/**
* Mapping from local network to loopback for outbound connections.
*
* Copy "src" to "dst" with ip6_addr_set(dst, src), but if "src" is a
* local network address that maps host's loopback address, copy IPv6
* loopback address to "dst".
*/
int
pxremap_outbound_ip6(ip6_addr_t *dst, ip6_addr_t *src)
{
struct netif *netif;
int i;
LWIP_ASSERT1(dst != NULL);
LWIP_ASSERT1(src != NULL);
for (netif = netif_list; netif != NULL; netif = netif->next) {
if (!netif_is_up(netif) /* || this is not a proxy netif */) {
continue;
}
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; ++i) {
if (ip6_addr_ispreferred(netif_ip6_addr_state(netif, i))
&& ip6_addr_isuniquelocal(netif_ip6_addr(netif, i)))
{
ip6_addr_t *ifaddr = netif_ip6_addr(netif, i);
if (memcmp(src, ifaddr, sizeof(ip6_addr_t) - 1) == 0
&& ((IP6_ADDR_BLOCK8(src) & 0xff)
== (IP6_ADDR_BLOCK8(ifaddr) & 0xff) + 1))
{
ip6_addr_set_loopback(dst);
return PXREMAP_MAPPED;
}
}
}
}
/* not remapped, just copy src */
ip6_addr_set(dst, src);
return PXREMAP_ASIS;
}
void
pollmgr_update_events(int slot, int events)
{
LWIP_ASSERT1(slot >= POLLMGR_SLOT_FIRST_DYNAMIC);
LWIP_ASSERT1((nfds_t)slot < pollmgr.nfds);
pollmgr.fds[slot].events = events;
}
/**
* New proxied UDP conversation created.
* Global callback for udp_proxy_accept().
*/
static void
pxudp_pcb_accept(void *arg, struct udp_pcb *newpcb, struct pbuf *p,
ip_addr_t *addr, u16_t port)
{
struct pxudp *pxudp;
ipX_addr_t dst_addr;
int mapping;
int sdom;
SOCKET sock;
LWIP_ASSERT1(newpcb != NULL);
LWIP_ASSERT1(p != NULL);
LWIP_UNUSED_ARG(arg);
pxudp = pxudp_allocate();
if (pxudp == NULL) {
DPRINTF(("pxudp_allocate: failed\n"));
udp_remove(newpcb);
pbuf_free(p);
return;
}
sdom = PCB_ISIPV6(newpcb) ? PF_INET6 : PF_INET;
mapping = pxremap_outbound_ipX(PCB_ISIPV6(newpcb), &dst_addr, &newpcb->local_ip);
#if 0 /* XXX: DNS IPv6->IPv4 remapping hack */
if (mapping == PXREMAP_MAPPED
&& newpcb->local_port == 53
&& PCB_ISIPV6(newpcb))
{
/*
* "Remap" DNS over IPv6 to IPv4 since Ubuntu dnsmasq does not
* listen on IPv6.
*/
sdom = PF_INET;
ipX_addr_set_loopback(0, &dst_addr);
}
#endif /* DNS IPv6->IPv4 remapping hack */
sock = proxy_connected_socket(sdom, SOCK_DGRAM,
&dst_addr, newpcb->local_port);
if (sock == INVALID_SOCKET) {
udp_remove(newpcb);
pbuf_free(p);
return;
}
pxudp->sock = sock;
pxudp->pcb = newpcb;
udp_recv(newpcb, pxudp_pcb_recv, pxudp);
pxudp->pmhdl.callback = pxudp_pmgr_pump;
pxudp_chan_send(POLLMGR_CHAN_PXUDP_ADD, pxudp);
/* dispatch directly instead of calling pxudp_pcb_recv() */
pxudp_pcb_forward_outbound(pxudp, p, addr, port);
}
/**
* Try to get the pointer from implicitely weak reference we've got
* from a channel.
*
* If we detect that the object is still strongly referenced, but no
* longer registered with the poll manager we abort strengthening
* conversion here b/c lwip thread callback is already scheduled to
* destruct the object.
