Ejemplo n.º 1
0
struct servent *
getservent_r(struct servent *sp, struct servent_data *sd)
{

	if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0 &&
	    _servent_open(sd) == -1)
		return NULL;

	if (sd->flags & _SV_CDB) {
		const void *data;
		size_t len;

		if (sd->flags & _SV_FIRST) {
			sd->cdb_index = 0;
			sd->flags &= ~_SV_FIRST;
		}

		if (cdbr_get(sd->cdb, sd->cdb_index, &data, &len))
			return NULL;
		++sd->cdb_index;
		return _servent_parsedb(sd, sp, data, len);
	}
	if (sd->flags & _SV_PLAINFILE) {
		for (;;) {
			if (_servent_getline(sd) == -1)
				return NULL;
			if (_servent_parseline(sd, sp) == NULL)
				continue;
			return sp;
		}
	}
	return NULL;
}
Ejemplo n.º 2
0
static struct servent *
_servent_getbyport(struct servent_data *sd, struct servent *sp, int port,
    const char *proto)
{

	if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0)
		return NULL;

	if (sd->flags & _SV_CDB) {
		uint8_t buf[255 + 4];
		size_t protolen;
		const uint8_t *data;
		const void *data_ptr;
		size_t datalen;

		port = be16toh(port);

		if (proto != NULL && *proto == '\0')
			return NULL;
		if (proto != NULL)
			protolen = strlen(proto);
		else
			protolen = 0;
		if (port < 0 || port > 65536)
			return NULL;

		buf[0] = 0;
		buf[1] = protolen;
		be16enc(buf + 2, port);
		memcpy(buf + 4, proto, protolen);

		if (cdbr_find(sd->cdb, buf, 4 + protolen,
		    &data_ptr, &datalen))
			return NULL;

		if (datalen < protolen + 4)
			return NULL;

		data = data_ptr;
		if (be16dec(data) != port)
			return NULL;
		if (protolen) {
			if (data[2] != protolen)
				return NULL;
			if (memcmp(data + 3, proto, protolen + 1))
				return NULL;
		}
		return _servent_parsedb(sd, sp, data, datalen);
	} else {
		while (_servent_getline(sd) != -1) {
			if (_servent_parseline(sd, sp) == NULL)
				continue;
			if (sp->s_port != port)
				continue;
			if (proto == NULL || strcmp(sp->s_proto, proto) == 0)
				return sp;
		}
		return NULL;
	}
}
Ejemplo n.º 3
0
static struct servent *
_servent_getbyname(struct servent_data *sd, struct servent *sp,
    const char *name, const char *proto)
{

	if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0)
		return NULL;

#if 0
	if (sd->flags & _SV_CDB) {
		uint8_t buf[255 * 2 + 2];
		size_t namelen, protolen;
		const uint8_t *data, *data_end;
		const void *data_ptr;
		size_t datalen;

		namelen = strlen(name);
		if (namelen == 0 || namelen > 255)
			return NULL;
		if (proto != NULL) {
			protolen = strlen(proto);
			if (protolen == 0 || protolen > 255)
				return NULL;
		} else
			protolen = 0;
		if (namelen + protolen > 255)
			return NULL;

		buf[0] = (uint8_t)namelen;
		buf[1] = (uint8_t)protolen;
		memcpy(buf + 2, name, namelen);
		memcpy(buf + 2 + namelen, proto, protolen);

		if (cdbr_find(sd->cdb, buf, 2 + namelen + protolen,
		    &data_ptr, &datalen))
			return NULL;

		if (datalen < namelen + protolen + 6)
			return NULL;

		data = data_ptr;
		data_end = data + datalen;
		if (protolen) {
			if (data[2] != protolen)
				return NULL;
			if (memcmp(data + 3, proto, protolen + 1))
				return NULL;
		}
		data += 3 + data[2] + 1;
		if (data > data_end)
			return NULL;
		while (data != data_end) {
			if (*data == '\0')
				return NULL;
			if (data + data[0] + 2 > data_end)
				return NULL;
			if (data[0] == namelen &&
			    memcmp(data + 1, name, namelen + 1) == 0)
				return _servent_parsedb(sd, sp, data_ptr,
				    datalen);
			data += data[0] + 2;
		}
		return NULL;
	} else
#endif
	{
		while (_servent_getline(sd) != -1) {
			char **cp;
			if (_servent_parseline(sd, sp) == NULL)
				continue;

			if (strcmp(name, sp->s_name) == 0)
				goto gotname;

			for (cp = sp->s_aliases; *cp; cp++)
				if (strcmp(name, *cp) == 0)
					goto gotname;
			continue;
gotname:
			if (proto == NULL || strcmp(sp->s_proto, proto) == 0)
				return sp;
		}
		return NULL;
	}
}