char hostname[1000] = ""; // us.
static int tunidx; // ifr_ifindex of tun device
int nlseqnum = 0; // netlink sequence number
+int min_initok_nlseqnum = 0; // minimun seq number for messages after init is ok
static int syslog_log = 0; // are we logging to syslog
static FILE *log_stream = 0; // file handle for direct logging (i.e. direct into file, not via syslog).
uint32_t last_id = 0; // Unique ID for radius accounting
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);
// via BGP if enabled, and stuffs it into the
// 'sessionbyip' cache.
//
-// 'ip' and 'mask' must be in _host_ order.
+// 'ip' must be in _host_ order.
//
-static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, int add)
+static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, int add)
{
- struct rtentry r;
+ struct {
+ struct nlmsghdr nh;
+ struct rtmsg rt;
+ char buf[32];
+ } req;
int i;
+ in_addr_t n_ip;
- if (!mask) mask = 0xffffffff;
+ if (!prefixlen) prefixlen = 32;
- ip &= mask; // Force the ip to be the first one in the route.
+ ip &= 0xffffffff << (32 - prefixlen);; // Force the ip to be the first one in the route.
- 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);
+ 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_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 (mask == 0xffffffff)
- 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/%s%s%s\n", add ? "add" : "del",
- fmtaddr(htonl(ip), 0), fmtaddr(htonl(mask), 1),
+ 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)
- bgp_add_route(htonl(ip), htonl(mask));
+ bgp_add_route(htonl(ip), prefixlen);
else
- bgp_del_route(htonl(ip), htonl(mask));
+ bgp_del_route(htonl(ip), prefixlen);
#endif /* BGP */
// Add/Remove the IPs to the 'sessionbyip' cache.
if (!add) // Are we deleting a route?
s = 0; // Caching the session as '0' is the same as uncaching.
- for (i = ip; (i&mask) == (ip&mask) ; ++i)
+ for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i)
cache_ipmap(i, s);
}
}
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_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)
}
}
-static ssize_t netlink_send(struct nlmsghdr *nh, int want_ack)
+static ssize_t netlink_send(struct nlmsghdr *nh)
{
struct sockaddr_nl nladdr;
struct iovec iov;
nh->nlmsg_pid = getpid();
nh->nlmsg_seq = ++nlseqnum;
- if (want_ack)
- nh->nlmsg_flags |= NLM_F_ACK;
// set kernel address
memset(&nladdr, 0, sizeof(nladdr));
return sendmsg(nlfd, &msg, 0);
}
-static ssize_t netlink_recv(char *buf, ssize_t len)
+static ssize_t netlink_recv(void *buf, ssize_t len)
{
struct sockaddr_nl nladdr;
struct iovec iov;
return recvmsg(nlfd, &msg, 0);
}
-static ssize_t netlink_check_ack(struct nlmsghdr *ack_nh, int msg_count)
+/* adapted from iproute2 */
+static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen)
{
- ssize_t len;
- uint32_t seqnum;
-
- // expect ack
- for (; NLMSG_OK (ack_nh, len); ack_nh = NLMSG_NEXT (ack_nh, len))
- {
- if (ack_nh->nlmsg_type == NLMSG_DONE)
- return msg_count != 0 || seqnum != nlseqnum;
- // 1 => lost an ack
-
- if (ack_nh->nlmsg_type == NLMSG_ERROR)
- {
- struct nlmsgerr *errmsg = NLMSG_DATA(ack_nh);
- if (errmsg->error)
- return errmsg->error; // got an error back
- else
- {
- // ack received
- --msg_count;
- if (errmsg->msg.nlmsg_seq > seqnum);
- seqnum = errmsg->msg.nlmsg_seq;
- }
- }
- else
- // unknown message
- LOG(3, 0, 0, "Got an unknown netlink message: type %d\n", ack_nh->nlmsg_type);
- }
-
- return 1; // malformed message?!