*/
struct pollmgr_handler *
pollmgr_refptr_get(struct pollmgr_refptr *rp)
{
struct pollmgr_handler *handler;
size_t weak;
sys_mutex_lock(&rp->lock);
LWIP_ASSERT1(rp->weak > 0);
weak = --rp->weak;
handler = rp->ptr;
if (handler == NULL) {
LWIP_ASSERT1(rp->strong == 0);
sys_mutex_unlock(&rp->lock);
if (weak == 0) {
pollmgr_refptr_delete(rp);
}
return NULL;
}
LWIP_ASSERT1(rp->strong == 1);
/*
* Here we woild do:
*
* ++rp->strong;
*
* and then, after channel handler is done, we would decrement it
* back.
*
* Instead we check that the object is still registered with poll
* manager. If it is, there's no race with lwip thread trying to
* drop its strong reference, as lwip thread callback to destruct
* the object is always scheduled by its poll manager callback.
*
* Conversly, if we detect that the object is no longer registered
* with poll manager, we immediately abort. Since channel handler
* can't do anything useful anyway and would have to return
* immediately.
*
* Since channel handler would always find rp->strong as it had
* left it, just elide extra strong reference creation to avoid
* the whole back-and-forth.
*/
if (handler->slot < 0) { /* no longer polling */
sys_mutex_unlock(&rp->lock);
return NULL;
}
sys_mutex_unlock(&rp->lock);
return handler;
}
static void
pxdns_request_free(struct request *req)
{
LWIP_ASSERT1(req->pprev_hash == NULL);
LWIP_ASSERT1(req->pprev_timeout == NULL);
if (req->reply != NULL) {
pbuf_free(req->reply);
}
free(req);
}
/**
* Add weak reference before "rp" is sent over a poll manager channel.
*/
void
pollmgr_refptr_weak_ref(struct pollmgr_refptr *rp)
{
sys_mutex_lock(&rp->lock);
LWIP_ASSERT1(rp->ptr != NULL);
LWIP_ASSERT1(rp->strong > 0);
++rp->weak;
sys_mutex_unlock(&rp->lock);
}
static void
pollmgr_refptr_delete(struct pollmgr_refptr *rp)
{
if (rp == NULL) {
return;
}
LWIP_ASSERT1(rp->strong == 0);
LWIP_ASSERT1(rp->weak == 0);
sys_mutex_free(&rp->lock);
free(rp);
}
/**
* Remove (the only) strong reference.
*
* If it were real strong/weak pointers, we should also call
* destructor for the referenced object, but
*/
void
pollmgr_refptr_unref(struct pollmgr_refptr *rp)
{
sys_mutex_lock(&rp->lock);
LWIP_ASSERT1(rp->strong == 1);
--rp->strong;
if (rp->strong > 0) {
sys_mutex_unlock(&rp->lock);
}
else {
size_t weak;
/* void *ptr = rp->ptr; */
rp->ptr = NULL;
/* delete ptr; // see doc comment */
weak = rp->weak;
sys_mutex_unlock(&rp->lock);
if (weak == 0) {
pollmgr_refptr_delete(rp);
}
}
}
/**
* Receive a pointer sent over poll manager channel.
*/
void *
pollmgr_chan_recv_ptr(struct pollmgr_handler *handler, SOCKET fd, int revents)
{
void *ptr;
ssize_t nread;
if (revents & POLLNVAL) {
errx(EXIT_FAILURE, "chan %d: fd invalid", (int)handler->slot);
/* NOTREACHED */
}
if (revents & (POLLERR | POLLHUP)) {
errx(EXIT_FAILURE, "chan %d: fd error", (int)handler->slot);
/* NOTREACHED */
}
LWIP_ASSERT1(revents & POLLIN);
nread = recv(fd, (char *)&ptr, sizeof(ptr), 0);
if (nread == SOCKET_ERROR) {
err(EXIT_FAILURE, "chan %d: recv", (int)handler->slot);
/* NOTREACHED */
}
if (nread != sizeof(ptr)) {
errx(EXIT_FAILURE, "chan %d: recv: read %d bytes",
(int)handler->slot, (int)nread);
/* NOTREACHED */
}
return ptr;
}
/**
* Check if "dst" is an IPv4 address that proxy remaps to host's
* loopback.
