[657] | 1 | /* |
---|
| 2 | * socket.c - socket API implementation. |
---|
| 3 | * |
---|
| 4 | * Authors Alain Greiner (2016,2017,2018,2019,2020) |
---|
| 5 | * |
---|
| 6 | * Copyright (c) UPMC Sorbonne Universites |
---|
| 7 | * |
---|
| 8 | * This file is part of ALMOS-MKH. |
---|
| 9 | * |
---|
| 10 | * ALMOS-MKH.is free software; you can redistribute it and/or modify it |
---|
| 11 | * under the terms of the GNU General Public License as published by |
---|
| 12 | * the Free Software Foundation; version 2.0 of the License. |
---|
| 13 | * |
---|
| 14 | * ALMOS-MKH.is distributed in the hope that it will be useful, but |
---|
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
| 17 | * General Public License for more details. |
---|
| 18 | * |
---|
| 19 | * You should have received a copy of the GNU General Public License |
---|
| 20 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
---|
| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
---|
| 22 | */ |
---|
| 23 | |
---|
| 24 | #include <kernel_config.h> |
---|
| 25 | #include <hal_kernel_types.h> |
---|
| 26 | #include <hal_remote.h> |
---|
| 27 | #include <shared_socket.h> |
---|
| 28 | #include <process.h> |
---|
| 29 | #include <remote_buf.h> |
---|
| 30 | #include <printk.h> |
---|
| 31 | #include <kmem.h> |
---|
| 32 | #include <thread.h> |
---|
| 33 | #include <vfs.h> |
---|
| 34 | #include <socket.h> |
---|
| 35 | |
---|
| 36 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 37 | // Extern global variables |
---|
| 38 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 39 | |
---|
| 40 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
---|
| 41 | |
---|
| 42 | ////////////////////////////////////// |
---|
| 43 | char * socket_cmd_str( uint32_t type ) |
---|
| 44 | { |
---|
| 45 | switch( type ) |
---|
| 46 | { |
---|
| 47 | case SOCKET_TX_CONNECT : return "CONNECT"; |
---|
| 48 | case SOCKET_TX_SEND : return "SEND"; |
---|
| 49 | case SOCKET_TX_CLOSE : return "CLOSE"; |
---|
| 50 | |
---|
| 51 | default: return "undefined"; |
---|
| 52 | } |
---|
| 53 | } |
---|
| 54 | |
---|
| 55 | ///////////////////////////////////////// |
---|
| 56 | char * socket_state_str( uint32_t state ) |
---|
| 57 | { |
---|
| 58 | switch( state ) |
---|
| 59 | { |
---|
| 60 | case UDP_STATE_UNBOUND : return "UDP_UNBOUND"; |
---|
| 61 | case UDP_STATE_BOUND : return "UDP_BOUND"; |
---|
| 62 | case UDP_STATE_CONNECT : return "UDP_CONNECT"; |
---|
| 63 | |
---|
| 64 | case TCP_STATE_UNBOUND : return "TCP_UNBOUND"; |
---|
| 65 | case TCP_STATE_BOUND : return "TCP_BOUND"; |
---|
| 66 | case TCP_STATE_LISTEN : return "TCP_LISTEN"; |
---|
| 67 | case TCP_STATE_SYN_SENT : return "TCP_SYN_SENT"; |
---|
| 68 | case TCP_STATE_SYN_RCVD : return "TCP_SYN_RCVD"; |
---|
| 69 | case TCP_STATE_ESTAB : return "TCP_ESTAB"; |
---|
| 70 | case TCP_STATE_FIN_WAIT1 : return "TCP_FIN_WAIT1"; |
---|
| 71 | case TCP_STATE_FIN_WAIT2 : return "TCP_FIN_WAIT2"; |
---|
| 72 | case TCP_STATE_CLOSING : return "TCP_CLOSING"; |
---|
| 73 | case TCP_STATE_TIME_WAIT : return "TCP_TIME_WAIT"; |
---|
| 74 | case TCP_STATE_CLOSE_WAIT : return "TCP_CLOSE_WAIT"; |
---|
| 75 | case TCP_STATE_LAST_ACK : return "TCP_LAST_ACK"; |
---|
| 76 | |
---|
| 77 | default: return "undefined"; |
