FOSS/nethogs
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make a 'runtests' make target that runs some 'unit test'-like tests. Fix crash when uid's without a password entry are encountered, return the uid as a string instead.

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This commit is contained in:
Arnout Engelen
2012-03-15 22:31:28 +00:00
parent 2c04ca9267
commit 4ff973bbd7
11 changed files with 284 additions and 229 deletions
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190
nethogs.cpp
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@@ -106,6 +106,11 @@ struct dpargs {
in6_addr ip6_dst;
};
const char* getVersion()
{
return version;
}
int process_tcp (u_char * userdata, const dp_header * header, const u_char * m_packet) {
struct dpargs * args = (struct dpargs *) userdata;
struct tcphdr * tcp = (struct tcphdr *) m_packet;
@@ -222,7 +227,7 @@ void quit_cb (int /* i */)
exit(0);
}
void forceExit(const char *msg, int errcode, ...)
void forceExit(bool success, const char *msg, ...)
{
if ((!tracemode)&&(!DEBUG)){
exit_ui();
@@ -234,30 +239,10 @@ void forceExit(const char *msg, int errcode, ...)
va_end(argp);
std::cerr << std::endl;
exit(errcode);
}
static void versiondisplay(void)
{
std::cerr << version << "\n";
}
static void help(void)
{
//std::cerr << "usage: nethogs [-V] [-b] [-d seconds] [-t] [-p] [-f (eth|ppp))] [device [device [device ...]]]\n";
std::cerr << "usage: nethogs [-V] [-b] [-d seconds] [-t] [-p] [device [device [device ...]]]\n";
std::cerr << " -V : prints version.\n";
std::cerr << " -d : delay for update refresh rate in seconds. default is 1.\n";
std::cerr << " -t : tracemode.\n";
//std::cerr << " -f : format of packets on interface, default is eth.\n";
std::cerr << " -b : bughunt mode - implies tracemode.\n";
std::cerr << " -p : sniff in promiscious mode (not recommended).\n";
std::cerr << " device : device(s) to monitor. default is eth0\n";
std::cerr << std::endl;
std::cerr << "When nethogs is running, press:\n";
std::cerr << " q: quit\n";
std::cerr << " m: switch between total and kb/s mode\n";
if (success)
exit(EXIT_SUCCESS);
else
exit(EXIT_FAILURE);
}
class handle {
@@ -271,158 +256,3 @@ public:
handle * next;
};
int main (int argc, char** argv)
{
process_init();
device * devices = NULL;
//dp_link_type linktype = dp_link_ethernet;
int promisc = 0;
int opt;
while ((opt = getopt(argc, argv, "Vhbtpd:")) != -1) {
switch(opt) {
case 'V':
versiondisplay();
exit(0);
case 'h':
help();
exit(0);
case 'b':
bughuntmode = true;
tracemode = true;
break;
case 't':
tracemode = true;
break;
case 'p':
promisc = 1;
break;
case 'd':
refreshdelay=atoi(optarg);
break;
/*
case 'f':
argv++;
if (strcmp (optarg, "ppp") == 0)
linktype = dp_link_ppp;
else if (strcmp (optarg, "eth") == 0)
linktype = dp_link_ethernet;
}
break;
*/
default:
help();
exit(EXIT_FAILURE);
}
}
while (optind < argc) {
devices = new device (strdup(argv[optind++]), devices);
}
if (devices == NULL)
{
devices = determine_default_device();
}
if ((!tracemode) && (!DEBUG)){
init_ui();
}
if (NEEDROOT && (getuid() != 0))
forceExit("You need to be root to run NetHogs!", -2);
char errbuf[PCAP_ERRBUF_SIZE];
handle * handles = NULL;
device * current_dev = devices;
while (current_dev != NULL) {
getLocal(current_dev->name, tracemode);
if ((!tracemode) && (!DEBUG)){
//caption->append(current_dev->name);
//caption->append(" ");
}
dp_handle * newhandle = dp_open_live(current_dev->name, BUFSIZ, promisc, 100, errbuf);
if (newhandle != NULL)
{
dp_addcb (newhandle, dp_packet_ip, process_ip);
dp_addcb (newhandle, dp_packet_ip6, process_ip6);
dp_addcb (newhandle, dp_packet_tcp, process_tcp);
dp_addcb (newhandle, dp_packet_udp, process_udp);
/* The following code solves sf.net bug 1019381, but is only available
* in newer versions (from 0.8 it seems) of libpcap
*
* update: version 0.7.2, which is in debian stable now, should be ok
* also.
*/
if (dp_setnonblock (newhandle, 1, errbuf) == -1)
{
fprintf(stderr, "Error putting libpcap in nonblocking mode\n");
}
handles = new handle (newhandle, current_dev->name, handles);
}
else
{
fprintf(stderr, "Error opening handler for device %s\n", current_dev->name);
}
current_dev = current_dev->next;
}
signal (SIGALRM, &alarm_cb);
signal (SIGINT, &quit_cb);
alarm (refreshdelay);
fprintf(stderr, "Waiting for first packet to arrive (see sourceforge.net bug 1019381)\n");
// Main loop:
//
// Walks though the 'handles' list, which contains handles opened in non-blocking mode.
// This causes the CPU utilisation to go up to 100%. This is tricky:
while (1)
{
bool packets_read = false;
handle * current_handle = handles;
while (current_handle != NULL)
{
struct dpargs * userdata = (dpargs *) malloc (sizeof (struct dpargs));
userdata->sa_family = AF_UNSPEC;
currentdevice = current_handle->devicename;
int retval = dp_dispatch (current_handle->content, -1, (u_char *)userdata, sizeof (struct dpargs));
if (retval == -1 || retval == -2)
{
std::cerr << "Error dispatching" << std::endl;
}
else if (retval != 0)
{
packets_read = true;
}
free (userdata);
current_handle = current_handle->next;
}
if ((!DEBUG)&&(!tracemode))
{
// handle user input
ui_tick();
}
if (needrefresh)
{
do_refresh();
needrefresh = false;
}
// If no packets were read at all this iteration, pause to prevent 100%
// CPU utilisation;
if (!packets_read)
{
usleep(100);
}
}
}