// L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.37 2004/11/25 12:41:35 bodea Exp $
+// $Id: l2tpns.h,v 1.41 2004/11/29 02:17:17 bodea Exp $
#ifndef __L2TPNS_H__
#define __L2TPNS_H__
u16 snoop_port;
int throttle_in;
int throttle_out;
+ int filter_in;
+ int filter_out;
};
#define CLI_SESS_KILL 0x01
#define CLI_SESS_NOSNOOP 0x04
#define CLI_SESS_THROTTLE 0x08
#define CLI_SESS_NOTHROTTLE 0x10
+#define CLI_SESS_FILTER 0x20
+#define CLI_SESS_NOFILTER 0x40
struct cli_tunnel_actions {
char action;
#define DUMP_MAGIC "L2TPNS#" VERSION "#"
// structures
-typedef struct routes // route
+typedef struct // route
{
ipt ip;
ipt mask;
}
controlt;
-typedef struct sessions
+typedef struct
{
sessionidt next; // next session in linked list
sessionidt far; // far end session ID
ipt snoop_ip; // Interception destination IP
u16 snoop_port; // Interception destination port
u16 sid; // near end session id.
- char reserved[20]; // Space to expand structure without changing HB_VERSION
+ u8 filter_in; // input filter index (to ip_filters[N-1]; 0 if none)
+ u8 filter_out; // output filter index
+ char reserved[18]; // Space to expand structure without changing HB_VERSION
}
sessiont;
#define SF_LCP_ACKED 2 // LCP negotiated
#define SF_CCP_ACKED 4 // CCP negotiated
-typedef struct {
+typedef struct
+{
u32 cin;
u32 cout;
} sessioncountt;
#define SESSIONACFC 2 // ACFC negotiated flags
// 168 bytes per tunnel
-typedef struct tunnels
+typedef struct
{
tunnelidt far; // far end tunnel ID
ipt ip; // Ip for far end
tunnelt;
// 180 bytes per radius session
-typedef struct radiuss // outstanding RADIUS requests
+typedef struct // outstanding RADIUS requests
{
sessionidt session; // which session this applies to
hasht auth; // request authenticator
char level;
sessionidt session;
tunnelidt tunnel;
- ipt address;
char message[MAX_LOG_LENGTH];
} buffer[RINGBUFFER_SIZE];
int head;
#define SET_STAT(x, y)
#endif
-struct configt
+typedef struct
{
int debug; // debugging level
time_t start_time; // time when l2tpns was started
int hold;
} neighbour[BGP_NUM_PEERS];
#endif
-};
+} configt;
enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC };
-struct config_descriptt
+typedef struct
{
char *key;
int offset;
int size;
enum config_typet type;
-};
+} config_descriptt;
+
+typedef struct
+{
+ u8 op; // operation
+#define FILTER_PORT_OP_NONE 0 // all ports match
+#define FILTER_PORT_OP_EQ 1
+#define FILTER_PORT_OP_NEQ 2
+#define FILTER_PORT_OP_GT 3
+#define FILTER_PORT_OP_LT 4
+#define FILTER_PORT_OP_RANGE 5
+ portt port; // port (host byte order)
+ portt port2; // range
+} ip_filter_portt;
+
+typedef struct
+{
+ int action; // permit/deny
+#define FILTER_ACTION_DENY 1
+#define FILTER_ACTION_PERMIT 2
+ u8 proto; // protocol: IPPROTO_* (netinet/in.h)
+ ipt src_ip; // source ip (network byte order)
+ ipt src_wild;
+ ip_filter_portt src_ports;
+ ipt dst_ip; // dest ip
+ ipt dst_wild;
+ ip_filter_portt dst_ports;
+ u8 frag; // apply to non-initial fragments
+ u8 tcp_flag_op; // match type: any, all, established
+#define FILTER_FLAG_OP_ANY 1
+#define FILTER_FLAG_OP_ALL 2
+#define FILTER_FLAG_OP_EST 3
+ u8 tcp_sflags; // flags set
+ u8 tcp_cflags; // flags clear
+ u32 counter; // match count
+} ip_filter_rulet;
+
+#define TCP_FLAG_FIN 0x01
+#define TCP_FLAG_SYN 0x02
+#define TCP_FLAG_RST 0x04
+#define TCP_FLAG_PSH 0x08
+#define TCP_FLAG_ACK 0x10
+#define TCP_FLAG_URG 0x20
+
+#define MAXFILTER 32
+#define MAXFILTER_RULES 32
+typedef struct
+{
+ char name[32]; // ACL name
+ int extended; // type: 0 = standard, 1 = extended
+ ip_filter_rulet rules[MAXFILTER_RULES];
+ int used; // session ref count
+} ip_filtert;
// arp.c
void sendarp(int ifr_idx, const unsigned char* mac, ipt ip);
void sendipcp(tunnelidt t, sessionidt s);
void processudp(u8 * buf, int len, struct sockaddr_in *addr);
void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port);
+int ip_filter(u8 *buf, int len, u8 filter);
int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc);
int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc);
int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc);
#undef LOG
#undef LOG_HEX
-#define LOG(D, a, s, t, f, ...) ({ if (D <= config->debug) _log(D, a, s, t, f, ## __VA_ARGS__); })
+#define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
#define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); })
-void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 5, 6)));
+void _log(int level, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 4, 5)));
void _log_hex(int level, const char *title, const char *data, int maxsize);
int sessionsetup(tunnelidt t, sessionidt s);
void *array[20]; \
char **strings; \
int size, i; \
- LOG(0, 0, 0, t, "Backtrace follows"); \
+ LOG(0, 0, t, "Backtrace follows"); \
size = backtrace(array, 10); \
strings = backtrace_symbols(array, size); \
if (strings) for (i = 0; i < size; i++) \
{ \
- LOG(0, 0, 0, t, "%s\n", strings[i]); \
+ LOG(0, 0, t, "%s\n", strings[i]); \
} \
free(strings); \
}
-extern struct configt *config;
+extern configt *config;
extern time_t basetime; // Time when this process started.
extern time_t time_now; // Seconds since EPOCH.
extern u32 last_id;
projects / l2tpns.git / blobdiff