---|
| 78 | } |
---|
| 79 | } |
---|
| 80 | |
---|
| 81 | /////////////////////////////////////// |
---|
| 82 | error_t socket_create( cxy_t cxy, |
---|
| 83 | uint32_t domain, |
---|
| 84 | uint32_t type, |
---|
| 85 | socket_t ** socket_ptr, |
---|
| 86 | uint32_t * fdid_ptr ) |
---|
| 87 | { |
---|
| 88 | uint32_t fdid; |
---|
| 89 | |
---|
| 90 | thread_t * this = CURRENT_THREAD; |
---|
| 91 | process_t * process = this->process; |
---|
| 92 | |
---|
| 93 | kmem_req_t req; |
---|
| 94 | socket_t * socket; |
---|
| 95 | vfs_file_t * file; |
---|
| 96 | uint32_t state; |
---|
| 97 | error_t error; |
---|
| 98 | |
---|
| 99 | // allocate memory for socket descriptor |
---|
| 100 | req.type = KMEM_KCM; |
---|
| 101 | req.order = bits_log2( sizeof(socket_t) ); |
---|
| 102 | req.flags = AF_ZERO; |
---|
| 103 | socket = kmem_remote_alloc( cxy , &req ); |
---|
| 104 | |
---|
| 105 | if( socket == NULL ) |
---|
| 106 | { |
---|
| 107 | printk("\n[ERROR] in %s : cannot allocate socket descriptor / thread[%x,%x]\n", |
---|
| 108 | __FUNCTION__, process->pid, this->trdid ); |
---|
| 109 | return -1; |
---|
| 110 | } |
---|
| 111 | |
---|
| 112 | // allocate memory for rx_buf buffer |
---|
| 113 | error = remote_buf_create( XPTR( cxy , &socket->rx_buf ), |
---|
| 114 | NIC_RX_BUF_SIZE ); |
---|
| 115 | |
---|
| 116 | if( error ) |
---|
| 117 | { |
---|
| 118 | printk("\n[ERROR] in %s : cannot allocate rx_buf / thread[%x,%x]\n", |
---|
| 119 | __FUNCTION__, process->pid, this->trdid ); |
---|
| 120 | req.type = KMEM_KCM; |
---|
| 121 | req.ptr = socket; |
---|
| 122 | kmem_remote_free( cxy , &req ); |
---|
| 123 | return -1; |
---|
| 124 | } |
---|
| 125 | |
---|
| 126 | // allocate memory for r2tq queue |
---|
| 127 | error = remote_buf_create( XPTR( cxy , &socket->r2tq ), |
---|
| 128 | NIC_R2T_QUEUE_SIZE ); |
---|
| 129 | if( error ) |
---|
| 130 | { |
---|
| 131 | printk("\n[ERROR] in %s : cannot allocate R2T queue / thread[%x,%x]\n", |
---|
| 132 | __FUNCTION__, process->pid, this->trdid ); |
---|
| 133 | remote_buf_destroy( XPTR( cxy , &socket->rx_buf ) ); |
---|
| 134 | req.type = KMEM_KCM; |
---|
| 135 | req.ptr = socket; |
---|
| 136 | kmem_remote_free( cxy , &req ); |
---|
| 137 | return -1; |
---|
| 138 | } |
---|
| 139 | |
---|
| 140 | // allocate memory for crqq queue |
---|
| 141 | error = remote_buf_create( XPTR( cxy , &socket->crqq ), |
---|
| 142 | NIC_CRQ_QUEUE_SIZE * sizeof(sockaddr_t) ); |
---|
| 143 | if( error ) |
---|
| 144 | { |
---|
| 145 | printk("\n[ERROR] in %s : cannot allocate CRQ queue / thread[%x,%x]\n", |
---|
| 146 | __FUNCTION__, process->pid, this->trdid ); |
---|
| 147 | remote_buf_destroy( XPTR( cxy , &socket->r2tq ) ); |
---|
| 148 | remote_buf_destroy( XPTR( cxy , &socket->rx_buf ) ); |
---|
| 149 | req.type = KMEM_KCM; |
---|
| 150 | req.ptr = socket; |
---|
| 151 | kmem_remote_free( cxy , &req ); |
---|
| 152 | return -1; |
---|
| 153 | } |
---|
| 154 | |
---|
| 155 | // allocate memory for file descriptor |
---|
| 156 | req.type = KMEM_KCM; |
---|
| 157 | req.order = bits_log2( sizeof(vfs_file_t) ); |
---|
| 158 | req.flags = AF_ZERO; |
---|
| 159 | file = kmem_remote_alloc( cxy , &req ); |
---|
| 160 | |
---|
| 161 | if( file == NULL ) |
