-/*\r
- * Copyright (c) 2004, Swedish Institute of Computer Science.\r
- * All rights reserved.\r
- *\r
- * Redistribution and use in source and binary forms, with or without\r
- * modification, are permitted provided that the following conditions\r
- * are met:\r
- * 1. Redistributions of source code must retain the above copyright\r
- * notice, this list of conditions and the following disclaimer.\r
- * 2. Redistributions in binary form must reproduce the above copyright\r
- * notice, this list of conditions and the following disclaimer in the\r
- * documentation and/or other materials provided with the distribution.\r
- * 3. Neither the name of the Institute nor the names of its contributors\r
- * may be used to endorse or promote products derived from this software\r
- * without specific prior written permission.\r
- *\r
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND\r
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
- * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE\r
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
- * SUCH DAMAGE.\r
- *\r
- * This file is part of the Contiki operating system.\r
- *\r
- * Author: Adam Dunkels <adam@sics.se>\r
- *\r
- * $Id: uip-split.c,v 1.2 2008/10/14 13:39:12 julienabeille Exp $\r
- */\r
-\r
-#include "uip-split.h"\r
-\r
-\r
-#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])\r
-\r
-/*-----------------------------------------------------------------------------*/\r
-void\r
-uip_split_output(void)\r
-{\r
-#if UIP_TCP\r
- u16_t tcplen, len1, len2;\r
-\r
- /* We only try to split maximum sized TCP segments. */\r
- if(BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE) {\r
- \r
- tcplen = uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN;\r
- /* Split the segment in two. If the original packet length was\r
- odd, we make the second packet one byte larger. */\r
- len1 = len2 = tcplen / 2;\r
- if(len1 + len2 < tcplen) {\r
- ++len2;\r
- }\r
-\r
- /* Create the first packet. This is done by altering the length\r
- field of the IP header and updating the checksums. */\r
- uip_len = len1 + UIP_TCPIP_HLEN + UIP_LLH_LEN;\r
-#if UIP_CONF_IPV6\r
- /* For IPv6, the IP length field does not include the IPv6 IP header\r
- length. */\r
- BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);\r
- BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);\r
-#else /* UIP_CONF_IPV6 */\r
- BUF->len[0] = (uip_len - UIP_LLH_LEN) >> 8;\r
- BUF->len[1] = (uip_len - UIP_LLH_LEN) & 0xff;\r
-#endif /* UIP_CONF_IPV6 */\r
- \r
- /* Recalculate the TCP checksum. */\r
- BUF->tcpchksum = 0;\r
- BUF->tcpchksum = ~(uip_tcpchksum());\r
-\r
-#if !UIP_CONF_IPV6\r
- /* Recalculate the IP checksum. */\r
- BUF->ipchksum = 0;\r
- BUF->ipchksum = ~(uip_ipchksum());\r
-#endif /* UIP_CONF_IPV6 */\r
- \r
- /* Transmit the first packet. */\r
-#if UIP_CONF_IPV6\r
- tcpip_ipv6_output();\r
-#else\r
- RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);\r
-#endif /* UIP_CONF_IPV6 */\r
- \r
- /* Now, create the second packet. To do this, it is not enough to\r
- just alter the length field, but we must also update the TCP\r
- sequence number and point the uip_appdata to a new place in\r
- memory. This place is detemined by the length of the first\r
- packet (len1). */\r
- uip_len = len2 + UIP_TCPIP_HLEN + UIP_LLH_LEN;\r
-#if UIP_CONF_IPV6\r
- /* For IPv6, the IP length field does not include the IPv6 IP header\r
- length. */\r
- BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);\r
- BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);\r
-#else /* UIP_CONF_IPV6 */\r
- BUF->len[0] = (uip_len - UIP_LLH_LEN) >> 8;\r
- BUF->len[1] = (uip_len - UIP_LLH_LEN) & 0xff;\r
-#endif /* UIP_CONF_IPV6 */\r
- \r
- memcpy(uip_appdata, (u8_t *)uip_appdata + len1, len2);\r
-\r
- uip_add32(BUF->seqno, len1);\r
- BUF->seqno[0] = uip_acc32[0];\r
- BUF->seqno[1] = uip_acc32[1];\r
- BUF->seqno[2] = uip_acc32[2];\r
- BUF->seqno[3] = uip_acc32[3];\r
- \r
- /* Recalculate the TCP checksum. */\r
- BUF->tcpchksum = 0;\r
- BUF->tcpchksum = ~(uip_tcpchksum());\r
-\r
-#if !UIP_CONF_IPV6\r
- /* Recalculate the IP checksum. */\r
- BUF->ipchksum = 0;\r
- BUF->ipchksum = ~(uip_ipchksum());\r
-#endif /* UIP_CONF_IPV6 */\r
-\r
- /* Transmit the second packet. */\r
