// Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
// vim: sw=8 ts=8
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp $";
-
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#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>
int cluster_sockfd = -1; // Intra-cluster communications socket.
int epollfd = -1; // event polling
time_t basetime = 0; // base clock
-char hostname[1000] = ""; // us.
+char hostname[MAXHOSTNAME] = ""; // 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
CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
+ CONFIG("cli_bind_address", cli_bind_address, IPv4),
+ CONFIG("hostname", hostname, STRING),
+ CONFIG("nexthop_address", nexthop_address, IPv4),
+ CONFIG("nexthop6_address", nexthop6_address, IPv6),
{ NULL, 0, 0, 0 },
};
NULL,
"plugin_pre_auth",
"plugin_post_auth",
- "plugin_packet_rx",
- "plugin_packet_tx",
"plugin_timer",
"plugin_new_session",
"plugin_kill_session",
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 (!prefixlen) prefixlen = 32;
+
+ ip &= 0xffffffff << (32 - prefixlen);; // Force the ip to be the first one in the route.
+
+ 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;
+ }
- if (!mask) mask = 0xffffffff;
+ req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
- ip &= mask; // Force the ip to be the first one in the route.
+ req.rt.rtm_family = AF_INET;
+ req.rt.rtm_dst_len = prefixlen;
+ req.rt.rtm_table = RT_TABLE_MAIN;
+ req.rt.rtm_protocol = 42;
+ req.rt.rtm_scope = RT_SCOPE_LINK;
+ req.rt.rtm_type = RTN_UNICAST;
- 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);
+ 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, session[s].tunnel, "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));
- 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;
+ 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 = 42;
+ req.rt.rtm_scope = RT_SCOPE_LINK;
+ req.rt.rtm_type = RTN_UNICAST;
+
+ 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",
+ LOG(1, s, session[s].tunnel, "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)
+#ifdef BGP
+ if (add)
+ bgp_add_route6(ip, prefixlen);
+ else
+ bgp_del_route6(ip, prefixlen);
+#endif /* BGP */
if (s)
{
return recvmsg(nlfd, &msg, 0);
}
+/* adapted from iproute2 */
+static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen)
+{
+ 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",
// Set up TUN interface
static void inittun(void)
{
- struct ifinfomsg ifinfo;
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
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));
+ 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.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);
-
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifinfo)
- + req.ifname_rta.rta_len);
-
- 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;
- struct {
- struct rtattr rta;
- uint32_t u32 __attribute__ ((aligned(RTA_ALIGNTO)));;
- } u32_attr;
- struct {
- struct rtattr rta;
- struct in_addr addr __attribute__ ((aligned(RTA_ALIGNTO)));;
- } ipv4_attr;
- struct {
- struct rtattr rta;
- struct in6_addr addr6 __attribute__ ((aligned(RTA_ALIGNTO)));;
- } ipv6_attr;
- char *buf_ptr;
+ uint32_t txqlen, mtu;
+ 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
- buf_ptr = NLMSG_DATA(&req.nh) + sizeof(req.ifmsg.ifinfo);
-
- u32_attr.rta.rta_len = RTA_LENGTH(sizeof(u32_attr.u32));
- u32_attr.rta.rta_type = IFLA_TXQLEN;
/* Bump up the qlen to deal with bursts from the network */
- u32_attr.u32 = 1000;
- memcpy(buf_ptr, &u32_attr, sizeof(u32_attr));
-
- buf_ptr += RTA_ALIGN(u32_attr.rta.rta_len);
-
- u32_attr.rta.rta_len = RTA_LENGTH(sizeof(u32_attr.u32));
- u32_attr.rta.rta_type = IFLA_MTU;
+ txqlen = 1000;
+ netlink_addattr(&req.nh, IFLA_TXQLEN, &txqlen, sizeof(txqlen));
/* set MTU to modem MRU */
- u32_attr.u32 = MRU;
- memcpy(buf_ptr, &u32_attr, sizeof(u32_attr));
-
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo)
- + u32_attr.rta.rta_len * 2);
+ mtu = MRU;
+ netlink_addattr(&req.nh, IFLA_MTU, &mtu, sizeof(mtu));
if (netlink_send(&req.nh) < 0)
- {
- LOG(0, 0, 0, "Error setting up tun device interface: %s\n", strerror(errno));
- exit(1);
- }
+ goto senderror;
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;
-
- ipv4_attr.rta.rta_len = RTA_LENGTH(sizeof(ipv4_attr.addr));
- ipv4_attr.rta.rta_type = IFA_LOCAL;
- ipv4_attr.addr.s_addr = config->bind_address ?