+ int len = RTA_LENGTH(alen);
+ struct rtattr *rta;
+
+ rta = (struct rtattr *)(((void *)nh) + NLMSG_ALIGN(nh->nlmsg_len));
+ rta->rta_type = type;
+ rta->rta_len = len;
+ memcpy(RTA_DATA(rta), data, alen);
+ nh->nlmsg_len = NLMSG_ALIGN(nh->nlmsg_len) + RTA_ALIGN(len);
}
+// messages corresponding to different phases seq number
+static char *tun_nl_phase_msg[] = {
+ "initialized",
+ "getting tun interface index",
+ "setting tun interface parameters",
+ "setting tun IPv4 address",
+ "setting tun LL IPv6 address",
+ "setting tun global IPv6 address",
+};
+
//
// Set up TUN interface
static void inittun(void)
{
struct ifinfomsg ifinfo;
struct ifreq ifr;
- char buf[4096];
- struct nlmsghdr resp_nh;
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TUN;
LOG(0, 0, 0, "Can't set tun interface: %s\n", strerror(errno));
exit(1);
}
- assert(strlen(ifr.ifr_name) < sizeof(config->tundevice));
- strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice) - 1);
+ assert(strlen(ifr.ifr_name) < sizeof(config->tundevice) - 1);
+ strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice));
{
// get the interface index
- ssize_t len;
struct {
struct nlmsghdr nh;
- struct ifinfomsg ifinfo __attribute__ ((aligned(NLMSG_ALIGNTO)));
- struct rtattr ifname_rta __attribute__ ((aligned(RTA_ALIGNTO)));
- char ifname[IFNAMSIZ];
+ struct ifinfomsg ifinfo;
} 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
- req.ifname_rta.rta_len = RTA_LENGTH(strlen(config->tundevice)+1);
- req.ifname_rta.rta_type = IFLA_IFNAME;
- strncpy(req.ifname, config->tundevice, IFNAMSIZ-1);
+ netlink_addattr(&req.nh, IFLA_IFNAME, config->tundevice, strlen(config->tundevice)+1);
- if(netlink_send(&req.nh, 0) < 0 || (len = netlink_recv(buf, sizeof(buf))) < 0)
+ 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) && resp_nh.nlmsg_type == RTM_GETLINK)
+ if (!NLMSG_OK (resp_nh, len))
{
- memcpy(&ifinfo, NLMSG_DATA(resp_nh), sizeof(ifinfo));
- // got index
- tunidx = ifinfo.ifi_index;
- }
- else
- {
- LOG(0, 0, 0, "Malformed answer getting tun ifindex\n");
+ 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;
}
{
- ssize_t err;
struct {
// interface setting
struct nlmsghdr nh;
- struct ifinfomsg ifinfo __attribute__ ((aligned(NLMSG_ALIGNTO)));
- struct rtattr txqlen_rta __attribute__ ((aligned(RTA_ALIGNTO)));
- uint32_t txqlen;
- struct rtattr mtu_rta __attribute__ ((aligned(RTA_ALIGNTO)));
- uint32_t mtu;
-
- // IPv4 address
- struct nlmsghdr addr_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
- struct ifaddrmsg ifaddr __attribute __ ((aligned(NLMSG_ALIGNTO)));
- struct rtattr addr_rta __attribute __ ((aligned(RTA_ALIGNTO)));
- struct in_addr addr;
-
- // IPv6 LL address
- struct nlmsghdr lladdr6_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
- struct ifaddrmsg llifaddr6 __attribute __ ((aligned(NLMSG_ALIGNTO)));
- struct rtattr lladdr6_rta __attribute __ ((aligned(RTA_ALIGNTO)));
- struct in6_addr lladdr6;
-
- // IPv6 global address
- struct nlmsghdr addr6_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
- struct ifaddrmsg ifaddr6 __attribute __ ((aligned(NLMSG_ALIGNTO)));
- struct rtattr addr6_rta __attribute __ ((aligned(RTA_ALIGNTO)));
- struct in6_addr addr6;
-
- // end header
- struct nlmsghdr end_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
+ union {
+ struct ifinfomsg ifinfo;
+ struct ifaddrmsg ifaddr;
+ } ifmsg;
+ char rtdata[32]; // 32 should be enough
} req;
- char buf[4096];
+ uint32_t txqlen, mtu;
+ struct in_addr ip;
memset(&req, 0, sizeof(req));
- req.nh.nlmsg_type = RTM_NEWLINK;
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_MULTI;
+ req.nh.nlmsg_type = RTM_SETLINK;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_MULTI;
