tcp/quic lab finished

This commit is contained in:
2025-12-25 14:33:29 +08:00
parent ac5b4bc15d
commit 200566e8fe
261 changed files with 2664 additions and 0 deletions

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# Makefile for cygwin gcc
# Nate Lawson <nate@rootlabs.com>
PCAP_PATH = ../../lib
CFLAGS = -g -O -mno-cygwin -I ../../include
OBJS = readfile.o
LIBS = -L ${PCAP_PATH} -lwpcap
all: ${OBJS}
${CC} ${CFLAGS} -o readfile.exe ${OBJS} ${LIBS}
clean:
rm -f ${OBJS} readfile.exe
.c.o:
${CC} ${CFLAGS} -c -o $*.o $<

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#include <stdio.h>
#include <pcap.h>
#define LINE_LEN 16
#ifdef WIN32
#include <tchar.h>
BOOL LoadNpcapDlls()
{
_TCHAR npcap_dir[512];
UINT len;
len = GetSystemDirectory(npcap_dir, 480);
if (!len) {
fprintf(stderr, "Error in GetSystemDirectory: %x", GetLastError());
return FALSE;
}
_tcscat_s(npcap_dir, 512, _T("\\Npcap"));
if (SetDllDirectory(npcap_dir) == 0) {
fprintf(stderr, "Error in SetDllDirectory: %x", GetLastError());
return FALSE;
}
return TRUE;
}
#endif
void dispatcher_handler(u_char *, const struct pcap_pkthdr *, const u_char *);
int main(int argc, char **argv)
{
pcap_t *fp;
char errbuf[PCAP_ERRBUF_SIZE];
#ifdef WIN32
/* Load Npcap and its functions. */
if (!LoadNpcapDlls())
{
fprintf(stderr, "Couldn't load Npcap\n");
exit(1);
}
#endif
if(argc != 2)
{
printf("usage: %s filename", argv[0]);
return -1;
}
/* Open the capture file */
if ((fp = pcap_open_offline(argv[1], // name of the device
errbuf // error buffer
)) == NULL)
{
fprintf(stderr,"\nUnable to open the file %s.\n", argv[1]);
return -1;
}
/* read and dispatch packets until EOF is reached */
pcap_loop(fp, 0, dispatcher_handler, NULL);
pcap_close(fp);
return 0;
}
void dispatcher_handler(u_char *temp1,
const struct pcap_pkthdr *header,
const u_char *pkt_data)
{
u_int i=0;
/*
* unused variable
*/
(VOID*)temp1;
/* print pkt timestamp and pkt len */
printf("%ld:%ld (%ld)\n", header->ts.tv_sec, header->ts.tv_usec, header->len);
/* Print the packet */
for (i=1; (i < header->caplen + 1 ) ; i++)
{
printf("%.2x ", pkt_data[i-1]);
if ( (i % LINE_LEN) == 0) printf("\n");
}
printf("\n\n");
}

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