---|
| 162 | { |
---|
| 163 | printk("\n[ERROR] in %s : cannot allocate file descriptor / thread[%x,%x]\n", |
---|
| 164 | __FUNCTION__, process->pid, this->trdid ); |
---|
| 165 | remote_buf_destroy( XPTR( cxy , &socket->crqq ) ); |
---|
| 166 | remote_buf_destroy( XPTR( cxy , &socket->r2tq ) ); |
---|
| 167 | remote_buf_destroy( XPTR( cxy , &socket->rx_buf ) ); |
---|
| 168 | req.type = KMEM_KCM; |
---|
| 169 | req.ptr = socket; |
---|
| 170 | kmem_remote_free( cxy , &req ); |
---|
| 171 | return -1; |
---|
| 172 | } |
---|
| 173 | |
---|
| 174 | // get an fdid value, and register file descriptor in fd_array[] |
---|
| 175 | error = process_fd_register( process->ref_xp, |
---|
| 176 | XPTR( cxy , file ), |
---|
| 177 | &fdid ); |
---|
| 178 | if ( error ) |
---|
| 179 | { |
---|
| 180 | printk("\n[ERROR] in %s : cannot register file descriptor / thread[%x,%x]\n", |
---|
| 181 | __FUNCTION__, process->pid, this->trdid ); |
---|
| 182 | req.type = KMEM_KCM; |
---|
| 183 | req.ptr = file; |
---|
| 184 | kmem_free( &req ); |
---|
| 185 | remote_buf_destroy( XPTR( cxy , &socket->crqq ) ); |
---|
| 186 | remote_buf_destroy( XPTR( cxy , &socket->r2tq ) ); |
---|
| 187 | remote_buf_destroy( XPTR( cxy , &socket->rx_buf ) ); |
---|
| 188 | req.ptr = socket; |
---|
| 189 | kmem_free( &req ); |
---|
| 190 | return -1; |
---|
| 191 | } |
---|
| 192 | state = (type == SOCK_STREAM) ? TCP_STATE_UNBOUND : UDP_STATE_UNBOUND; |
---|
| 193 | |
---|
| 194 | // initialise socket descriptor |
---|
| 195 | hal_remote_s32( XPTR( cxy , &socket->domain ) , domain ); |
---|
| 196 | hal_remote_s32( XPTR( cxy , &socket->type ) , type ); |
---|
| 197 | hal_remote_s32( XPTR( cxy , &socket->pid ) , process->pid ); |
---|
| 198 | hal_remote_s32( XPTR( cxy , &socket->state ) , state ); |
---|
| 199 | hal_remote_s64( XPTR( cxy , &socket->tx_client ) , XPTR_NULL ); |
---|
| 200 | hal_remote_s64( XPTR( cxy , &socket->rx_client ) , XPTR_NULL ); |
---|
| 201 | |
---|
| 202 | // initialize file descriptor |
---|
| 203 | hal_remote_s32( XPTR( cxy , &file->type ) , INODE_TYPE_SOCK ); |
---|
| 204 | hal_remote_spt( XPTR( cxy , &file->socket ) , socket ); |
---|
| 205 | hal_remote_s32( XPTR( cxy , &file->refcount ) , 1 ); |
---|
| 206 | |
---|
| 207 | remote_rwlock_init( XPTR( cxy , &file->lock ) , LOCK_VFS_FILE ); |
---|
| 208 | |
---|
| 209 | // return success |
---|
| 210 | *socket_ptr = socket; |
---|
| 211 | *fdid_ptr = fdid; |
---|
| 212 | |
---|
| 213 | return 0; |
---|
| 214 | |
---|
| 215 | } // end socket_create |
---|
| 216 | |
---|
| 217 | //////////////////////////////////// |
---|
| 218 | void socket_destroy( uint32_t fdid ) |
---|
| 219 | { |
---|
| 220 | uint32_t type; |
---|
| 221 | socket_t * socket; |
---|
| 222 | kmem_req_t req; |
---|
| 223 | |
---|
| 224 | thread_t * this = CURRENT_THREAD; |
---|
| 225 | process_t * process = this->process; |
---|
| 226 | |
---|
| 227 | // get pointers on file descriptor |
---|
| 228 | xptr_t file_xp = process_fd_get_xptr( process , fdid ); |
---|
| 229 | vfs_file_t * file = GET_PTR( file_xp ); |
---|
| 230 | cxy_t cxy = GET_CXY( file_xp ); |
---|
| 231 | |
---|
| 232 | type = hal_remote_l32( XPTR( cxy , &file->type ) ); |
---|
| 233 | socket = hal_remote_lpt( XPTR( cxy , &file->socket ) ); |
