uloop_end();
}
+static void print_usage(const char *app)
+{
+ printf(
+ "== %s Usage ==\n\n"
+ " -h, --help Print this help\n"
+ " -l level Specify log level 0..7 (default %d)\n",
+ app, LOG_WARNING
+ );
+}
-int main()
+int main(int argc, char **argv)
{
openlog("odhcpd", LOG_PERROR | LOG_PID, LOG_DAEMON);
- setlogmask(LOG_UPTO(LOG_WARNING));
+ int opt;
+ int log_level = LOG_WARNING;
+ while ((opt = getopt(argc, argv, "hl:")) != -1) {
+ switch (opt) {
+ case 'h':
+ print_usage(argv[0]);
+ return 0;
+ case 'l':
+ log_level = atoi(optarg);
+ fprintf(stderr, "Log level set to %d\n", log_level);
+ break;
+ }
+ }
+ setlogmask(LOG_UPTO(log_level));
uloop_init();
if (getuid() != 0) {
// Read IPv6 MTU for interface
-int odhcpd_get_interface_mtu(const char *ifname)
+int odhcpd_get_interface_config(const char *ifname, const char *what)
{
char buf[64];
- const char *sysctl_pattern = "/proc/sys/net/ipv6/conf/%s/mtu";
- snprintf(buf, sizeof(buf), sysctl_pattern, ifname);
+ const char *sysctl_pattern = "/proc/sys/net/ipv6/conf/%s/%s";
+ snprintf(buf, sizeof(buf), sysctl_pattern, ifname, what);
int fd = open(buf, O_RDONLY);
ssize_t len = read(fd, buf, sizeof(buf) - 1);
if (len < 0)
return -1;
-
buf[len] = 0;
return atoi(buf);
-
}
{
// Construct headers
uint8_t cmsg_buf[CMSG_SPACE(sizeof(struct in6_pktinfo))] = {0};
- struct msghdr msg = {(void*)dest, sizeof(*dest), iov, iov_len,
- cmsg_buf, sizeof(cmsg_buf), 0};
+ struct msghdr msg = {
+ .msg_name = (void *) dest,
+ .msg_namelen = sizeof(*dest),
+ .msg_iov = iov,
+ .msg_iovlen = iov_len,
+ .msg_control = cmsg_buf,
+ .msg_controllen = sizeof(cmsg_buf),
+ .msg_flags = 0
+ };
// Set control data (define destination interface)
struct cmsghdr *chdr = CMSG_FIRSTHDR(&msg);
|| IN6_IS_ADDR_MC_LINKLOCAL(&dest->sin6_addr))
dest->sin6_scope_id = iface->ifindex;
- // IPV6_PKTINFO doesn't really work for IPv6-raw sockets (bug?)
- if (dest->sin6_port == 0) {
- msg.msg_control = NULL;
- msg.msg_controllen = 0;
- }
-
char ipbuf[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, &dest->sin6_addr, ipbuf, sizeof(ipbuf));
if (ifa->ifa_flags & IFA_F_DEPRECATED)
addrs[ret].preferred = 0;
- addrs[ret].has_class = false;
- addrs[ret].class = 0;
-#ifdef WITH_UBUS
- struct interface *iface = odhcpd_get_interface_by_index(ifindex);
- if (iface)
- addrs[ret].has_class = ubus_get_class(iface->ifname,
- &addrs[ret].addr, &addrs[ret].class);
-#endif
++ret;
}
return ret;
}
+int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr)
+{
+ int status = -1;
+ struct sockaddr_in6 addr = {AF_INET6, 0, 0, ALL_IPV6_ROUTERS, ifindex};
+ socklen_t alen = sizeof(addr);
+ int sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
+
+ if (!connect(sock, (struct sockaddr*)&addr, sizeof(addr)) &&
+ !getsockname(sock, (struct sockaddr*)&addr, &alen)) {
+ *lladdr = addr.sin6_addr;
+ status = 0;
+ }
+
+ close(sock);
+ return status;
+}
+
+void odhcpd_setup_route(const struct in6_addr *addr, int prefixlen,
