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make 'forceexit' more fprintf-like, better error message when ioctl fails.

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This commit is contained in:
Arnout Engelen
2008-12-31 15:40:48 +00:00
parent cddd1d2e6c
commit 22a28e973e
3 changed files with 55 additions and 60 deletions
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44
nethogs.cpp
View File

@@ -10,6 +10,7 @@
#include <signal.h>
#include <string>
#include <string.h>
#include <stdarg.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
@@ -27,7 +28,7 @@ extern "C" {
#include "process.h"
#include "refresh.h"
extern Process * unknownudp;
extern Process * unknownudp;
unsigned refreshdelay = 1;
bool tracemode = false;
@@ -91,7 +92,7 @@ int process_tcp (u_char * userdata, const dp_header * header, const u_char * m_p
curtime = header->ts;
/* get info from userdata, then call getPacket */
Packet * packet;
Packet * packet;
switch (args->sa_family)
{
case (AF_INET):
@@ -133,7 +134,7 @@ int process_udp (u_char * userdata, const dp_header * header, const u_char * m_p
curtime = header->ts;
/* TODO get info from userdata, then call getPacket */
Packet * packet;
Packet * packet;
switch (args->sa_family)
{
case (AF_INET):
@@ -200,24 +201,19 @@ void quit_cb (int i)
exit(0);
}
void forceExit(const char *msg)
{
forceExit (msg, NULL);
}
void forceExit(const char *msg, const char* msg2)
void forceExit(const char *msg, ...)
{
if ((!tracemode)&&(!DEBUG)){
exit_ui();
}
std::cerr << msg;
if (msg2 != NULL)
{
std::cerr << msg2;
}
va_list argp;
va_start(argp, msg);
vfprintf(stderr, msg, argp);
va_end(argp);
std::cerr << std::endl;
exit(0);
exit(0);
}
static void versiondisplay(void)
@@ -255,7 +251,7 @@ public:
class handle {
public:
handle (dp_handle * m_handle, char * m_devicename = NULL,
handle (dp_handle * m_handle, char * m_devicename = NULL,
handle * m_next = NULL) {
content = m_handle; next = m_next; devicename = m_devicename;
}
@@ -317,7 +313,7 @@ int main (int argc, char** argv)
}
if (devices == NULL)
{
{
devices = new device (strdup("eth0"));
}
@@ -339,7 +335,7 @@ int main (int argc, char** argv)
//caption->append(" ");
}
dp_handle * newhandle = dp_open_live(current_dev->name, BUFSIZ, promisc, 100, errbuf);
dp_handle * newhandle = dp_open_live(current_dev->name, BUFSIZ, promisc, 100, errbuf);
if (newhandle != NULL)
{
dp_addcb (newhandle, dp_packet_ip, process_ip);
@@ -348,10 +344,10 @@ int main (int argc, char** argv)
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
* 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.
* also.
*/
if (dp_setnonblock (newhandle, 1, errbuf) == -1)
{
@@ -374,9 +370,9 @@ int main (int argc, char** argv)
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:
// This causes the CPU utilisation to go up to 100%. This is tricky:
while (1)
{
bool packets_read = false;
@@ -400,7 +396,7 @@ int main (int argc, char** argv)
current_handle = current_handle->next;
}
if ((!DEBUG)&&(!tracemode))
if ((!DEBUG)&&(!tracemode))
{
// handle user input
ui_tick();
@@ -408,7 +404,7 @@ int main (int argc, char** argv)
if (needrefresh)
{
do_refresh();
do_refresh();
needrefresh = false;
}

3
nethogs.h
View File

@@ -47,8 +47,7 @@
#define PROGNAME_WIDTH 27
void forceExit(const char *msg);
void forceExit(const char *msg, const char* msg2);
void forceExit(const char *msg, ...);
class local_addr {
public:

