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Diffstat (limited to 'nuttx/net/uip/uip-split.c')
| -rw-r--r-- | nuttx/net/uip/uip-split.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/nuttx/net/uip/uip-split.c b/nuttx/net/uip/uip-split.c deleted file mode 100644 index 68b19d275..000000000 --- a/nuttx/net/uip/uip-split.c +++ /dev/null @@ -1,144 +0,0 @@ -/* uip-split.c - * Author: Adam Dunkels <adam@sics.se> - * - * 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. - */ - -#include <nuttx/config.h> -#include <string.h> - -#include <net/uip/uip.h> -#include <net/uip/uip-arch.h> - -#include "uip-split.h" -#include "uip-fw.h" - -#define BUF ((struct uip_tcpip_hdr *)&dev->d_buf[UIP_LLH_LEN]) - -void uip_split_output(struct uip_driver_s *dev) -{ - uint16 tcplen; - uint16 len1; - uint16 len2; - - /* We only try to split maximum sized TCP segments. */ - - if (BUF->proto == UIP_PROTO_TCP && - dev->d_len == CONFIG_NET_BUFSIZE - UIP_LLH_LEN) - { - tcplen = dev->d_len - UIP_TCPIP_HLEN; - - /* 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. - */ - - dev->d_len = len1 + UIP_TCPIP_HLEN; -#ifdef CONFIG_NET_IPv6 - /* For IPv6, the IP length field does not include the IPv6 IP header - * length. - */ - BUF->len[0] = ((dev->d_len - UIP_IPH_LEN) >> 8); - BUF->len[1] = ((dev->d_len - UIP_IPH_LEN) & 0xff); -#else /* CONFIG_NET_IPv6 */ - BUF->len[0] = dev->d_len >> 8; - BUF->len[1] = dev->d_len & 0xff; -#endif /* CONFIG_NET_IPv6 */ - - /* Recalculate the TCP checksum. */ - - BUF->tcpchksum = 0; - BUF->tcpchksum = ~(uip_tcpchksum(dev)); - -#ifndef CONFIG_NET_IPv6 - /* Recalculate the IP checksum. */ - - BUF->ipchksum = 0; - BUF->ipchksum = ~(uip_ipchksum(dev)); -#endif /* CONFIG_NET_IPv6 */ - - /* Transmit the first packet. */ - /* uip_fw_output();*/ - tcpip_output(); - - /* 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 d_appdata to a new place in - * memory. This place is detemined by the length of the first - * packet (len1). - */ - - dev->d_len = len2 + UIP_TCPIP_HLEN; -#ifdef CONFIG_NET_IPv6 - /* For IPv6, the IP length field does not include the IPv6 IP header - * length. - */ - - BUF->len[0] = ((dev->d_len - UIP_IPH_LEN) >> 8); - BUF->len[1] = ((dev->d_len - UIP_IPH_LEN) & 0xff); -#else /* CONFIG_NET_IPv6 */ - BUF->len[0] = dev->d_len >> 8; - BUF->len[1] = dev->d_len & 0xff; -#endif /* CONFIG_NET_IPv6 */ - - /* dev->d_appdata += len1;*/ - memcpy(dev->d_appdata, dev->d_appdata + len1, len2); - - uip_incr32(BUF->seqno, len1); - - /* Recalculate the TCP checksum. */ - - BUF->tcpchksum = 0; - BUF->tcpchksum = ~(uip_tcpchksum(dev)); - -#ifndef CONFIG_NET_IPv6 - /* Recalculate the IP checksum. */ - - BUF->ipchksum = 0; - BUF->ipchksum = ~(uip_ipchksum(dev)); -#endif /* CONFIG_NET_IPv6 */ - - /* Transmit the second packet. */ - /* uip_fw_output();*/ - tcpip_output(); - } - else - { - /* uip_fw_output();*/ - tcpip_output(); - } -} |