+ const struct interface *iface, const struct in6_addr *gw,
+ int metric, bool add)
+{
+ struct req {
+ struct nlmsghdr nh;
+ struct rtmsg rtm;
+ struct rtattr rta_dst;
+ struct in6_addr dst_addr;
+ struct rtattr rta_oif;
+ uint32_t ifindex;
+ struct rtattr rta_table;
+ uint32_t table;
+ struct rtattr rta_prio;
+ uint32_t prio;
+ struct rtattr rta_gw;
+ struct in6_addr gw;
+ } req = {
+ {sizeof(req), 0, NLM_F_REQUEST, ++rtnl_seq, 0},
+ {AF_INET6, prefixlen, 0, 0, 0, 0, 0, 0, 0},
+ {sizeof(struct rtattr) + sizeof(struct in6_addr), RTA_DST},
+ *addr,
+ {sizeof(struct rtattr) + sizeof(uint32_t), RTA_OIF},
+ iface->ifindex,
+ {sizeof(struct rtattr) + sizeof(uint32_t), RTA_TABLE},
+ RT_TABLE_MAIN,
+ {sizeof(struct rtattr) + sizeof(uint32_t), RTA_PRIORITY},
+ metric,
+ {sizeof(struct rtattr) + sizeof(struct in6_addr), RTA_GATEWAY},
+ IN6ADDR_ANY_INIT,
+ };
+
+ if (gw)
+ req.gw = *gw;
+
+ if (add) {
+ req.nh.nlmsg_type = RTM_NEWROUTE;
+ req.nh.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE);
+ req.rtm.rtm_protocol = RTPROT_STATIC;
+ req.rtm.rtm_scope = (gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
+ req.rtm.rtm_type = RTN_UNICAST;
+ } else {
+ req.nh.nlmsg_type = RTM_DELROUTE;
+ req.rtm.rtm_scope = RT_SCOPE_NOWHERE;
+ }
+
+ req.nh.nlmsg_len = (gw) ? sizeof(req) : offsetof(struct req, rta_gw);
+ send(rtnl_socket, &req, req.nh.nlmsg_len, MSG_DONTWAIT);
+}
struct interface* odhcpd_get_interface_by_index(int ifindex)
{
struct sockaddr_nl nl;
} addr;
+ if (u->error) {
+ int ret = -1;
+ socklen_t ret_len = sizeof(ret);
+ getsockopt(u->fd, SOL_SOCKET, SO_ERROR, &ret, &ret_len);
+ u->error = false;
+ if (e->handle_error)
+ e->handle_error(ret);
+ }
+
while (true) {
struct iovec iov = {data_buf, sizeof(data_buf)};
- struct msghdr msg = {&addr, sizeof(addr), &iov, 1,
- cmsg_buf, sizeof(cmsg_buf), 0};
+ struct msghdr msg = {
+ .msg_name = (void *) &addr,
+ .msg_namelen = sizeof(addr),
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ .msg_control = cmsg_buf,
+ .msg_controllen = sizeof(cmsg_buf),
+ .msg_flags = 0
+ };
ssize_t len = recvmsg(u->fd, &msg, MSG_DONTWAIT);
if (len < 0) {
else if (addr.in.sin_family == AF_INET)
inet_ntop(AF_INET, &addr.in.sin_addr, ipbuf, sizeof(ipbuf));
- syslog(LOG_DEBUG, "--");
syslog(LOG_DEBUG, "Received %li Bytes from %s%%%s", (long)len,
ipbuf, (iface) ? iface->ifname : "netlink");
int odhcpd_register(struct odhcpd_event *event)
{
event->uloop.cb = odhcpd_receive_packets;
- return uloop_fd_add(&event->uloop, ULOOP_READ);
+ return uloop_fd_add(&event->uloop, ULOOP_READ |
+ ((event->handle_error) ? ULOOP_ERROR_CB : 0));
}
void odhcpd_process(struct odhcpd_event *event)
odhcpd_receive_packets(&event->uloop, 0);
}
-void odhcpd_urandom(void *data, size_t len)
+int odhcpd_urandom(void *data, size_t len)
{
- read(urandom_fd, data, len);
+ return read(urandom_fd, data, len);
}
projects / project / odhcpd.git / blobdiff