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;
}
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;
}
}
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;
}
}