4 * This file is part of BeRTOS.
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2012 Develer S.r.l. (http://www.develer.com/)
33 * \brief TCP sockect with kfile interface.
35 * \author Luca Ottaviano <lottaviano@develer.com>
36 * \author Daniele Basile <asterix@develer.com>
41 #include "tcp_socket.h"
43 #include "cfg/cfg_tcpsocket.h"
45 #define LOG_LEVEL TCPSOCKET_LOG_LEVEL
46 #define LOG_FORMAT TCPSOCKET_LOG_FORMAT
48 #include <cpu/byteorder.h>
50 #include <lwip/ip_addr.h>
52 #include <lwip/netif.h>
53 #include <lwip/netbuf.h>
54 #include <lwip/tcpip.h>
57 INLINE int close_socket(TcpSocket *socket)
59 /* Clean all previuos states */
60 netbuf_delete(socket->rx_buf_conn);
61 socket->rx_buf_conn = NULL;
62 socket->remaning_data_len = 0;
68 /* Close socket if was opened */
69 socket->error = netconn_delete(socket->sock);
72 if (socket->error != ERR_OK)
74 LOG_ERR("Closing socket\n");
81 static bool tcpsocket_reconnect(TcpSocket *socket)
83 LOG_INFO("Reconnecting...\n");
85 /* Close socket if was opened */
88 /* Start with new connection */
89 socket->sock = netconn_new(NETCONN_TCP);
92 LOG_ERR("Unabe to alloc new connection\n");
97 socket->error = netconn_bind(socket->sock, socket->local_addr, socket->port);
98 if(socket->error != ERR_OK)
100 LOG_ERR("Connection error\n");
104 socket->error = netconn_connect(socket->sock, socket->remote_addr, socket->port);
105 if(socket->error != ERR_OK)
107 LOG_ERR("Cannot create socket\n");
111 LOG_INFO("connected ip=%d.%d.%d.%d\n", IP_ADDR_TO_INT_TUPLE(socket->remote_addr->addr));
115 netconn_delete(socket->sock);
120 static int tcpsocket_close(KFile *fd)
122 TcpSocket *socket = TCPSOCKET_CAST(fd);
123 return close_socket(socket);
126 static KFile *tcpsocket_reopen(KFile *fd)
128 TcpSocket *socket = TCPSOCKET_CAST(fd);
129 if (tcpsocket_reconnect(socket))
136 * Read data from socket.
138 * The read return the bytes that had been received if they are less than we request too.
139 * Otherwise if the byte that we want read are less that the received bytes, we return only
140 * the requested bytes. To get the remaning bytes we need to make an others read, until the
142 * When there are not any more bytes, a new read takes data from remote socket.
144 static size_t tcpsocket_read(KFile *fd, void *buf, size_t len)
146 TcpSocket *socket = TCPSOCKET_CAST(fd);
149 uint16_t read_len = 0;
151 if (socket->remaning_data_len <= 0)
153 LOG_INFO("No byte left.\n");
154 netbuf_delete(socket->rx_buf_conn);
156 else /* We had byte into buffer use that */
158 LOG_INFO("Read stored bytes.\n");
159 if (!socket->rx_buf_conn)
161 LOG_ERR("Byte stored are corrupted!\n");
162 socket->remaning_data_len = 0;
165 uint16_t tot_data_len = 0;
166 netbuf_data(socket->rx_buf_conn, (void **)&data, &tot_data_len);
170 ASSERT(((int)tot_data_len - (int)socket->remaning_data_len) >= 0);
171 size_t chunk_len = MIN((size_t)(socket->remaning_data_len), len);
172 memcpy((char *)buf, &data[tot_data_len - socket->remaning_data_len], chunk_len);
174 socket->remaning_data_len -= chunk_len;
179 LOG_ERR("No valid data to read\n");
180 socket->remaning_data_len = 0;
181 netbuf_delete(socket->rx_buf_conn);
186 /* Try reconnecting if our socket isn't valid */
187 if (!socket->sock && !tcpsocket_reconnect(socket))
192 LOG_INFO("Get bytes from socket.\n");
193 socket->rx_buf_conn = netconn_recv(socket->sock);
195 socket->error = netconn_err(socket->sock);
196 if (socket->error != ERR_OK)
198 LOG_ERR("While recv %d\n", socket->error);
199 close_socket(socket);
203 size_t chunk_len = 0;
204 uint16_t data_len = 0;
205 if (socket->rx_buf_conn)
207 netbuf_data(socket->rx_buf_conn, (void **)&data, &data_len);
211 chunk_len = MIN((size_t)data_len, len);
212 memcpy(buf, data, chunk_len);
214 socket->remaning_data_len = data_len - chunk_len;
217 if (socket->remaning_data_len <= 0)
219 netbuf_delete(socket->rx_buf_conn);
220 socket->rx_buf_conn = NULL;
221 socket->remaning_data_len = 0;
227 read_len += chunk_len;
233 static size_t tcpsocket_write(KFile *fd, const void *buf, size_t len)
235 TcpSocket *socket = TCPSOCKET_CAST(fd);
237 /* Try reconnecting if our socket isn't valid */
238 if (!socket->sock && !tcpsocket_reconnect(socket))
241 socket->error = netconn_write(socket->sock, buf, len, NETCONN_COPY);
242 if (socket->error != ERR_OK)
244 LOG_ERR("While writing %d\n", socket->error);
245 close_socket(socket);
252 static int tcpsocket_error(KFile *fd)
254 TcpSocket *socket = TCPSOCKET_CAST(fd);
255 return socket->error;
258 static void tcpsocket_clearerr(KFile *fd)
260 TcpSocket *socket = TCPSOCKET_CAST(fd);
264 void tcpsocket_init(TcpSocket *socket, struct ip_addr *local_addr, struct ip_addr *remote_addr, uint16_t port)
267 socket->local_addr = local_addr;
268 socket->remote_addr = remote_addr;
271 socket->fd._type = KFT_TCPSOCKET;
272 socket->fd.read = tcpsocket_read;
273 socket->fd.error = tcpsocket_error;
274 socket->fd.close = tcpsocket_close;
275 socket->fd.write = tcpsocket_write;
276 socket->fd.clearerr = tcpsocket_clearerr;
277 socket->fd.reopen = tcpsocket_reopen;