- config->bind_address : 0x01010101; // 1.1.1.1
- memcpy(NLMSG_DATA(&req.nh) + sizeof(req.ifmsg.ifaddr), &ipv4_attr, sizeof(ipv4_attr));
+ req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
+ req.ifmsg.ifaddr.ifa_index = tunidx;
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)
- + ipv4_attr.rta.rta_len);
+ if (config->bind_address)
+ ip = config->bind_address;
+ else
+ ip = 0x01010101; // 1.1.1.1
+ netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip));
if (netlink_send(&req.nh) < 0)
- {
- LOG(0, 0, 0, "Error setting up tun device IPv4 address: %s\n", strerror(errno));
- exit(1);
- }
+ goto senderror;
// Only setup IPv6 on the tun device if we have a configured prefix
if (config->ipv6_prefix.s6_addr[0]) {
+ struct in6_addr 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_LINK;
- req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
+ req.ifmsg.ifaddr.ifa_index = tunidx;
- ipv6_attr.rta.rta_len = RTA_LENGTH(sizeof(ipv6_attr.addr6));
- ipv6_attr.rta.rta_type = IFA_LOCAL;
// Link local address is FE80::1
- memset(&ipv6_attr.addr6, 0, sizeof(ipv6_attr.addr6));
- ipv6_attr.addr6.s6_addr[0] = 0xFE;
- ipv6_attr.addr6.s6_addr[1] = 0x80;
- ipv6_attr.addr6.s6_addr[15] = 1;
- memcpy(NLMSG_DATA(&req.nh) + sizeof(req.ifmsg.ifaddr), &ipv6_attr, sizeof(ipv6_attr));
-
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)
- + ipv6_attr.rta.rta_len);
+ 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));
if (netlink_send(&req.nh) < 0)
- {
- LOG(0, 0, 0, "Error setting up tun device IPv6 LL address: %s\n", strerror(errno));
- exit(1);
- }
+ goto senderror;
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;
- ipv6_attr.rta.rta_len = RTA_LENGTH(sizeof(ipv6_attr.addr6));
- ipv6_attr.rta.rta_type = IFA_LOCAL;
// Global address is prefix::1
- ipv6_attr.addr6 = config->ipv6_prefix;
- ipv6_attr.addr6.s6_addr[15] = 1;
- memcpy(NLMSG_DATA(&req.nh) + sizeof(req.ifmsg.ifaddr), &ipv6_attr, sizeof(ipv6_attr));
-
- req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)
- + ipv6_attr.rta.rta_len);
+ ip6 = config->ipv6_prefix;
+ ip6.s6_addr[15] = 1;
+ netlink_addattr(&req.nh, IFA_LOCAL, &ip6, sizeof(ip6));
if (netlink_send(&req.nh) < 0)
- {
- LOG(0, 0, 0, "Error setting up tun device IPv6 global address: %s\n", strerror(errno));
- exit(1);
- }
+ goto senderror;
}
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(0);
if (netlink_send(&req.nh) < 0)
- {
- LOG(0, 0, 0, "Error finishing setting up tun device: %s\n", strerror(errno));
- exit(1);
- }
+ goto senderror;
// if we get an error for seqnum < min_initok_nlseqnum,
// we must exit as initialization went wrong
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
return;
}
- // Add on L2TP header
- {
- bundleidt bid = 0;
- if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1)
- {
- bid = session[s].bundle;
- s = bundle[bid].members[bundle[bid].current_ses = ++bundle[bid].current_ses % bundle[bid].num_of_links];
- t = session[s].tunnel;
- sp = &session[s];
- LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s);
- if(len > MINFRAGLEN)
- {
- // Partition the packet to "bundle[b].num_of_links" fragments
- bundlet *b = &bundle[bid];
- uint32_t num_of_links = b->num_of_links;
- uint32_t fraglen = len / num_of_links;
- fraglen = (fraglen > session[s].mru ? session[s].mru : fraglen);
- uint32_t last_fraglen = fraglen + len % num_of_links;
- last_fraglen = (last_fraglen > session[s].mru ? len % num_of_links : last_fraglen);
- uint32_t remain = len;
-
- // send the first packet
- uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, fraglen, s, t, PPPIP, 0, bid, MP_BEGIN);
- if (!p) return;
- tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
- // statistics
- update_session_out_stat(s, sp, fraglen);
- remain -= fraglen;
- while (remain > last_fraglen)
- {
- s = b->members[b->current_ses = ++b->current_ses % num_of_links];
- t = session[s].tunnel;
- sp = &session[s];
- LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
- p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), fraglen, s, t, PPPIP, 0, bid, 0);
- if (!p) return;
- tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
- update_session_out_stat(s, sp, fraglen);
- remain -= fraglen;
- }
- // send the last fragment
- s = b->members[b->current_ses = ++b->current_ses % num_of_links];
+ if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1)
+ {
+ // Add on L2TP header
+ bundleidt bid = session[s].bundle;
+ bundlet *b = &bundle[bid];
+
+ b->current_ses = (b->current_ses + 1) % b->num_of_links;
+ s = b->members[b->current_ses];
+ t = session[s].tunnel;
+ sp = &session[s];
+ LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s);
+ if(len > MINFRAGLEN)
+ {
+ // Partition the packet to "bundle[b].num_of_links" fragments
+ uint32_t num_of_links = b->num_of_links;
+ uint32_t fraglen = len / num_of_links;
+ fraglen = (fraglen > session[s].mru ? session[s].mru : fraglen);
+ uint32_t last_fraglen = fraglen + len % num_of_links;
+ last_fraglen = (last_fraglen > session[s].mru ? len % num_of_links : last_fraglen);
+ uint32_t remain = len;
+
+ // send the first packet
+ uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, fraglen, s, t, PPPIP, 0, bid, MP_BEGIN);
+ if (!p) return;
+ tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
+ // statistics
+ update_session_out_stat(s, sp, fraglen);
+ remain -= fraglen;
+ while (remain > last_fraglen)
+ {
+ b->current_ses = (b->current_ses + 1) % num_of_links;
+ s = b->members[b->current_ses];
t = session[s].tunnel;
sp = &session[s];
- LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
- p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), remain, s, t, PPPIP, 0, bid, MP_END);
- if (!p) return;
- tunnelsend(fragbuf, remain + (p-fragbuf), t); // send it...
- update_session_out_stat(s, sp, remain);
- if (remain != last_fraglen)
- LOG(3, s, t, "PROCESSIPOUT ERROR REMAIN != LAST_FRAGLEN, %d != %d\n", remain, last_fraglen);
- }
- else {
- // Send it as one frame
- uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, bid, MP_BOTH_BITS);
- if (!p) return;
- tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
- LOG(4, s, t, "MPPP: packet sent as one frame\n");
- update_session_out_stat(s, sp, len);
- }
- }
- else
- {
- uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
- if (!p) return;
- tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+ LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
+ p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), fraglen, s, t, PPPIP, 0, bid, 0);
+ if (!p) return;
+ tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
+ update_session_out_stat(s, sp, fraglen);
+ remain -= fraglen;
+ }
+ // send the last fragment
+ b->current_ses = (b->current_ses + 1) % num_of_links;
+ s = b->members[b->current_ses];
+ t = session[s].tunnel;
+ sp = &session[s];
+ LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
+ p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), remain, s, t, PPPIP, 0, bid, MP_END);
+ if (!p) return;
+ tunnelsend(fragbuf, remain + (p-fragbuf), t); // send it...
