dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008, 2010 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * |
| 5 | * This software is distributed under the terms of the GNU Affero Public License. |
| 6 | * See the COPYING file in the main directory for details. |
| 7 | * |
| 8 | * This use of this software may be subject to additional restrictions. |
| 9 | * See the LEGAL file in the main directory for details. |
| 10 | |
| 11 | This program is free software: you can redistribute it and/or modify |
| 12 | it under the terms of the GNU Affero General Public License as published by |
| 13 | the Free Software Foundation, either version 3 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU Affero General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU Affero General Public License |
| 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 23 | |
| 24 | */ |
| 25 | |
| 26 | |
| 27 | |
kurtis.heimerl | 0775c80 | 2012-12-17 11:22:04 +0000 | [diff] [blame] | 28 | #include <config.h> |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 29 | #include <unistd.h> |
| 30 | #include <fcntl.h> |
| 31 | #include <cstdio> |
| 32 | #include <sys/select.h> |
| 33 | |
| 34 | #include "Threads.h" |
| 35 | #include "Sockets.h" |
| 36 | #include <stdio.h> |
| 37 | #include <unistd.h> |
| 38 | #include <fcntl.h> |
| 39 | |
| 40 | #include <string.h> |
| 41 | #include <stdlib.h> |
| 42 | |
| 43 | |
kurtis.heimerl | 5a87247 | 2013-05-31 21:47:25 +0000 | [diff] [blame] | 44 | |
| 45 | |
| 46 | |
| 47 | |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 48 | bool resolveAddress(struct sockaddr_in *address, const char *hostAndPort) |
| 49 | { |
| 50 | assert(address); |
| 51 | assert(hostAndPort); |
| 52 | char *copy = strdup(hostAndPort); |
| 53 | char *colon = strchr(copy,':'); |
| 54 | if (!colon) return false; |
| 55 | *colon = '\0'; |
| 56 | char *host = copy; |
| 57 | unsigned port = strtol(colon+1,NULL,10); |
| 58 | bool retVal = resolveAddress(address,host,port); |
| 59 | free(copy); |
| 60 | return retVal; |
| 61 | } |
| 62 | |
| 63 | bool resolveAddress(struct sockaddr_in *address, const char *host, unsigned short port) |
| 64 | { |
| 65 | assert(address); |
| 66 | assert(host); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 67 | // FIXME -- Need to ignore leading/trailing spaces in hostname. |
kurtis.heimerl | 0775c80 | 2012-12-17 11:22:04 +0000 | [diff] [blame] | 68 | struct hostent *hp; |
| 69 | int h_errno_local; |
| 70 | #ifdef HAVE_GETHOSTBYNAME2_R |
| 71 | struct hostent hostData; |
| 72 | char tmpBuffer[2048]; |
| 73 | |
| 74 | // There are different flavors of gethostbyname_r(), but |
| 75 | // latest Linux use the following form: |
| 76 | if (gethostbyname2_r(host, AF_INET, &hostData, tmpBuffer, sizeof(tmpBuffer), &hp, &h_errno_local)!=0) { |
| 77 | CERR("WARNING -- gethostbyname2_r() failed for " << host << ", " << hstrerror(h_errno_local)); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 78 | return false; |
| 79 | } |
kurtis.heimerl | 0775c80 | 2012-12-17 11:22:04 +0000 | [diff] [blame] | 80 | #else |
| 81 | static Mutex sGethostbynameMutex; |
| 82 | // gethostbyname() is NOT thread-safe, so we should use a mutex here. |
| 83 | // Ideally it should be a global mutex for all non thread-safe socket |
| 84 | // operations and it should protect access to variables such as |
| 85 | // global h_errno. |
| 86 | sGethostbynameMutex.lock(); |
| 87 | hp = gethostbyname(host); |
| 88 | h_errno_local = h_errno; |
| 89 | sGethostbynameMutex.unlock(); |
| 90 | #endif |
| 91 | if (hp==NULL) { |
| 92 | CERR("WARNING -- gethostbyname() failed for " << host << ", " << hstrerror(h_errno_local)); |
| 93 | return false; |
| 94 | } |
| 95 | if (hp->h_addrtype != AF_INET) { |
| 96 | CERR("WARNING -- gethostbyname() resolved " << host << " to something other then AF_INET"); |
