// L2TP Network Server
// Adrian Kennard 2002
-// Copyright (c) 2003, 2004 Optus Internet Engineering
+// Copyright (c) 2003, 2004, 2005 Optus Internet Engineering
// 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 1.63 2004/12/09 00:50:45 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.73.2.16 2005/06/01 01:10:15 bodea Exp $";
#include <arpa/inet.h>
#include <assert.h>
int ifrfd = -1; // File descriptor for routing, etc
time_t basetime = 0; // base clock
char hostname[1000] = ""; // us.
-static u32 sessionid = 0; // session id for radius accounting
+static uint32_t sessionid = 0; // session id for radius accounting
static int syslog_log = 0; // are we logging to syslog
static FILE *log_stream = NULL; // file handle for direct logging (i.e. direct into file, not via syslog).
extern int cluster_sockfd; // Intra-cluster communications socket.
-u32 last_id = 0; // Last used PPP SID. Can I kill this?? -- mo
+uint32_t last_id = 0; // Last used PPP SID. Can I kill this?? -- mo
struct cli_session_actions *cli_session_actions = NULL; // Pending session changes requested by CLI
struct cli_tunnel_actions *cli_tunnel_actions = NULL; // Pending tunnel changes required by CLI
static void *ip_hash[256]; // Mapping from IP address to session structures.
// Traffic counters.
-static u32 udp_rx = 0, udp_rx_pkt = 0, udp_tx = 0;
-static u32 eth_rx = 0, eth_rx_pkt = 0;
-u32 eth_tx = 0;
+static uint32_t udp_rx = 0, udp_rx_pkt = 0, udp_tx = 0;
+static uint32_t eth_rx = 0, eth_rx_pkt = 0;
+uint32_t eth_tx = 0;
-static u32 ip_pool_size = 1; // Size of the pool of addresses used for dynamic address allocation.
+static uint32_t ip_pool_size = 1; // Size of the pool of addresses used for dynamic address allocation.
time_t time_now = 0; // Current time in seconds since epoch.
static char time_now_string[64] = {0}; // Current time as a string.
-static char main_quit = 0; // True if we're in the process of exiting.
+char main_quit = 0; // True if we're in the process of exiting.
linked_list *loaded_plugins;
linked_list *plugins[MAX_PLUGIN_TYPES];
CONFIG("accounting_dir", accounting_dir, STRING),
CONFIG("setuid", target_uid, INT),
CONFIG("dump_speed", dump_speed, BOOL),
- CONFIG("cleanup_interval", cleanup_interval, INT),
CONFIG("multi_read_count", multi_read_count, INT),
CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
CONFIG("lock_pages", lock_pages, BOOL),
CONFIG("icmp_rate", icmp_rate, INT),
+ CONFIG("packet_limit", max_packets, INT),
CONFIG("cluster_address", cluster_address, IP),
CONFIG("cluster_interface", cluster_interface, STRING),
CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
+ CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
{ NULL, 0, 0, 0 },
};
#define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
+// Counters for shutdown sessions
+static sessiont shut_acct[8192];
+static sessionidt shut_acct_n = 0;
+
tunnelt *tunnel = NULL; // Array of tunnel structures.
sessiont *session = NULL; // Array of session structures.
-sessioncountt *sess_count = NULL; // Array of partial per-session traffic counters.
+sessionlocalt *sess_local = NULL; // Array of local per-session counters.
radiust *radius = NULL; // Array of radius structures.
ippoolt *ip_address_pool = NULL; // Array of dynamic IP addresses.
ip_filtert *ip_filters = NULL; // Array of named filters.
struct Tringbuffer *ringbuffer = NULL;
#endif
-static void cache_ipmap(ipt ip, int s);
-static void uncache_ipmap(ipt ip);
+static void cache_ipmap(in_addr_t ip, int s);
+static void uncache_ipmap(in_addr_t ip);
static void free_ip_address(sessionidt s);
-static void dump_acct_info(void);
+static void dump_acct_info(int all);
static void sighup_handler(int sig);
static void sigalrm_handler(int sig);
static void sigterm_handler(int sig);
static void sigchild_handler(int sig);
static void read_state(void);
static void dump_state(void);
-static void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response);
+static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response);
static void update_config(void);
static void read_config_file(void);
static void initplugins(void);
static int add_plugin(char *plugin_name);
static int remove_plugin(char *plugin_name);
static void plugins_done(void);
-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen);
+static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen);
static tunnelidt new_tunnel(void);
-static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length);
+static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length);
+
+// on slaves, alow BGP to withdraw cleanly before exiting
+#define QUIT_DELAY 5
-// return internal time (10ths since process startup)
-static clockt now(void)
+// return internal time (10ths since process startup), set f if given
+static clockt now(double *f)
{
struct timeval t;
gettimeofday(&t, 0);
+ if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;
return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
}
// work out a retry time based on try number
// This is a straight bounded exponential backoff.
// Maximum re-try time is 32 seconds. (2^5).
-clockt backoff(u8 try)
+clockt backoff(uint8_t try)
{
if (try > 5) try = 5; // max backoff
- return now() + 10 * (1 << try);
+ return now(NULL) + 10 * (1 << try);
}
void _log_hex(int level, const char *title, const char *data, int maxsize)
{
int i, j;
- const u8 *d = (const u8 *)data;
+ const uint8_t *d = (const uint8_t *) data;
if (config->debug < level) return;
//
// 'ip' and 'mask' must be in _host_ order.
//
-static void routeset(sessionidt s, ipt ip, ipt mask, ipt gw, u8 add)
+static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, int add)
{
struct rtentry r;
int i;
memset(&r, 0, sizeof(r));
r.rt_dev = config->tundevice;
r.rt_dst.sa_family = AF_INET;
- *(u32 *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);
+ *(uint32_t *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);
r.rt_gateway.sa_family = AF_INET;
- *(u32 *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw);
+ *(uint32_t *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw);
r.rt_genmask.sa_family = AF_INET;
- *(u32 *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask);
+ *(uint32_t *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask);
r.rt_flags = (RTF_UP | RTF_STATIC);
if (gw)
r.rt_flags |= RTF_GATEWAY;
// IP address.
//
-static int lookup_ipmap(ipt ip)
+static int lookup_ipmap(in_addr_t ip)
{
- u8 *a = (u8 *)&ip;
- char **d = (char **) ip_hash;
- int s;
+ uint8_t *a = (uint8_t *) &ip;
+ uint8_t **d = (uint8_t **) ip_hash;
- if (!(d = (char **) d[(size_t) *a++])) return 0;
- if (!(d = (char **) d[(size_t) *a++])) return 0;
- if (!(d = (char **) d[(size_t) *a++])) return 0;
+ if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+ if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+ if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
- s = (ipt) d[(size_t) *a];
- return s;
+ return (int) (intptr_t) d[(size_t) *a];
}
-sessionidt sessionbyip(ipt ip)
+sessionidt sessionbyip(in_addr_t ip)
{
int s = lookup_ipmap(ip);
CSTAT(call_sessionbyip);
- if (s > 0 && s < MAXSESSION && session[s].tunnel)
- return s;
+ if (s > 0 && s < MAXSESSION && session[s].opened)
+ return (sessionidt) s;
+
return 0;
}
//
// (It's actually cached in network order)
//
-static void cache_ipmap(ipt ip, int s)
+static void cache_ipmap(in_addr_t ip, int s)
{
- ipt nip = htonl(ip); // MUST be in network order. I.e. MSB must in be ((char*)(&ip))[0]
- u8 *a = (u8 *) &nip;
- char **d = (char **) ip_hash;
+ in_addr_t nip = htonl(ip); // MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
+ uint8_t *a = (uint8_t *) &nip;
+ uint8_t **d = (uint8_t **) ip_hash;
int i;
for (i = 0; i < 3; i++)
{
if (!d[(size_t) a[i]])
{
- if (!(d[(size_t) a[i]] = calloc(256, sizeof (void *))))
+ if (!(d[(size_t) a[i]] = calloc(256, sizeof(void *))))
return;
}
- d = (char **) d[(size_t) a[i]];
+ d = (uint8_t **) d[(size_t) a[i]];
}
- d[(size_t) a[3]] = (char *)((int)s);
+ d[(size_t) a[3]] = (uint8_t *) (intptr_t) s;
if (s > 0)
LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));
// else a map to an ip pool index.
