_SHARED, cf, 0)", statbuf.st_size);
r = 13;
goto r;
}
struct bencoding * config = bdecode(cfr, statbuf.st_size, replace);
dht = dht_init(config);
dht->possible_torrent = found_torrent;
free_bencoding(config);
struct torrent * torrent = torrent_init();
memcpy(torrent->hash, "\xdd\x82\x55\xec\xdc\x7c\xa5\x5f\xb0\xbb\xf8\x13\x23\xd8\x70\x62\xdb\x1f\x6d\x1c", 20);
torrent->type = announce | peers;
add_torrent(dht, torrent);
struct pollfd pollfd = {
.fd = dht->socket,
.events = POLLIN
};
w:
alarm(13*60);
while (poll(&pollfd, 1, -1) == 1)
work(dht);
if (errno == EINTR) {
if (sigusr1) {
sigusr1 = 0;
dht_print(stdout, dht);
goto w;
}
if (periodično) {
periodično = 0;
work(dht);
goto w;
}
if (!samomor) {
error_at_line(0, errno, __FILE__, __LINE__, "poll");
r = 114;
}
} else {
error_at_line(0, errno, __FILE__, __LINE__, "poll");
r = 115;
goto r;
}
config = persistent(dht);
dht_free(dht);
dht = NULL;
if (cfr && munmap(cfr, statbuf.st_size) == -1) {
error_at_line(0, errno, __FILE__, __LINE__, "munmap(cf, %ld)", statbuf.st_size);
r = 116;
goto r;
}
cfr = NULL;
if (ftruncate(cf, (statbuf.st_size = bencode_length(config))) == -1) {
error_at_line(0, errno, __FILE__, __LINE__, "ftruncate(cf, %ld)", statbuf.st_size);
r = 117;
goto r;
}
if (!(cfr = mmap(NULL, statbuf.st_size, PROT_WRITE, MAP_SHARED, cf, 0))) {
error_at_line(0, errno, __FILE__, __LINE__, "mmap(NULL, %ld, PROT_READ, MAP_SHARED, cf, 0)", statbuf.st_size);
r = 118;
goto r;
}
bencode(cfr, config);
free_bencoding(config);
config = NULL;
r:
if (dht) {
dht_free(dht);
dht = NULL;
}
if (cfr && munmap(cfr, statbuf.st_size) == -1)
error_at_line(0, errno, __FILE__, __LINE__, "munmap(cf, %ld)", statbuf.st_size);
if (close(cf) == -1)
error_at_line(0, errno, __FILE__, __LINE__, "close(cf)");
L(stderr, "exiting cleanly with status %d\n", r);
return r;
}
|
