gboolean
ndmp_connection_mover_listen(
NDMPConnection *self,
ndmp9_mover_mode mode,
ndmp9_addr_type addr_type,
DirectTCPAddr **addrs)
{
unsigned int naddrs, i;
*addrs = NULL;
g_assert(!self->startup_err);
NDMP_TRANS(self, ndmp4_mover_listen)
request->mode = mode;
request->addr_type = addr_type;
NDMP_CALL(self);
if (request->addr_type != reply->connect_addr.addr_type) {
g_warning("MOVER_LISTEN addr_type mismatch; got %d", reply->connect_addr.addr_type);
}
if (reply->connect_addr.addr_type == NDMP4_ADDR_TCP) {
naddrs = reply->connect_addr.ndmp4_addr_u.tcp_addr.tcp_addr_len;
*addrs = g_new0(DirectTCPAddr, naddrs+1);
for (i = 0; i < naddrs; i++) {
ndmp4_tcp_addr *na = &reply->connect_addr.ndmp4_addr_u.tcp_addr.tcp_addr_val[i];
(*addrs)[i].sin.sin_family = AF_INET;
(*addrs)[i].sin.sin_addr.s_addr = htonl(na->ip_addr);
SU_SET_PORT(&((*addrs)[i]), na->port);
}
}
NDMP_FREE();
NDMP_END
return TRUE;
}
static sockaddr_union *
unmap_v4mapped(
sockaddr_union *sa,
sockaddr_union *tmp)
{
if (SU_GET_FAMILY(sa) == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->sin6.sin6_addr)) {
SU_INIT(tmp, AF_INET);
SU_SET_PORT(tmp, SU_GET_PORT(sa));
/* extract the v4 address from byte 12 of the v6 address */
memcpy(&tmp->sin.sin_addr.s_addr,
&sa->sin6.sin6_addr.s6_addr[12],
sizeof(struct in_addr));
return tmp;
}
return sa;
}
static int
do_directtcp_connect(
XferElementGlue *self,
DirectTCPAddr *addrs)
{
XferElement *elt = XFER_ELEMENT(self);
sockaddr_union addr;
int sock;
#ifdef WORKING_IPV6
char strsockaddr[INET6_ADDRSTRLEN + 20];
#else
char strsockaddr[INET_ADDRSTRLEN + 20];
#endif
if (!addrs) {
g_debug("element-glue got no directtcp addresses to connect to!");
if (!elt->cancelled) {
xfer_cancel_with_error(elt,
"%s got no directtcp addresses to connect to",
xfer_element_repr(elt));
}
goto cancel_wait;
}
/* set up the sockaddr -- IPv4 only */
copy_sockaddr(&addr, addrs);
str_sockaddr_r(&addr, strsockaddr, sizeof(strsockaddr));
if (strncmp(strsockaddr,"255.255.255.255:", 16) == 0) {
char buffer[32770];
char *s;
int size;
char *data_host;
int data_port;
g_debug("do_directtcp_connect making indirect data connection to %s",
strsockaddr);
data_port = SU_GET_PORT(&addr);
sock = stream_client(NULL, "localhost", data_port,
STREAM_BUFSIZE, 0, NULL, 0);
if (sock < 0) {
xfer_cancel_with_error(elt, "stream_client(): %s", strerror(errno));
goto cancel_wait;
}
size = full_read(sock, buffer, 32768);
if (size < 0 ) {
xfer_cancel_with_error(elt, "failed to read from indirecttcp: %s",
strerror(errno));
goto cancel_wait;
}
close(sock);
buffer[size++] = ' ';
buffer[size] = '\0';
if ((s = strchr(buffer, ':')) == NULL) {
xfer_cancel_with_error(elt,
"Failed to parse indirect data stream: %s",
buffer);
goto cancel_wait;
}
*s++ = '\0';
data_host = buffer;
data_port = atoi(s);
str_to_sockaddr(data_host, &addr);
SU_SET_PORT(&addr, data_port);
str_sockaddr_r(&addr, strsockaddr, sizeof(strsockaddr));
}
sock = socket(SU_GET_FAMILY(&addr), SOCK_STREAM, 0);
g_debug("do_directtcp_connect making data connection to %s", strsockaddr);
if (sock < 0) {
xfer_cancel_with_error(elt,
"socket(): %s", strerror(errno));
goto cancel_wait;
}
