// 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);
-
}
|| 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_preferred_interface_address(int ifindex, struct in6_addr *addr)
+int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr)
{
- struct odhcpd_ipaddr ipaddrs[8];
- ssize_t ip_cnt = odhcpd_get_interface_addresses(ifindex, ipaddrs, ARRAY_SIZE(ipaddrs));
- uint32_t preferred = 0;
- int ret = 0;
-
- for (ssize_t i = 0; i < ip_cnt; i++) {
- struct odhcpd_ipaddr *ipaddr = &ipaddrs[i];
-
- if (ipaddr->preferred > preferred || !preferred) {
- preferred = ipaddr->preferred;
- *addr = ipaddr->addr;
- ret = 1;
+ 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;
}
- return ret;
+ 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)
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);
}