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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>
39 #include "tcp_socket.h"
41 #define LOG_LEVEL LOG_LVL_WARN
42 #define LOG_FORMAT LOG_FMT_TERSE
44 #include <cpu/byteorder.h>
46 #include <lwip/ip_addr.h>
47 #include <lwip/netif.h>
48 #include <lwip/netbuf.h>
49 #include <lwip/tcpip.h>
51 static int tcpConnect(TcpSocket *socket)
53 socket->sock = netconn_new(NETCONN_TCP);
56 if(netconn_bind(socket->sock, socket->local_addr, socket->port) != ERR_OK)
58 LOG_ERR("Connection error\n");
62 if(netconn_connect(socket->sock, socket->remote_addr, socket->port) != ERR_OK)
64 LOG_ERR("Cannot create socket\n");
68 LOG_INFO("connected ip=%d.%d.%d.%d\n", IP_ADDR_TO_INT_TUPLE(socket->local_addr->addr));
72 netconn_delete(socket->sock);
78 static bool reconnect(TcpSocket *socket)
80 LOG_INFO("Reconnecting...\n");
81 // Release old socket if needed
84 if (netconn_delete(socket->sock) != ERR_OK)
85 LOG_ERR("Error closing socket\n");
90 // Connect to our peer peer
91 if (tcpConnect(socket) < 0)
93 LOG_ERR("Reconnect error!\n");
94 socket->error |= ERR_TCP_NOTCONN;
98 LOG_INFO("Reconnecting DONE!\n");
103 static int tcpsocket_close(KFile *fd)
105 TcpSocket *socket = TCPSOCKET_CAST(fd);
106 int ret = netconn_delete(socket->sock);
111 LOG_ERR("Close error\n");
112 socket->error |= ERR_CONN_CLOSE;
118 static size_t tcpsocket_read(KFile *fd, void *buf, size_t len)
120 TcpSocket *socket = TCPSOCKET_CAST(fd);
121 uint16_t recv_len = 0;
123 // Try reconnecting if our socket isn't valid
126 if (!reconnect(socket))
132 struct netbuf *rx_buf_conn = netconn_recv(socket->sock);
135 netbuf_data(rx_buf_conn, (void **)&buf, &recv_len);
137 socket->error |= ERR_RECV_DATA;
141 // Do we have an EOF condition? If so, bailout.
142 if (recv_len == 0 && len != 0)
144 LOG_INFO("Connection reset by peer\n");
147 if (tcpsocket_close(fd) == EOF)
148 LOG_ERR("Error closing socket, leak detected\n");
158 static size_t tcpsocket_write(KFile *fd, const void *buf, size_t len)
160 TcpSocket *socket = TCPSOCKET_CAST(fd);
163 // Try reconnecting if our socket isn't valid
166 if (!reconnect(socket))
170 result = netconn_write(socket->sock, buf, len, NETCONN_COPY);
171 if (result != ERR_OK)
173 LOG_ERR("While writing %d\n", result);
174 if (result == ERR_RST)
176 LOG_INFO("Connection close\n");
178 if (tcpsocket_close(fd) == EOF)
179 LOG_ERR("Error closing socket, leak detected\n");
188 static int tcpsocket_error(KFile *fd)
190 TcpSocket *socket = TCPSOCKET_CAST(fd);
191 return socket->error;
194 static void tcpsocket_clearerr(KFile *fd)
196 TcpSocket *socket = TCPSOCKET_CAST(fd);
200 void tcpsocket_init(TcpSocket *socket, struct ip_addr *local_addr, struct ip_addr *remote_addr, uint16_t port)
203 socket->local_addr = local_addr;
204 socket->remote_addr = remote_addr;
207 socket->fd._type = KFT_TCPSOCKET;
208 socket->fd.read = tcpsocket_read;
209 socket->fd.error = tcpsocket_error;
210 socket->fd.close = tcpsocket_close;
211 socket->fd.write = tcpsocket_write;
212 socket->fd.clearerr = tcpsocket_clearerr;