---|
| 234 | |
---|
| 235 | // check file descriptor pointer |
---|
| 236 | assert( (file_xp != XPTR_NULL), "illegal fdid\n" ); |
---|
| 237 | |
---|
| 238 | // check file descriptor type |
---|
| 239 | assert( (type == INODE_TYPE_SOCK), "illegal file type\n" ); |
---|
| 240 | |
---|
| 241 | // remove the file descriptor from the process |
---|
| 242 | process_fd_remove( process->owner_xp , fdid ); |
---|
| 243 | |
---|
| 244 | // release memory allocated for file descriptor |
---|
| 245 | req.type = KMEM_KCM; |
---|
| 246 | req.ptr = file; |
---|
| 247 | kmem_remote_free( cxy , &req ); |
---|
| 248 | |
---|
| 249 | // release memory allocated for buffers attached to socket descriptor |
---|
| 250 | remote_buf_destroy( XPTR( cxy , &socket->crqq ) ); |
---|
| 251 | remote_buf_destroy( XPTR( cxy , &socket->r2tq ) ); |
---|
| 252 | remote_buf_destroy( XPTR( cxy , &socket->rx_buf ) ); |
---|
| 253 | |
---|
| 254 | // release memory allocated for socket descriptor |
---|
| 255 | req.type = KMEM_KCM; |
---|
| 256 | req.ptr = socket; |
---|
| 257 | kmem_remote_free( cxy , &req ); |
---|
| 258 | |
---|
| 259 | } // end socket_destroy() |
---|
| 260 | |
---|
| 261 | ///////////////////////////////////////////////// |
---|
| 262 | void socket_link_to_servers( xptr_t socket_xp, |
---|
| 263 | uint32_t nic_channel ) |
---|
| 264 | { |
---|
| 265 | cxy_t socket_cxy = GET_CXY( socket_xp ); |
---|
| 266 | socket_t * socket_ptr = GET_PTR( socket_xp ); |
---|
| 267 | |
---|
| 268 | // get pointers on NIC_TX[index] chdev |
---|
| 269 | xptr_t tx_chdev_xp = chdev_dir.nic_tx[nic_channel]; |
---|
| 270 | chdev_t * tx_chdev_ptr = GET_PTR( tx_chdev_xp ); |
---|
| 271 | cxy_t tx_chdev_cxy = GET_CXY( tx_chdev_xp ); |
---|
| 272 | |
---|
| 273 | // build extended pointers on root of sockets attached to NIC_TX[channel] chdev |
---|
| 274 | xptr_t tx_root_xp = XPTR( tx_chdev_cxy , &tx_chdev_ptr->wait_root ); |
---|
| 275 | xptr_t tx_lock_xp = XPTR( tx_chdev_cxy , &tx_chdev_ptr->wait_lock ); |
---|
| 276 | |
---|
| 277 | // register socket in the NIC_TX[channel] chdev clients queue |
---|
| 278 | remote_rwlock_wr_acquire( tx_lock_xp ); |
---|
| 279 | xlist_add_last( tx_root_xp , XPTR( socket_cxy , &socket_ptr->tx_list ) ); |
---|
| 280 | remote_rwlock_wr_release( tx_lock_xp ); |
---|
| 281 | |
---|
| 282 | // get pointers on NIC_RX[index] chdev |
---|
| 283 | xptr_t rx_chdev_xp = chdev_dir.nic_rx[nic_channel]; |
---|
| 284 | chdev_t * rx_chdev_ptr = GET_PTR( rx_chdev_xp ); |
---|
| 285 | cxy_t rx_chdev_cxy = GET_CXY( rx_chdev_xp ); |
---|
| 286 | |
---|
| 287 | // build extended pointer on root of sockets attached to NIC_TX[channel] chdev |
---|
| 288 | xptr_t rx_root_xp = XPTR( rx_chdev_cxy , &rx_chdev_ptr->wait_root ); |
---|
| 289 | xptr_t rx_lock_xp = XPTR( rx_chdev_cxy , &rx_chdev_ptr->wait_lock ); |
---|
| 290 | |
---|
| 291 | // register socket in the NIC_RX[channel] chdev clients queue |
---|
| 292 | remote_rwlock_wr_acquire( rx_lock_xp ); |
---|
| 293 | xlist_add_last( rx_root_xp , XPTR( socket_cxy , &socket_ptr->rx_list ) ); |
---|
| 294 | remote_rwlock_wr_release( rx_lock_xp ); |
---|
| 295 | |
---|
| 296 | } // end socket_link_to_server() |
---|
| 297 | |
---|
| 298 | |
---|