*/
static int
proxy_ip4_is_mapped_loopback(struct netif *netif, const ip_addr_t *dst, ip_addr_t *lo)
{
u32_t off;
const struct ip4_lomap *lomap;
size_t i;
LWIP_ASSERT1(dst != NULL);
if (g_proxy_options->lomap_desc == NULL) {
return 0;
}
if (!ip_addr_netcmp(dst, &netif->ip_addr, &netif->netmask)) {
return 0;
}
/* XXX: TODO: check netif is a proxying netif! */
off = ntohl(ip4_addr_get_u32(dst) & ~ip4_addr_get_u32(&netif->netmask));
lomap = g_proxy_options->lomap_desc->lomap;
for (i = 0; i < g_proxy_options->lomap_desc->num_lomap; ++i) {
if (off == lomap[i].off) {
if (lo != NULL) {
ip_addr_copy(*lo, lomap[i].loaddr);
}
return 1;
}
}
return 0;
}
/**
* Lwip thread callback invoked via fwudp::msg_delete
*/
static void
fwudp_pcb_delete(void *arg)
{
struct fwudp *fwudp = (struct fwudp *)arg;
struct udp_pcb *pcb;
struct udp_pcb **pprev;
LWIP_ASSERT1(fwudp->inbuf.unsent == fwudp->inbuf.vacant);
pprev = &udp_proxy_pcbs;
pcb = udp_proxy_pcbs;
while (pcb != NULL) {
if (pcb->recv_arg != fwudp) {
pprev = &pcb->next;
pcb = pcb->next;
}
else {
struct udp_pcb *dead = pcb;
pcb = pcb->next;
*pprev = pcb;
memp_free(MEMP_UDP_PCB, dead);
}
}
closesocket(fwudp->sock);
free(fwudp->inbuf.buf);
free(fwudp);
}
static int
proxy_ip6_is_mapped_loopback(struct netif *netif, ip6_addr_t *dst)
{
int i;
/* XXX: TODO: check netif is a proxying netif! */
LWIP_ASSERT1(dst != NULL);
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; ++i) {
if (ip6_addr_ispreferred(netif_ip6_addr_state(netif, i))
&& ip6_addr_isuniquelocal(netif_ip6_addr(netif, i)))
{
ip6_addr_t *ifaddr = netif_ip6_addr(netif, i);
if (memcmp(dst, ifaddr, sizeof(ip6_addr_t) - 1) == 0
&& ((IP6_ADDR_BLOCK8(dst) & 0xff)
== (IP6_ADDR_BLOCK8(ifaddr) & 0xff) + 1))
{
return 1;
}
}
}
return 0;
}
/**
* udp_recv() callback.
*/
static void
pxudp_pcb_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p,
ip_addr_t *addr, u16_t port)
{
struct pxudp *pxudp = (struct pxudp *)arg;
LWIP_ASSERT1(pxudp != NULL);
LWIP_ASSERT1(pcb == pxudp->pcb);
LWIP_UNUSED_ARG(pcb);
if (p != NULL) {
pxudp_pcb_forward_outbound(pxudp, p, addr, port);
}
else {
pxudp_pcb_expired(pxudp);
}
}
/**
* Forward request to the req::residx resolver in the pxdns::resolvers
* array of upstream resolvers.
*
* Returns 1 on success, 0 on failure.
