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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 #define LOG_LEVEL LOG_LVL_INFO
44 #define LOG_FORMAT LOG_FMT_TERSE
46 #include <cpu/byteorder.h>
48 #include <lwip/ip_addr.h>
50 #include <lwip/netif.h>
51 #include <lwip/netbuf.h>
52 #include <lwip/tcpip.h>
55 INLINE int close_socket(TcpSocket *socket)
57 /* Clean all previuos states */
58 netbuf_delete(socket->rx_buf_conn);
59 socket->rx_buf_conn = NULL;
60 socket->remaning_data_len = 0;
66 /* Close socket if was opened */
67 socket->error = netconn_delete(socket->sock);
70 if (socket->error != ERR_OK)
72 LOG_ERR("Closing socket\n");
79 static bool tcpsocket_reconnect(TcpSocket *socket)
81 LOG_INFO("Reconnecting...\n");
83 /* Close socket if was opened */
86 /* Start with new connection */
87 socket->sock = netconn_new(NETCONN_TCP);
90 LOG_ERR("Unabe to alloc new connection\n");
95 socket->error = netconn_bind(socket->sock, socket->local_addr, socket->port);
96 if(socket->error != ERR_OK)
98 LOG_ERR("Connection error\n");
102 socket->error = netconn_connect(socket->sock, socket->remote_addr, socket->port);
103 if(socket->error != ERR_OK)
105 LOG_ERR("Cannot create socket\n");
109 LOG_INFO("connected ip=%d.%d.%d.%d\n", IP_ADDR_TO_INT_TUPLE(socket->remote_addr->addr));
113 netconn_delete(socket->sock);
118 static int tcpsocket_close(KFile *fd)
120 TcpSocket *socket = TCPSOCKET_CAST(fd);
121 return close_socket(socket);
124 static KFile *tcpsocket_reopen(KFile *fd)
126 TcpSocket *socket = TCPSOCKET_CAST(fd);
127 if (tcpsocket_reconnect(socket))
133 static size_t tcpsocket_read(KFile *fd, void *buf, size_t len)
135 TcpSocket *socket = TCPSOCKET_CAST(fd);
138 uint16_t read_len = 0;
140 if (socket->remaning_data_len <= 0)
142 LOG_INFO("No byte left.\n");
143 netbuf_delete(socket->rx_buf_conn);
145 else /* We had byte into buffer use that */
147 LOG_INFO("Read stored bytes.\n");
148 if (!socket->rx_buf_conn)
150 LOG_ERR("Byte stored are corrupted!\n");
151 socket->remaning_data_len = 0;
154 uint16_t tot_data_len = 0;
155 netbuf_data(socket->rx_buf_conn, (void **)&data, &tot_data_len);
159 ASSERT(((int)tot_data_len - (int)socket->remaning_data_len) >= 0);
160 size_t chunk_len = MIN((size_t)(socket->remaning_data_len), len);
161 memcpy((char *)buf, &data[tot_data_len - socket->remaning_data_len], chunk_len);
163 socket->remaning_data_len -= chunk_len;
168 LOG_ERR("No valid data to read\n");
169 socket->remaning_data_len = 0;
170 netbuf_delete(socket->rx_buf_conn);
175 /* Try reconnecting if our socket isn't valid */
176 LOG_INFO("sock[%s]\n", socket->sock ? "valido":"nullo");
177 if (!socket->sock && !tcpsocket_reconnect(socket))
179 LOG_INFO("sock1[%s]\n", socket->sock ? "valido":"nullo");
183 LOG_INFO("Get bytes from socket.\n");
184 socket->rx_buf_conn = netconn_recv(socket->sock);
186 socket->error = netconn_err(socket->sock);
187 if (socket->error != ERR_OK)
189 LOG_ERR("While recv %d\n", socket->error);
190 close_socket(socket);
194 size_t chunk_len = 0;
195 uint16_t data_len = 0;
196 if (socket->rx_buf_conn)
198 netbuf_data(socket->rx_buf_conn, (void **)&data, &data_len);
202 chunk_len = MIN((size_t)data_len, len);
203 memcpy(buf, data, chunk_len);
205 socket->remaning_data_len = data_len - chunk_len;
208 if (socket->remaning_data_len <= 0)
210 netbuf_delete(socket->rx_buf_conn);
211 socket->rx_buf_conn = NULL;
212 socket->remaning_data_len = 0;
218 read_len += chunk_len;
224 static size_t tcpsocket_write(KFile *fd, const void *buf, size_t len)
226 TcpSocket *socket = TCPSOCKET_CAST(fd);
228 /* Try reconnecting if our socket isn't valid */
229 if (!socket->sock && !tcpsocket_reconnect(socket))
232 socket->error = netconn_write(socket->sock, buf, len, NETCONN_COPY);
233 if (socket->error != ERR_OK)
235 LOG_ERR("While writing %d\n", socket->error);
236 close_socket(socket);
243 static int tcpsocket_error(KFile *fd)
245 TcpSocket *socket = TCPSOCKET_CAST(fd);
246 return socket->error;
249 static void tcpsocket_clearerr(KFile *fd)
251 TcpSocket *socket = TCPSOCKET_CAST(fd);
255 void tcpsocket_init(TcpSocket *socket, struct ip_addr *local_addr, struct ip_addr *remote_addr, uint16_t port)
258 socket->local_addr = local_addr;
259 socket->remote_addr = remote_addr;
262 socket->fd._type = KFT_TCPSOCKET;
263 socket->fd.read = tcpsocket_read;
264 socket->fd.error = tcpsocket_error;
265 socket->fd.close = tcpsocket_close;
266 socket->fd.write = tcpsocket_write;
267 socket->fd.clearerr = tcpsocket_clearerr;
268 socket->fd.reopen = tcpsocket_reopen;