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Diffstat (limited to 'pcap2tzsp.c')
-rw-r--r--pcap2tzsp.c100
1 files changed, 19 insertions, 81 deletions
diff --git a/pcap2tzsp.c b/pcap2tzsp.c
index bf175ea..16b6e56 100644
--- a/pcap2tzsp.c
+++ b/pcap2tzsp.c
@@ -22,70 +22,7 @@
This file is part of Pcap2tzsp. See LICENCE file.
*/
-/* Basics */
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h> /* Consider using msinttypes for Visual Studio */
-#include <signal.h>
-#include <string.h>
-
-#ifdef WIN32 /* snprintf compatiblity */
-#define my_snprintf sprintf_s
-#else
-#define my_snprintf snprintf
-#endif
-
-
-/* Packet capture stuff */
-#include <pcap.h>
-
-/* UDP stuff */
-#ifdef WIN32
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#else
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <unistd.h>
-#include <netdb.h> /* Name resolution */
-#define SOCKET int
-#define INVALID_SOCKET -1
-#endif
-
-/* Time management (for bwlimit) */
-#include <time.h>
-
-/* Args parsing and basename() for usage */
-#ifdef WIN32
-#undef _UNICODE
-#include <getopt.h> /* Consider using getopt4win for WIN32 */
-
- /* Poor's men hand-written basename.
- With calloc() and this is diffent from POSIX basename() */
- char * basename(const char *path) {
- errno_t e;
- size_t len1, len2;
- char filename[256], ext[8];
- char *res=NULL;
-
- e=_splitpath_s(path, NULL, 0, NULL, 0, filename, 256, ext, 8);
- if (e != 0) {
- res=strdup("");
- } else {
- len1=strlen(filename);
- len2=strlen(ext);
- res=calloc(len1+len2 + 1, sizeof(char));
- if ( res != NULL ) {
- strcpy_s(res, len1+1, filename);
- strcpy_s(res+len1, len2+1, ext);
- }
- }
- return res;
- }
-#else
-#include <getopt.h>
-#include <libgen.h>
-#endif
+#include "pcap2tzsp.h"
/* Option default values (as strings) */
#define DEFAULT_FILTER "not ( icmp[icmptype]=icmp-unreach or (udp and dst %s and port %s) )"
@@ -93,8 +30,8 @@
#define DEFAULT_PORT "37008"
#define DEFAULT_SNAPLEN "70"
-/* MAX_TZSP_PAYLOAD is for not trying to send TZSP packets greater than the interface MTU
- MAX_TZSP_PAYLOAD = MTU - IP header - UDP header - TZSP header
+/* MAX_TZSP_PAYLOAD is for not trying to send TZSP packets greater than the interface MTU
+ MAX_TZSP_PAYLOAD = MTU - IP header - UDP header - TZSP header
I am assuming the following :
- Layer 2 overhead is the same for the captured packet and the transmitted packet
- MTU is assumed to be 1500 for now
@@ -109,13 +46,14 @@
/*
TODO List
+ * Essayer WIN32_LEAN_AND_MEAN avec VS
* Implémenter une bwlimit en sortie (ptks/s et/ou bytes/s)
* Calcul dynamique de MAX_TZSP_PAYLOAD
*/
/* Functions declaration */
-int make_dgram_socket(char host[], char service[], int hint_flags, char **resolved_address);
-void start_capture_loop(char *pcap_filter);
+SOCKET make_dgram_socket(char host[], char service[], int hint_flags, char **resolved_address);
+void start_capture_loop(char *pcap_filter);
void process_packet(u_char *void_args, const struct pcap_pkthdr* pkthdr, const u_char * packet);
/* Custom types definition */
@@ -135,7 +73,7 @@ static char *opt_host=NULL;
static char *opt_port=NULL;
static char *opt_snaplen=NULL;
-pcap_t *pcap_handle = NULL;
+pcap_t *pcap_handle = NULL;
void usage(char progname[]) {
printf("Usage : %s [--verbose] [--brief] [-i <iface>] [-h <host>] [-p <port>] [custom_pcap_filter]\n", progname);
@@ -278,7 +216,7 @@ int main(int argc, char *argv[]) {
return 0;
}
-int make_dgram_socket(char host[], char service[], int hint_flags, char **resolved_address) {
+SOCKET make_dgram_socket(char host[], char service[], int hint_flags, char **resolved_address) {
