1:
2: /*
3: * iface.h
4: *
5: * Written by Archie Cobbs <archie@freebsd.org>
6: * Copyright (c) 1995-1999 Whistle Communications, Inc. All rights reserved.
7: * See ``COPYRIGHT.whistle''
8: */
9:
10: #ifndef _IFACE_H_
11: #define _IFACE_H_
12:
13: #include <sys/types.h>
14: #include <sys/time.h>
15: #include <sys/ioctl.h>
16: #include <net/if.h>
17: #include <net/if_dl.h>
18: #include <net/bpf.h>
19: #include <netinet/ip.h>
20: #include <netinet/tcp.h>
21: #include <netgraph/ng_message.h>
22: #include <netgraph/ng_ppp.h>
23: #ifdef USE_NG_BPF
24: #include <netgraph/ng_bpf.h>
25: #endif
26: #include "mbuf.h"
27: #include "timer.h"
28: #ifdef USE_NG_NAT
29: #include "nat.h"
30: #endif
31: #include "vars.h"
32:
33: /*
34: * DEFINITIONS
35: */
36:
37: #define IFACE_MAX_ROUTES 32
38: #define IFACE_MAX_SCRIPT 128
39:
40: #define IFACE_IDLE_SPLIT 4
41:
42: #define IFACE_MIN_MTU 296
43: #define IFACE_MAX_MTU 65536
44:
45: /*
46: * We are in a liberal position about MSS
47: * (RFC 879, section 7).
48: */
49: #define MAXMSS(mtu) (mtu - sizeof(struct ip) - sizeof(struct tcphdr))
50:
51: /* Configuration options */
52:
53: enum {
54: IFACE_CONF_ONDEMAND,
55: IFACE_CONF_PROXY,
56: IFACE_CONF_KEEP_TIMEOUT,
57: IFACE_CONF_TCPMSSFIX,
58: IFACE_CONF_TEE,
59: IFACE_CONF_NAT,
60: IFACE_CONF_NETFLOW_IN,
61: IFACE_CONF_NETFLOW_OUT,
62: IFACE_CONF_NETFLOW_ONCE,
63: IFACE_CONF_IPACCT
64: };
65:
66: /* Dial-on-demand packet cache */
67: struct dodcache {
68: Mbuf pkt;
69: time_t ts;
70: u_short proto;
71: };
72:
73: #define MAX_DOD_CACHE_DELAY 30
74:
75: struct ifaceconf {
76: struct u_range self_addr; /* Interface's IP address */
77: struct u_addr peer_addr; /* Peer's IP address */
78: struct u_addr self_ipv6_addr;
79: struct u_addr peer_ipv6_addr;
80: u_char self_addr_force;
81: u_char peer_addr_force;
82: u_char self_ipv6_addr_force;
83: u_char peer_ipv6_addr_force;
84: char ifname[IFNAMSIZ]; /* Name of my interface */
85: #ifdef SIOCSIFDESCR
86: char *ifdescr; /* Interface description template */
87: #endif
88: #ifdef SIOCAIFGROUP
89: char ifgroup[IFNAMSIZ]; /* Group of my interface */
90: #endif
91: };
92:
93: struct ifaceroute {
94: struct u_range dest; /* Destination of route */
95: u_char ok; /* Route installed OK */
96: SLIST_ENTRY(ifaceroute) next;
97: };
98: typedef struct ifaceroute *IfaceRoute;
99:
100: struct ifacestate {
101: char ifname[IFNAMSIZ]; /* Name of my interface */
102: char ngname[IFNAMSIZ]; /* Name of my Netgraph node */
103: uint ifindex; /* System interface index */
104: #ifdef SIOCSIFDESCR
105: char *ifdescr; /* Interface description */
106: #endif
107: struct ifaceconf conf;
108: u_char traffic[IFACE_IDLE_SPLIT]; /* Mark any traffic */
109: u_short mtu; /* Interface MTU */
110: u_short max_mtu; /* Configured maximum MTU */
111: u_short mtu_override; /* Configured MTU override */
112: struct optinfo options; /* Configuration options */
113: u_int idle_timeout; /* Idle timeout */
114: u_int session_timeout; /* Session timeout */
115: SLIST_HEAD(, ifaceroute) routes;
116: #ifdef USE_IPFW
117: struct acl *tables; /* List of IP added to tables by iface */
118: #endif
119: struct u_range self_addr; /* Interface's IP address */
120: struct u_addr peer_addr; /* Peer's IP address */
121: struct u_addr proxy_addr; /* Proxied IP address */
122: struct u_addr self_ipv6_addr;
123: struct u_addr peer_ipv6_addr;
124: struct pppTimer idleTimer; /* Idle timer */
125: struct pppTimer sessionTimer; /* Session timer */
126: char up_script[IFACE_MAX_SCRIPT];
127: char down_script[IFACE_MAX_SCRIPT];
128: #ifdef USE_NG_BPF
129: ng_ID_t limitID; /* ID of limit (bpf) node */