}
-static void uncache_ipmap(ipt ip)
+static void uncache_ipmap(in_addr_t ip)
{
cache_ipmap(ip, 0); // Assign it to the NULL session.
}
{
if (!d[i])
continue;
- e = (char**) d[i];
+ e = (char **) d[i];
for (j = 0; j < 256; ++j)
{
if (!e[j])
continue;
- f = (char**) e[j];
+ f = (char **) e[j];
for (k = 0; k < 256; ++k)
{
if (!f[k])
continue;
- g = (char**)f[k];
+ g = (char **)f[k];
for (l = 0; l < 256; ++l)
{
if (!g[l])
continue;
- cli_print(cli, "%7d %d.%d.%d.%d", (int) g[l], i, j, k, l);
+ cli_print(cli, "%7d %d.%d.%d.%d", (int) (intptr_t) g[l], i, j, k, l);
++count;
}
}
int s;
CSTAT(call_sessionbyuser);
- for (s = 1; s < MAXSESSION ; ++s)
+ for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
+ if (!session[s].opened)
+ continue;
+
if (session[s].walled_garden)
continue; // Skip walled garden users.
return 0; // Not found.
}
-void send_garp(ipt ip)
+void send_garp(in_addr_t ip)
{
int s;
struct ifreq ifr;
- u8 mac[6];
+ uint8_t mac[6];
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0)
sendarp(ifr.ifr_ifindex, mac, ip);
}
-// Find session by username, 0 for not found
static sessiont *sessiontbysessionidt(sessionidt s)
{
- if (!s || s > MAXSESSION) return NULL;
+ if (!s || s >= MAXSESSION) return NULL;
return &session[s];
}
static sessionidt sessionidtbysessiont(sessiont *s)
{
sessionidt val = s-session;
- if (s < session || val > MAXSESSION) return 0;
+ if (s < session || val >= MAXSESSION) return 0;
return val;
}
// actually send a control message for a specific tunnel
-void tunnelsend(u8 * buf, u16 l, tunnelidt t)
+void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
{
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
- *(u32 *) & addr.sin_addr = htonl(tunnel[t].ip);
+ *(uint32_t *) & addr.sin_addr = htonl(tunnel[t].ip);
addr.sin_port = htons(tunnel[t].port);
// sequence expected, if sequence in message
- if (*buf & 0x08) *(u16 *) (buf + ((*buf & 0x40) ? 10 : 8)) = htons(tunnel[t].nr);
+ if (*buf & 0x08) *(uint16_t *) (buf + ((*buf & 0x40) ? 10 : 8)) = htons(tunnel[t].nr);
// If this is a control message, deal with retries
if (*buf & 0x80)
if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
{
- LOG(0, ntohs((*(u16 *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
+ LOG(0, ntohs((*(uint16_t *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
STAT(tunnel_tx_errors);
return;
// Tiny helper function to write data to
// the 'tun' device.
//
-int tun_write(u8 * data, int size)
+int tun_write(uint8_t * data, int size)
{
return write(tunfd, data, size);
}
// process outgoing (to tunnel) IP
//
-static void processipout(u8 * buf, int len)
+static void processipout(uint8_t * buf, int len)
{
sessionidt s;
sessiont *sp;
tunnelidt t;
- ipt ip;
+ in_addr_t ip;
- char * data = buf; // Keep a copy of the originals.
+ char *data = buf; // Keep a copy of the originals.
int size = len;
- u8 b[MAXETHER + 20];
+ uint8_t b[MAXETHER + 20];
CSTAT(call_processipout);
if (len < MIN_IP_SIZE)
{
LOG(1, 0, 0, "Short IP, %d bytes\n", len);
- STAT(tunnel_tx_errors);
+ STAT(tun_rx_errors);
return;
}
if (len >= MAXETHER)
{
LOG(1, 0, 0, "Oversize IP packet %d bytes\n", len);
- STAT(tunnel_tx_errors);
+ STAT(tun_rx_errors);
return;
}
len -= 4;
// Got an IP header now
- if (*(u8 *)(buf) >> 4 != 4)
+ if (*(uint8_t *)(buf) >> 4 != 4)
{
LOG(1, 0, 0, "IP: Don't understand anything except IPv4\n");
return;
}
- ip = *(u32 *)(buf + 16);
+ ip = *(uint32_t *)(buf + 16);
if (!(s = sessionbyip(ip)))
{
// Is this a packet for a session that doesn't exist?
if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second.
{
- LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(u32 *)(buf + 12), 0));
- host_unreachable(*(u32 *)(buf + 12), *(u16 *)(buf + 4), ip, buf, (len < 64) ? 64 : len);
+ LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(in_addr_t *)(buf + 12), 0));
+ host_unreachable(*(in_addr_t *)(buf + 12), *(uint16_t *)(buf + 4), ip, buf, (len < 64) ? 64 : len);
}
return;
}
t = session[s].tunnel;
sp = &session[s];
+ // DoS prevention: enforce a maximum number of packets per 0.1s for a session
+ if (config->max_packets > 0)
+ {
+ if (sess_local[s].last_packet_out == TIME)
+ {
+ int max = config->max_packets;
+
+ // All packets for throttled sessions are handled by the
+ // master, so further limit by using the throttle rate.
+ // A bit of a kludge, since throttle rate is in kbps,
+ // but should still be generous given our average DSL
+ // packet size is 200 bytes: a limit of 28kbps equates
+ // to around 180 packets per second.
+ if (!config->cluster_iam_master && sp->throttle_out && sp->throttle_out < max)
+ max = sp->throttle_out;
+
+ if (++sess_local[s].packets_out > max)
+ {
+ sess_local[s].packets_dropped++;
+ return;
+ }
+ }
+ else
+ {
+ if (sess_local[s].packets_dropped)
+ {
+ INC_STAT(tun_rx_dropped, sess_local[s].packets_dropped);
+ LOG(3, s, t, "Dropped %u/%u packets to %s for %suser %s\n",
+ sess_local[s].packets_dropped, sess_local[s].packets_out,
+ fmtaddr(ip, 0), sp->throttle_out ? "throttled " : "",
+ sp->user);
+ }
+
+ sess_local[s].last_packet_out = TIME;
+ sess_local[s].packets_out = 1;
+ sess_local[s].packets_dropped = 0;
+ }
+ }
+
// run access-list if any
if (session[s].filter_out && !ip_filter(buf, len, session[s].filter_out - 1))
return;
// Add on L2TP header
{
- u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
sp->total_cout += len; // byte count
sp->pout++;
udp_tx += len;
- sess_count[s].cout += len; // To send to master..
+ sess_local[s].cout += len; // To send to master..
}
//
// Helper routine for the TBF filters.
// Used to send queued data in to the user!