+ update_session_out_stat(s, sp, remain);
+ if (remain != last_fraglen)
+ LOG(3, s, t, "PROCESSIPOUT ERROR REMAIN != LAST_FRAGLEN, %d != %d\n", remain, last_fraglen);
+ }
+ else {
+ // Send it as one frame
+ uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, bid, MP_BOTH_BITS);
+ if (!p) return;
+ tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+ LOG(4, s, t, "MPPP: packet sent as one frame\n");
update_session_out_stat(s, sp, len);
- }
- }
+ }
+ }
+ else
+ {
+ uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
+ if (!p) return;
+ tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+ update_session_out_stat(s, sp, len);
+ }
// Snooping this session, send it to intercept box
if (sp->snoop_ip && sp->snoop_port)
if (session[s].bundle && bundle[session[s].bundle].num_of_links > 1)
{
bundleidt bid = session[s].bundle;
- s = bundle[bid].members[bundle[bid].current_ses = ++bundle[bid].current_ses % bundle[bid].num_of_links];
+ bundlet *b = &bundle[bid];
+
+ b->current_ses = (b->current_ses + 1) % b->num_of_links;
+ s = b->members[b->current_ses];
LOG(3, s, session[s].tunnel, "MPPP: Session number becomes: %u\n", s);
}
t = session[s].tunnel;
{
sessiont *sp;
tunnelidt t;
- in_addr_t ip;
uint8_t b[MAXETHER + 20];
buf += 4;
len -= 4;
- ip = *(in_addr_t *)(buf + 16);
-
if (!session[s].ip)
return;
static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
{
uint16_t l = (m ? 0x8008 : 0x0008);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- *(uint16_t *) (c->buf + c->length + 6) = htons(val);
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ c->buf16[c->length/2 + 3] = htons(val);
c->length += 8;
}
static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
{
uint16_t l = (m ? 0x800A : 0x000A);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- *(uint32_t *) (c->buf + c->length + 6) = htonl(val);
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ *(uint32_t *) &c->buf[c->length + 6] = htonl(val);
c->length += 10;
}
static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
{
uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- memcpy(c->buf + c->length + 6, val, strlen(val));
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ memcpy(&c->buf[c->length + 6], val, strlen(val));
c->length += 6 + strlen(val);
}
static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m)
{
uint16_t l = ((m ? 0x8000 : 0) + len + 6);
- *(uint16_t *) (c->buf + c->length + 0) = htons(l);
- *(uint16_t *) (c->buf + c->length + 2) = htons(0);
- *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
- memcpy(c->buf + c->length + 6, val, len);
+ c->buf16[c->length/2 + 0] = htons(l);
+ c->buf16[c->length/2 + 1] = htons(0);
+ c->buf16[c->length/2 + 2] = htons(avp);
+ memcpy(&c->buf[c->length + 6], val, len);
c->length += 6 + len;
}
}
assert(c);
c->next = 0;
- *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver
+ c->buf16[0] = htons(0xC802); // flags/ver
c->length = 12;
control16(c, 0, mtype, 1);
return c;
// (ZLB send).
static void controlnull(tunnelidt t)
{
- uint8_t buf[12];
+ uint16_t buf[6];
if (tunnel[t].controlc) // Messages queued; They will carry the ack.
return;
- *(uint16_t *) (buf + 0) = htons(0xC802); // flags/ver
- *(uint16_t *) (buf + 2) = htons(12); // length
- *(uint16_t *) (buf + 4) = htons(tunnel[t].far); // tunnel
- *(uint16_t *) (buf + 6) = htons(0); // session
- *(uint16_t *) (buf + 8) = htons(tunnel[t].ns); // sequence
- *(uint16_t *) (buf + 10) = htons(tunnel[t].nr); // sequence
- tunnelsend(buf, 12, t);
+ buf[0] = htons(0xC802); // flags/ver
+ buf[1] = htons(12); // length
+ buf[2] = htons(tunnel[t].far); // tunnel
+ buf[3] = htons(0); // session
+ buf[4] = htons(tunnel[t].ns); // sequence
+ buf[5] = htons(tunnel[t].nr); // sequence
+ tunnelsend((uint8_t *)buf, 12, t);
}
// add a control message to a tunnel, and send if within window
static void controladd(controlt *c, sessionidt far, tunnelidt t)
{
- *(uint16_t *) (c->buf + 2) = htons(c->length); // length
- *(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
- *(uint16_t *) (c->buf + 6) = htons(far); // session
- *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