130: SLIST_HEAD(, svcs) ss[ACL_DIRS]; /* Where to get service stats */
131: struct svcstat prevstats; /* Stats from gone layers */
132: #endif
133: time_t last_up; /* Time this iface last got up */
134: u_char open:1; /* In an open state */
135: u_char dod:1; /* Interface flagged -link0 */
136: u_char up:1; /* interface is up */
137: u_char ip_up:1; /* IP interface is up */
138: u_char ipv6_up:1; /* IPv6 interface is up */
139: u_char nat_up:1; /* NAT is up */
140: u_char tee_up:1; /* TEE is up */
141: u_char tee6_up:1; /* TEE6 is up */
142: u_char nfin_up:1; /* NFIN is up */
143: u_char nfout_up:1; /* NFOUT is up */
144: u_char mss_up:1; /* MSS is up */
145: u_char ipacct_up:1; /* IPACCT is up */
146:
147: struct dodcache dodCache; /* Dial-on-demand cache */
148:
149: #ifdef USE_NG_NAT
150: struct natstate nat; /* NAT config */
151: #endif
152:
153: struct ng_ppp_link_stat64 idleStats; /* Statistics for idle timeout */
154: };
155: typedef struct ifacestate *IfaceState;
156:
157: #ifdef USE_IPFW
158: struct acl_pool { /* Pool of used ACL numbers */
159: char ifname[IFNAMSIZ]; /* Name of interface */
160: unsigned short acl_number; /* ACL number given by RADIUS unique on this interface */
161: unsigned short real_number; /* Real ACL number unique on this system */
162: struct acl_pool *next;
163: };
164: #endif
165:
166: /*
167: * VARIABLES
168: */
169:
170: extern const struct cmdtab IfaceSetCmds[];
171:
172: #ifdef USE_IPFW
173: extern struct acl_pool * rule_pool; /* Pointer to the first element in the list of rules */
174: extern struct acl_pool * pipe_pool; /* Pointer to the first element in the list of pipes */
175: extern struct acl_pool * queue_pool; /* Pointer to the first element in the list of queues */
176: extern struct acl_pool * table_pool; /* Pointer to the first element in the list of tables */
177: extern int rule_pool_start; /* Initial number of ipfw rules pool */
178: extern int pipe_pool_start; /* Initial number of ipfw dummynet pipe pool */
179: extern int queue_pool_start; /* Initial number of ipfw dummynet queue pool */
180: extern int table_pool_start; /* Initial number of ipfw tables pool */
181: #endif
182:
183: /*
184: * FUNCTIONS
185: */
186:
187: extern void IfaceInit(Bund b);
188: extern void IfaceInst(Bund b, Bund bt);
189: extern void IfaceDestroy(Bund b);
190: extern void IfaceOpen(Bund b);
191: extern void IfaceClose(Bund b);
192: extern int IfaceOpenCmd(Context ctx);
193: extern int IfaceCloseCmd(Context ctx);
194: extern int IfaceIpIfaceUp(Bund b, int ready);
195: extern void IfaceIpIfaceDown(Bund b);
196: extern int IfaceIpv6IfaceUp(Bund b, int ready);
197: extern void IfaceIpv6IfaceDown(Bund b);
198: extern void IfaceUp(Bund b, int ready);
199: extern void IfaceDown(Bund b);
200: extern int IfaceStat(Context ctx, int ac, const char *const av[], const void *arg);
201:
202: extern void IfaceListenInput(Bund b, int proto, Mbuf pkt);
203: #ifndef USE_NG_TCPMSS
204: extern void IfaceCorrectMSS(Mbuf pkt, uint16_t maxmss);
205: #endif
206: extern void IfaceSetMTU(Bund b, int mtu);
207: extern void IfaceChangeFlags(Bund b, int clear, int set);
208: extern int IfaceChangeAddr(Bund b, int add, struct u_range *self, struct u_addr *peer);
209: extern int IfaceSetRoute(Bund b, int cmd, struct u_range *dst, struct u_addr *gw);
210:
211: #ifdef USE_NG_BPF
212: extern void IfaceGetStats(Bund b, struct svcstat *stat);
213: extern void IfaceAddStats(struct svcstat *stat1, struct svcstat *stat2);
214: extern void IfaceFreeStats(struct svcstat *stat);
215: #endif
216:
217: #endif
218:
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