//
-static void send_ipout(sessionidt s, u8 *buf, int len)
+static void send_ipout(sessionidt s, uint8_t *buf, int len)
{
sessiont *sp;
tunnelidt t;
- ipt ip;
+ in_addr_t ip;
- u8 b[MAXETHER + 20];
+ uint8_t b[MAXETHER + 20];
if (len < 0 || len > MAXETHER)
{
buf += 4;
len -= 4;
- ip = *(u32 *)(buf + 16);
+ ip = *(in_addr_t *)(buf + 16);
if (!session[s].ip)
return;
// Add on L2TP header
{
- u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
sp->total_cout += len; // byte count
sp->pout++;
udp_tx += len;
- sess_count[s].cout += len; // To send to master..
+ sess_local[s].cout += len; // To send to master..
}
// add an AVP (16 bit)
-static void control16(controlt * c, u16 avp, u16 val, u8 m)
+static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
{
- u16 l = (m ? 0x8008 : 0x0008);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
- *(u16 *) (c->buf + c->length + 6) = htons(val);
+ 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->length += 8;
}
// add an AVP (32 bit)
-static void control32(controlt * c, u16 avp, u32 val, u8 m)
+static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
{
- u16 l = (m ? 0x800A : 0x000A);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
- *(u32 *) (c->buf + c->length + 6) = htonl(val);
+ 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->length += 10;
}
// add an AVP (32 bit)
-static void controls(controlt * c, u16 avp, char *val, u8 m)
+static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
{
- u16 l = ((m ? 0x8000 : 0) + strlen(val) + 6);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
+ 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->length += 6 + strlen(val);
}
// add a binary AVP
-static void controlb(controlt * c, u16 avp, char *val, unsigned int len, u8 m)
+static void controlb(controlt * c, uint16_t avp, char *val, unsigned int len, uint8_t m)
{
- u16 l = ((m ? 0x8000 : 0) + len + 6);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
+ 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->length += 6 + len;
}
// new control connection
-static controlt *controlnew(u16 mtype)
+static controlt *controlnew(uint16_t mtype)
{
controlt *c;
if (!controlfree)
}
assert(c);
c->next = 0;
- *(u16 *) (c->buf + 0) = htons(0xC802); // flags/ver
+ *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver
c->length = 12;
control16(c, 0, mtype, 1);
return c;
// (ZLB send).
static void controlnull(tunnelidt t)
{
- u8 buf[12];
+ uint8_t buf[12];
if (tunnel[t].controlc) // Messages queued; They will carry the ack.
return;
- *(u16 *) (buf + 0) = htons(0xC802); // flags/ver
- *(u16 *) (buf + 2) = htons(12); // length
- *(u16 *) (buf + 4) = htons(tunnel[t].far); // tunnel
- *(u16 *) (buf + 6) = htons(0); // session
- *(u16 *) (buf + 8) = htons(tunnel[t].ns); // sequence
- *(u16 *) (buf + 10) = htons(tunnel[t].nr); // sequence
+ *(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);
}
// add a control message to a tunnel, and send if within window
static void controladd(controlt * c, tunnelidt t, sessionidt s)
{
- *(u16 *) (c->buf + 2) = htons(c->length); // length
- *(u16 *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
- *(u16 *) (c->buf + 6) = htons(s ? session[s].far : 0); // session
- *(u16 *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
+ *(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(s ? session[s].far : 0); // session
+ *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
tunnel[t].ns++; // advance sequence
// link in message in to queue
if (tunnel[t].controlc)
//
void throttle_session(sessionidt s, int rate_in, int rate_out)
{
- if (!session[s].tunnel)
+ if (!session[s].opened)
return; // No-one home.
if (!*session[s].user)
// add/remove filters from session (-1 = no change)
void filter_session(sessionidt s, int filter_in, int filter_out)
{
- if (!session[s].tunnel)
+ if (!session[s].opened)
return; // No-one home.
if (!*session[s].user)
CSTAT(call_sessionshutdown);
- if (!session[s].tunnel)
+ if (!session[s].opened)
{
- LOG(3, s, session[s].tunnel, "Called sessionshutdown on a session with no tunnel.\n");
+ LOG(3, s, session[s].tunnel, "Called sessionshutdown on an unopened session.\n");
return; // not a live session
}
run_plugins(PLUGIN_KILL_SESSION, &data);
}
- // RADIUS Stop message
- if (session[s].opened && !walled_garden && !session[s].die)
+ if (session[s].ip && !walled_garden && !session[s].die)
{
- u16 r = session[s].radius;
+ // RADIUS Stop message
+ uint16_t r = session[s].radius;
if (!r)
{
if (!(r = radiusnew(s)))
{
LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
- STAT(radius_overflow);
}
else
{
radius[r].auth[n] = rand();
}
}
+
if (r && radius[r].state != RADIUSSTOP)
radiussend(r, RADIUSSTOP); // stop, if not already trying
+
+ // Save counters to dump to accounting file
+ if (*config->accounting_dir && shut_acct_n < sizeof(shut_acct) / sizeof(*shut_acct))
+ memcpy(&shut_acct[shut_acct_n++], &session[s], sizeof(session[s]));
}
if (session[s].ip)
}
if (!session[s].die)
- session[s].die = now() + 150; // Clean up in 15 seconds
+ session[s].die = TIME + 150; // Clean up in 15 seconds
// update filter refcounts
if (session[s].filter_in) ip_filters[session[s].filter_in - 1].used--;
void sendipcp(tunnelidt t, sessionidt s)
{
- u8 buf[MAXCONTROL];
- u16 r = session[s].radius;
- u8 *q;
+ uint8_t buf[MAXCONTROL];
+ uint16_t r = session[s].radius;
+ uint8_t *q;
CSTAT(call_sendipcp);
if (!r)
r = radiusnew(s);
+ if (!r)
+ {
+ sessionshutdown(s, "No free RADIUS sessions for IPCP");
+ return;
+ }
+
if (radius[r].state != RADIUSIPCP)
{
radius[r].state = RADIUSIPCP;
if (!q) return;
*q = ConfigReq;
- q[1] = r << RADIUS_SHIFT; // ID, dont care, we only send one type of request
- *(u16 *) (q + 2) = htons(10);
+ q[1] = r >> RADIUS_SHIFT; // ID, dont care, we only send one type of request
+ *(uint16_t *) (q + 2) = htons(10);
q[4] = 3;
q[5] = 6;
- *(u32 *) (q + 6) = config->peer_address ? config->peer_address :
- config->bind_address ? config->bind_address :
- my_address; // send my IP
+ *(in_addr_t *) (q + 6) = config->peer_address ? config->peer_address :
+ config->bind_address ? config->bind_address :
+ my_address; // send my IP
tunnelsend(buf, 10 + (q - buf), t); // send it
session[s].flags &= ~SF_IPCP_ACKED; // Clear flag.
}
+static void sessionclear(sessionidt s)
+{
+ memset(&session[s], 0, sizeof(session[s]));
+ memset(&sess_local[s], 0, sizeof(sess_local[s]));
+ memset(&cli_session_actions[s], 0, sizeof(cli_session_actions[s]));
+
+ session[s].tunnel = T_FREE; // Mark it as free.
+ session[s].next = sessionfree;
+ sessionfree = s;
+}
+
// kill a session now
-static void sessionkill(sessionidt s, char *reason)
+void sessionkill(sessionidt s, char *reason)
{
CSTAT(call_sessionkill);
- session[s].die = now();
+ if (!session[s].opened) // not alive
+ return;
+
+ if (session[s].next)
+ {
+ LOG(0, s, session[s].tunnel, "Tried to kill a session with next pointer set (%d)\n", session[s].next);
+ return;
+ }
+
+ session[s].die = TIME;
sessionshutdown(s, reason); // close radius/routes, etc.
if (session[s].radius)
radiusclear(session[s].radius, s); // cant send clean accounting data, session is killed
LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
-
- memset(&session[s], 0, sizeof(session[s]));
- session[s].tunnel = T_FREE; // Mark it as free.
