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#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <string.h>
#include <unistd.h>
#include "btpd.h"
HTBL_TYPE(numtbl, tlib, unsigned, num, nchain);
HTBL_TYPE(hashtbl, tlib, uint8_t, hash, hchain);
static unsigned m_nextnum;
static unsigned m_ntlibs;
static struct numtbl *m_numtbl;
static struct hashtbl *m_hashtbl;
unsigned
tlib_count(void)
{
return m_ntlibs;
}
struct tlib *
tlib_by_num(unsigned num)
{
return numtbl_find(m_numtbl, &num);
}
struct tlib *
tlib_by_hash(const uint8_t *hash)
{
return hashtbl_find(m_hashtbl, hash);
}
void
tlib_kill(struct tlib *tl)
{
numtbl_remove(m_numtbl, &tl->num);
hashtbl_remove(m_hashtbl, tl->hash);
free(tl);
m_ntlibs--;
}
struct tlib *
tlib_create(const uint8_t *hash)
{
struct tlib *tl = btpd_calloc(1, sizeof(*tl));
char hex[SHAHEXSIZE];
bin2hex(hash, hex, 20);
tl->num = m_nextnum;
bcopy(hash, tl->hash, 20);
m_nextnum++;
m_ntlibs++;
numtbl_insert(m_numtbl, tl);
hashtbl_insert(m_hashtbl, tl);
return tl;
}
int
tlib_del(struct tlib *tl)
{
char relpath[RELPATH_SIZE];
char cmd[PATH_MAX];
assert(tl->tp == NULL);
snprintf(cmd, PATH_MAX, "rm -r torrents/%s",
bin2hex(tl->hash, relpath, 20));
system(cmd);
tlib_kill(tl);
return 0;
}
static int
valid_info(char *buf, size_t len)
{
size_t slen;
if (benc_validate(buf, len) != 0)
return 0;
if (benc_dget_mem(buf, "name", &slen) == NULL || slen == 0)
return 0;
if ((benc_dget_mem(buf, "dir", &slen) == NULL ||
(slen == 0 || slen >= PATH_MAX)))
return 0;
return 1;
}
static void
load_info(struct tlib *tl, const char *path)
{
size_t size = 1 << 14;
char buf[size], *p = buf;
if ((errno = read_whole_file((void **)&p, &size, path)) != 0) {
btpd_log(BTPD_L_ERROR, "couldn't load '%s' (%s).\n", path,
strerror(errno));
return;
}
if (!valid_info(buf, size)) {
btpd_log(BTPD_L_ERROR, "bad info file '%s'.\n", path);
return ;
}
tl->name = benc_dget_str(buf, "name", NULL);
tl->dir = benc_dget_str(buf, "dir", NULL);
#if 0
tl->t_added = benc_dget_int(buf, "time added");
tl->t_active = benc_dget_int(buf, "time active");
tl->tot_up = benc_dget_int(buf, "total upload");
tl->tot_down = benc_dget_int(buf, "total download");
#endif
if (tl->name == NULL || tl->dir == NULL)
btpd_err("out of memory.\n");
}
static void
save_info(struct tlib *tl, const char *path)
{
FILE *fp;
char wpath[PATH_MAX];
snprintf(wpath, PATH_MAX, "%s.write", path);
if ((fp = fopen(wpath, "w")) == NULL)
btpd_err("failed to open '%s' (%s).\n", wpath, strerror(errno));
fprintf(fp, "d3:dir%d:%s4:name%d:%s", (int)strlen(tl->dir), tl->dir,
(int)strlen(tl->name), tl->name);
#if 0
fprintf(fp, "11:time activei%lde10:time addedi%lde", tl->t_active,
tl->t_added);
fprintf(fp, "14:total downloadi%llde12:total uploadi%lldee", tl->tot_down,
tl->tot_up);
#else
fprintf(fp, "e");
#endif
if (ferror(fp) || fclose(fp) != 0)
btpd_err("failed to write '%s'.\n", wpath);
if (rename(wpath, path) != 0)
btpd_err("failed to rename: '%s' -> '%s' (%s).\n", wpath, path,
strerror(errno));
}
static void
write_torrent(const char *mi, size_t mi_size, const char *path)
{
FILE *fp;
if ((fp = fopen(path, "w")) == NULL)
goto err;
if (fwrite(mi, mi_size, 1, fp) != 1) {
errno = EIO;
goto err;
}
if (fclose(fp) != 0)
goto err;
return;
err:
btpd_err("failed to write metainfo '%s' (%s).\n", path, strerror(errno));
}
struct tlib *
tlib_add(const uint8_t *hash, const char *mi, size_t mi_size,
const char *content, char *name)
{
struct tlib *tl = tlib_create(hash);
#if 0
struct timeval tv;
#endif
char relpath[RELPATH_SIZE], file[PATH_MAX];
bin2hex(hash, relpath, 20);
if (name == NULL)
if ((name = mi_name(mi)) == NULL)
btpd_err("out of memory.\n");
tl->name = name;
tl->dir = strdup(content);
if (tl->name == NULL || tl->dir == NULL)
btpd_err("out of memory.\n");
#if 0
gettimeofday(&tv, NULL);
tl->t_added = tv.tv_sec;
#endif
snprintf(file, PATH_MAX, "torrents/%s", relpath);
if (mkdir(file, 0777) != 0)
btpd_err("failed to create dir '%s' (%s).\n", file, strerror(errno));
snprintf(file, PATH_MAX, "torrents/%s/torrent", relpath);
write_torrent(mi, mi_size, file);
snprintf(file, PATH_MAX, "torrents/%s/info", relpath);
save_info(tl, file);
return tl;
}
static int
num_test(const void *k1, const void *k2)
{
return *(const unsigned *)k1 == *(const unsigned *)k2;
}
static uint32_t
num_hash(const void *k)
{
return *(const unsigned *)k;
}
static int
id_test(const void *k1, const void *k2)
{
return bcmp(k1, k2, 20) == 0;
}
static uint32_t
id_hash(const void *k)
{
return net_read32(k + 16);
}
void
tlib_put_all(struct tlib **v)
{
hashtbl_tov(m_hashtbl, v);
}
void
tlib_init(void)
{
DIR *dirp;
struct dirent *dp;
uint8_t hash[20];
char file[PATH_MAX];
m_numtbl = numtbl_create(num_test, num_hash);
m_hashtbl = hashtbl_create(id_test, id_hash);
if (m_numtbl == NULL || m_hashtbl == NULL)
btpd_err("Out of memory.\n");
if ((dirp = opendir("torrents")) == NULL)
btpd_err("couldn't open the torrents directory.\n");
while ((dp = readdir(dirp)) != NULL) {
if (dp->d_namlen == 40 && ishex(dp->d_name)) {
struct tlib * tl = tlib_create(hex2bin(dp->d_name, hash, 20));
snprintf(file, PATH_MAX, "torrents/%s/info", dp->d_name);
load_info(tl, file);
}
}
closedir(dirp);
}
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