1 /*- 2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id: server.c,v 1.14 1997/12/21 12:11:08 brian Exp $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/socket.h> 31 #include <netinet/in.h> 32 #include <arpa/inet.h> 33 #include <netinet/in_systm.h> 34 #include <netinet/ip.h> 35 36 #include <errno.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <sys/stat.h> 40 #include <sys/un.h> 41 #include <unistd.h> 42 43 #include "command.h" 44 #include "mbuf.h" 45 #include "log.h" 46 #include "loadalias.h" 47 #include "defs.h" 48 #include "vars.h" 49 #include "server.h" 50 #include "id.h" 51 52 int server = -1; 53 54 static struct sockaddr_un ifsun; 55 static char *rm; 56 57 int 58 ServerLocalOpen(const char *name, mode_t mask) 59 { 60 int s; 61 62 if (VarLocalAuth == LOCAL_DENY) { 63 LogPrintf(LogERROR, "Local: Can't open socket %s: No password " 64 "in ppp.secret\n", name); 65 return 1; 66 } 67 68 if (mode & MODE_INTER) { 69 LogPrintf(LogERROR, "Local: Can't open socket in interactive mode\n"); 70 return 1; 71 } 72 73 memset(&ifsun, '\0', sizeof ifsun); 74 ifsun.sun_len = strlen(name); 75 if (ifsun.sun_len > sizeof ifsun.sun_path - 1) { 76 LogPrintf(LogERROR, "Local: %s: Path too long\n", name); 77 return 2; 78 } 79 ifsun.sun_family = AF_LOCAL; 80 strcpy(ifsun.sun_path, name); 81 82 s = ID0socket(PF_LOCAL, SOCK_STREAM, 0); 83 if (s < 0) { 84 LogPrintf(LogERROR, "Local: socket: %s\n", strerror(errno)); 85 return 3; 86 } 87 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s); 88 if (mask != (mode_t)-1) 89 mask = umask(mask); 90 if (bind(s, (struct sockaddr *)&ifsun, sizeof ifsun) < 0) { 91 if (mask != (mode_t)-1) 92 umask(mask); 93 LogPrintf(LogERROR, "Local: bind: %s\n", strerror(errno)); 94 if (errno == EADDRINUSE && VarTerm) 95 fprintf(VarTerm, "Wait for a while, then try again.\n"); 96 close(s); 97 return 4; 98 } 99 if (mask != (mode_t)-1) 100 umask(mask); 101 if (listen(s, 5) != 0) { 102 LogPrintf(LogERROR, "Local: Unable to listen to socket - OS overload?\n"); 103 close(s); 104 ID0unlink(name); 105 return 5; 106 } 107 ServerClose(); 108 server = s; 109 rm = ifsun.sun_path; 110 LogPrintf(LogPHASE, "Listening at local socket %s.\n", name); 111 return 0; 112 } 113 114 int 115 ServerTcpOpen(int port) 116 { 117 struct sockaddr_in ifsin; 118 int s; 119 120 if (VarLocalAuth == LOCAL_DENY) { 121 LogPrintf(LogERROR, "Tcp: Can't open socket %d: No password " 122 "in ppp.secret\n", port); 123 return 6; 124 } 125 126 if (mode & MODE_INTER) { 127 LogPrintf(LogERROR, "Tcp: Can't open socket in interactive mode\n"); 128 return 6; 129 } 130 131 s = ID0socket(PF_INET, SOCK_STREAM, 0); 132 if (s < 0) { 133 LogPrintf(LogERROR, "Tcp: socket: %s\n", strerror(errno)); 134 return 7; 135 } 136 memset(&ifsin, '\0', sizeof ifsin); 137 ifsin.sin_family = AF_INET; 138 ifsin.sin_addr.s_addr = INADDR_ANY; 139 ifsin.sin_port = htons(port); 140 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s); 141 if (bind(s, (struct sockaddr *)&ifsin, sizeof ifsin) < 0) { 142 LogPrintf(LogERROR, "Tcp: bind: %s\n", strerror(errno)); 143 if (errno == EADDRINUSE && VarTerm) 144 fprintf(VarTerm, "Wait for a while, then try again.\n"); 145 close(s); 146 return 8; 147 } 148 if (listen(s, 5) != 0) { 149 LogPrintf(LogERROR, "Tcp: Unable to listen to socket - OS overload?\n"); 150 close(s); 151 return 9; 152 } 153 ServerClose(); 154 server = s; 155 LogPrintf(LogPHASE, "Listening at port %d.\n", port); 156 return 0; 157 } 158 159 void 160 ServerClose() 161 { 162 if (server >= 0) { 163 close(server); 164 if (rm) { 165 ID0unlink(rm); 166 rm = 0; 167 } 168 } 169 server = -1; 170 } 171