int main(int argc, char *argv[])
{
const char *masks[] = { "255.255.255.255", "255.255.255.0",
"255.255.0.0", "255.0.0.0" };
struct in_addr addr;
int i, len;
for (i = 0; i < 4; i++) {
printf("subnet %-16s prefixlen %u\n", masks[i],
netmask2prefixlen(masks[i]));
}
printf("\n");
for (i = 0; i < 4; i++) {
len = (i + 1) * 8;
addr.s_addr = htonl(~(0xfffffffflu >> len));
printf("prefixlen %-2u netmask %s\n", len, inet_ntoa(addr));
}
return 0;
}
/** Reload the account list */
static int
npppd_auth_reload_acctlist(npppd_auth_base *base)
{
CSVREADER_STATUS status;
int linno, ncols, usersz, nuser, eof, off;
const char **cols, *passwd, *callnum;
char line[8192];
csvreader *csv;
npppd_auth_user *user;
struct in_addr ip4, ip4mask;
slist users;
FILE *file;
struct stat st;
if (base->acctlist_ready != 0 && lstat(base->acctlist_path, &st) == 0) {
if (st.st_mtime == base->last_load)
return 0;
base->last_load = st.st_mtime;
}
slist_init(&users);
csv = NULL;
if ((file = priv_fopen(base->acctlist_path)) == NULL) {
/* hash is empty if file is not found. */
if (errno == ENOENT)
hash_delete_all(base->users_hash, 1);
npppd_auth_base_log(base,
(errno == ENOENT)? LOG_DEBUG : LOG_ERR,
"Open %s failed: %m", base->acctlist_path);
return 0;
}
if ((csv = csvreader_create()) == NULL) {
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list failed: csvreader_create(): %m");
goto fail;
}
for (linno = 0, eof = 0; !eof;) {
ip4.s_addr = 0;
ip4mask.s_addr = 0xffffffffL;
if (fgets(line, sizeof(line), file) != NULL) {
int linelen;
linelen = strlen(line);
if (linelen <= 0) {
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list failed: lineno=%d "
"line too short", linno + 1);
goto fail;
}
if (line[linelen - 1] != '\n' && !feof(file)) {
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list failed: lineno=%d "
"line too long", linno + 1);
goto fail;
}
status = csvreader_parse(csv, line);
} else {
if (!feof(file)) {
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list failed: %m");
goto fail;
}
status = csvreader_parse_flush(csv);
eof = 1;
}
if (status != CSVREADER_NO_ERROR) {
if (status == CSVREADER_OUT_OF_MEMORY)
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list failed: %m");
else
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list "
"failed: lineno=%d parse error", linno);
goto fail;
}
ncols = csvreader_get_number_of_column(csv);
if ((cols = csvreader_get_column(csv)) == NULL)
continue;
linno++; /* count up here because line number is treated as CSV. */
if (linno == 1) {
/* skip a title line */
continue;
}
if (ncols < 1) {
npppd_auth_base_log(base, LOG_ERR,
"account list lineno=%d has only %d fields.",
linno, ncols);
continue;
}
if (strlen(cols[0]) <= 0)
continue; /* skip if the user-name is empty */
if (ncols >= 3) {
if (*cols[2] != '\0' && inet_aton(cols[2], &ip4) != 1) {
npppd_auth_base_log(base, LOG_ERR,
"account list lineno=%d parse error: "
"invalid 'Framed-IP-Address' field: %s",
linno, cols[2]);
continue;
}
}
if (ncols >= 4) {
if ((*cols[3] != '\0' &&
inet_aton(cols[3], &ip4mask) != 1) ||
netmask2prefixlen(htonl(ip4mask.s_addr)) < 0) {
npppd_auth_base_log(base, LOG_ERR,
"account list lineno=%d parse error: "
"invalid 'Framed-IP-Netmask' field: %s",
linno, cols[3]);
continue;
}
}
passwd = "";
if (cols[1] != NULL)
passwd = cols[1];
callnum = "";
if (ncols >= 6 && cols[5] != NULL)
callnum = cols[5];
usersz = sizeof(npppd_auth_user);
usersz += strlen(cols[0]) + 1;
usersz += strlen(passwd) + 1;
usersz += strlen(callnum) + 1;
if ((user = malloc(usersz)) == NULL) {
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list failed: %m");
goto fail;
}
memset(user, 0, usersz);
off = 0;
user->username = user->space + off;
off += strlcpy(user->username, cols[0], usersz - off);
++off;
user->password = user->space + off;
off += strlcpy(user->password, passwd, usersz - off);
++off;
user->calling_number = user->space + off;
strlcpy(user->calling_number, callnum, usersz - off);
user->framed_ip_address = ip4;
user->framed_ip_netmask = ip4mask;
slist_add(&users, user);
}
hash_delete_all(base->users_hash, 1);
nuser = 0;
for (slist_itr_first(&users); slist_itr_has_next(&users);) {
user = slist_itr_next(&users);
if (hash_lookup(base->users_hash, user->username) != NULL) {
npppd_auth_base_log(base, LOG_WARNING,
"Record for user='******' is redefined, the first "
"record will be used.", user->username);
free(user);
goto next_user;
}
if (hash_insert(base->users_hash, user->username, user) != 0) {
npppd_auth_base_log(base, LOG_ERR,
"Loading a account list failed: hash_insert(): %m");
goto fail;
}
nuser++;
next_user:
slist_itr_remove(&users);
}
slist_fini(&users);
csvreader_destroy(csv);
fclose(file);
npppd_auth_base_log(base, LOG_INFO,
"Loaded users from='%s' successfully. %d users",
base->acctlist_path, nuser);
base->acctlist_ready = 1;
return 0;
fail:
fclose(file);
if (csv != NULL)
csvreader_destroy(csv);
hash_delete_all(base->users_hash, 1);
for (slist_itr_first(&users); slist_itr_has_next(&users);) {
user = slist_itr_next(&users);
free(user);
}
slist_fini(&users);
return 1;
}