Changeset c837874

Timestamp:

07/21/04 11:03:53 (16 years ago)

Author:

Daniel Lawson <dlawson@…>

Branches:

4.0.1-hotfixes, cachetimestamps, develop, dpdk-ndag, etsilive, getfragoff, help, libtrace4, master, ndag_format, pfring, rc-4.0.1, rc-4.0.2, rc-4.0.3, rc-4.0.4, ringdecrementfix, ringperformance, ringtimestampfixes

Children:

e9f521e

Parents:

be54c88

Message:

added ipcksum test
removed default uri

File:

• examples/protocol/protocol.c (modified) (2 diffs)

examples/protocol/protocol.c

@@ -41 +41 @@
 
 #include <linux/types.h>
-#include <linux/linkage.h>
-#define  access_ok(type,addr,size) 1
-#include <asm/checksum.h>
+//#include <linux/linkage.h>
+//#define  access_ok(type,addr,size) 1
+
+static inline unsigned short ip_fast_csum(unsigned char * iph,
+                                          unsigned int ihl) {
+        unsigned int sum;
+
+        __asm__ __volatile__("
+            movl (%1), %0
+            subl $4, %2
+            jbe 2f
+            addl 4(%1), %0
+            adcl 8(%1), %0
+            adcl 12(%1), %0
+1:          adcl 16(%1), %0
+            lea 4(%1), %1
+            decl %2
+            jne 1b
+            adcl $0, %0
+            movl %0, %2
+            shrl $16, %0
+            addw %w2, %w0
+            adcl $0, %0
+            notl %0
+2:
+            "
+        /* Since the input registers which are loaded with iph and ipl
+           are modified, we must also specify them as outputs, or gcc
+           will assume they contain their original values. */
+        : "=r" (sum), "=r" (iph), "=r" (ihl)
+        : "1" (iph), "2" (ihl));
+        return(sum);
+}
+
 #define  IN_CHKSUM(IP)  ip_fast_csum((unsigned char *)(IP), 5)
+
 
 #include "libtrace.h"
@@ -88 +120 @@
                 ipptr = get_ip(trace,buffer,4096);
 
-                if(do_cksum && IN_CHKSUM(ipptr)) {
-                        badchksum ++;
-                } else if (do_w_cksum && ipptr->ip_sum) {
-                        badchksum ++;
-                } else {
-                        if (ipptr) {
+                if (ipptr) {
+                        if(do_cksum && IN_CHKSUM(ipptr)) {
+                                badchksum ++;
+                        } else if (do_w_cksum && ipptr->ip_sum) {
+                                badchksum ++;
+                        } else {
                                 printf("%d:%d\n",ipptr->ip_p,get_link_type(trace,buffer,4096));
                         }