int privsep_privpart_bindresport(const int psfd,
const PrivSepQuery * const query)
{
static const in_port_t portlist[] = FTP_ACTIVE_SOURCE_PORTS;
const in_port_t *portlistpnt = portlist;
int fd;
int on = 1;
int ret;
if ((fd = socket(query->bindresport.protocol,
SOCK_STREAM, IPPROTO_TCP)) == -1) {
goto bye;
}
# ifdef SO_REUSEPORT
(void) setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (char *) &on, sizeof on);
# else
(void) setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof on);
# endif
privsep_priv_user();
for (;;) {
if (query->bindresport.protocol == PF_INET6) {
STORAGE_PORT6(query->bindresport.ss) = htons(*portlistpnt);
} else {
STORAGE_PORT(query->bindresport.ss) = htons(*portlistpnt);
}
if (bind(fd, (struct sockaddr *) &query->bindresport.ss,
STORAGE_LEN(query->bindresport.ss)) == 0) {
break;
}
# ifdef USE_ONLY_FIXED_DATA_PORT
(void) sleep(1U);
# else
if (*portlistpnt == (in_port_t) 0U) {
break;
}
portlistpnt++;
# endif
}
privsep_unpriv_user();
bye:
ret = privsep_sendfd(psfd, fd);
ret |= close(fd);
return ret;
}
int filter_overwrite_sa_with_reply_map(const msgpack_object_map * const map,
const char * const key_host,
const char * const key_port,
struct sockaddr_storage * const sa,
socklen_t * const sa_len)
{
if (sa == NULL) {
return 0;
}
const msgpack_object * const obj_host =
msgpack_get_map_value_for_key(map, key_host);
if (obj_host != NULL &&
obj_host->type == MSGPACK_OBJECT_RAW &&
obj_host->via.raw.size > 0 &&
obj_host->via.raw.size < NI_MAXHOST) {
struct addrinfo *ai, hints;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = NI_NUMERICHOST | AI_ADDRCONFIG;
char new_host[NI_MAXHOST];
memcpy(new_host, obj_host->via.raw.ptr,
obj_host->via.raw.size);
new_host[obj_host->via.raw.size] = 0;
const int gai_err = getaddrinfo(new_host, NULL, &hints, &ai);
if (gai_err == 0) {
assert(ai->ai_addrlen <= sizeof *sa);
if (ai->ai_family == AF_INET &&
*sa_len >= (socklen_t) sizeof(STORAGE_SIN_ADDR(*sa))) {
assert((size_t) ai->ai_addrlen >=
sizeof(STORAGE_SIN_ADDR(*sa)));
memcpy(&STORAGE_SIN_ADDR(*sa),
&STORAGE_SIN_ADDR(* (struct sockaddr_storage *)
(void *) ai->ai_addr),
sizeof(STORAGE_SIN_ADDR(*sa)));
*sa_len = ai->ai_addrlen;
STORAGE_FAMILY(*sa) = ai->ai_family;
SET_STORAGE_LEN(*sa, ai->ai_addrlen);
} else if (ai->ai_family == AF_INET6 &&
*sa_len >= (socklen_t) sizeof(STORAGE_SIN_ADDR6(*sa))) {
assert((size_t) ai->ai_addrlen >=
sizeof(STORAGE_SIN_ADDR6(*sa)));
memcpy(&STORAGE_SIN_ADDR6(*sa),
&STORAGE_SIN_ADDR6(* (struct sockaddr_storage *)
(void *) ai->ai_addr),
sizeof(STORAGE_SIN_ADDR6(*sa)));
*sa_len = ai->ai_addrlen;
STORAGE_FAMILY(*sa) = ai->ai_family;
SET_STORAGE_LEN(*sa, ai->ai_addrlen);
}
freeaddrinfo(ai);
}
}
const msgpack_object * const obj_port =
msgpack_get_map_value_for_key(map, key_port);
if (obj_port != NULL &&
obj_port->type == MSGPACK_OBJECT_POSITIVE_INTEGER) {
if (obj_port->via.i64 >= 0 &&
obj_port->via.i64 <= 65535) {
if (STORAGE_FAMILY(*sa) == AF_INET) {
STORAGE_PORT(*sa) = htons((in_port_t) obj_port->via.i64);
} else if (STORAGE_FAMILY(*sa) == AF_INET6) {
STORAGE_PORT6(*sa) = htons((in_port_t) obj_port->via.i64);
}
}
}
return 0;
}