if (connect(sock, (struct sockaddr *)&addr, SS_LEN(&addr)) < 0) {
xfer_cancel_with_error(elt,
"connect(): %s", strerror(errno));
close(sock);
goto cancel_wait;
}
g_debug("do_directtcp_connect: connected to %s, fd %d", strsockaddr, sock);
return sock;
cancel_wait:
wait_until_xfer_cancelled(elt->xfer);
return -1;
}
static int
stream_client_internal(
const char *hostname,
in_port_t port,
size_t sendsize,
size_t recvsize,
in_port_t *localport,
int nonblock,
int priv)
{
sockaddr_union svaddr, claddr;
int save_errno = 0;
int client_socket = 0;
int *portrange = NULL;
int result;
struct addrinfo *res, *res_addr;
result = resolve_hostname(hostname, SOCK_STREAM, &res, NULL);
if(result != 0) {
g_debug(_("resolve_hostname(%s): %s"), hostname, gai_strerror(result));
errno = EHOSTUNREACH;
return -1;
}
if(!res) {
g_debug(_("resolve_hostname(%s): no results"), hostname);
errno = EHOSTUNREACH;
return -1;
}
for (res_addr = res; res_addr != NULL; res_addr = res_addr->ai_next) {
/* copy the first (preferred) address we found */
copy_sockaddr(&svaddr, (sockaddr_union *)res_addr->ai_addr);
SU_SET_PORT(&svaddr, port);
SU_INIT(&claddr, SU_GET_FAMILY(&svaddr));
SU_SET_INADDR_ANY(&claddr);
/*
* If a privileged port range was requested, we try to get a port in
* that range first and fail if it is not available. Next, we try
* to get a port in the range built in when Amanda was configured.
* If that fails, we just go for any port.
*
* It is up to the caller to make sure we have the proper permissions
* to get the desired port, and to make sure we return a port that
* is within the range it requires.
*/
if (priv) {
portrange = getconf_intrange(CNF_RESERVED_TCP_PORT);
} else {
portrange = getconf_intrange(CNF_UNRESERVED_TCP_PORT);
}
client_socket = connect_portrange(&claddr, (in_port_t)portrange[0],
(in_port_t)portrange[1],
"tcp", &svaddr, nonblock);
save_errno = errno;
if (client_socket > 0)
break;
}
freeaddrinfo(res);
if (client_socket > 0)
goto out;
g_debug(_("stream_client: Could not bind to port in range %d-%d."),
portrange[0], portrange[1]);
errno = save_errno;
return -1;
out:
try_socksize(client_socket, SO_SNDBUF, sendsize);
try_socksize(client_socket, SO_RCVBUF, recvsize);
if (localport != NULL)
*localport = SU_GET_PORT(&claddr);
return client_socket;
}
/*
* Bind to a port in the given range. Takes a begin,end pair of port numbers.
*
* Returns negative on error (EGAIN if all ports are in use). Returns 0
* on success.
*/
int
bind_portrange(
int s,
sockaddr_union *addrp,
in_port_t first_port,
in_port_t last_port,
char * proto)
{
in_port_t port;
in_port_t cnt;
socklen_t_equiv socklen;
struct servent *servPort;
const in_port_t num_ports = (in_port_t)(last_port - first_port + 1);
int save_errno = EAGAIN;
assert(first_port <= last_port);
/*
* We pick a different starting port based on our pid and the current
* time to avoid always picking the same reserved port twice.
*/
port = (in_port_t)(((getpid() + time(0)) % num_ports) + first_port);
/*
* Scan through the range, trying all available ports that are either
* not taken in /etc/services or registered for *amanda*. Wrap around
* if we don't happen to start at the beginning.
