1 /* 2 * Copyright (c) 1999-2003 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 #pragma ident "%Z%%M% %I% %E% SMI" 12 13 #include <sm/gen.h> 14 SM_RCSID("@(#)$Id: main.c,v 8.79 2003/10/20 22:25:09 ca Exp $") 15 16 #define _DEFINE 1 17 #include "libmilter.h" 18 #include <fcntl.h> 19 #include <sys/stat.h> 20 21 22 static smfiDesc_ptr smfi = NULL; 23 24 /* 25 ** SMFI_REGISTER -- register a filter description 26 ** 27 ** Parameters: 28 ** smfilter -- description of filter to register 29 ** 30 ** Returns: 31 ** MI_SUCCESS/MI_FAILURE 32 */ 33 34 int 35 smfi_register(smfilter) 36 smfiDesc_str smfilter; 37 { 38 size_t len; 39 40 if (smfi == NULL) 41 { 42 smfi = (smfiDesc_ptr) malloc(sizeof *smfi); 43 if (smfi == NULL) 44 return MI_FAILURE; 45 } 46 (void) memcpy(smfi, &smfilter, sizeof *smfi); 47 if (smfilter.xxfi_name == NULL) 48 smfilter.xxfi_name = "Unknown"; 49 50 len = strlen(smfilter.xxfi_name) + 1; 51 smfi->xxfi_name = (char *) malloc(len); 52 if (smfi->xxfi_name == NULL) 53 return MI_FAILURE; 54 (void) sm_strlcpy(smfi->xxfi_name, smfilter.xxfi_name, len); 55 56 /* compare milter version with hard coded version */ 57 if (smfi->xxfi_version != SMFI_VERSION) 58 { 59 /* hard failure for now! */ 60 smi_log(SMI_LOG_ERR, 61 "%s: smfi_register: version mismatch application: %d != milter: %d", 62 smfi->xxfi_name, smfi->xxfi_version, 63 (int) SMFI_VERSION); 64 65 /* XXX how about smfi? */ 66 free(smfi->xxfi_name); 67 return MI_FAILURE; 68 } 69 70 return MI_SUCCESS; 71 } 72 73 /* 74 ** SMFI_STOP -- stop milter 75 ** 76 ** Parameters: 77 ** none. 78 ** 79 ** Returns: 80 ** success. 81 */ 82 83 int 84 smfi_stop() 85 { 86 mi_stop_milters(MILTER_STOP); 87 return MI_SUCCESS; 88 } 89 90 /* 91 ** Default values for some variables. 92 ** Most of these can be changed with the functions below. 93 */ 94 95 static int dbg = 0; 96 static char *conn = NULL; 97 static int timeout = MI_TIMEOUT; 98 static int backlog = MI_SOMAXCONN; 99 100 /* 101 ** SMFI_OPENSOCKET -- try the socket setup to make sure we'll be 102 ** able to start up 103 ** 104 ** Parameters: 105 ** rmsocket -- if true, instructs libmilter to attempt 106 ** to remove the socket before creating it; 107 ** only applies for "local:" or "unix:" sockets 108 ** 109 ** Return: 110 ** MI_SUCCESS/MI_FAILURE 111 */ 112 113 int 114 smfi_opensocket(rmsocket) 115 bool rmsocket; 116 { 117 if (smfi == NULL || conn == NULL) 118 return MI_FAILURE; 119 120 return mi_opensocket(conn, backlog, dbg, rmsocket, smfi); 121 } 122 123 /* 124 ** SMFI_SETDBG -- set debug level. 125 ** 126 ** Parameters: 127 ** odbg -- new debug level. 128 ** 129 ** Returns: 130 ** MI_SUCCESS 131 */ 132 133 int 134 smfi_setdbg(odbg) 135 int odbg; 136 { 137 dbg = odbg; 138 return MI_SUCCESS; 139 } 140 141 /* 142 ** SMFI_SETTIMEOUT -- set timeout (for read/write). 143 ** 144 ** Parameters: 145 ** otimeout -- new timeout. 146 ** 147 ** Returns: 148 ** MI_SUCCESS 149 */ 150 151 int 152 smfi_settimeout(otimeout) 153 int otimeout; 154 { 155 timeout = otimeout; 156 return MI_SUCCESS; 157 } 158 159 /* 160 ** SMFI_SETCONN -- set connection information (socket description) 161 ** 162 ** Parameters: 163 ** oconn -- new connection information. 164 ** 165 ** Returns: 166 ** MI_SUCCESS/MI_FAILURE 167 */ 168 169 int 170 smfi_setconn(oconn) 171 char *oconn; 172 { 173 size_t l; 174 175 if (oconn == NULL || *oconn == '\0') 176 return MI_FAILURE; 177 l = strlen(oconn) + 1; 178 if ((conn = (char *) malloc(l)) == NULL) 179 return MI_FAILURE; 180 if (sm_strlcpy(conn, oconn, l) >= l) 181 return MI_FAILURE; 182 return MI_SUCCESS; 183 } 184 185 /* 186 ** SMFI_SETBACKLOG -- set backlog 187 ** 188 ** Parameters: 189 ** obacklog -- new backlog. 190 ** 191 ** Returns: 192 ** MI_SUCCESS/MI_FAILURE 193 */ 194 195 int 196 smfi_setbacklog(obacklog) 197 int obacklog; 198 { 199 if (obacklog <= 0) 200 return MI_FAILURE; 201 backlog = obacklog; 202 return MI_SUCCESS; 203 } 204 205 206 /* 207 ** SMFI_MAIN -- setup milter connnection and start listener. 208 ** 209 ** Parameters: 210 ** none. 211 ** 212 ** Returns: 213 ** MI_SUCCESS/MI_FAILURE 214 */ 215 216 int 217 smfi_main() 218 { 219 int r; 220 221 (void) signal(SIGPIPE, SIG_IGN); 222 if (conn == NULL) 223 { 224 smi_log(SMI_LOG_FATAL, "%s: missing connection information", 225 smfi->xxfi_name); 226 return MI_FAILURE; 227 } 228 229 (void) atexit(mi_clean_signals); 230 if (mi_control_startup(smfi->xxfi_name) != MI_SUCCESS) 231 { 232 smi_log(SMI_LOG_FATAL, 233 "%s: Couldn't start signal thread", 234 smfi->xxfi_name); 235 return MI_FAILURE; 236 } 237 r = MI_SUCCESS; 238 239 /* Startup the listener */ 240 if (mi_listener(conn, dbg, smfi, timeout, backlog) != MI_SUCCESS) 241 r = MI_FAILURE; 242 243 return r; 244 } 245 246