main.c revision 90792 
1/*
2 *  Copyright (c) 1999-2001 Sendmail, Inc. and its suppliers.
3 *	All rights reserved.
4 *
5 * By using this file, you agree to the terms and conditions set
6 * forth in the LICENSE file which can be found at the top level of
7 * the sendmail distribution.
8 *
9 */
10
11#include <sm/gen.h>
12SM_RCSID("@(#)$Id: main.c,v 8.53 2001/11/29 02:21:02 ca Exp $")
13
14#define _DEFINE	1
15#include "libmilter.h"
16#include <fcntl.h>
17#include <sys/stat.h>
18
19
20static smfiDesc_ptr smfi = NULL;
21
22/*
23**  SMFI_REGISTER -- register a filter description
24**
25**	Parameters:
26**		smfilter -- description of filter to register
27**
28**	Returns:
29**		MI_SUCCESS/MI_FAILURE
30*/
31
32int
33smfi_register(smfilter)
34	smfiDesc_str smfilter;
35{
36	size_t len;
37
38	if (smfi == NULL)
39	{
40		smfi = (smfiDesc_ptr) malloc(sizeof *smfi);
41		if (smfi == NULL)
42			return MI_FAILURE;
43	}
44	(void) memcpy(smfi, &smfilter, sizeof *smfi);
45	if (smfilter.xxfi_name == NULL)
46		smfilter.xxfi_name = "Unknown";
47
48	len = strlen(smfilter.xxfi_name) + 1;
49	smfi->xxfi_name = (char *) malloc(len);
50	if (smfi->xxfi_name == NULL)
51		return MI_FAILURE;
52	(void) sm_strlcpy(smfi->xxfi_name, smfilter.xxfi_name, len);
53
54	/* compare milter version with hard coded version */
55	if (smfi->xxfi_version != SMFI_VERSION)
56	{
57		/* hard failure for now! */
58		smi_log(SMI_LOG_ERR,
59			"%s: smfi_register: version mismatch application: %d != milter: %d",
60			smfi->xxfi_name, smfi->xxfi_version,
61			(int) SMFI_VERSION);
62
63		/* XXX how about smfi? */
64		free(smfi->xxfi_name);
65		return MI_FAILURE;
66	}
67
68	return MI_SUCCESS;
69}
70
71/*
72**  SMFI_STOP -- stop milter
73**
74**	Parameters:
75**		none.
76**
77**	Returns:
78**		success.
79*/
80
81int
82smfi_stop()
83{
84	mi_stop_milters(MILTER_STOP);
85	return MI_SUCCESS;
86}
87
88/*
89**  default values for some variables.
90**	Most of these can be changed with the functions below.
91*/
92
93static int dbg = 0;
94static char *conn = NULL;
95static int timeout = MI_TIMEOUT;
96static int backlog= MI_SOMAXCONN;
97
98/*
99**  SMFI_SETDBG -- set debug level.
100**
101**	Parameters:
102**		odbg -- new debug level.
103**
104**	Returns:
105**		MI_SUCCESS
106*/
107
108int
109smfi_setdbg(odbg)
110	int odbg;
111{
112	dbg = odbg;
113	return MI_SUCCESS;
114}
115
116/*
117**  SMFI_SETTIMEOUT -- set timeout (for read/write).
118**
119**	Parameters:
120**		otimeout -- new timeout.
121**
122**	Returns:
123**		MI_SUCCESS
124*/
125
126int
127smfi_settimeout(otimeout)
128	int otimeout;
129{
130	timeout = otimeout;
131	return MI_SUCCESS;
132}
133
134/*
135**  SMFI_SETCONN -- set connection information (socket description)
136**
137**	Parameters:
138**		oconn -- new connection information.
139**
140**	Returns:
141**		MI_SUCCESS/MI_FAILURE
142*/
143
144int
145smfi_setconn(oconn)
146	char *oconn;
147{
148	size_t l;
149
150	if (oconn == NULL || *oconn == '\0')
151		return MI_FAILURE;
152	l = strlen(oconn) + 1;
153	if ((conn = (char *) malloc(l)) == NULL)
154		return MI_FAILURE;
155	if (sm_strlcpy(conn, oconn, l) >= l)
156		return MI_FAILURE;
157	return MI_SUCCESS;
158}
159
160/*
161**  SMFI_SETBACKLOG -- set backlog
162**
163**	Parameters:
164**		odbg -- new backlog.
165**
166**	Returns:
167**		MI_SUCCESS/MI_FAILURE
168*/
169
170int
171smfi_setbacklog(obacklog)
172	int obacklog;
173{
174	if (obacklog <= 0)
175		return MI_FAILURE;
176	backlog = obacklog;
177	return MI_SUCCESS;
178}
179
180
181/*
182**  SMFI_MAIN -- setup milter connnection and start listener.
183**
184**	Parameters:
185**		none.
186**
187**	Returns:
188**		MI_SUCCESS/MI_FAILURE
189*/
190
191int
192smfi_main()
193{
194	int r;
195
196	(void) signal(SIGPIPE, SIG_IGN);
197	if (conn == NULL)
198	{
199		smi_log(SMI_LOG_FATAL, "%s: missing connection information",
200			smfi->xxfi_name);
201		return MI_FAILURE;
202	}
203
204	(void) atexit(mi_clean_signals);
205	if (mi_control_startup(smfi->xxfi_name) != MI_SUCCESS)
206	{
207		smi_log(SMI_LOG_FATAL,
208			"%s: Couldn't start signal thread",
209			smfi->xxfi_name);
210		return MI_FAILURE;
211	}
212	r = MI_SUCCESS;
213
214	/* Startup the listener */
215	if (mi_listener(conn, dbg, smfi, timeout, backlog) != MI_SUCCESS)
216		r = MI_FAILURE;
217
218	return r;
219}
220