- session[s].next = sessionfree;
- sessionfree = s;
- cli_session_actions[s].action = 0;
+ sessionclear(s);
cluster_send_session(s);
}
controlfree = c;
}
// kill sessions
- for (s = 1; s < MAXSESSION; s++)
+ for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
if (session[s].tunnel == t)
sessionkill(s, reason);
LOG(1, 0, t, "Shutting down tunnel %d (%s)\n", t, reason);
// close session
- for (s = 1; s < MAXSESSION; s++)
+ for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
if (session[s].tunnel == t)
sessionshutdown(s, reason);
tunnel[t].state = TUNNELDIE;
- tunnel[t].die = now() + 700; // Clean up in 70 seconds
+ tunnel[t].die = TIME + 700; // Clean up in 70 seconds
cluster_send_tunnel(t);
// TBA - should we wait for sessions to stop?
{ // Send StopCCN
}
// read and process packet on tunnel (UDP)
-void processudp(u8 * buf, int len, struct sockaddr_in *addr)
+void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
{
char *chapresponse = NULL;
- u16 l = len, t = 0, s = 0, ns = 0, nr = 0;
- u8 *p = buf + 2;
+ uint16_t l = len, t = 0, s = 0, ns = 0, nr = 0;
+ uint8_t *p = buf + 2;
CSTAT(call_processudp);
}
if (*buf & 0x40)
{ // length
- l = ntohs(*(u16 *) p);
+ l = ntohs(*(uint16_t *) p);
p += 2;
}
- t = ntohs(*(u16 *) p);
+ t = ntohs(*(uint16_t *) p);
p += 2;
- s = ntohs(*(u16 *) p);
+ s = ntohs(*(uint16_t *) p);
p += 2;
if (s >= MAXSESSION)
{
}
if (*buf & 0x08)
{ // ns/nr
- ns = ntohs(*(u16 *) p);
+ ns = ntohs(*(uint16_t *) p);
p += 2;
- nr = ntohs(*(u16 *) p);
+ nr = ntohs(*(uint16_t *) p);
p += 2;
}
if (*buf & 0x02)
{ // offset
- u16 o = ntohs(*(u16 *) p);
+ uint16_t o = ntohs(*(uint16_t *) p);
p += o + 2;
}
if ((p - buf) > l)
{
- LOG(1, s, t, "Bad length %d>%d\n", (p - buf), l);
+ LOG(1, s, t, "Bad length %d>%d\n", (int) (p - buf), l);
STAT(tunnel_rx_errors);
return;
}
l -= (p - buf);
if (*buf & 0x80)
{ // control
- u16 message = 0xFFFF; // message type
- u8 fatal = 0;
- u8 mandatorymessage = 0;
- u8 chap = 0; // if CHAP being used
- u16 asession = 0; // assigned session
- u32 amagic = 0; // magic number
- u8 aflags = 0; // flags from last LCF
- u16 version = 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
- int requestchap = 0; // do we request PAP instead of original CHAP request?
- char called[MAXTEL] = ""; // called number
- char calling[MAXTEL] = ""; // calling number
+ uint16_t message = 0xFFFF; // message type
+ uint8_t fatal = 0;
+ uint8_t mandatorymessage = 0;
+ uint8_t chap = 0; // if CHAP being used
+ uint16_t asession = 0; // assigned session
+ uint32_t amagic = 0; // magic number
+ uint8_t aflags = 0; // flags from last LCF
+ uint16_t version = 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
+ int requestchap = 0; // do we request PAP instead of original CHAP request?
+ char called[MAXTEL] = ""; // called number
+ char calling[MAXTEL] = ""; // calling number
if (!config->cluster_iam_master)
{
for (i = 1; i <= config->cluster_highest_tunnelid ; ++i)
{
if (tunnel[i].state != TUNNELOPENING ||
- tunnel[i].ip != ntohl(*(ipt *) & addr->sin_addr) ||
+ tunnel[i].ip != ntohl(*(in_addr_t *) & addr->sin_addr) ||
tunnel[i].port != ntohs(addr->sin_port) )
continue;
t = i;
return;
}
tunnelclear(t);
- tunnel[t].ip = ntohl(*(ipt *) & addr->sin_addr);
+ tunnel[t].ip = ntohl(*(in_addr_t *) & addr->sin_addr);
tunnel[t].port = ntohs(addr->sin_port);
tunnel[t].window = 4; // default window
STAT(tunnel_created);
// process AVPs
while (l && !(fatal & 0x80))
{
- u16 n = (ntohs(*(u16 *) p) & 0x3FF);
- u8 *b = p;
- u8 flags = *p;
- u16 mtype;
+ uint16_t n = (ntohs(*(uint16_t *) p) & 0x3FF);
+ uint8_t *b = p;
+ uint8_t flags = *p;
+ uint16_t mtype;
p += n; // next
if (l < n)
{
continue; // next
}
b += 2;
- if (*(u16 *) (b))
+ if (*(uint16_t *) (b))
{
- LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(u16 *) (b)));
+ LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(uint16_t *) (b)));
fatal = flags;
continue; // next
}
b += 2;
- mtype = ntohs(*(u16 *) (b));
+ mtype = ntohs(*(uint16_t *) (b));
b += 2;
n -= 6;
switch (mtype)
{
case 0: // message type
- message = ntohs(*(u16 *) b);
+ message = ntohs(*(uint16_t *) b);
LOG(4, s, t, " Message type = %d (%s)\n", *b, l2tp_message_types[message]);
mandatorymessage = flags;
break;
case 1: // result code
{
- u16 rescode = ntohs(*(u16 *)(b));
+ uint16_t rescode = ntohs(*(uint16_t *) b);
const char* resdesc = "(unknown)";
if (message == 4)
{ /* StopCCN */
LOG(4, s, t, " Result Code %d: %s\n", rescode, resdesc);
if (n >= 4)
{
- u16 errcode = ntohs(*(u16 *)(b + 2));
+ uint16_t errcode = ntohs(*(uint16_t *)(b + 2));
const char* errdesc = "(unknown)";
if (errcode <= MAX_ERROR_CODE)
errdesc = error_codes[errcode];
break;
case 2: // protocol version
{
- version = ntohs(*(u16 *) (b));
+ version = ntohs(*(uint16_t *) (b));
LOG(4, s, t, " Protocol version = %d\n", version);
if (version && version != 0x0100)
{ // allow 0.0 and 1.0
LOG(4, s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor);
break;
case 9: // assigned tunnel
- tunnel[t].far = ntohs(*(u16 *) (b));
+ tunnel[t].far = ntohs(*(uint16_t *) (b));
LOG(4, s, t, " Remote tunnel id = %d\n", tunnel[t].far);
break;
case 10: // rx window
- tunnel[t].window = ntohs(*(u16 *) (b));
+ tunnel[t].window = ntohs(*(uint16_t *) (b));
if (!tunnel[t].window)
tunnel[t].window = 1; // window of 0 is silly
LOG(4, s, t, " rx window = %d\n", tunnel[t].window);
break;
case 14: // assigned session
- asession = session[s].far = ntohs(*(u16 *) (b));
+ asession = session[s].far = ntohs(*(uint16_t *) (b));
LOG(4, s, t, " assigned session = %d\n", asession);
break;
case 15: // call serial number
- LOG(4, s, t, " call serial number = %d\n", ntohl(*(u32 *)b));
+ LOG(4, s, t, " call serial number = %d\n", ntohl(*(uint32_t *)b));
break;
case 18: // bearer type
- LOG(4, s, t, " bearer type = %d\n", ntohl(*(u32 *)b));
+ LOG(4, s, t, " bearer type = %d\n", ntohl(*(uint32_t *)b));
// TBA - for RADIUS
break;
case 19: // framing type
- LOG(4, s, t, " framing type = %d\n", ntohl(*(u32 *)b));
+ LOG(4, s, t, " framing type = %d\n", ntohl(*(uint32_t *)b));