/* Code taken from Client program example of getaddrinfo(3) manpage
Tweaks added for WIN32 "compatibility"
@@ -331,7 +269,7 @@ int make_dgram_socket(char host[], char service[], int hint_flags, char **resolv
/* This part was not in the example as is */
if ( resolved_address != NULL) {
/* If wanted, return numerical form of the choosen host address */
- if ( getnameinfo(rp->ai_addr, rp->ai_addrlen, hbuf,
+ if ( getnameinfo(rp->ai_addr, rp->ai_addrlen, hbuf,
NI_MAXHOST_NUMERIC, NULL, 0, NI_NUMERICHOST) == 0 ) {
*resolved_address=strdup(hbuf);
}
@@ -342,10 +280,10 @@ int make_dgram_socket(char host[], char service[], int hint_flags, char **resolv
}
-void start_capture_loop(char *pcap_filter) {
+void start_capture_loop(char *pcap_filter) {
//Global for signal handling
- //pcap_t *pcap_handle = NULL;
+ //pcap_t *pcap_handle = NULL;
char *resolved_address=NULL;
static char *pcap_device=NULL;
char pcap_errbuf[PCAP_ERRBUF_SIZE];
@@ -355,11 +293,11 @@ void start_capture_loop(char *pcap_filter) {
int snaplen, hints_flags, pcap_filter_synthetised=0;
size_t pcap_filter_len; /* size_t is "mandatory" for WIN32 */
- memset(pcap_errbuf,0,PCAP_ERRBUF_SIZE);
- memset(&process_packet_args,0,sizeof(process_packet_args_t));
+ memset(pcap_errbuf,0,PCAP_ERRBUF_SIZE);
+ memset(&process_packet_args,0,sizeof(process_packet_args_t));
if (opt_iface == NULL) {
- /* Get the name of the first device suitable for capture */
+ /* Get the name of the first device suitable for capture */
if ( (pcap_device = pcap_lookupdev(pcap_errbuf)) == NULL){
fprintf(stderr, "ERROR: %s\n", pcap_errbuf);
exit(20);
@@ -387,7 +325,7 @@ void start_capture_loop(char *pcap_filter) {
/* pcap init */
if (opt_verbose) printf("Opening device %s for capturing\n", pcap_device);
- /* Open device in promiscuous mode */
+ /* Open device in promiscuous mode */
if ( (pcap_handle = pcap_open_live(pcap_device, snaplen, 1, 512, pcap_errbuf)) == NULL){
fprintf(stderr, "ERROR: %s\n", pcap_errbuf);
exit(21);
@@ -419,7 +357,7 @@ void start_capture_loop(char *pcap_filter) {
pcap_freecode(&pcap_filter_prog);
- /* Loop forever & call process_packet() for every received packet */
+ /* Loop forever & call process_packet() for every received packet */
if ( pcap_loop(pcap_handle, -1, process_packet, (u_char *)&process_packet_args) == -1) {
fprintf(stderr, "ERROR: %s\n", pcap_geterr(pcap_handle) );
exit(25);
@@ -427,7 +365,7 @@ void start_capture_loop(char *pcap_filter) {
fprintf(stderr, "\n%u packets captured\n%u TZSP packets sent\n",
process_packet_args.captured_pkt_count, process_packet_args.sent_pkt_count);
-
+
if (pcap_stats(pcap_handle, &stat) == -1) {
fprintf(stderr, "ERROR: %s\n", pcap_geterr(pcap_handle) );
exit(26);
@@ -460,7 +398,7 @@ void process_packet(u_char *void_args, const struct pcap_pkthdr* pkthdr, const u
char buf[UDP_SEND_BUFLEN];
/* struct timespec ts_reqsleep; // For simulation */
- process_packet_args_t *args=(process_packet_args_t *)void_args;
+ process_packet_args_t *args=(process_packet_args_t *)void_args;
/* Catpured packet counting and displaying (max once by second) */
args->captured_pkt_count++;
@@ -495,7 +433,7 @@ void process_packet(u_char *void_args, const struct pcap_pkthdr* pkthdr, const u
buf[5]=0x04; /* Tag length == 4 bytes */
/* buf[6,7,8,9] Timestamp on 4 bytes (network order) */
- memcpy(buf+6, &field_ts, 4);
+ memcpy(buf+6, &field_ts, 4);
/* Wireshark don't dissect that */
//buf[10]=0x28; /* Tag type TAG_PACKET_COUNT */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 02:21:05 +0000