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Comparing gvpe/src/util.h (file contents):
Revision 1.2 by pcg, Mon Mar 17 15:20:18 2003 UTC vs.
Revision 1.5 by pcg, Wed Apr 2 03:06:22 2003 UTC

… …
20*/ 20*/
21 21
22#ifndef UTIL_H__ 22#ifndef UTIL_H__
23#define UTIL_H__ 23#define UTIL_H__
24 24
25#include <sys/socket.h> 25#include "iom.h"
26#include <netinet/in.h>
27
28#include <map>
29
30#include "device.h" 26#include "device.h"
31
32#define SOCKADDR sockaddr_in // this is lame, I know
33 27
34/* 28/*
35 * check for an existing vped for this net, and write pid to pidfile 29 * check for an existing vped for this net, and write pid to pidfile
36 */ 30 */
37extern int write_pidfile (void); 31extern int write_pidfile (void);
… …
69 p[5] = id; 63 p[5] = id;
70} 64}
71 65
72#define mac2id(p) (p[0] & 0x01 ? 0 : (p[4] << 8) | p[5]) 66#define mac2id(p) (p[0] & 0x01 ? 0 : (p[4] << 8) | p[5])
73 67
74// a very simple fifo pkt-queue
75class pkt_queue
76 {
77 tap_packet *queue[QUEUEDEPTH];
78 int i, j;
79
80 public:
81
82 void put (tap_packet *p);
83 tap_packet *get ();
84
85 pkt_queue ();
86 ~pkt_queue ();
87 };
88
89struct sockinfo
90 {
91 u32 host;
92 u16 port;
93
94 void set (const SOCKADDR *sa)
95 {
96 host = sa->sin_addr.s_addr;
97 port = sa->sin_port;
98 }
99
100 sockinfo()
101 {
102 host = port = 0;
103 }
104
105 sockinfo(const SOCKADDR &sa)
106 {
107 set (&sa);
108 }
109
110 sockinfo(const SOCKADDR *sa)
111 {
112 set (sa);
113 }
114
115 SOCKADDR *sa()
116 {
117 static SOCKADDR sa;
118
119 sa.sin_family = AF_INET;
120 sa.sin_port = port;
121 sa.sin_addr.s_addr = host;
122
123 return &sa;
124 }
125
126 operator const char *();
127 };
128
129inline bool
130operator == (const sockinfo &a, const sockinfo &b)
131{
132 return a.host == b.host && a.port == b.port;
133}
134
135inline bool
136operator < (const sockinfo &a, const sockinfo &b)
137{
138 return a.host < b.host
139 || (a.host == b.host && a.port < b.port);
140}
141
142// only do action once every x seconds per host.
143// currently this is quite a slow implementation,
144// but suffices for normal operation.
145struct u32_rate_limiter : private map<u32, time_t>
146 {
147 int every;
148
149 bool can (u32 host);
150
151 u32_rate_limiter (time_t every = 1)
152 {
153 this->every = every;
154 }
155 };
156
157struct net_rate_limiter : u32_rate_limiter
158 {
159 bool can (SOCKADDR *sa) { return u32_rate_limiter::can((u32)sa->sin_addr.s_addr); }
160 bool can (sockinfo &si) { return u32_rate_limiter::can((u32)si.host); }
161
162 net_rate_limiter (time_t every) : u32_rate_limiter (every) {}
163 };
164
165struct sliding_window { 68struct sliding_window {
166 u32 v[(WINDOWSIZE + 31) / 32]; 69 u32 v[(WINDOWSIZE + 31) / 32];
167 u32 seq; 70 u32 seq;
168 71
169 void reset (u32 seqno) 72 void reset (u32 seqno)
… …
195 98
196 u32 s = seqno % WINDOWSIZE; 99 u32 s = seqno % WINDOWSIZE;
197 u32 *cell = v + (s >> 5); 100 u32 *cell = v + (s >> 5);
198 u32 mask = 1 << (s & 31); 101 u32 mask = 1 << (s & 31);
199 102
200 //printf ("received seqno %08lx, seq %08lx, mask %08lx is %08lx\n", seqno, seq, mask, ismask);
201 if (*cell & mask) 103 if (*cell & mask)
202 { 104 {
203 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n" 105 slog (L_ERR, _("received duplicate packet (received %08lx, expected %08lx)\n"
204 "possible replay attack, or just packet duplication"), seqno, seq + 1);//D 106 "possible replay attack, or just packet duplication"), seqno, seq + 1);//D
205 return false; 107 return false;
… …
211 } 113 }
212 } 114 }
213 } 115 }
214}; 116};
215 117
118typedef callback<const char *, int> run_script_cb;
119
120// run a shell script (or actually an external program).
121void run_script (const run_script_cb &cb, bool wait);
122
216#endif 123#endif
217 124

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