// TBA
break;
case 21: // called number
case 24: // tx connect speed
if (n == 4)
{
- session[s].tx_connect_speed = ntohl(*(u32 *)b);
+ session[s].tx_connect_speed = ntohl(*(uint32_t *)b);
}
else
{
case 38: // rx connect speed
if (n == 4)
{
- session[s].rx_connect_speed = ntohl(*(u32 *)b);
+ session[s].rx_connect_speed = ntohl(*(uint32_t *)b);
}
else
{
break;
case 25: // Physical Channel ID
{
- u32 tmp = ntohl(*(u32 *)b);
+ uint32_t tmp = ntohl(*(uint32_t *) b);
LOG(4, s, t, " Physical Channel ID <%X>\n", tmp);
break;
}
case 29: // Proxy Authentication Type
{
- u16 authtype = ntohs(*(u16 *)b);
+ uint16_t authtype = ntohs(*(uint16_t *)b);
LOG(4, s, t, " Proxy Auth Type %d (%s)\n", authtype, authtypes[authtype]);
requestchap = (authtype == 2);
break;
}
case 32: // Proxy Authentication ID
{
- u16 authid = ntohs(*(u16 *)(b));
+ uint16_t authid = ntohs(*(uint16_t *)(b));
LOG(4, s, t, " Proxy Auth ID (%d)\n", authid);
if (session[s].radius)
radius[session[s].radius].id = authid;
}
case 27: // last send lcp
{ // find magic number
- u8 *p = b, *e = p + n;
+ uint8_t *p = b, *e = p + n;
while (p + 1 < e && p[1] && p + p[1] <= e)
{
if (*p == 5 && p[1] == 6) // Magic-Number
- amagic = ntohl(*(u32 *) (p + 2));
- else if (*p == 3 && p[1] == 5 && *(u16 *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol
+ amagic = ntohl(*(uint32_t *) (p + 2));
+ else if (*p == 3 && p[1] == 5 && *(uint16_t *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol
chap = 1;
else if (*p == 7) // Protocol-Field-Compression
aflags |= SESSIONPFC;
if (!sessionfree)
{
STAT(session_overflow);
- tunnelshutdown(t, "No free sessions");
+ LOG(1, 0, t, "No free sessions\n");
+ return;
}
else
{
- u16 r;
+ uint16_t r;
controlt *c;
s = sessionfree;
if (!(r = radiusnew(s)))
{
LOG(1, s, t, "No free RADIUS sessions for ICRQ\n");
- sessionkill(s, "no free RADIUS sesions");
+ sessionclear(s);
return;
}
c = controlnew(11); // sending ICRP
session[s].id = sessionid++;
- session[s].opened = time(NULL);
+ session[s].opened = time_now;
session[s].tunnel = t;
session[s].far = asession;
session[s].last_packet = time_now;
}
else
{ // data
- u16 prot;
+ uint16_t prot;
LOG_HEX(5, "Receive Tunnel Data", p, l);
if (l > 2 && p[0] == 0xFF && p[1] == 0x03)
}
else
{
- prot = ntohs(*(u16 *) p);
+ prot = ntohs(*(uint16_t *) p);
p += 2;
l -= 2;
}
- if (s && !session[s].tunnel) // Is something wrong??
+ if (s && !session[s].opened) // Is something wrong??
{
if (!config->cluster_iam_master)
{
return;
}
-
- LOG(1, s, t, "UDP packet contains session %d but no session[%d].tunnel "
- "exists (LAC said tunnel = %d). Dropping packet.\n", s, s, t);
-
+ LOG(1, s, t, "UDP packet contains session which is not opened. Dropping packet.\n");
STAT(tunnel_rx_errors);
return;
}
}
// read and process packet on tun
-static void processtun(u8 * buf, int len)
+static void processtun(uint8_t * buf, int len)
{
LOG_HEX(5, "Receive TUN Data", buf, len);
STAT(tun_rx_packets);
return;
}
- if (*(u16 *) (buf + 2) == htons(PKTIP)) // IP
+ if (*(uint16_t *) (buf + 2) == htons(PKTIP)) // IP
processipout(buf, len);
// Else discard.
}
-//
-// Maximum number of actions to complete.
-// This is to avoid sending out too many packets
-// at once.
-#define MAX_ACTIONS 500
-
-static int regular_cleanups(void)
+// Handle retries, timeouts. Runs every 1/10th sec, want to ensure
+// that we look at the whole of the tunnel, radius and session tables
+// every second
+static void regular_cleanups(double period)
{
- static sessionidt s = 0; // Next session to check for actions on.
- tunnelidt t;
- int count=0,i;
- u16 r;
- static clockt next_acct = 0;
+ // Next tunnel, radius and session to check for actions on.
+ static tunnelidt t = 0;
+ static int r = 0;
+ static sessionidt s = 0;
+
+ int t_actions = 0;
+ int r_actions = 0;
+ int s_actions = 0;
+
+ int t_slice;
+ int r_slice;
+ int s_slice;
+
+ int i;
int a;
- LOG(3, 0, 0, "Begin regular cleanup\n");
+ // divide up tables into slices based on the last run
+ t_slice = config->cluster_highest_tunnelid * period;
+ r_slice = (MAXRADIUS - 1) * period;
+ s_slice = config->cluster_highest_sessionid * period;
- for (r = 1; r < MAXRADIUS; r++)
- {
- if (!radius[r].state)
- continue;
- if (radius[r].retry)
- {
- if (radius[r].retry <= TIME)
- radiusretry(r);
- } else
- radius[r].retry = backoff(radius[r].try+1); // Is this really needed? --mo
- }
- for (t = 1; t <= config->cluster_highest_tunnelid; t++)
+ if (t_slice < 1)
+ t_slice = 1;
+ else if (t_slice > config->cluster_highest_tunnelid)
+ t_slice = config->cluster_highest_tunnelid;
+
+ if (r_slice < 1)
+ r_slice = 1;
+ else if (r_slice > (MAXRADIUS - 1))
+ r_slice = MAXRADIUS - 1;
+
+ if (s_slice < 1)
+ s_slice = 1;
+ else if (s_slice > config->cluster_highest_sessionid)
+ s_slice = config->cluster_highest_sessionid;
+
+ LOG(4, 0, 0, "Begin regular cleanup (last %f seconds ago)\n", period);
+
+ for (i = 0; i < t_slice; i++)
{
+ t++;
+ if (t > config->cluster_highest_tunnelid)
+ t = 1;
+
// check for expired tunnels
if (tunnel[t].die && tunnel[t].die <= TIME)
{
STAT(tunnel_timeout);
tunnelkill(t, "Expired");
+ t_actions++;
continue;
}
// check for message resend
if (tunnel[t].retry <= TIME)
{
controlt *c = tunnel[t].controls;
- u8 w = tunnel[t].window;
+ uint8_t w = tunnel[t].window;
tunnel[t].try++; // another try
if (tunnel[t].try > 5)
tunnelkill(t, "Timeout on control message"); // game over
tunnelsend(c->buf, c->length, t);
c = c->next;
}
+
+ t_actions++;
}
}
// Send hello
controlt *c = controlnew(6); // sending HELLO
controladd(c, t, 0); // send the message
LOG(3, 0, t, "Sending HELLO message\n");
+ t_actions++;
}
// Check for tunnel changes requested from the CLI
{
LOG(2, 0, t, "Dropping tunnel by CLI\n");
tunnelshutdown(t, "Requested by administrator");
+ t_actions++;
}
}
+ }
+ for (i = 0; i < r_slice; i++)
+ {
+ r++;
+ if (r >= MAXRADIUS)
+ r = 1;
+
+ if (!radius[r].state)
+ continue;
+
+ if (radius[r].retry <= TIME)
+ {
+ radiusretry(r);
+ r_actions++;
+ }
}
- count = 0;
- for (i = 1; i <= config->cluster_highest_sessionid; i++)
