*\r
* $Id: uip-split.c,v 1.2 2006/06/12 08:00:30 adam Exp $\r
*/\r
-\r
#include <string.h>\r
\r
#include "uip-split.h"\r
#include "uip-fw.h"\r
#include "uip_arch.h"\r
\r
-\r
-\r
-#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])\r
+#define BUF ( ( struct uip_tcpip_hdr * ) &uip_buf[UIP_LLH_LEN] )\r
\r
/*-----------------------------------------------------------------------------*/\r
-void\r
-uip_split_output(void)\r
+void uip_split_output( void )\r
{\r
- u16_t tcplen, len1, len2;\r
+ u16_t tcplen, len1, len2;\r
\r
- /* We only try to split maximum sized TCP segments. */\r
- if(BUF->proto == UIP_PROTO_TCP &&\r
- uip_len == UIP_BUFSIZE - UIP_LLH_LEN) {\r
+ /* We only try to split maximum sized TCP segments. */\r
+ if( BUF->proto == UIP_PROTO_TCP && uip_len == UIP_BUFSIZE - UIP_LLH_LEN )\r
+ {\r
+ tcplen = uip_len - UIP_TCPIP_HLEN;\r
\r
- tcplen = uip_len - UIP_TCPIP_HLEN;\r
- /* Split the segment in two. If the original packet length was\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
+ len1 = len2 = tcplen / 2;\r
+ if( len1 + len2 < tcplen )\r
+ {\r
+ ++len2;\r
+ }\r
\r
- /* Create the first packet. This is done by altering the length\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;\r
-#if UIP_CONF_IPV6\r
- /* For IPv6, the IP length field does not include the IPv6 IP header\r
+ uip_len = len1 + UIP_TCPIP_HLEN;\r
+ #if UIP_CONF_IPV6\r
+\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 >> 8;\r
- BUF->len[1] = uip_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
- /* uip_fw_output();*/\r
-// tcpip_output();\r
-\r
- /* Now, create the second packet. To do this, it is not enough to\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 >> 8;\r
+ BUF->len[1] = uip_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
+\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
+\r
+ /* uip_fw_output();*/\r
+\r
+ // tcpip_output();\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;\r
-#if UIP_CONF_IPV6\r
- /* For IPv6, the IP length field does not include the IPv6 IP header\r
+ uip_len = len2 + UIP_TCPIP_HLEN;\r
+ #if UIP_CONF_IPV6\r
+\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 >> 8;\r
- BUF->len[1] = uip_len & 0xff;\r
-#endif /* UIP_CONF_IPV6 */\r
-\r
- /* uip_appdata += len1;*/\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
- /* uip_fw_output();*/\r
-// tcpip_output();\r
- } else {\r
- /* uip_fw_output();*/\r
-// tcpip_output();\r
- }\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 >> 8;\r
+ BUF->len[1] = uip_len & 0xff;\r
+ #endif /* UIP_CONF_IPV6 */\r
+\r
+ /* uip_appdata += len1;*/\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
\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
+\r
+ /* uip_fw_output();*/\r
+\r
+ // tcpip_output();\r
+ }\r
+ else\r
+ {\r
+ /* uip_fw_output();*/\r
+\r
+ // tcpip_output();\r
+ }\r
}\r
+\r
/*-----------------------------------------------------------------------------*/\r
projects / freertos / blobdiff