*/
#include <sys/types.h>
#include <sys/socket.h>
+#include <sys/un.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <libubox/list.h>
#include <libubox/uloop.h>
+#include <libubox/usock.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
static char pex_tx_buf[PEX_BUF_SIZE];
static FILE *pex_urandom;
-static struct uloop_fd pex_fd;
+static struct uloop_fd pex_fd, pex_unix_fd;
static LIST_HEAD(requests);
static struct uloop_timeout gc_timer;
static int pex_raw_v4_fd = -1, pex_raw_v6_fd = -1;
static pex_recv_cb_t pex_recv_cb;
+static pex_recv_control_cb_t pex_control_cb;
+static int pex_unix_tx_fd = -1;
+
+static const void *
+get_mapped_sockaddr(const void *addr)
+{
+ static struct sockaddr_in6 sin6;
+ const struct sockaddr_in *sin = addr;
+
+ if (!sin || sin->sin_family != AF_INET)
+ return addr;
+
+ memset(&sin6, 0, sizeof(sin6));
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_addr.s6_addr[10] = 0xff;
+ sin6.sin6_addr.s6_addr[11] = 0xff;
+ memcpy(&sin6.sin6_addr.s6_addr[12], &sin->sin_addr, sizeof(struct in_addr));
+ sin6.sin6_port = sin->sin_port;
+
+ return &sin6;
+}
struct pex_msg_update_recv_ctx {
struct list_head list;
static void
pex_fd_cb(struct uloop_fd *fd, unsigned int events)
{
- struct sockaddr_in6 sin6;
- static char buf[PEX_BUF_SIZE];
+ static struct sockaddr_in6 sin6;
+ static char buf[PEX_RX_BUF_SIZE];
struct pex_hdr *hdr = (struct pex_hdr *)buf;
ssize_t len;
while (1) {
+ static struct iovec iov[2] = {
+ { .iov_base = &sin6 },
+ { .iov_base = buf },
+ };
+ static struct msghdr msg = {
+ .msg_iov = iov,
+ .msg_iovlen = ARRAY_SIZE(iov),
+ };
socklen_t slen = sizeof(sin6);
len = recvfrom(fd->fd, buf, sizeof(buf), 0, (struct sockaddr *)&sin6, &slen);
if (!len)
continue;
+ if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
+ struct sockaddr_in *sin = (struct sockaddr_in *)&sin6;
+ struct in_addr in = *(struct in_addr *)&sin6.sin6_addr.s6_addr[12];
+ int port = sin6.sin6_port;
+
+ memset(&sin6, 0, sizeof(sin6));
+ sin->sin_port = port;
+ sin->sin_family = AF_INET;
+ sin->sin_addr = in;
+ slen = sizeof(*sin);
+ }
+
+retry:
+ if (pex_unix_tx_fd >= 0) {
+ iov[0].iov_len = slen;
+ iov[1].iov_len = len;
+ if (sendmsg(pex_unix_tx_fd, &msg, 0) < 0) {
+ switch (errno) {
+ case EINTR:
+ goto retry;
+ case EMSGSIZE:
+ case ENOBUFS:
+ case EAGAIN:
+ continue;
+ default:
+ perror("sendmsg");
+ close(pex_unix_tx_fd);
+ pex_unix_tx_fd = -1;
+ break;
+ }
+ }
+ }
+
if (len < sizeof(*hdr) + sizeof(struct pex_ext_hdr))
continue;
}
}
+static void
+pex_unix_cb(struct uloop_fd *fd, unsigned int events)
+{
+ static char buf[PEX_RX_BUF_SIZE];
+ static struct iovec iov = {
+ .iov_base = buf,
+ .iov_len = sizeof(buf),
+ };
+ ssize_t len;
+
+ while (1) {
+ const struct sockaddr *sa = (struct sockaddr *)buf;
+ uint8_t fd_buf[CMSG_SPACE(sizeof(int))] = { 0 };
+ struct msghdr msg = {
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ .msg_control = fd_buf,
+ .msg_controllen = CMSG_LEN(sizeof(int)),
+ };
+ struct cmsghdr *cmsg;
+ socklen_t slen;
+ int *pfd;
+
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+
+ pfd = (int *)CMSG_DATA(cmsg);
+ *pfd = -1;
+
+ len = recvmsg(fd->fd, &msg, 0);
+ if (len < 0) {
+ if (errno == EINTR)
+ continue;
+
+ if (errno == EAGAIN)
+ break;
