arti/wrapsix
1
0
Fork 0
mirror of https://code.semirocket.science/wrapsix synced 2025-12-08 09:55:13 +02:00
Code Activity

Specialized logging functions; can control debug

Browse Source
This commit is contained in:
Michal Zima
2012-07-04 11:37:42 +02:00
parent fbbf20ba0a
commit 34025797b1
15 changed files with 254 additions and 104 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/wrapper.c
View File

@@ -22,7 +22,6 @@
#include <netpacket/packet.h> /* struct packet_mreq, struct sockaddr_ll */
#include <netinet/in.h> /* htons */
#include <net/ethernet.h> /* ETHERTYPE_* */
#include <stdio.h>
#include <stdlib.h> /* srand */
#include <string.h> /* strncpy */
#include <sys/ioctl.h> /* ioctl, SIOCGIFINDEX */
@@ -33,6 +32,7 @@
#include "ethernet.h"
#include "ipv4.h"
#include "ipv6.h"
#include "log.h"
#include "nat.h"
#include "transmitter.h"
#include "wrapper.h"
@@ -63,16 +63,18 @@ int main(int argc, char **argv)
int length;
char buffer[MTU];
log_info(PACKAGE_STRING " is starting");
/* initialize the socket for sniffing */
if ((sniff_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) == -1) {
fprintf(stderr, "[Error] Unable to create listening socket\n");
log_error("Unable to create listening socket");
return 1;
}
/* get the interface */
strncpy(interface.ifr_name, INTERFACE, IFNAMSIZ);
if (ioctl(sniff_sock, SIOCGIFINDEX, &interface) == -1) {
fprintf(stderr, "[Error] Unable to get the interface\n");
log_error("Unable to get the interface");
return 1;
}
@@ -82,11 +84,11 @@ int main(int argc, char **argv)
/* reinitialize the interface */
if (ioctl(sniff_sock, SIOCGIFINDEX, &interface) == -1) {
fprintf(stderr, "[Error] Unable to reinitialize the interface\n");
log_error("Unable to reinitialize the interface");
return 1;
}
} else {
fprintf(stderr, "[Error] Unable to get the interface's HW address\n");
log_error("Unable to get the interface's HW address");
return 1;
}
@@ -95,7 +97,7 @@ int main(int argc, char **argv)
pmr.mr_ifindex = interface.ifr_ifindex;
pmr.mr_type = PACKET_MR_PROMISC;
if (setsockopt(sniff_sock, SOL_PACKET, PACKET_ADD_MEMBERSHIP, (char *) &pmr, sizeof(pmr)) == -1) {
fprintf(stderr, "[Error] Unable to set the promiscuous mode on the interface\n");
log_error("Unable to set the promiscuous mode on the interface");
return 1;
}
@@ -111,7 +113,7 @@ int main(int argc, char **argv)
/* initiate sending socket */
if (transmission_init()) {
fprintf(stderr, "[Error] Unable to initiate sending socket\n");
log_error("Unable to initiate sending socket");
return 1;
}
@@ -125,7 +127,7 @@ int main(int argc, char **argv)
for (;;) {
addr_size = sizeof(addr);
if ((length = recv(sniff_sock, buffer, MTU, 0)) == -1) {
fprintf(stderr, "[Error] Unable to retrieve data from socket\n");
log_error("Unable to retrieve data from socket");
return 1;
}
@@ -141,7 +143,7 @@ int main(int argc, char **argv)
/* unset the promiscuous mode */
if (setsockopt(sniff_sock, SOL_PACKET, PACKET_DROP_MEMBERSHIP, (char *) &pmr, sizeof(pmr)) == -1) {
fprintf(stderr, "[Error] Unable to unset the promiscuous mode on the interface\n");
log_error("Unable to unset the promiscuous mode on the interface");
/* do not call `return` here as we want to close the socket too */
}
@@ -162,16 +164,16 @@ int process(char *packet)
switch (htons(eth->type)) {
case ETHERTYPE_IP:
printf("[Debug] HW Protocol: IPv4\n");
log_debug("HW Protocol: IPv4");
return ipv4(eth, payload);
case ETHERTYPE_IPV6:
printf("[Debug] HW Protocol: IPv6\n");
log_debug("HW Protocol: IPv6");
return ipv6(eth, payload);
case ETHERTYPE_ARP:
printf("[Debug] HW Protocol: ARP\n");
log_debug("HW Protocol: ARP");
return arp(eth, payload);
default:
printf("[Debug] HW Protocol: unknown [%d/0x%04x]\n",
log_debug("HW Protocol: unknown [%d/0x%04x]",
htons(eth->type), htons(eth->type));
return 1;
}