+int bus_machine_method_get_addresses(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_close_pair_ int pair[2] = { -1, -1 };
+ _cleanup_free_ char *us = NULL, *them = NULL;
+ _cleanup_close_ int netns_fd = -1;
+ Machine *m = userdata;
+ const char *p;
+ siginfo_t si;
+ pid_t child;
+ int r;
+
+ assert(bus);
+ assert(message);
+ assert(m);
+
+ r = readlink_malloc("/proc/self/ns/net", &us);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ p = procfs_file_alloca(m->leader, "ns/net");
+ r = readlink_malloc(p, &them);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ if (streq(us, them))
+ return sd_bus_error_setf(error, BUS_ERROR_NO_PRIVATE_NETWORKING, "Machine %s does not use private networking", m->name);
+
+ r = namespace_open(m->leader, NULL, NULL, &netns_fd, NULL);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, pair) < 0)
+ return sd_bus_error_set_errno(error, -errno);
+
+ child = fork();
+ if (child < 0)
+ return sd_bus_error_set_errno(error, -errno);
+
+ if (child == 0) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *resp = NULL;
+ _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ sd_rtnl_message *addr;
+
+ pair[0] = safe_close(pair[0]);
+
+ r = namespace_enter(-1, -1, netns_fd, -1);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ r = sd_rtnl_open(&rtnl, 0);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ r = sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ r = sd_rtnl_message_request_dump(req, true);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ r = sd_rtnl_call(rtnl, req, 0, &resp);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ for (addr = resp; addr; addr = sd_rtnl_message_next(addr)) {
+ uint16_t type;
+ unsigned char family;
+ union {
+ struct in_addr in;
+ struct in6_addr in6;
+ } in_addr;
+ struct iovec iov[2];
+
+ r = sd_rtnl_message_get_type(addr, &type);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ if (type != RTM_NEWADDR)
+ continue;
+
+ r = sd_rtnl_message_addr_get_family(addr, &family);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ iov[0] = (struct iovec) { .iov_base = &family, .iov_len = sizeof(family) };
+
+ switch (family) {
+
+ case AF_INET:
+
+ r = sd_rtnl_message_read_in_addr(addr, IFA_LOCAL, &in_addr.in);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ if (in_addr.in.s_addr == htobe32(INADDR_LOOPBACK))
+ continue;
+
+ iov[1] = (struct iovec) { .iov_base = &in_addr.in, .iov_len = sizeof(in_addr.in) };
+ break;
+
+ case AF_INET6:
+
+ r = sd_rtnl_message_read_in6_addr(addr, IFA_ADDRESS, &in_addr.in6);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ if (IN6_IS_ADDR_LOOPBACK(&in_addr.in6))
+ continue;
+
+ iov[1] = (struct iovec) { .iov_base = &in_addr.in6, .iov_len = sizeof(in_addr.in6) };
+ break;
+
+ default:
+ continue;
+ }
+
+ r = writev(pair[1], iov, 2);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+ }
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ pair[1] = safe_close(pair[1]);
+
+ r = sd_bus_message_new_method_return(message, &reply);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ r = sd_bus_message_open_container(reply, 'a', "(yay)");
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ for (;;) {
+ unsigned char family;
+ ssize_t n;
+ union {
+ struct in_addr in;
+ struct in6_addr in6;
+ } in_addr;
+ struct iovec iov[2];
+ struct msghdr mh = {
+ .msg_iov = iov,
+ .msg_iovlen = 2,
+ };
+
+ iov[0] = (struct iovec) { .iov_base = &family, .iov_len = sizeof(family) };
+ iov[1] = (struct iovec) { .iov_base = &in_addr, .iov_len = sizeof(in_addr) };
+
+ n = recvmsg(pair[0], &mh, 0);
+ if (n < 0)
+ return sd_bus_error_set_errno(error, -errno);
+ if ((size_t) n < sizeof(family))
+ break;
+
+ r = sd_bus_message_open_container(reply, 'r', "yay");
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ r = sd_bus_message_append(reply, "y", family);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ switch (family) {
+
+ case AF_INET:
+ if (n != sizeof(struct in_addr) + sizeof(family))
+ return sd_bus_error_set_errno(error, EIO);
+
+ r = sd_bus_message_append_array(reply, 'y', &in_addr.in, sizeof(in_addr.in));
+ break;
+
+ case AF_INET6:
+ if (n != sizeof(struct in6_addr) + sizeof(family))
+ return sd_bus_error_set_errno(error, EIO);
+
+ r = sd_bus_message_append_array(reply, 'y', &in_addr.in6, sizeof(in_addr.in6));
+ break;
+ }
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+ }
+
+ r = wait_for_terminate(child, &si);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+ if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
+ return sd_bus_error_set_errno(error, EIO);
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ return sd_bus_send(bus, reply, NULL);
+}
+
~ianmdlvl / elogind.git / commitdiff