+
+ pex_close();
+ return;
+ }
+
+ if (*pfd >= 0) {
+ if (pex_unix_tx_fd >= 0)
+ close(pex_unix_tx_fd);
+
+ pex_unix_tx_fd = *pfd;
+ }
+
+ if (!len)
+ continue;
+
+ if (len < sizeof(*sa))
+ continue;
+
+ if (sa->sa_family == AF_LOCAL) {
+ slen = sizeof(struct sockaddr);
+ len -= slen;
+ if (len < sizeof(struct pex_msg_local_control))
+ continue;
+
+ if (pex_control_cb)
+ pex_control_cb((struct pex_msg_local_control *)&buf[slen], len);
+
+ continue;
+ }
+
+ if (sa->sa_family == AF_INET)
+ slen = sizeof(struct sockaddr_in);
+ else if (sa->sa_family == AF_INET6)
+ slen = sizeof(struct sockaddr_in6);
+ else
+ continue;
+
+ sa = get_mapped_sockaddr(sa);
+ sendto(pex_fd.fd, buf + slen, len - slen, 0, sa, sizeof(struct sockaddr_in6));
+ }
+}
+
static inline uint32_t
csum_tcpudp_nofold(uint32_t saddr, uint32_t daddr, uint32_t len, uint8_t proto)
{
hdr->len -= sizeof(struct pex_ext_hdr);
if (ip_hdrlen)
fd = sa->sa_family == AF_INET6 ? pex_raw_v6_fd : pex_raw_v4_fd;
- else
+ else {
fd = pex_fd.fd;
+ sa = addr = get_mapped_sockaddr(addr);
+ }
if (fd < 0)
return -1;
return -1;
}
-void pex_close(void)
+int pex_unix_open(const char *path, pex_recv_control_cb_t cb)
{
- if (!pex_fd.cb)
- return;
+ mode_t prev_mask;
+ int fd;
+
+ pex_control_cb = cb;
+ unlink(path);
+ prev_mask = umask(0177);
+ fd = usock(USOCK_UDP | USOCK_UNIX | USOCK_SERVER | USOCK_NONBLOCK, path, NULL);
+ umask(prev_mask);
+ if (fd < 0)
+ return -1;
+
+ pex_unix_fd.cb = pex_unix_cb;
+ pex_unix_fd.fd = fd;
+ uloop_fd_add(&pex_unix_fd, ULOOP_READ);
+
+ return 0;
+}
+
+void pex_close(void)
+{
if (pex_raw_v4_fd >= 0)
close(pex_raw_v4_fd);
if (pex_raw_v6_fd >= 0)
pex_raw_v4_fd = -1;
pex_raw_v6_fd = -1;
- fclose(pex_urandom);
- uloop_fd_delete(&pex_fd);
- close(pex_fd.fd);
+ if (pex_urandom)
+ fclose(pex_urandom);
+
+ if (pex_fd.cb) {
+ uloop_fd_delete(&pex_fd);
+ close(pex_fd.fd);
+ }
+
+ if (pex_unix_fd.cb) {
+ uloop_fd_delete(&pex_unix_fd);
+ close(pex_unix_fd.fd);
+ }
+
pex_fd.cb = NULL;
+ pex_unix_fd.cb = NULL;
pex_urandom = NULL;
}
if (!peer)
break;
- if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
- struct sockaddr_in *sin = (struct sockaddr_in *)addr;
- struct in_addr in = *(struct in_addr *)&addr->sin6_addr.s6_addr[12];
- int port = addr->sin6_port;
-
- memset(addr, 0, sizeof(*addr));
- sin->sin_port = port;
- sin->sin_family = AF_INET;
- sin->sin_addr = in;
- }
-
D_PEER(net, peer, "receive endpoint notification from %s",
inet_ntop(addr->sin6_family, network_endpoint_addr((void *)addr, &addr_len),
buf, sizeof(buf)));
}
}
-int global_pex_open(void)
+static void
+pex_recv_control(struct pex_msg_local_control *msg, int len)
+{
+ struct network *net;
+
+ if (msg->msg_type != 0)
+ return;
+
+ net = global_pex_find_network(msg->auth_id);
+ if (!net)
+ return;
+
+ if (!msg->timeout)
+ msg->timeout = 60;
+ network_pex_create_host(net, &msg->ep, msg->timeout);
+}
+
+int global_pex_open(const char *unix_path)
{
struct sockaddr_in6 sin6 = {};
+ int ret;
sin6.sin6_family = AF_INET6;
sin6.sin6_port = htons(global_pex_port);
- return pex_open(&sin6, sizeof(sin6), global_pex_recv, true);
+ ret = pex_open(&sin6, sizeof(sin6), global_pex_recv, true);
+
+ if (unix_path)
+ pex_unix_open(unix_path, pex_recv_control);
+
+ return ret;
}