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo));
- req.ifinfo = ifinfo;
- req.ifinfo.ifi_flags |= IFF_UP; // set interface up
- req.ifinfo.ifi_change = IFF_UP; // only change this flag
+ req.ifmsg.ifinfo = ifinfo;
+ req.ifmsg.ifinfo.ifi_flags |= IFF_UP; // set interface up
+ req.ifmsg.ifinfo.ifi_change = IFF_UP; // only change this flag
- req.txqlen_rta.rta_len = RTA_LENGTH(sizeof(req.txqlen));
- req.txqlen_rta.rta_type = IFLA_TXQLEN;
/* Bump up the qlen to deal with bursts from the network */
- req.txqlen = 1000;
-
- req.mtu_rta.rta_len = RTA_LENGTH(sizeof(req.txqlen));
- req.mtu_rta.rta_type = IFLA_MTU;
+ txqlen = 1000;
+ netlink_addattr(&req.nh, IFLA_TXQLEN, &txqlen, sizeof(txqlen));
/* set MTU to modem MRU */
- req.mtu = MRU;
+ mtu = MRU;
+ netlink_addattr(&req.nh, IFLA_MTU, &mtu, sizeof(mtu));
+
+ if (netlink_send(&req.nh) < 0)
+ goto senderror;
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifinfo)
- + req.txqlen_rla.rta_len
- + req.mtu_rta.rta_len);
+ memset(&req, 0, sizeof(req));
- req.addr_nh.nlmsg_type = RTM_NEWADDR;
- req.addr_nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ req.nh.nlmsg_type = RTM_NEWADDR;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
- req.ifaddr.ifa_family = AF_INET;
- req.ifaddr.ifa_prefixlen = 32;
- req.ifaddr.ifa_index = ifinfo.ifi_index;
+ req.ifmsg.ifaddr.ifa_family = AF_INET;
+ req.ifmsg.ifaddr.ifa_prefixlen = 32;
+ req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
- req.addr_rta.rta_len = RTA_LENGTH(sizeof(req.addr));
- req.addr_rta.rta_type = IFA_ADDRESS;
- req.addr.s_addr = config->bind_address ?
- config->bind_address : 0x01010101; // 1.1.1.1
+ if (config->bind_address)
+ ip.s_addr = config->bind_address;
+ else
+ ip.s_addr = 0x01010101, // 1.1.1.1
+ netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip));
- req.addr_nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifaddr)
- + req.addr_rta.rta_len);
+ if (netlink_send(&req.nh) < 0)
+ goto senderror;
// Only setup IPv6 on the tun device if we have a configured prefix
if (config->ipv6_prefix.s6_addr[0]) {
- req.lladdr6_nh.nlmsg_type = RTM_NEWADDR;
- req.lladdr6_nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ struct in6_addr ip6;
- req.llifaddr6.ifa_family = AF_INET6;
- req.llifaddr6.ifa_prefixlen = 64;
- req.llifaddr6.ifa_scope = RT_SCOPE_LINK;
- req.llifaddr6.ifa_index = ifinfo.ifi_index;
+ 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_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.lladdr6_rta.rta_len = RTA_LENGTH(sizeof(req.lladdr6));
- req.lladdr6_rta.rta_type = IFA_LOCAL;
// Link local address is FE80::1
- memset(&req.lladdr6, 0, sizeof(req.lladdr6));
- req.lladdr6.s6_addr[0] = 0xFE;
- req.lladdr6.s6_addr[1] = 0x80;
- req.lladdr6.s6_addr[15] = 1;
+ memset(&ip6, 0, sizeof(ip6));
+ ip6.s6_addr[0] = 0xFE;
+ ip6.s6_addr[1] = 0x80;
+ ip6.s6_addr[15] = 1;
+ netlink_addattr(&req.nh, IFA_LOCAL, &ip6, sizeof(ip6));
- req.lladdr6_nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifaddr)
- + req.lladdr6_rta.rta_len);
+ if (netlink_send(&req.nh) < 0)
+ goto senderror;
- req.addr6_nh.nlmsg_type = RTM_NEWADDR;
- req.addr6_nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ memset(&req, 0, sizeof(req));
- req.ifaddr6.ifa_family = AF_INET6;
- req.ifaddr6.ifa_prefixlen = 64;
- req.ifaddr6.ifa_scope = RT_SCOPE_UNIVERSE;
- req.ifaddr6.ifa_index = ifinfo.ifi_index;
+ req.nh.nlmsg_type = RTM_NEWADDR;
+ req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
- req.addr6_rta.rta_len = RTA_LENGTH(sizeof(req.addr6));
- req.addr6_rta.rta_type = IFA_LOCAL;
- // Global address is prefix::1
- req.addr6 = config->ipv6_prefix;
- req.addr6.s6_addr[15] = 1;
+ 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.lladdr6_nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifaddr)