68
packet.cpp
View File

@@ -16,7 +16,7 @@
local_addr * local_addrs = NULL;
/* moves the pointer right until a non-space is seen */
char * stripspaces (char * input)
char * stripspaces (char * input)
{
char * retval = input;
while (*retval == ' ')
@@ -43,7 +43,7 @@ void getLocal (const char *device, bool tracemode)
}
strcpy(iFreq.ifr_name, device);
if(ioctl(sock, SIOCGIFADDR, &iFreq)<0){
forceExit("ioctl failed while establishing local IP for selected device ", device);
forceExit("ioctl failed while establishing local IP for selected device %s. You may specify the device on the command line.", device);
}
saddr=(struct sockaddr_in*)&iFreq.ifr_addr;
local_addrs = new local_addr (saddr->sin_addr.s_addr, local_addrs);
@@ -55,7 +55,7 @@ void getLocal (const char *device, bool tracemode)
/* also get local IPv6 addresses */
FILE * ifinfo = fopen ("/proc/net/if_inet6", "r");
char buffer [500];
if (ifinfo)
if (ifinfo)
{
do
{
@@ -67,7 +67,7 @@ void getLocal (const char *device, bool tracemode)
if (!ROBUST)
assert (n_results = 2);
if (strcmp (stripspaces(ifname), device) == 0)
if (strcmp (stripspaces(ifname), device) == 0)
{
local_addrs = new local_addr (address, local_addrs);
}
@@ -103,32 +103,32 @@ struct ppp_header {
/* TCP header */
// TODO take from elsewhere.
struct tcp_hdr {
u_short th_sport; /* source port */
u_short th_dport; /* destination port */
tcp_seq th_seq; /* sequence number */
tcp_seq th_ack; /* acknowledgement number */
#if BYTE_ORDER == LITTLE_ENDIAN
u_int th_x2:4, /* (unused) */
th_off:4; /* data offset */
#endif
#if BYTE_ORDER == BIG_ENDIAN
u_int th_off:4, /* data offset */
th_x2:4; /* (unused) */
#endif
u_char th_flags;
#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_PUSH 0x08
#define TH_ACK 0x10
#define TH_URG 0x20
#define TH_ECE 0x40
#define TH_CWR 0x80
#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
u_short th_win; /* window */
u_short th_sum; /* checksum */
u_short th_urp; /* urgent pointer */
};
u_short th_sport; /* source port */
u_short th_dport; /* destination port */
tcp_seq th_seq; /* sequence number */
tcp_seq th_ack; /* acknowledgement number */
#if BYTE_ORDER == LITTLE_ENDIAN
u_int th_x2:4, /* (unused) */
th_off:4; /* data offset */
#endif
#if BYTE_ORDER == BIG_ENDIAN
u_int th_off:4, /* data offset */
th_x2:4; /* (unused) */
#endif
u_char th_flags;
#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_PUSH 0x08
#define TH_ACK 0x10
#define TH_URG 0x20
#define TH_ECE 0x40
#define TH_CWR 0x80
#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
u_short th_win; /* window */
u_short th_sum; /* checksum */
u_short th_urp; /* urgent pointer */
};
Packet::Packet (in_addr m_sip, unsigned short m_sport, in_addr m_dip, unsigned short m_dport, u_int32_t m_len, timeval m_time, direction m_dir)
{
sip = m_sip; sport = m_sport;
@@ -158,8 +158,8 @@ Packet * Packet::newInverted () {
/* constructs returns a new Packet() structure with the same contents as this one */
Packet::Packet (const Packet &old_packet) {
sip = old_packet.sip; sport = old_packet.sport;
sip6 = old_packet.sip6;
dip6 = old_packet.dip6;
sip6 = old_packet.sip6;
dip6 = old_packet.dip6;
dip = old_packet.dip; dport = old_packet.dport;
len = old_packet.len; time = old_packet.time;
sa_family = old_packet.sa_family;
@@ -256,10 +256,10 @@ char * Packet::gethashstring ()
return hashstring;
}
/* 2 packets match if they have the same
/* 2 packets match if they have the same
* source and destination ports and IP's. */
bool Packet::match (Packet * other)
{
return (sport == other->sport) && (dport == other->dport)
return (sport == other->sport) && (dport == other->dport)
&& (sameinaddr(sip, other->sip)) && (sameinaddr(dip, other->dip));
}