+ c->buf16[1] = htons(c->length); // length
+ c->buf16[2] = htons(tunnel[t].far); // tunnel
+ c->buf16[3] = htons(far); // session
+ c->buf16[4] = htons(tunnel[t].ns); // sequence
tunnel[t].ns++; // advance sequence
// link in message in to queue
if (tunnel[t].controlc)
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;
}
{
// This session was part of a bundle
bundle[b].num_of_links--;
- LOG(3, s, 0, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
+ LOG(3, s, session[s].tunnel, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
if(bundle[b].num_of_links == 0)
{
bundleclear(b);
- LOG(3, s, 0, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
+ LOG(3, s, session[s].tunnel, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
}
else
{
break;
}
bundle[b].members[mem_num] = bundle[b].members[bundle[b].num_of_links];
- LOG(3, s, 0, "MPPP: Adjusted member links array\n");
+ LOG(3, s, session[s].tunnel, "MPPP: Adjusted member links array\n");
}
}
cluster_send_bundle(b);
controlt *c = controlnew(14); // sending CDN
if (cdn_error)
{
- uint8_t buf[4];
- *(uint16_t *) buf = htons(cdn_result);
- *(uint16_t *) (buf+2) = htons(cdn_error);
- controlb(c, 1, buf, 4, 1);
+ uint16_t buf[2];
+ buf[0] = htons(cdn_result);
+ buf[1] = htons(cdn_error);
+ controlb(c, 1, (uint8_t *)buf, 4, 1);
}
else
control16(c, 1, cdn_result, 1);
controlt *c = controlnew(4); // sending StopCCN
if (error)
{
- uint8_t buf[64];
+ uint16_t buf[32];
int l = 4;
- *(uint16_t *) buf = htons(result);
- *(uint16_t *) (buf+2) = htons(error);
+ buf[0] = htons(result);
+ buf[1] = htons(error);
if (msg)
{
int m = strlen(msg);
if (m + 4 > sizeof(buf))
m = sizeof(buf) - 4;
- memcpy(buf+4, msg, m);
+ memcpy(buf+2, msg, m);
l += m;
}
- controlb(c, 1, buf, l, 1);
+ controlb(c, 1, (uint8_t *)buf, l, 1);
}
else
control16(c, 1, result, 1);
// Set multilink options before sending initial LCP packet
sess_local[s].mp_mrru = 1614;
- sess_local[s].mp_epdis = config->bind_address ? config->bind_address : my_address;
+ sess_local[s].mp_epdis = ntohl(config->bind_address ? config->bind_address : my_address);
sendlcp(s, t);
change_state(s, lcp, RequestSent);
static clockt last_talked = 0;
static clockt start_busy_wait = 0;
- if (!config->cluster_iam_master)
- {
#ifdef BGP
- static time_t stopped_bgp = 0;
- if (bgp_configured)
+ static time_t stopped_bgp = 0;
+ if (bgp_configured)
+ {
+ if (!stopped_bgp)
{
- if (!stopped_bgp)
- {
- LOG(1, 0, 0, "Shutting down in %d seconds, stopping BGP...\n", QUIT_DELAY);
+ LOG(1, 0, 0, "Shutting down in %d seconds, stopping BGP...\n", QUIT_DELAY);
- for (i = 0; i < BGP_NUM_PEERS; i++)
- if (bgp_peers[i].state == Established)
- bgp_stop(&bgp_peers[i]);
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ if (bgp_peers[i].state == Established)
+ bgp_stop(&bgp_peers[i]);
- stopped_bgp = time_now;
+ stopped_bgp = time_now;
+ if (!config->cluster_iam_master)
+ {
// we don't want to become master
cluster_send_ping(0);
return 1;
}
-
- if (time_now < (stopped_bgp + QUIT_DELAY))
- return 1;
}
+
+ if (!config->cluster_iam_master && time_now < (stopped_bgp + QUIT_DELAY))
+ return 1;
+ }
#endif /* BGP */
+ if (!config->cluster_iam_master)
return 0;
- }
if (main_quit == QUIT_SHUTDOWN)
{
if (config->neighbour[i].name[0])
bgp_start(&bgp_peers[i], config->neighbour[i].name,
config->neighbour[i].as, config->neighbour[i].keepalive,
- config->neighbour[i].hold, 0); /* 0 = routing disabled */
+ config->neighbour[i].hold, config->neighbour[i].update_source,
+ 0); /* 0 = routing disabled */
}
#endif /* BGP */
more++;
}
}
+#ifdef BGP
+ else
+ /* no event received, but timers could still have expired */
+ bgp_process_peers_timers();
+#endif /* BGP */
if (time_changed)
{
//
// 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
{
initplugins();
initdata(optdebug, optconfig);
- init_cli(hostname);
+ init_cli();
read_config_file();
+ /* set hostname /after/ having read the config file */
+ if (*config->hostname)
+ strcpy(hostname, config->hostname);
+ cli_init_complete(hostname);
update_config();
init_tbf(config->num_tbfs);
// 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