- + req.lladdr6_rta.rta_len);
+ // Global address is prefix::1
+ ip6 = config->ipv6_prefix;
+ ip6.s6_addr[15] = 1;
+ netlink_addattr(&req.nh, IFA_LOCAL, &ip6, sizeof(ip6));
- req.end_nh.nlmsg_type = NLMSG_DONE;
- req.end_nh.nlmsg_len = NLMSG_LENGTH(0);
- }
- else
- {
- // we terminate at the beginning of IPv6 stuff
- req.lladdr6_nh.nlmsg_type = NLMSG_DONE;
- req.lladdr6_nh.nlmsg_len = NLMSG_LENGTH(0);
+ if (netlink_send(&req.nh) < 0)
+ goto senderror;
}
- if (netlink_send(&req.nh, 1) < 0)
- LOG(0, 0, 0, "Error setting up tun device: %s\n", strerror(errno));
- exit(1);
- }
+ memset(&req, 0, sizeof(req));
- if (netlink_recv(buf, sizeof(buf)) < 0)
- {
- LOG(0, 0, 0, "Error waiting ack for setting up tun device: %s\n", strerror(errno));
- exit(1);
- }
+ req.nh.nlmsg_type = NLMSG_DONE;
+ req.nh.nlmsg_len = NLMSG_LENGTH(0);
- resp_nh = (struct nlmsghdr *)buf;
- if ((err = netlink_check_ack(resp_nh, 4)))
- {
- if (err < 0)
- LOG(0, 0, 0, "Error while receiving tun device ack: %s\n", strerror(errno));
- else
- LOG(0, 0, 0, "Error while receiving tun device ack\n", strerror(errno));
- exit(1);
- }
+ if (netlink_send(&req.nh) < 0)
+ goto senderror;
+
+ // if we get an error for seqnum < min_initok_nlseqnum,
+ // we must exit as initialization went wrong
+ if (config->ipv6_prefix.s6_addr[0])
+ min_initok_nlseqnum = 5 + 1; // idx + if + addr + 2*addr6
+ else
+ min_initok_nlseqnum = 3 + 1; // idx + if + addr
}
+
+ return;
+
+senderror:
+ LOG(0, 0, 0, "Error while setting up tun device: %s\n", strerror(errno));
+ exit(1);
}
// set up UDP ports
int routed = 0;
for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
{
- if ((session[s].ip & session[s].route[r].mask) ==
- (session[s].route[r].ip & session[s].route[r].mask))
+ if ((session[s].ip >> (32-session[s].route[r].prefixlen)) ==
+ (session[s].route[r].ip >> (32-session[s].route[r].prefixlen)))
routed++;
- if (del_routes) routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 0);
+ if (del_routes) routeset(s, session[s].route[r].ip, session[s].route[r].prefixlen, 0, 0);
session[s].route[r].ip = 0;
}
# include "fake_epoll.h"
#endif
-// the base set of fds polled: cli, cluster, tun, udp, control, dae
-#define BASE_FDS 6
+// the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink
+#define BASE_FDS 7
// additional polled fds
#ifdef BGP
exit(1);
}
- LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d\n",
- clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd);
+ LOG(4, 0, 0, "Beginning of main loop. clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d\n",
+ clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd);
/* setup our fds to poll for input */
{
d[i].type = FD_TYPE_DAE;
e.data.ptr = &d[i++];
epoll_ctl(epollfd, EPOLL_CTL_ADD, daefd, &e);
+
+ d[i].type = FD_TYPE_NETLINK;
+ e.data.ptr = &d[i++];
+ epoll_ctl(epollfd, EPOLL_CTL_ADD, nlfd, &e);
}
#ifdef BGP
break;
#endif /* BGP */
+ case FD_TYPE_NETLINK:
+ {
+ struct nlmsghdr *nh = (struct nlmsghdr *)buf;
+ s = netlink_recv(buf, sizeof(buf));
+ if (nh->nlmsg_type == NLMSG_ERROR)
+ {
+ struct nlmsgerr *errmsg = NLMSG_DATA(nh);
+ if (errmsg->error)
+ {
+ if (errmsg->msg.nlmsg_seq < min_initok_nlseqnum)
+ {
+ LOG(0, 0, 0, "Got a fatal netlink error (while %s): %s\n", tun_nl_phase_msg[nh->nlmsg_seq], strerror(-errmsg->error));
+ exit(1);
+ }
+ else
+
+ LOG(0, 0, 0, "Got a netlink error: %s\n", strerror(-errmsg->error));
+ }
+ // else it's a ack
+ }
+ else
+ LOG(1, 0, 0, "Got a unknown netlink message: type %d seq %d flags %d\n", nh->nlmsg_type, nh->nlmsg_seq, nh->nlmsg_flags);
+ n--;
+ break;
+ }
+
default:
LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type);
}
//
// Add a block of addresses to the IP pool to hand out.