-#if UIP_CONF_IPV6\r
- tcpip_ipv6_output();\r
-#else\r
- RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);\r
-#endif /* UIP_CONF_IPV6 */\r
- return;\r
- }\r
-#endif /* UIP_TCP */\r
-\r
- /* uip_fw_output();*/\r
-#if UIP_CONF_IPV6\r
- tcpip_ipv6_output();\r
-#else\r
- RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);\r
-#endif /* UIP_CONF_IPV6 */\r
-}\r
-\r
-/*-----------------------------------------------------------------------------*/\r
+/*
+ * Copyright (c) 2004, Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ * $Id: uip-split.c,v 1.2 2008/10/14 13:39:12 julienabeille Exp $
+ */
+
+#include "uip-split.h"
+
+
+#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
+
+/*-----------------------------------------------------------------------------*/
+void
+uip_split_output(void)
+{
+#if UIP_TCP
+ u16_t tcplen, len1, len2;
+
+ /* We only try to split maximum sized TCP segments. */
+ if(BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE) {
+
+ tcplen = uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN;
+ /* Split the segment in two. If the original packet length was
+ odd, we make the second packet one byte larger. */
+ len1 = len2 = tcplen / 2;
+ if(len1 + len2 < tcplen) {
+ ++len2;
+ }
+
+ /* Create the first packet. This is done by altering the length
+ field of the IP header and updating the checksums. */
+ uip_len = len1 + UIP_TCPIP_HLEN + UIP_LLH_LEN;
+#if UIP_CONF_IPV6
+ /* For IPv6, the IP length field does not include the IPv6 IP header
+ length. */
+ BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
+ BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
+#else /* UIP_CONF_IPV6 */
+ BUF->len[0] = (uip_len - UIP_LLH_LEN) >> 8;
+ BUF->len[1] = (uip_len - UIP_LLH_LEN) & 0xff;
+#endif /* UIP_CONF_IPV6 */
+
+ /* Recalculate the TCP checksum. */
+ BUF->tcpchksum = 0;
+ BUF->tcpchksum = ~(uip_tcpchksum());
+
+#if !UIP_CONF_IPV6
+ /* Recalculate the IP checksum. */
+ BUF->ipchksum = 0;
+ BUF->ipchksum = ~(uip_ipchksum());
+#endif /* UIP_CONF_IPV6 */
+
+ /* Transmit the first packet. */
+#if UIP_CONF_IPV6
+ tcpip_ipv6_output();
+#else
+ if (USB_CurrentMode == USB_MODE_Device)
+ RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len);
+ else
+ RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, uip_len);
+#endif /* UIP_CONF_IPV6 */
+
+ /* Now, create the second packet. To do this, it is not enough to
+ just alter the length field, but we must also update the TCP
+ sequence number and point the uip_appdata to a new place in
+ memory. This place is determined by the length of the first
+ packet (len1). */
+ uip_len = len2 + UIP_TCPIP_HLEN + UIP_LLH_LEN;
+#if UIP_CONF_IPV6
+ /* For IPv6, the IP length field does not include the IPv6 IP header
+ length. */
+ BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
+ BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
+#else /* UIP_CONF_IPV6 */
+ BUF->len[0] = (uip_len - UIP_LLH_LEN) >> 8;
+ BUF->len[1] = (uip_len - UIP_LLH_LEN) & 0xff;
+#endif /* UIP_CONF_IPV6 */
+
+ memcpy(uip_appdata, (u8_t *)uip_appdata + len1, len2);
+
+ uip_add32(BUF->seqno, len1);
+ BUF->seqno[0] = uip_acc32[0];
+ BUF->seqno[1] = uip_acc32[1];
+ BUF->seqno[2] = uip_acc32[2];
+ BUF->seqno[3] = uip_acc32[3];
+
+ /* Recalculate the TCP checksum. */
+ BUF->tcpchksum = 0;
+ BUF->tcpchksum = ~(uip_tcpchksum());
+
+#if !UIP_CONF_IPV6
+ /* Recalculate the IP checksum. */
+ BUF->ipchksum = 0;
+ BUF->ipchksum = ~(uip_ipchksum());
+#endif /* UIP_CONF_IPV6 */
+
+ /* Transmit the second packet. */
+#if UIP_CONF_IPV6
+ tcpip_ipv6_output();
+#else
+ if (USB_CurrentMode == USB_MODE_Device)
+ RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len);
+ else
+ RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, uip_len);
+#endif /* UIP_CONF_IPV6 */
+ return;
+ }
+#endif /* UIP_TCP */
+
+ /* uip_fw_output();*/
+#if UIP_CONF_IPV6
+ tcpip_ipv6_output();
+#else
+ if (USB_CurrentMode == USB_MODE_Device)
+ RNDIS_Device_SendPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, uip_len);
+ else
+ RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, uip_len);
+#endif /* UIP_CONF_IPV6 */
+}
+
+/*-----------------------------------------------------------------------------*/
+
projects / pub / USBasp.git / blobdiff