new file mode 100644

@@ -0,0 +1 @@

+main

new file mode 100644

@@ -0,0 +1,2 @@

+all:

+	gcc -o main src/main.c src/dumpcode.c -I./ -fpack-struct=1

new file mode 100644

Binary files /dev/null and b/data/sample.pcap differ

new file mode 100644

@@ -0,0 +1,45 @@

+/*!

+ *  @file    dumpcode.c

+ *  @author  Kang IkSeon (ikseon1026@gmail.com)

+ *

+ *  @internal

+ *       Created:  2018년 01월 30일

+ *     Copyright:  Copyright (c) 2018, Kang IkSeon

+ */

+

+#include <stdio.h>

+#include <ctype.h>

+

+#include "src/dumpcode.h"

+

+void printchar(unsigned char c) {

+    if (isprint(c))

+        printf("%c", c);

+    else

+        printf(".");

+}

+

+void dumpcode(void *ptr, int len) {

+    int i;

+    for (i=0; i < len; i++) {

+        if (i%16 == 0)

+            printf("%p  ", ((unsigned char *)ptr + i));

+        printf("%02x ", ((unsigned char *)ptr)[i]);

+        if (i%16-15 == 0) {

+            int j;

+            printf("  ");

+            for (j=i-15; j <= i; j++)

+                printchar(((unsigned char *)ptr)[j]);

+            printf("\n");

+        }

+    }

+    if (i%16 != 0) {

+        int j;

+        int spaces = (len-i+16-i%16)*3+2;

+        for (j=0; j < spaces; j++)

+            printf(" ");

+        for (j=i-i%16; j < len; j++)

+            printchar(((unsigned char *)ptr)[j]);

+    }

+    printf("\n");

+}

new file mode 100644

@@ -0,0 +1,19 @@

+/*!

+ *  @file    dumpcode.h

+ *  @author  Kang IkSeon (ikseon1026@gmail.com)

+ *

+ *  @internal

+ *       Created:  2018년 01월 30일

+ *     Copyright:  Copyright (c) 2018, Kang IkSeon

+ */

+

+#ifndef SRC_DUMPCODE_H_

+#define SRC_DUMPCODE_H_

+

+/*

+ * 오하라님께서 개발하신 dumpcode

+ */

+void printchar(unsigned char c);

+void dumpcode(void *ptr, int len);

+

+#endif  // SRC_DUMPCODE_H_

new file mode 100644

@@ -0,0 +1,68 @@

+/*!

+ *  @file    main.c

+ *  @author  Kang IkSeon (ikseon1026@gmail.com)

+ *

+ *  @internal

+ *       Created:  2018년 01월 30일

+ *     Copyright:  Copyright (c) 2018, Kang IkSeon

+ */

+

+#include <stdio.h>

+#include <stdint.h>

+

+#include "src/dumpcode.h"

+

+#define MAX 4096

+#define SAMPLE "data/sample.pcap"

+

+typedef struct pcap_hdr_s {

+  uint32_t magic_number;   /* magic number */

+  uint16_t version_major;  /* major version number */

+  uint16_t version_minor;  /* minor version number */

+  int32_t  thiszone;       /* GMT to local correction */

+  uint32_t sigfigs;        /* accuracy of timestamps */

+  uint32_t snaplen;        /* max length of captured packets, in octets */

+  uint32_t network;        /* data link type */

+} pcap_hdr_t;

+

+typedef struct pcaprec_hdr_s {

+  uint32_t ts_sec;         /* timestamp seconds */

+  uint32_t ts_usec;        /* timestamp microseconds */

+  uint32_t incl_len;       /* number of octets of packet saved in file */

+  uint32_t orig_len;       /* actual length of packet */

+} pcaprec_hdr_t;

+

+int main() {

+  int n, len;

+  char buffer[MAX];

+

+  pcap_hdr_t header;

+  pcaprec_hdr_t packet;

+

+  FILE *fp;

+

+  if (!(fp= fopen(SAMPLE, "r"))) {

+    return 1;

+  }

+

+  n = fread(&header, 1, sizeof(header), fp);

+

+  printf("version : %d.%d\n\n",

+      header.version_major, header.version_minor);

+

+  while (1) {

+    if (fread(&packet, 1, sizeof(packet), fp) <= 0) break;

+    len = packet.incl_len;

+

+    if (fread(buffer, 1, len, fp) <= 0) break;

+

+    printf("packet length : %d [%d.%d]\n",

+        packet.incl_len, packet.ts_sec, packet.ts_usec);

+    dumpcode(buffer, len);

+    printf("\n");

+  }

+

+  fclose(fp);

+

+  return 0;

+}