+ for (i = 0; i < s_slice; i++)
{
s++;
if (s > config->cluster_highest_sessionid)
s = 1;
- if (!session[s].tunnel) // Session isn't in use
+ if (!session[s].opened) // Session isn't in use
continue;
if (!session[s].die && session[s].ip && !(session[s].flags & SF_IPCP_ACKED))
// IPCP has not completed yet. Resend
LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
sendipcp(session[s].tunnel, s);
+ s_actions++;
}
// check for expired sessions
if (session[s].die && session[s].die <= TIME)
{
sessionkill(s, "Expired");
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
continue;
}
// Drop sessions who have not responded within IDLE_TIMEOUT seconds
if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
{
- sessionkill(s, "No response to LCP ECHO requests");
+ sessionshutdown(s, "No response to LCP ECHO requests");
STAT(session_timeout);
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
continue;
}
// No data in IDLE_TIMEOUT seconds, send LCP ECHO
if (session[s].user[0] && (time_now - session[s].last_packet >= ECHO_TIMEOUT))
{
- u8 b[MAXCONTROL] = {0};
+ uint8_t b[MAXCONTROL] = {0};
- u8 *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP);
+ uint8_t *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP);
if (!q) continue;
*q = EchoReq;
- *(u8 *)(q + 1) = (time_now % 255); // ID
- *(u16 *)(q + 2) = htons(8); // Length
- *(u32 *)(q + 4) = 0; // Magic Number (not supported)
+ *(uint8_t *)(q + 1) = (time_now % 255); // ID
+ *(uint16_t *)(q + 2) = htons(8); // Length
+ *(uint32_t *)(q + 4) = 0; // Magic Number (not supported)
LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
(int)(time_now - session[s].last_packet));
tunnelsend(b, 24, session[s].tunnel); // send it
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
}
// Check for actions requested from the CLI
LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
sessionshutdown(s, "Requested by administrator");
a = 0; // dead, no need to check for other actions
+ s_actions++;
}
if (a & CLI_SESS_NOSNOOP)
LOG(2, s, session[s].tunnel, "Unsnooping session by CLI\n");
session[s].snoop_ip = 0;
session[s].snoop_port = 0;
+ s_actions++;
send++;
}
else if (a & CLI_SESS_SNOOP)
session[s].snoop_ip = cli_session_actions[s].snoop_ip;
session[s].snoop_port = cli_session_actions[s].snoop_port;
+ s_actions++;
send++;
}
{
LOG(2, s, session[s].tunnel, "Un-throttling session by CLI\n");
throttle_session(s, 0, 0);
+ s_actions++;
send++;
}
else if (a & CLI_SESS_THROTTLE)
cli_session_actions[s].throttle_out);
throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out);
+ s_actions++;
send++;
}
{
LOG(2, s, session[s].tunnel, "Un-filtering session by CLI\n");
filter_session(s, 0, 0);
+ s_actions++;
send++;
}
else if (a & CLI_SESS_FILTER)
cli_session_actions[s].filter_out);
filter_session(s, cli_session_actions[s].filter_in, cli_session_actions[s].filter_out);
+ s_actions++;
send++;
}
if (send)
cluster_send_session(s);
-
- if (++count >= MAX_ACTIONS) break;
}
}
- if (*config->accounting_dir && next_acct <= TIME)
- {
- // Dump accounting data
- next_acct = TIME + ACCT_TIME;
- dump_acct_info();
- }
-
- if (count >= MAX_ACTIONS)
- return 1; // Didn't finish!
-
- LOG(3, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count, config->cleanup_interval);
- return 0;
+ LOG(4, 0, 0, "End regular cleanup: checked %d/%d/%d tunnels/radius/sessions; %d/%d/%d actions\n",
+ t_slice, r_slice, s_slice, t_actions, r_actions, s_actions);
}
-
//
// Are we in the middle of a tunnel update, or radius
// requests??
static int still_busy(void)
{
int i;
+ static time_t stopped_bgp = 0;
static clockt last_talked = 0;
static clockt start_busy_wait = 0;
+
+ if (!config->cluster_iam_master)
+ {
+#ifdef BGP
+ if (bgp_configured)
+ {
+ if (!stopped_bgp)
+ {
+ 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]);
+
+ stopped_bgp = time_now;
+
+ // we don't want to become master
+ cluster_send_ping(0);
+
+ return 1;
+ }
+
+ if (time_now < (stopped_bgp + QUIT_DELAY))
+ return 1;
+ }
+#endif /* BGP */
+
+ return 0;
+ }
+
if (start_busy_wait == 0)
start_busy_wait = TIME;
static void mainloop(void)
{
int i;
- u8 buf[65536];
+ uint8_t buf[65536];
struct timeval to;
clockt next_cluster_ping = 0; // send initial ping immediately
- time_t next_clean = time_now + config->cleanup_interval;
LOG(4, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
udpfd, tunfd, cluster_sockfd, controlfd);
fd_set w;
int bgp_set[BGP_NUM_PEERS];
#endif /* BGP */
+ int more = 0;
if (config->reload_config)
{
n = select(n + 1, &r, 0, 0, &to);
#endif /* BGP */
- TIME = now();
+ STAT(select_called);
+
+ TIME = now(NULL);
if (n < 0)
{
if (errno == EINTR ||
{
struct sockaddr_in addr;
int alen, c, s;
+ int udp_pkts = 0;
+ int tun_pkts = 0;
+ int cluster_pkts = 0;
// nsctl commands
if (FD_ISSET(controlfd, &r))
int cli;
alen = sizeof(addr);
- if ((cli = accept(clifd, (struct sockaddr *)&addr, &len)) >= 0)
+ if ((cli = accept(clifd, (struct sockaddr *)&addr, &alen)) >= 0)
{
cli_do(cli);
close(cli);
if ((s = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
{
processudp(buf, s, &addr);
+ udp_pkts++;
}
else
{
// incoming IP
if (FD_ISSET(tunfd, &r))
{
- if ((n = read(tunfd, buf, sizeof(buf))) > 0)
+ if ((s = read(tunfd, buf, sizeof(buf))) > 0)
{
- processtun(buf, n);
+ processtun(buf, s);
+ tun_pkts++;
}
else
{
if ((s = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen)) > 0)
{
processcluster(buf, s, addr.sin_addr.s_addr);
+ cluster_pkts++;
}
else
{
}
}
}
+
+ if (udp_pkts > 1 || tun_pkts > 1 || cluster_pkts > 1)
+ STAT(multi_read_used);
+
+ if (c >= config->multi_read_count)
+ {
+ LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
+ config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
+
+ STAT(multi_read_exceeded);
+ more++;
+ }
}
// Runs on every machine (master and slaves).
next_cluster_ping = TIME + config->cluster_hb_interval;
}
+ if (!config->cluster_iam_master)
+ continue;
+
// Run token bucket filtering queue..
// Only run it every 1/10th of a second.
- // Runs on all machines both master and slave.