*/
for (cnt = 0; cnt < num_ports; cnt++) {
servPort = getservbyport((int)htons(port), proto);
if ((servPort == NULL) || strstr(servPort->s_name, AMANDA_SERVICE_NAME)) {
SU_SET_PORT(addrp, port);
socklen = SS_LEN(addrp);
if (bind(s, (struct sockaddr *)addrp, socklen) >= 0) {
if (servPort == NULL) {
g_debug(_("bind_portrange2: Try port %d: Available - Success"), port);
} else {
g_debug(_("bind_portrange2: Try port %d: Owned by %s - Success."), port, servPort->s_name);
}
return 0;
}
if (errno != EAGAIN && errno != EBUSY)
save_errno = errno;
if (servPort == NULL) {
g_debug(_("bind_portrange2: Try port %d: Available - %s"),
port, strerror(errno));
} else {
g_debug(_("bind_portrange2: Try port %d: Owned by %s - %s"),
port, servPort->s_name, strerror(errno));
}
} else {
g_debug(_("bind_portrange2: Skip port %d: Owned by %s."),
port, servPort->s_name);
}
if (++port > last_port)
port = first_port;
}
g_debug(_("bind_portrange: all ports between %d and %d busy"),
first_port,
last_port);
errno = save_errno;
return -1;
}
/* return >0: this is the connected socket */
int
connect_port(
sockaddr_union *addrp,
in_port_t port,
char * proto,
sockaddr_union *svaddr,
int nonblock)
{
int save_errno;
struct servent * servPort;
socklen_t_equiv len;
socklen_t_equiv socklen;
int s;
servPort = getservbyport((int)htons(port), proto);
if (servPort != NULL && !strstr(servPort->s_name, AMANDA_SERVICE_NAME)) {
dbprintf(_("connect_port: Skip port %d: owned by %s.\n"),
port, servPort->s_name);
errno = EBUSY;
return -1;
}
if ((s = make_socket(SU_GET_FAMILY(addrp))) == -1) return -2;
SU_SET_PORT(addrp, port);
socklen = SS_LEN(addrp);
if (bind(s, (struct sockaddr *)addrp, socklen) != 0) {
save_errno = errno;
aclose(s);
if(servPort == NULL) {
dbprintf(_("connect_port: Try port %d: available - %s\n"),
port, strerror(errno));
} else {
dbprintf(_("connect_port: Try port %d: owned by %s - %s\n"),
port, servPort->s_name, strerror(errno));
}
if (save_errno != EADDRINUSE) {
errno = save_errno;
return -2;
}
errno = save_errno;
return -1;
}
if(servPort == NULL) {
dbprintf(_("connect_port: Try port %d: available - Success\n"), port);
} else {
dbprintf(_("connect_port: Try port %d: owned by %s - Success\n"),
port, servPort->s_name);
}
/* find out what port was actually used */
len = sizeof(*addrp);
if (getsockname(s, (struct sockaddr *)addrp, &len) == -1) {
save_errno = errno;
dbprintf(_("connect_port: getsockname() failed: %s\n"),
strerror(save_errno));
aclose(s);
errno = save_errno;
return -1;
}
if (nonblock) {
int r = fcntl(s, F_GETFL, 0);
if (r < 0) {
save_errno = errno;
g_debug("Can't fcntl(F_GETFL): %s", strerror(errno));
aclose(s);
errno = save_errno;
return -1;
}
r = fcntl(s, F_SETFL, r|O_NONBLOCK);
if (r < 0) {
save_errno = errno;
g_debug("Can't fcntl(F_SETFL,O_NONBLOCK): %s", strerror(errno));
errno = save_errno;
aclose(s);
return -1;
}
}
if (connect(s, (struct sockaddr *)svaddr, SS_LEN(svaddr)) == -1 && !nonblock) {
save_errno = errno;
dbprintf(_("connect_portrange: Connect from %s failed: %s\n"),
str_sockaddr(addrp),
strerror(save_errno));
dbprintf(_("connect_portrange: connect to %s failed: %s\n"),
str_sockaddr(svaddr),
strerror(save_errno));
aclose(s);
errno = save_errno;
if (save_errno == ECONNREFUSED ||
save_errno == EHOSTUNREACH ||
save_errno == ENETUNREACH ||
save_errno == ETIMEDOUT) {
return -2 ;
}
return -1;
}
dbprintf(_("connected to %s\n"),
str_sockaddr(svaddr));
dbprintf(_("our side is %s\n"),
str_sockaddr(addrp));
return s;
}