//
-static void add_to_ip_pool(in_addr_t addr, in_addr_t mask)
+static void add_to_ip_pool(in_addr_t addr, int prefixlen)
{
int i;
- if (mask == 0)
- mask = 0xffffffff; // Host route only.
+ if (prefixlen == 0)
+ prefixlen = 32; // Host route only.
- addr &= mask;
+ addr &= 0xffffffff << (32 - prefixlen);
if (ip_pool_size >= MAXIPPOOL) // Pool is full!
return ;
- for (i = addr ;(i & mask) == addr; ++i)
+ for (i = addr ; i < addr+(1<<(32-prefixlen)); ++i)
{
if ((i & 0xff) == 0 || (i&0xff) == 255)
continue; // Skip 0 and broadcast addresses.
{
// It's a range
int numbits = 0;
- in_addr_t start = 0, mask = 0;
+ in_addr_t start = 0;
LOG(2, 0, 0, "Adding IP address range %s\n", buf);
*p++ = 0;
continue;
}
start = ntohl(inet_addr(pool));
- mask = (in_addr_t) (pow(2, numbits) - 1) << (32 - numbits);
// Add a static route for this pool
- LOG(5, 0, 0, "Adding route for address pool %s/%u\n",
- fmtaddr(htonl(start), 0), 32 + mask);
+ LOG(5, 0, 0, "Adding route for address pool %s/%d\n",
+ fmtaddr(htonl(start), 0), numbits);
- routeset(0, start, mask, 0, 1);
+ routeset(0, start, numbits, 0, 1);
- add_to_ip_pool(start, mask);
+ add_to_ip_pool(start, numbits);
}
else
{
}
}
+ initnetlink();
+
/* Set up the cluster communications port. */
if (cluster_init() < 0)
exit(1);
// Add the route for this session.
for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
{
- if ((session[s].ip & session[s].route[r].mask) ==
- (session[s].route[r].ip & session[s].route[r].mask))
+ if ((session[s].ip >> (32-session[s].route[r].prefixlen)) ==
+ (session[s].route[r].ip >> (32-session[s].route[r].prefixlen)))
routed++;
- routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 1);
+ routeset(s, session[s].route[r].ip, session[s].route[r].prefixlen, 0, 1);
}
// Static IPs need to be routed if not already
for (i = 0; !newip && i < MAXROUTE && (session[s].route[i].ip || new->route[i].ip); i++)
if (new->route[i].ip != session[s].route[i].ip ||
- new->route[i].mask != session[s].route[i].mask)
+ new->route[i].prefixlen != session[s].route[i].prefixlen)
newip++;
// needs update
// remove old routes...
for (i = 0; i < MAXROUTE && session[s].route[i].ip; i++)
{
- if ((session[s].ip & session[s].route[i].mask) ==
- (session[s].route[i].ip & session[s].route[i].mask))
+ if ((session[s].ip >> (32-session[s].route[i].prefixlen)) ==
+ (session[s].route[i].ip >> (32-session[s].route[i].prefixlen)))
routed++;
- routeset(s, session[s].route[i].ip, session[s].route[i].mask, 0, 0);
+ routeset(s, session[s].route[i].ip, session[s].route[i].prefixlen, 0, 0);
}
// ...ip
// add new routes...
for (i = 0; i < MAXROUTE && new->route[i].ip; i++)
{
- if ((new->ip & new->route[i].mask) ==
- (new->route[i].ip & new->route[i].mask))
+ if ((new->ip >> (32-new->route[i].prefixlen)) ==
+ (new->route[i].ip >> (32-new->route[i].prefixlen)))
routed++;
- routeset(s, new->route[i].ip, new->route[i].mask, 0, 1);
+ routeset(s, new->route[i].ip, new->route[i].prefixlen, 0, 1);
}
// ...ip
projects / l2tpns.git / blobdiff