#define SYSLOG_NAMES
#include <syslog.h>
#include <malloc.h>
-#include <math.h>
#include <net/route.h>
#include <sys/mman.h>
#include <netdb.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
-#include <linux/if.h>
+#include <net/if.h>
#include <stddef.h>
#include <time.h>
#include <dlfcn.h>
struct Tringbuffer *ringbuffer = NULL;
#endif
+static ssize_t netlink_send(struct nlmsghdr *nh);
+static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen);
static void cache_ipmap(in_addr_t ip, sessionidt s);
static void uncache_ipmap(in_addr_t ip);
static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s);
//
static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, int add)
{
- struct rtentry r;
- in_addr_t mask;
+ struct {
+ struct nlmsghdr nh;
+ struct rtmsg rt;
+ char buf[32];
+ } req;
int i;
+ in_addr_t n_ip;
if (!prefixlen) prefixlen = 32;
- mask = 0xffffffff << (32 - prefixlen);
+ ip &= 0xffffffff << (32 - prefixlen);; // Force the ip to be the first one in the route.
- ip &= mask; // Force the ip to be the first one in the route.
+ memset(&req, 0, sizeof(req));
- memset(&r, 0, sizeof(r));
- r.rt_dev = config->tundevice;
- r.rt_dst.sa_family = AF_INET;
- *(uint32_t *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);
- r.rt_gateway.sa_family = AF_INET;
- *(uint32_t *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw);
- r.rt_genmask.sa_family = AF_INET;
- *(uint32_t *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask);
- r.rt_flags = (RTF_UP | RTF_STATIC);
+ if (add)
+ {
+ req.nh.nlmsg_type = RTM_NEWROUTE;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
+ }
+ else
+ {
+ req.nh.nlmsg_type = RTM_DELROUTE;
+ req.nh.nlmsg_flags = NLM_F_REQUEST;
+ }
+
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
+
+ req.rt.rtm_family = AF_INET;
+ req.rt.rtm_dst_len = prefixlen;
+ req.rt.rtm_table = RT_TABLE_MAIN;
+ req.rt.rtm_protocol = RTPROT_BOOT; // XXX
+ req.rt.rtm_scope = RT_SCOPE_LINK;
+ req.rt.rtm_type = RTN_UNICAST;
+
+ netlink_addattr(&req.nh, RTA_OIF, &tunidx, sizeof(int));
+ n_ip = htonl(ip);
+ netlink_addattr(&req.nh, RTA_DST, &n_ip, sizeof(n_ip));
if (gw)
- r.rt_flags |= RTF_GATEWAY;
- else if (prefixlen == 32)
- r.rt_flags |= RTF_HOST;
+ {
+ n_ip = htonl(gw);
+ netlink_addattr(&req.nh, RTA_GATEWAY, &n_ip, sizeof(n_ip));
+ }
LOG(1, s, 0, "Route %s %s/%d%s%s\n", add ? "add" : "del",
fmtaddr(htonl(ip), 0), prefixlen,
gw ? " via" : "", gw ? fmtaddr(htonl(gw), 2) : "");
- if (ioctl(ifrfd, add ? SIOCADDRT : SIOCDELRT, (void *) &r) < 0)
- LOG(0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno));
+ if (netlink_send(&req.nh) < 0)
+ LOG(0, 0, 0, "routeset() error in sending netlink message: %s\n", strerror(errno));
#ifdef BGP
if (add)
void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add)
{
- struct in6_rtmsg rt;
+ struct {
+ struct nlmsghdr nh;
+ struct rtmsg rt;
+ char buf[64];
+ } req;
+ int metric;
char ipv6addr[INET6_ADDRSTRLEN];
- if (ifr6fd < 0)
+ if (!config->ipv6_prefix.s6_addr[0])
{
LOG(0, 0, 0, "Asked to set IPv6 route, but IPv6 not setup.\n");
return;
}
- memset(&rt, 0, sizeof(rt));
+ memset(&req, 0, sizeof(req));
+
+ if (add)
+ {
+ req.nh.nlmsg_type = RTM_NEWROUTE;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
+ }
+ else
+ {
+ req.nh.nlmsg_type = RTM_DELROUTE;
+ req.nh.nlmsg_flags = NLM_F_REQUEST;
+ }
+
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
+
+ req.rt.rtm_family = AF_INET6;
+ req.rt.rtm_dst_len = prefixlen;
+ req.rt.rtm_table = RT_TABLE_MAIN;
+ req.rt.rtm_protocol = RTPROT_BOOT; // XXX
+ req.rt.rtm_scope = RT_SCOPE_LINK;
+ req.rt.rtm_type = RTN_UNICAST;
- memcpy(&rt.rtmsg_dst, &ip, sizeof(struct in6_addr));
- rt.rtmsg_dst_len = prefixlen;
- rt.rtmsg_metric = 1;
- rt.rtmsg_flags = RTF_UP;
- rt.rtmsg_ifindex = tunidx;
+ netlink_addattr(&req.nh, RTA_OIF, &tunidx, sizeof(int));
+ netlink_addattr(&req.nh, RTA_DST, &ip, sizeof(ip));
+ metric = 1;
+ netlink_addattr(&req.nh, RTA_METRICS, &metric, sizeof(metric));
LOG(1, 0, 0, "Route %s %s/%d\n",
add ? "add" : "del",
inet_ntop(AF_INET6, &ip, ipv6addr, INET6_ADDRSTRLEN),
prefixlen);
