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1  /* $USAGI: ninfod.h,v 1.20 2002-12-19 15:51:16 yoshfuji Exp $ */
2  /*
3   * Copyright (C) 2002 USAGI/WIDE Project.
4   * All rights reserved.
5   *
6   * Redistribution and use in source and binary forms, with or without
7   * modification, are permitted provided that the following conditions
8   * are met:
9   * 1. Redistributions of source code must retain the above copyright
10   *    notice, this list of conditions and the following disclaimer.
11   * 2. Redistributions in binary form must reproduce the above copyright
12   *    notice, this list of conditions and the following disclaimer in the
13   *    documentation and/or other materials provided with the distribution.
14   * 3. Neither the name of the project nor the names of its contributors
15   *    may be used to endorse or promote products derived from this software
16   *    without specific prior written permission.
17   *
18   * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
19   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21   * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
22   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28   * SUCH DAMAGE.
29   */
30  /*
31   * Author:
32   * 	YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
33   */
34  
35  /* definitions */
36  #define NINFOD			"ninfod"
37  #define NINFOD_PIDFILE		"/var/run/ninfod.pid"
38  
39  #define	MAX_ANYCAST_DELAY_TIME	1000000.0	/* 1 sec */
40  
41  #define MAX_DNSLABEL_SIZE	63
42  #define MAX_DNSNAME_SIZE	255
43  #define MAX_QUERY_SIZE		(sizeof(struct icmp6_nodeinfo)+MAX_DNSNAME_SIZE+2)
44  #define MAX_REPLY_SIZE		1280-sizeof(struct ip6_hdr)
45  
46  #define MAX_SUPTYPES		32
47  
48  #define CHECKANDFILL_ARGS	struct packetcontext *p,\
49  				char *subject, size_t subjlen,	\
50  				unsigned int flags,		\
51  				unsigned int *subj_if,		\
52  				int reply
53  #define INIT_ARGS		\
54  				int forced
55  
56  struct packetcontext {
57  	/* socket */
58  	int sock;
59  
60  	/* query info */
61  	struct sockaddr_storage addr;
62  	socklen_t addrlen;
63  	struct in6_pktinfo pktinfo;
64  	char query[MAX_QUERY_SIZE];
65  	int querylen;
66  
67  	/* reply info */
68  	struct icmp6_nodeinfo reply;	/* common */
69  	char *replydata;		/* data */
70  	int replydatalen;
71  
72  	unsigned int delay;		/* (random) delay */
73  };
74  
75  /* variables */
76  extern int opt_v;		/* ninfod.c */
77  extern int daemonized;		/* ninfod.c */
78  extern int sock;		/* ninfod.c */
79  extern int initialized;		/* ninfod_core.c */
80  
81  /* ninfod.c* */
82  int ni_recv(struct packetcontext *p);
83  int ni_send(struct packetcontext *p);
84  
85  /* ninfod_core.c */
86  #if ENABLE_DEBUG
87  void stderrlog(int priority, char *format, ...);
88  # define DEBUG(pri, fmt, args...)	do {									\
89  						int saved_errno = errno;					\
90  						if (opt_v || pri != LOG_DEBUG) {				\
91  							if (daemonized) {					\
92  								syslog(pri, fmt, ## args);			\
93  							} else {						\
94  								stderrlog(pri, fmt, ## args);			\
95  							}							\
96  						}								\
97  						errno = saved_errno;						\
98  					} while(0)
99  #else
100  # define DEBUG(pri, fmt, args...)	do { ; } while(0)
101  #endif
102  
103  #define ni_malloc(size)	({										\
104  				size_t _size = (size);							\
105  				void *p = malloc(_size);						\
106  				DEBUG(LOG_DEBUG, "%s(): malloc(%zu) = %p\n", __func__, _size, p);	\
107  				p;									\
108  			})
109  #define ni_free(p)	({										\
110  				void *_p = (p);								\
111  				int saved_errno = errno;						\
112  				DEBUG(LOG_DEBUG, "%s(): free(%p)\n", __func__, _p);			\
113  				free(_p);								\
114  				errno = saved_errno;							\
115  			})
116  
117  void init_core(int forced);
118  int pr_nodeinfo(struct packetcontext *p);
119  
120  int pr_nodeinfo_unknown(CHECKANDFILL_ARGS);
121  int pr_nodeinfo_refused(CHECKANDFILL_ARGS);
122  int pr_nodeinfo_noop(CHECKANDFILL_ARGS);
123  void init_nodeinfo_suptypes(INIT_ARGS);
124  int pr_nodeinfo_suptypes(CHECKANDFILL_ARGS);
125  
126  /* ninfod_addrs.c */
127  void init_nodeinfo_ipv6addr(INIT_ARGS);
128  int pr_nodeinfo_ipv6addr(CHECKANDFILL_ARGS);
129  void init_nodeinfo_ipv4addr(INIT_ARGS);
130  int pr_nodeinfo_ipv4addr(CHECKANDFILL_ARGS);
131  
132  /* ninfod_name.c */
133  int check_nigroup(const struct in6_addr *addr);
134  void init_nodeinfo_nodename(INIT_ARGS);
135  int pr_nodeinfo_nodename(CHECKANDFILL_ARGS);
136  
137