{
static clockt last_run = 0;
if (last_run != TIME)
}
}
- /* Handle timeouts. Make sure that this gets run anyway, even if there was
- * something to read, else under load this will never actually run....
- *
- */
- if (config->cluster_iam_master && next_clean <= time_now)
+ // Handle timeouts, retries etc.
{
- if (regular_cleanups())
+ static double last_clean = 0;
+ double this_clean;
+ double diff;
+
+ TIME = now(&this_clean);
+ diff = this_clean - last_clean;
+
+ // Run during idle time (after we've handled
+ // all incoming packets) or every 1/10th sec
+ if (!more || diff > 0.1)
{
- // Did it finish?
- next_clean = time_now + 1 ; // Didn't finish. Check quickly.
+ regular_cleanups(diff);
+ last_clean = this_clean;
}
- else
+ }
+
+ if (*config->accounting_dir)
+ {
+ static clockt next_acct = 0;
+ static clockt next_shut_acct = 0;
+
+ if (next_acct <= TIME)
{
- next_clean = time_now + config->cleanup_interval; // Did. Move to next interval.
+ // Dump accounting data
+ next_acct = TIME + ACCT_TIME;
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ dump_acct_info(1);
+ }
+ else if (next_shut_acct <= TIME)
+ {
+ // Dump accounting data for shutdown sessions
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ if (shut_acct_n)
+ dump_acct_info(0);
}
}
}
//
// Important!!! We MUST not process any packets past this point!
+ LOG(1, 0, 0, "Clean shutdown complete\n");
}
static void stripdomain(char *host)
config->debug = optdebug;
config->num_tbfs = MAXTBFS;
config->rl_rate = 28; // 28kbps
+ config->cluster_master_min_adv = 1;
if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
{
exit(1);
}
- if (!(sess_count = shared_malloc(sizeof(sessioncountt) * MAXSESSION)))
+ if (!(sess_local = shared_malloc(sizeof(sessionlocalt) * MAXSESSION)))
{
- LOG(0, 0, 0, "Error doing malloc for sessions_count: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for sess_local: %s\n", strerror(errno));
exit(1);
}
memset(ip_address_pool, 0, sizeof(ippoolt) * MAXIPPOOL);
// Put all the sessions on the free list marked as undefined.
- for (i = 1; i < MAXSESSION - 1; i++)
+ for (i = 1; i < MAXSESSION; i++)
{
session[i].next = i + 1;
session[i].tunnel = T_UNDEF; // mark it as not filled in.
sessionfree = 1;
// Mark all the tunnels as undefined (waiting to be filled in by a download).
- for (i = 1; i < MAXTUNNEL- 1; i++)
+ for (i = 1; i < MAXTUNNEL; i++)
tunnel[i].state = TUNNELUNDEF; // mark it as not filled in.
if (!*hostname)
static int assign_ip_address(sessionidt s)
{
- u32 i;
+ uint32_t i;
int best = -1;
time_t best_time = time_now;
char *u = session[s].user;
for (i = 0; i < MAXSESSION; ++i)
{
int ipid;
- if (!session[i].ip || !session[i].tunnel)
+ if (!(session[i].opened && session[i].ip))
continue;
ipid = - lookup_ipmap(htonl(session[i].ip));
//
// Add a block of addresses to the IP pool to hand out.
//
-static void add_to_ip_pool(u32 addr, u32 mask)
+static void add_to_ip_pool(in_addr_t addr, in_addr_t mask)
{
int i;
if (mask == 0)
if ((p = (char *)strrchr(buf, '\n'))) *p = 0;
if ((p = (char *)strchr(buf, ':')))
{
- ipt src;
+ in_addr_t src;
*p = '\0';
src = inet_addr(buf);
if (src == INADDR_NONE)
{
// It's a range
int numbits = 0;
- u32 start = 0, mask = 0;
+ in_addr_t start = 0, mask = 0;
LOG(2, 0, 0, "Adding IP address range %s\n", buf);
*p++ = 0;
continue;
}
start = ntohl(inet_addr(pool));
- mask = (u32)(pow(2, numbits) - 1) << (32 - numbits);
+ 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",
LOG(1, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1);
}
-void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port)
+void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port)
{
struct sockaddr_in snoop_addr = {0};
if (!destination || !port || snoopfd <= 0 || size <= 0 || !packet)
snoop_addr.sin_addr.s_addr = destination;
snoop_addr.sin_port = ntohs(port);
- LOG(5, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n",
- packet, size, fmtaddr(snoop_addr.sin_addr.s_addr, 0),
+ LOG(5, 0, 0, "Snooping %d byte packet to %s:%d\n", size,
+ fmtaddr(snoop_addr.sin_addr.s_addr, 0),
htons(snoop_addr.sin_port));
if (sendto(snoopfd, packet, size, MSG_DONTWAIT | MSG_NOSIGNAL, (void *) &snoop_addr, sizeof(snoop_addr)) < 0)
STAT(packets_snooped);
}
-static void dump_acct_info()
+static int dump_session(FILE **f, sessiont *s)
+{
+ if (!s->opened || !s->ip || !(s->cin || s->cout) || !*s->user || s->walled_garden)
+ return 1;
+
+ if (!*f)
+ {
+ char filename[1024];
+ char timestr[64];
+ time_t now = time(NULL);
+
+ strftime(timestr, sizeof(timestr), "%Y%m%d%H%M%S", localtime(&now));
+ snprintf(filename, sizeof(filename), "%s/%s", config->accounting_dir, timestr);
+
+ if (!(*f = fopen(filename, "w")))
+ {
+ LOG(0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
+ return 0;
+ }
+
+ LOG(3, 0, 0, "Dumping accounting information to %s\n", filename);
+ fprintf(*f, "# dslwatch.pl dump file V1.01\n"
+ "# host: %s\n"
+ "# time: %ld\n"
+ "# uptime: %ld\n"
+ "# format: username ip qos uptxoctets downrxoctets\n",
+ hostname,
+ now,
+ now - basetime);
+ }
+
+ LOG(4, 0, 0, "Dumping accounting information for %s\n", s->user);
+ fprintf(*f, "%s %s %d %u %u\n",
+ s->user, // username
+ fmtaddr(htonl(s->ip), 0), // ip
+ (s->throttle_in || s->throttle_out) ? 2 : 1, // qos
+ (uint32_t) s->cin, // uptxoctets
+ (uint32_t) s->cout); // downrxoctets
+
+ s->pin = s->cin = 0;
+ s->pout = s->cout = 0;
+
+ return 1;
+}
+
+static void dump_acct_info(int all)
{
- char filename[1024];
- char timestr[64];
- time_t t = time(NULL);
int i;
FILE *f = NULL;
CSTAT(call_dump_acct_info);
- strftime(timestr, 64, "%Y%m%d%H%M%S", localtime(&t));
- snprintf(filename, 1024, "%s/%s", config->accounting_dir, timestr);
-
- for (i = 0; i < MAXSESSION; i++)
+ if (shut_acct_n)
{
- if (!session[i].opened || !session[i].ip || !(session[i].cin || session[i].cout) || !*session[i].user || session[i].walled_garden)
- continue;
- if (!f)
- {
- time_t now = time(NULL);
- if (!(f = fopen(filename, "w")))
- {
- LOG(0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
- return ;
- }
- LOG(3, 0, 0, "Dumping accounting information to %s\n", filename);
- fprintf(f, "# dslwatch.pl dump file V1.01\n"
- "# host: %s\n"
- "# time: %ld\n"
- "# uptime: %ld\n"
- "# format: username ip qos uptxoctets downrxoctets\n",
- hostname,
- now,
- now - basetime);