| 97 | return false; |
| 98 | } |
| 99 | address->sin_family = hp->h_addrtype; |
| 100 | assert(sizeof(address->sin_addr) == hp->h_length); |
| 101 | memcpy(&(address->sin_addr), hp->h_addr_list[0], hp->h_length); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 102 | address->sin_port = htons(port); |
| 103 | return true; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | |
| 108 | DatagramSocket::DatagramSocket() |
| 109 | { |
kurtis.heimerl | 0775c80 | 2012-12-17 11:22:04 +0000 | [diff] [blame] | 110 | memset(mDestination, 0, sizeof(mDestination)); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | |
| 114 | |
| 115 | |
| 116 | |
| 117 | void DatagramSocket::nonblocking() |
| 118 | { |
| 119 | fcntl(mSocketFD,F_SETFL,O_NONBLOCK); |
| 120 | } |
| 121 | |
| 122 | void DatagramSocket::blocking() |
| 123 | { |
| 124 | fcntl(mSocketFD,F_SETFL,0); |
| 125 | } |
| 126 | |
| 127 | void DatagramSocket::close() |
| 128 | { |
| 129 | ::close(mSocketFD); |
| 130 | } |
| 131 | |
| 132 | |
| 133 | DatagramSocket::~DatagramSocket() |
| 134 | { |
| 135 | close(); |
| 136 | } |
| 137 | |
| 138 | |
| 139 | |
| 140 | |
| 141 | |
| 142 | int DatagramSocket::write( const char * message, size_t length ) |
| 143 | { |
| 144 | assert(length<=MAX_UDP_LENGTH); |
| 145 | int retVal = sendto(mSocketFD, message, length, 0, |
| 146 | (struct sockaddr *)mDestination, addressSize()); |
| 147 | if (retVal == -1 ) perror("DatagramSocket::write() failed"); |
| 148 | return retVal; |
| 149 | } |
| 150 | |
| 151 | int DatagramSocket::writeBack( const char * message, size_t length ) |
| 152 | { |
| 153 | assert(length<=MAX_UDP_LENGTH); |
| 154 | int retVal = sendto(mSocketFD, message, length, 0, |
| 155 | (struct sockaddr *)mSource, addressSize()); |
| 156 | if (retVal == -1 ) perror("DatagramSocket::write() failed"); |
| 157 | return retVal; |
| 158 | } |
| 159 | |
| 160 | |
| 161 | |
| 162 | int DatagramSocket::write( const char * message) |
| 163 | { |
| 164 | size_t length=strlen(message)+1; |
| 165 | return write(message,length); |
| 166 | } |
| 167 | |
| 168 | int DatagramSocket::writeBack( const char * message) |
| 169 | { |
| 170 | size_t length=strlen(message)+1; |
| 171 | return writeBack(message,length); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | |
| 176 | int DatagramSocket::send(const struct sockaddr* dest, const char * message, size_t length ) |
| 177 | { |
| 178 | assert(length<=MAX_UDP_LENGTH); |
| 179 | int retVal = sendto(mSocketFD, message, length, 0, dest, addressSize()); |
| 180 | if (retVal == -1 ) perror("DatagramSocket::send() failed"); |
| 181 | return retVal; |
| 182 | } |
| 183 | |
| 184 | int DatagramSocket::send(const struct sockaddr* dest, const char * message) |
| 185 | { |
| 186 | size_t length=strlen(message)+1; |
| 187 | return send(dest,message,length); |
| 188 | } |
| 189 | |
Tom Tsou | 2c650a6 | 2016-04-28 21:55:17 -0700 | [diff] [blame] | 190 | int DatagramSocket::read(char* buffer, size_t length) |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 191 | { |
Tom Tsou | 2c650a6 | 2016-04-28 21:55:17 -0700 | [diff] [blame] | 192 | socklen_t addr_len = sizeof(mSource); |
| 193 | int rd_length = recvfrom(mSocketFD, (void *) buffer, length, 0, |
| 194 | (struct sockaddr*) &mSource, &addr_len); |
| 195 | |
| 196 | if ((rd_length==-1) && (errno!=EAGAIN)) { |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 197 | perror("DatagramSocket::read() failed"); |
| 198 | throw SocketError(); |
| 199 | } |
Tom Tsou | 2c650a6 | 2016-04-28 21:55:17 -0700 | [diff] [blame] | 200 | return rd_length; |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 201 | } |
| 202 | |
Tom Tsou | 2c650a6 | 2016-04-28 21:55:17 -0700 | [diff] [blame] | 203 | int DatagramSocket::read(char* buffer, size_t length, unsigned timeout) |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 204 | { |