*/
static int
pxdns_forward_outbound(struct pxdns *pxdns, struct request *req)
{
union sockaddr_inet *resolver;
ssize_t nsent;
DPRINTF2(("%s: req %p: sending to resolver #%lu\n",
__func__, (void *)req, (unsigned long)req->residx));
LWIP_ASSERT1(req->generation == pxdns->generation);
LWIP_ASSERT1(req->residx < pxdns->nresolvers);
resolver = &pxdns->resolvers[req->residx];
if (resolver->sa.sa_family == AF_INET) {
nsent = sendto(pxdns->sock4, req->data, req->size, 0,
&resolver->sa, sizeof(resolver->sin));
}
else if (resolver->sa.sa_family == AF_INET6) {
if (pxdns->sock6 != INVALID_SOCKET) {
nsent = sendto(pxdns->sock6, req->data, req->size, 0,
&resolver->sa, sizeof(resolver->sin6));
}
else {
/* shouldn't happen, we should have weeded out IPv6 resolvers */
return 0;
}
}
else {
/* shouldn't happen, we should have weeded out unsupported families */
return 0;
}
if ((size_t)nsent == req->size) {
return 1; /* sent */
}
if (nsent < 0) {
DPRINTF2(("%s: send: %R[sockerr]\n", __func__, SOCKERRNO()));
}
else {
DPRINTF2(("%s: sent only %lu of %lu\n",
__func__, (unsigned long)nsent, (unsigned long)req->size));
}
return 0; /* not sent, caller will retry as necessary */
}
static void
pxdns_timeout_del(struct pxdns *pxdns, struct request *req)
{
LWIP_ASSERT1(req->pprev_timeout != NULL);
LWIP_ASSERT1(req->timeout_slot < TIMEOUT);
if (req->next_timeout != NULL) {
req->next_timeout->pprev_timeout = req->pprev_timeout;
}
*req->pprev_timeout = req->next_timeout;
req->pprev_timeout = NULL;
req->next_timeout = NULL;
if (pxdns->timeout_list[req->timeout_slot] == NULL) {
pxdns->timeout_mask &= ~(1U << req->timeout_slot);
/* may be on pollmgr thread so no sys_untimeout */
}
}
void
pollmgr_del_slot(int slot)
{
LWIP_ASSERT1(slot >= POLLMGR_SLOT_FIRST_DYNAMIC);
DPRINTF2(("%s(%d): fd %d ! DELETED\n",
__func__, slot, pollmgr.fds[slot].fd));
pollmgr.fds[slot].fd = INVALID_SOCKET; /* see poll loop */
}
/*
* Called on the lwip thread (aka tcpip thread) from tcpip_init() via
* its "tcpip_init_done" callback. Raw API is ok to use here
* (e.g. rtadvd), but netconn API is not.
*/
void
proxy_init(struct netif *proxy_netif, struct proxy_options *opts)
{
int status;
LWIP_ASSERT1(opts != NULL);
LWIP_UNUSED_ARG(proxy_netif);
status = RTStrFormatTypeRegister("sockerr", proxy_sockerr_rtstrfmt, NULL);
AssertRC(status);
g_proxy_options = opts;
g_proxy_netif = proxy_netif;
#if 1
proxy_rtadvd_start(proxy_netif);
#endif
/*
* XXX: We use stateless DHCPv6 only to report IPv6 address(es) of
* nameserver(s). Since we don't yet support IPv6 addresses in
* HostDnsService, there's no point in running DHCPv6.
*/
#if 0
dhcp6ds_init(proxy_netif);
#endif
if (opts->tftp_root != NULL) {
tftpd_init(proxy_netif, opts->tftp_root);
}
status = pollmgr_init();
if (status < 0) {
errx(EXIT_FAILURE, "failed to initialize poll manager");
/* NOTREACHED */
}
pxtcp_init();
pxudp_init();
portfwd_init();
pxdns_init(proxy_netif);
pxping_init(proxy_netif, opts->icmpsock4, opts->icmpsock6);
pollmgr_tid = sys_thread_new("pollmgr_thread",
pollmgr_thread, NULL,
DEFAULT_THREAD_STACKSIZE,
DEFAULT_THREAD_PRIO);
if (!pollmgr_tid) {
errx(EXIT_FAILURE, "failed to create poll manager thread");
/* NOTREACHED */
}
}
/**
* Mapping from loopback to local network for inbound (port-forwarded)
* connections.
*
* Copy "src" to "dst" with ip_addr_set(dst, src), but if "src" is a
* host's loopback address, copy local network address that maps it to
* "dst".
