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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_WARN
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>
54 static int tcpConnect(TcpSocket *socket)
56 socket->sock = netconn_new(NETCONN_TCP);
59 if(netconn_bind(socket->sock, socket->local_addr, socket->port) != ERR_OK)
61 LOG_ERR("Connection error\n");
65 if(netconn_connect(socket->sock, socket->remote_addr, socket->port) != ERR_OK)
67 LOG_ERR("Cannot create socket\n");
71 LOG_INFO("connected ip=%d.%d.%d.%d\n", IP_ADDR_TO_INT_TUPLE(socket->local_addr->addr));
75 netconn_delete(socket->sock);
81 static bool reconnect(TcpSocket *socket)
83 LOG_INFO("Reconnecting...\n");
84 // Release old socket if needed
87 if (netconn_delete(socket->sock) != ERR_OK)
88 LOG_ERR("Error closing socket\n");
93 // Connect to our peer peer
94 if (tcpConnect(socket) < 0)
96 LOG_ERR("Reconnect error!\n");
97 socket->error |= ERR_TCP_NOTCONN;
101 LOG_INFO("Reconnecting DONE!\n");
106 static int tcpsocket_close(KFile *fd)
108 TcpSocket *socket = TCPSOCKET_CAST(fd);
109 int ret = netconn_delete(socket->sock);
114 LOG_ERR("Close error\n");
115 socket->error |= ERR_CONN_CLOSE;
121 static size_t tcpsocket_read(KFile *fd, void *buf, size_t len)
123 TcpSocket *socket = TCPSOCKET_CAST(fd);
124 uint16_t recv_len = 0;
126 // Try reconnecting if our socket isn't valid
129 if (!reconnect(socket))
135 struct netbuf *rx_buf_conn = netconn_recv(socket->sock);
138 netbuf_data(rx_buf_conn, (void **)&buf, &recv_len);
140 socket->error |= ERR_RECV_DATA;
144 // Do we have an EOF condition? If so, bailout.
145 if (recv_len == 0 && len != 0)
147 LOG_INFO("Connection reset by peer\n");
150 if (tcpsocket_close(fd) == EOF)
151 LOG_ERR("Error closing socket, leak detected\n");
161 static size_t tcpsocket_write(KFile *fd, const void *buf, size_t len)
163 TcpSocket *socket = TCPSOCKET_CAST(fd);
166 // Try reconnecting if our socket isn't valid
169 if (!reconnect(socket))
173 result = netconn_write(socket->sock, buf, len, NETCONN_COPY);
174 if (result != ERR_OK)
176 LOG_ERR("While writing %d\n", result);
177 if (result == ERR_RST)
179 LOG_INFO("Connection close\n");
181 if (tcpsocket_close(fd) == EOF)
182 LOG_ERR("Error closing socket, leak detected\n");
191 static int tcpsocket_error(KFile *fd)
193 TcpSocket *socket = TCPSOCKET_CAST(fd);
194 return socket->error;
197 static void tcpsocket_clearerr(KFile *fd)
199 TcpSocket *socket = TCPSOCKET_CAST(fd);
203 void tcpsocket_init(TcpSocket *socket, struct ip_addr *local_addr, struct ip_addr *remote_addr, uint16_t port)
206 socket->local_addr = local_addr;
207 socket->remote_addr = remote_addr;
210 socket->fd._type = KFT_TCPSOCKET;
211 socket->fd.read = tcpsocket_read;
212 socket->fd.error = tcpsocket_error;
213 socket->fd.close = tcpsocket_close;
214 socket->fd.write = tcpsocket_write;
215 socket->fd.clearerr = tcpsocket_clearerr;