- if (ioctl(ifr6fd, add ? SIOCADDRT : SIOCDELRT, (void *) &rt) < 0)
- LOG(0, 0, 0, "route6set() error in ioctl: %s\n",
- strerror(errno));
+ if (netlink_send(&req.nh) < 0)
+ LOG(0, 0, 0, "route6set() error in sending netlink message: %s\n", strerror(errno));
// FIXME: need to add BGP routing (RFC2858)
}
/* adapted from iproute2 */
-void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen)
+static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen)
{
int len = RTA_LENGTH(alen);
struct rtattr *rta;
// Set up TUN interface
static void inittun(void)
{
- struct ifinfomsg ifinfo;
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
assert(strlen(ifr.ifr_name) < sizeof(config->tundevice) - 1);
strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice));
+ tunidx = if_nametoindex(config->tundevice);
+ if (tunidx == 0)
{
- // get the interface index
- struct {
- struct nlmsghdr nh;
- struct ifinfomsg ifinfo __attribute__ ((aligned(NLMSG_ALIGNTO)));
- struct rtattr ifname_rta __attribute__ ((aligned(RTA_ALIGNTO)));
- char ifname[IFNAMSIZ];
- } req;
- char buf[4096];
- ssize_t len;
- struct nlmsghdr *resp_nh;
-
- req.nh.nlmsg_type = RTM_GETLINK;
- req.nh.nlmsg_flags = NLM_F_REQUEST;
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifinfo));
-
- req.ifinfo.ifi_family = AF_UNSPEC; // as the man says
-
- netlink_addattr(&req.nh, IFLA_IFNAME, config->tundevice, strlen(config->tundevice)+1);
-
- if(netlink_send(&req.nh) < 0 || (len = netlink_recv(buf, sizeof(buf))) < 0)
- {
- LOG(0, 0, 0, "Error getting tun ifindex: %s\n", strerror(errno));
- exit(1);
- }
-
- resp_nh = (struct nlmsghdr *)buf;
- if (!NLMSG_OK (resp_nh, len))
- {
- LOG(0, 0, 0, "Malformed answer getting tun ifindex %ld\n", len);
- exit(1);
- }
-
- memcpy(&ifinfo, NLMSG_DATA(resp_nh), sizeof(ifinfo));
- // got index
- tunidx = ifinfo.ifi_index;
+ LOG(0, 0, 0, "Can't get tun interface index\n");
+ exit(1);
}
+
{
struct {
// interface setting
union {
struct ifinfomsg ifinfo;
struct ifaddrmsg ifaddr;
- } ifmsg __attribute__ ((aligned(NLMSG_ALIGNTO)));
+ } ifmsg;
char rtdata[32]; // 32 should be enough
} req;
uint32_t txqlen, mtu;
- struct in_addr ip;
+ in_addr_t ip;
memset(&req, 0, sizeof(req));
- req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_type = RTM_NEWLINK;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_MULTI;
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo));
- req.ifmsg.ifinfo = ifinfo;
+ req.ifmsg.ifinfo.ifi_family = AF_UNSPEC;
+ req.ifmsg.ifinfo.ifi_index = tunidx;
req.ifmsg.ifinfo.ifi_flags |= IFF_UP; // set interface up
req.ifmsg.ifinfo.ifi_change = IFF_UP; // only change this flag
memset(&req, 0, sizeof(req));
req.nh.nlmsg_type = RTM_NEWADDR;
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
req.ifmsg.ifaddr.ifa_family = AF_INET;
req.ifmsg.ifaddr.ifa_prefixlen = 32;
- req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
+ req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
+ req.ifmsg.ifaddr.ifa_index = tunidx;
if (config->bind_address)
- ip.s_addr = config->bind_address;
+ ip = config->bind_address;
else
- ip.s_addr = 0x01010101, // 1.1.1.1
+ ip = 0x01010101; // 1.1.1.1
netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip));
if (netlink_send(&req.nh) < 0)
memset(&req, 0, sizeof(req));
req.nh.nlmsg_type = RTM_NEWADDR;
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
req.ifmsg.ifaddr.ifa_family = AF_INET6;
req.ifmsg.ifaddr.ifa_prefixlen = 64;
req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_LINK;
- req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
+ req.ifmsg.ifaddr.ifa_index = tunidx;
// Link local address is FE80::1
memset(&ip6, 0, sizeof(ip6));
memset(&req, 0, sizeof(req));
req.nh.nlmsg_type = RTM_NEWADDR;
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
req.ifmsg.ifaddr.ifa_family = AF_INET6;
req.ifmsg.ifaddr.ifa_prefixlen = 64;
req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
- req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
+ req.ifmsg.ifaddr.ifa_index = tunidx;
// Global address is prefix::1
ip6 = config->ipv6_prefix;
projects / l2tpns.git / blobdiff