- }
-
- LOG(4, 0, 0, "Dumping accounting information for %s\n", session[i].user);
- fprintf(f, "%s %s %d %u %u\n",
- session[i].user, // username
- fmtaddr(htonl(session[i].ip), 0), // ip
- (session[i].throttle_in || session[i].throttle_out) ? 2 : 1, // qos
- (u32)session[i].cin, // uptxoctets
- (u32)session[i].cout); // downrxoctets
+ for (i = 0; i < shut_acct_n; i++)
+ dump_session(&f, &shut_acct[i]);
- session[i].pin = session[i].cin = 0;
- session[i].pout = session[i].cout = 0;
+ shut_acct_n = 0;
}
+ if (all)
+ for (i = 1; i <= config->cluster_highest_sessionid; i++)
+ dump_session(&f, &session[i]);
+
if (f)
fclose(f);
}
init_tbf(config->num_tbfs);
LOG(0, 0, 0, "L2TPNS version " VERSION "\n");
- LOG(0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
+ LOG(0, 0, 0, "Copyright (c) 2003, 2004, 2005 Optus Internet Engineering\n");
LOG(0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
{
struct rlimit rlim;
mainloop();
-#ifdef BGP
- /* try to shut BGP down cleanly; with luck the sockets will be
- writable since we're out of the select */
- for (i = 0; i < BGP_NUM_PEERS; i++)
- if (bgp_peers[i].state == Established)
- bgp_stop(&bgp_peers[i]);
-#endif /* BGP */
-
/* remove plugins (so cleanup code gets run) */
plugins_done();
int i;
LOG(1, 0, 0, "Shutting down without saving sessions\n");
- for (i = 1; i < MAXSESSION; i++)
- {
- if (session[i].opened)
- sessionkill(i, "L2TPNS Closing");
- }
- for (i = 1; i < MAXTUNNEL; i++)
+
+ if (config->cluster_iam_master)
{
- if (tunnel[i].ip || tunnel[i].state)
- tunnelshutdown(i, "L2TPNS Closing");
+ for (i = 1; i < MAXSESSION; i++)
+ {
+ if (session[i].opened)
+ sessionkill(i, "L2TPNS Closing");
+ }
+ for (i = 1; i < MAXTUNNEL; i++)
+ {
+ if (tunnel[i].ip || tunnel[i].state)
+ tunnelshutdown(i, "L2TPNS Closing");
+ }
}
main_quit++;
ippoolt itmp;
FILE *f;
char magic[sizeof(DUMP_MAGIC) - 1];
- u32 buf[2];
+ uint32_t buf[2];
if (!config->save_state)
{
static void dump_state()
{
FILE *f;
- u32 buf[2];
+ uint32_t buf[2];
if (!config->save_state)
return;
unlink(STATEFILE);
}
-static void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response)
+static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response)
{
MD5_CTX ctx;
*challenge_response = NULL;
if (!config->numradiusservers)
LOG(0, 0, 0, "No RADIUS servers defined!\n");
- config->num_radfds = 2 << RADIUS_SHIFT;
+ config->num_radfds = 1 << RADIUS_SHIFT;
// Update plugins
for (i = 0; i < MAXPLUGINS; i++)
}
}
memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
- if (!config->cleanup_interval) config->cleanup_interval = 10;
if (!config->multi_read_count) config->multi_read_count = 10;
if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);
if (!*config->cluster_interface)
int sessionsetup(tunnelidt t, sessionidt s)
{
// A session now exists, set it up
- ipt ip;
+ in_addr_t ip;
char *user;
sessionidt i;
int r;
LOG(3, s, t, "Doing session setup for session\n");
- if (!session[s].ip || session[s].ip == 0xFFFFFFFE)
+ if (!session[s].ip)
{
assign_ip_address(s);
if (!session[s].ip)
// for walking the sessions to forward byte counts to the master.
config->cluster_highest_sessionid = s;
- // TEMP: old session struct used a u32 to define the throttle
- // speed for both up/down, new uses a u16 for each. Deal with
+ // TEMP: old session struct used a uint32_t to define the throttle
+ // speed for both up/down, new uses a uint16_t for each. Deal with
// sessions from an old master for migration.
if (new->throttle_out == 0 && new->tbf_out)
new->throttle_out = new->throttle_in;
run_plugin_done(p);
}
-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen)
+static void processcontrol(uint8_t * buf, int len, struct sockaddr_in *addr, int alen)
{
struct nsctl request;
struct nsctl response;
{
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
- if (!session[s].tunnel) // Not an in-use session.
+ if (!session[s].opened) // Not an in-use session.
continue;
run_plugins(PLUGIN_NEW_SESSION_MASTER, &session[s]);
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
int idle;
- if (!session[s].tunnel)
+ if (!session[s].opened)
continue;
idle = time_now - session[s].last_packet;
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
int open = 0, d;
- if (!session[s].tunnel)
+ if (!session[s].opened)
continue;
d = time_now - session[s].opened;
*
* Based on code from rp-l2tpd by Roaring Penguin Software Inc.
*/
-static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length)
+static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length)
{
MD5_CTX ctx;
- u8 *cursor;
- u8 digest[16];
- u8 working_vector[16];
+ uint8_t *cursor;
+ uint8_t digest[16];
+ uint8_t working_vector[16];
uint16_t hidden_length;
- u8 type[2];
+ uint8_t type[2];
size_t done, todo;
- u8 *output;
+ uint8_t *output;
// Find the AVP type.
type[0] = *(avp + 4);
return hidden_length + 6;
}
-static int ip_filter_port(ip_filter_portt *p, portt port)
+static int ip_filter_port(ip_filter_portt *p, uint16_t port)
{
switch (p->op)
{
return 0;
}
-static int ip_filter_flag(u8 op, u8 sflags, u8 cflags, u8 flags)
+static int ip_filter_flag(uint8_t op, uint8_t sflags, uint8_t cflags, uint8_t flags)
{
switch (op)
{
return 0;
}
-int ip_filter(u8 *buf, int len, u8 filter)
+int ip_filter(uint8_t *buf, int len, uint8_t filter)
{
- u16 frag_offset;
- u8 proto;
- ipt src_ip;
- ipt dst_ip;
- portt src_port = 0;
- portt dst_port = 0;
- u8 flags = 0;
+ uint16_t frag_offset;
+ uint8_t proto;
+ in_addr_t src_ip;
+ in_addr_t dst_ip;
+ uint16_t src_port = 0;
+ uint16_t dst_port = 0;
+ uint8_t flags = 0;
ip_filter_rulet *rule;
if (len < 20) // up to end of destination address
if ((*buf >> 4) != 4) // IPv4
return 0;
- frag_offset = ntohs(*(u16 *) (buf + 6)) & 0x1fff;
+ frag_offset = ntohs(*(uint16_t *) (buf + 6)) & 0x1fff;
proto = buf[9];
- src_ip = *(u32 *) (buf + 12);
- dst_ip = *(u32 *) (buf + 16);
+ src_ip = *(in_addr_t *) (buf + 12);
+ dst_ip = *(in_addr_t *) (buf + 16);
if (frag_offset == 0 && (proto == IPPROTO_TCP || proto == IPPROTO_UDP))
{
if (len < l + 4) // ports
return 0;
- src_port = ntohs(*(u16 *) (buf + l));
- dst_port = ntohs(*(u16 *) (buf + l + 2));
+ src_port = ntohs(*(uint16_t *) (buf + l));
+ dst_port = ntohs(*(uint16_t *) (buf + l + 2));
if (proto == IPPROTO_TCP)
{
if (len < l + 14) // flags
projects / l2tpns.git / blobdiff