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 = sendpack.o
LIBS = -L ${PCAP_PATH} -lwpcap
all: ${OBJS}
${CC} ${CFLAGS} -o sendpack.exe ${OBJS} ${LIBS}
clean:
rm -f ${OBJS} sendpack.exe
.c.o:
${CC} ${CFLAGS} -c -o $*.o $<

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#include <stdlib.h>
#include <stdio.h>
#include <pcap.h>
#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
int main(int argc, char **argv)
{
pcap_t *fp;
char errbuf[PCAP_ERRBUF_SIZE];
u_char packet[100];
int i;
#ifdef WIN32
/* Load Npcap and its functions. */
if (!LoadNpcapDlls())
{
fprintf(stderr, "Couldn't load Npcap\n");
exit(1);
}
#endif
/* Check the validity of the command line */
if (argc != 2)
{
printf("usage: %s interface", argv[0]);
return 1;
}
/* Open the adapter */
if ((fp = pcap_open_live(argv[1], // name of the device
65536, // portion of the packet to capture. It doesn't matter in this case
1, // promiscuous mode (nonzero means promiscuous)
1000, // read timeout
errbuf // error buffer
)) == NULL)
{
fprintf(stderr,"\nUnable to open the adapter. %s is not supported by Npcap\n", argv[1]);
return 2;
}
/* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */
packet[0]=1;
packet[1]=1;
packet[2]=1;
packet[3]=1;
packet[4]=1;
packet[5]=1;
/* set mac source to 2:2:2:2:2:2 */
packet[6]=2;
packet[7]=2;
packet[8]=2;
packet[9]=2;
packet[10]=2;
packet[11]=2;
/* Fill the rest of the packet */
for(i=12;i<100;i++)
{
packet[i]= (u_char)i;
}
/* Send down the packet */
if (pcap_sendpacket(fp, // Adapter
packet, // buffer with the packet
100 // size
) != 0)
{
fprintf(stderr,"\nError sending the packet: %s\n", pcap_geterr(fp));
return 3;
}
pcap_close(fp);
return 0;
}

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