*/
int
pxremap_inbound_ip4(ip_addr_t *dst, ip_addr_t *src)
{
struct netif *netif;
const struct ip4_lomap *lomap;
unsigned int i;
if (ip4_addr1(src) != IP_LOOPBACKNET) {
ip_addr_set(dst, src);
return PXREMAP_ASIS;
}
if (g_proxy_options->lomap_desc == NULL) {
return PXREMAP_FAILED;
}
#if 0 /* ?TODO: with multiple interfaces we need to consider fwspec::dst */
netif = ip_route(target);
if (netif == NULL) {
return PXREMAP_FAILED;
}
#else
netif = netif_list;
LWIP_ASSERT1(netif != NULL);
LWIP_ASSERT1(netif->next == NULL);
#endif
lomap = g_proxy_options->lomap_desc->lomap;
for (i = 0; i < g_proxy_options->lomap_desc->num_lomap; ++i) {
if (ip_addr_cmp(src, &lomap[i].loaddr)) {
ip_addr_t net;
ip_addr_get_network(&net, &netif->ip_addr, &netif->netmask);
ip4_addr_set_u32(dst,
htonl(ntohl(ip4_addr_get_u32(&net))
+ lomap[i].off));
return PXREMAP_MAPPED;
}
}
return PXREMAP_FAILED;
}
/**
* Mapping from local network to loopback for outbound connections.
*
* Copy "src" to "dst" with ip_addr_set(dst, src), but if "src" is a
* local network address that maps host's loopback address, copy
* loopback address to "dst".
*/
int
pxremap_outbound_ip4(ip_addr_t *dst, ip_addr_t *src)
{
struct netif *netif;
LWIP_ASSERT1(dst != NULL);
LWIP_ASSERT1(src != NULL);
for (netif = netif_list; netif != NULL; netif = netif->next) {
if (netif_is_up(netif) /* && this is a proxy netif */) {
if (proxy_ip4_is_mapped_loopback(netif, src, dst)) {
return PXREMAP_MAPPED;
}
}
}
/* not remapped, just copy src */
ip_addr_set(dst, src);
return PXREMAP_ASIS;
}
/**
* Send static callback message from poll manager thread to lwip
* thread, scheduling a function call in lwip thread context.
*
* XXX: Existing lwip api only provides non-blocking version for this.
* It may fail when lwip thread is not running (mbox invalid) or if
* post failed (mbox full). How to handle these?
*/
void
proxy_lwip_post(struct tcpip_msg *msg)
{
struct tcpip_callback_msg *m;
err_t error;
LWIP_ASSERT1(msg != NULL);
/*
* lwip plays games with fake incomplete struct tag to enforce API
*/
m = (struct tcpip_callback_msg *)msg;
error = tcpip_callbackmsg(m);
if (error == ERR_VAL) {
/* XXX: lwip thread is not running (mbox invalid) */
LWIP_ASSERT1(error != ERR_VAL);
}
LWIP_ASSERT1(error == ERR_OK);
}
/**
* Callback from poll manager to trigger sending to guest.
*/
static void
pxudp_pcb_write_inbound(void *ctx)
{
struct pxudp *pxudp = (struct pxudp *)ctx;
LWIP_ASSERT1(pxudp != NULL);
if (pxudp->pcb == NULL) {
return;
}
pxudp_pcb_forward_inbound(pxudp);
}
static void
pxdns_hash_del(struct pxdns *pxdns, struct request *req)
{
LWIP_ASSERT1(req->pprev_hash != NULL);
--pxdns->active_queries;
if (req->next_hash != NULL) {
req->next_hash->pprev_hash = req->pprev_hash;
}
*req->pprev_hash = req->next_hash;
req->pprev_hash = NULL;
req->next_hash = NULL;
}
/**
* Retransmit of g/c expired requests and move timeout slot forward.
*/
static void
pxdns_timer(void *arg)
{
struct pxdns *pxdns = (struct pxdns *)arg;
struct request **chain, *req;
u32_t mask;
sys_mutex_lock(&pxdns->lock);
/*
* Move timeout slot first. New slot points to the list of
* expired requests. If any expired request is retransmitted, we
* keep it on the list (that is now current), effectively
* resetting the timeout.