| 205 | fd_set fds; |
kurtis.heimerl | 0aaabd4 | 2012-11-23 08:35:46 +0000 | [diff] [blame] | 206 | FD_ZERO(&fds); |
kurtis.heimerl | 9eafbe9 | 2012-11-23 08:38:04 +0000 | [diff] [blame] | 207 | FD_SET(mSocketFD,&fds); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 208 | struct timeval tv; |
| 209 | tv.tv_sec = timeout/1000; |
| 210 | tv.tv_usec = (timeout%1000)*1000; |
| 211 | int sel = select(mSocketFD+1,&fds,NULL,NULL,&tv); |
| 212 | if (sel<0) { |
| 213 | perror("DatagramSocket::read() select() failed"); |
| 214 | throw SocketError(); |
| 215 | } |
| 216 | if (sel==0) return -1; |
Tom Tsou | 2c650a6 | 2016-04-28 21:55:17 -0700 | [diff] [blame] | 217 | if (FD_ISSET(mSocketFD,&fds)) return read(buffer, length); |
kurtis.heimerl | a7fee63 | 2012-11-23 08:36:18 +0000 | [diff] [blame] | 218 | return -1; |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | |
| 222 | |
| 223 | |
| 224 | |
| 225 | |
Pau Espin Pedrol | 8c80095 | 2017-08-16 16:53:23 +0200 | [diff] [blame] | 226 | UDPSocket::UDPSocket(const char *wSrcIP, unsigned short wSrcPort) |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 227 | :DatagramSocket() |
| 228 | { |
Pau Espin Pedrol | 8c80095 | 2017-08-16 16:53:23 +0200 | [diff] [blame] | 229 | open(wSrcPort, wSrcIP); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | |
Pau Espin Pedrol | 8c80095 | 2017-08-16 16:53:23 +0200 | [diff] [blame] | 233 | UDPSocket::UDPSocket(const char *wSrcIP, unsigned short wSrcPort, |
| 234 | const char *wDestIP, unsigned short wDestPort) |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 235 | :DatagramSocket() |
| 236 | { |
Pau Espin Pedrol | 8c80095 | 2017-08-16 16:53:23 +0200 | [diff] [blame] | 237 | open(wSrcPort, wSrcIP); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 238 | destination(wDestPort, wDestIP); |
| 239 | } |
| 240 | |
| 241 | |
| 242 | |
| 243 | void UDPSocket::destination( unsigned short wDestPort, const char * wDestIP ) |
| 244 | { |
| 245 | resolveAddress((sockaddr_in*)mDestination, wDestIP, wDestPort ); |
| 246 | } |
| 247 | |
| 248 | |
Pau Espin Pedrol | 8c80095 | 2017-08-16 16:53:23 +0200 | [diff] [blame] | 249 | void UDPSocket::open(unsigned short localPort, const char *wlocalIP) |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 250 | { |
| 251 | // create |
| 252 | mSocketFD = socket(AF_INET,SOCK_DGRAM,0); |
| 253 | if (mSocketFD<0) { |
| 254 | perror("socket() failed"); |
| 255 | throw SocketError(); |
| 256 | } |
| 257 | |
kurtis.heimerl | 5a87247 | 2013-05-31 21:47:25 +0000 | [diff] [blame] | 258 | // pat added: This lets the socket be reused immediately, which is needed if OpenBTS crashes. |
| 259 | int on = 1; |
| 260 | setsockopt(mSocketFD, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 261 | |
| 262 | |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 263 | // bind |
| 264 | struct sockaddr_in address; |
| 265 | size_t length = sizeof(address); |
| 266 | bzero(&address,length); |
| 267 | address.sin_family = AF_INET; |
Pau Espin Pedrol | 8c80095 | 2017-08-16 16:53:23 +0200 | [diff] [blame] | 268 | address.sin_addr.s_addr = inet_addr(wlocalIP); |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 269 | address.sin_port = htons(localPort); |
| 270 | if (bind(mSocketFD,(struct sockaddr*)&address,length)<0) { |
| 271 | perror("bind() failed"); |
| 272 | throw SocketError(); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | |
| 277 | |
| 278 | unsigned short UDPSocket::port() const |
| 279 | { |
| 280 | struct sockaddr_in name; |
| 281 | socklen_t nameSize = sizeof(name); |
| 282 | int retVal = getsockname(mSocketFD, (struct sockaddr*)&name, &nameSize); |
| 283 | if (retVal==-1) throw SocketError(); |
| 284 | return ntohs(name.sin_port); |
| 285 | } |
| 286 | |
dburgess | 82c46ff | 2011-10-07 02:40:51 +0000 | [diff] [blame] | 287 | // vim:ts=4:sw=4 |