*/
LWIP_ASSERT1(pxdns->timeout_slot < TIMEOUT);
if (++pxdns->timeout_slot == TIMEOUT) {
pxdns->timeout_slot = 0;
}
chain = &pxdns->timeout_list[pxdns->timeout_slot];
req = *chain;
while (req != NULL) {
struct request *expired = req;
req = req->next_timeout;
if (pxdns_rexmit(pxdns, expired)) {
continue;
}
pxdns_hash_del(pxdns, expired);
pxdns_timeout_del(pxdns, expired);
++pxdns->expired_queries;
pxdns_request_free(expired);
}
if (pxdns->timeout_list[pxdns->timeout_slot] == NULL) {
pxdns->timeout_mask &= ~(1U << pxdns->timeout_slot);
}
else {
pxdns->timeout_mask |= 1U << pxdns->timeout_slot;
}
mask = pxdns->timeout_mask;
sys_mutex_unlock(&pxdns->lock);
if (mask != 0) {
sys_timeout(1 * 1000, pxdns_timer, pxdns);
}
}
int
fwspec_equal(struct fwspec *a, struct fwspec *b)
{
LWIP_ASSERT1(a != NULL);
LWIP_ASSERT1(b != NULL);
if (a->sdom != b->sdom || a->stype != b->stype) {
return 0;
}
if (a->sdom == PF_INET) {
return a->src.sin.sin_port == b->src.sin.sin_port
&& a->dst.sin.sin_port == b->dst.sin.sin_port
&& a->src.sin.sin_addr.s_addr == b->src.sin.sin_addr.s_addr
&& a->dst.sin.sin_addr.s_addr == b->dst.sin.sin_addr.s_addr;
}
else { /* PF_INET6 */
return a->src.sin6.sin6_port == b->src.sin6.sin6_port
&& a->dst.sin6.sin6_port == b->dst.sin6.sin6_port
&& IN6_ARE_ADDR_EQUAL(&a->src.sin6.sin6_addr, &b->src.sin6.sin6_addr)
&& IN6_ARE_ADDR_EQUAL(&a->dst.sin6.sin6_addr, &b->dst.sin6.sin6_addr);
}
}
/**
* POLLMGR_CHAN_PXUDP_ADD handler.
*
* Get new pxudp from lwip thread and start polling its socket.
*/
static int
pxudp_pmgr_chan_add(struct pollmgr_handler *handler, SOCKET fd, int revents)
{
struct pxudp *pxudp;
int status;
pxudp = pxudp_chan_recv(handler, fd, revents);
DPRINTF(("pxudp_add: new pxudp %p; pcb %p\n",
(void *)pxudp, (void *)pxudp->pcb));
LWIP_ASSERT1(pxudp != NULL);
LWIP_ASSERT1(pxudp->pmhdl.callback != NULL);
LWIP_ASSERT1(pxudp->pmhdl.data = (void *)pxudp);
LWIP_ASSERT1(pxudp->pmhdl.slot < 0);
status = pollmgr_add(&pxudp->pmhdl, pxudp->sock, POLLIN);
if (status < 0) {
pxudp_schedule_delete(pxudp);
}
return POLLIN;
}
static void
pxdns_hash_add(struct pxdns *pxdns, struct request *req)
{
struct request **chain;
LWIP_ASSERT1(req->pprev_hash == NULL);
chain = &pxdns->request_hash[HASH(req->id)];
if ((req->next_hash = *chain) != NULL) {
(*chain)->pprev_hash = &req->next_hash;
++pxdns->hash_collisions;
}
*chain = req;
req->pprev_hash = chain;
}
static void
fwtcp_pcb_delete(void *arg)
{
struct fwtcp *fwtcp = (struct fwtcp *)arg;
void *data;
u32_t timo;
timo = sys_mbox_tryfetch(&fwtcp->connmbox, &data);
LWIP_ASSERT1(timo == SYS_MBOX_EMPTY);
LWIP_UNUSED_ARG(timo); /* only in assert */
sys_mbox_free(&fwtcp->connmbox);
free(fwtcp);
}
/**
* Mapping from loopback to local network for inbound (port-forwarded)
* connections.
*
* Copy "src" to "dst" with ip6_addr_set(dst, src), but if "src" is a
* host's loopback address, copy local network address that maps it to
* "dst".
*/
int
pxremap_inbound_ip6(ip6_addr_t *dst, ip6_addr_t *src)
{
ip6_addr_t loopback;
struct netif *netif;
int i;
ip6_addr_set_loopback(&loopback);
if (!ip6_addr_cmp(src, &loopback)) {
ip6_addr_set(dst, src);
return PXREMAP_ASIS;
}
#if 0 /* ?TODO: with multiple interfaces we need to consider fwspec::dst */
netif = ip6_route_fwd(target);
if (netif == NULL) {
return PXREMAP_FAILED;
}
#else
netif = netif_list;
LWIP_ASSERT1(netif != NULL);
LWIP_ASSERT1(netif->next == NULL);
#endif
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; ++i) {
ip6_addr_t *ifaddr = netif_ip6_addr(netif, i);
if (ip6_addr_ispreferred(netif_ip6_addr_state(netif, i))
&& ip6_addr_isuniquelocal(ifaddr))
{
ip6_addr_set(dst, ifaddr);
++((u8_t *)&dst->addr[3])[3];
return PXREMAP_MAPPED;
}
}
return PXREMAP_FAILED;
}
int
fwspec_set(struct fwspec *fwspec, int sdom, int stype,
const char *src_addr_str, uint16_t src_port,
const char *dst_addr_str, uint16_t dst_port)
{
struct addrinfo hints;
struct addrinfo *ai;
int status;
LWIP_ASSERT1(sdom == PF_INET || sdom == PF_INET6);
LWIP_ASSERT1(stype == SOCK_STREAM || stype == SOCK_DGRAM);
fwspec->sdom = sdom;
fwspec->stype = stype;
memset(&hints, 0, sizeof(hints));
hints.ai_family = (sdom == PF_INET) ? AF_INET : AF_INET6;
hints.ai_socktype = stype;
hints.ai_flags = AI_NUMERICHOST;
status = getaddrinfo(src_addr_str, NULL, &hints, &ai);
if (status != 0) {
LogRel(("\"%s\": %s\n", src_addr_str, gai_strerror(status)));
return -1;
}
LWIP_ASSERT1(ai != NULL);
LWIP_ASSERT1(ai->ai_addrlen <= sizeof(fwspec->src));
memcpy(&fwspec->src, ai->ai_addr, ai->ai_addrlen);
freeaddrinfo(ai);
ai = NULL;
status = getaddrinfo(dst_addr_str, NULL, &hints, &ai);
if (status != 0) {
LogRel(("\"%s\": %s\n", dst_addr_str, gai_strerror(status)));
return -1;
}
LWIP_ASSERT1(ai != NULL);
LWIP_ASSERT1(ai->ai_addrlen <= sizeof(fwspec->dst));
memcpy(&fwspec->dst, ai->ai_addr, ai->ai_addrlen);
freeaddrinfo(ai);
ai = NULL;
if (sdom == PF_INET) {
fwspec->src.sin.sin_port = htons(src_port);
fwspec->dst.sin.sin_port = htons(dst_port);
}
else { /* PF_INET6 */
fwspec->src.sin6.sin6_port = htons(src_port);
fwspec->dst.sin6.sin6_port = htons(dst_port);
}
return 0;
}
/**
* Create strongly held refptr.
*/
struct pollmgr_refptr *
pollmgr_refptr_create(struct pollmgr_handler *ptr)
{
struct pollmgr_refptr *rp;
LWIP_ASSERT1(ptr != NULL);
rp = (struct pollmgr_refptr *)malloc(sizeof (*rp));
if (rp == NULL) {
return NULL;
}
sys_mutex_new(&rp->lock);
rp->ptr = ptr;
rp->strong = 1;
rp->weak = 0;
return rp;
}