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Add ifcounters program that displays interface counters

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This commit is contained in:
Babak Farrokhi 2018-11-14 12:55:28 +03:30
parent f6262327d6
commit 6112194e8e
2 changed files with 147 additions and 0 deletions
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24
ifcounters/Makefile Normal file
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CC?=
PREFIX?=/usr/local
CPPFLAGS=-I$(PREFIX)/include
CFLAGS=-Wall -Wextra -g -O2 -pipe -funroll-loops -ffast-math -fno-strict-aliasing
CFLAGS+=$(CPPFLAGS)
LDFLAGS=-L$(PREFIX)/lib
LDLIBS=-lm
RM?=rm -f
IFCOUNTERS = ifcounters
OBJ = ifcounters.o
all: $(IFCOUNTERS)
$(IFCOUNTERS): $(OBJ)
$(CC) $(LDFLAGS) $(OBJ) $(LDLIBS) -o $(IFCOUNTERS)
install: all
install -s -C $(IFCOUNTERS) $(PREFIX)/bin
clean:
$(RM) *.o *.a a.out core *.core temp.* $(IFCOUNTERS)
$(RM) -r *.dSYM

123
ifcounters/ifcounters.c Normal file
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#include <stdio.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
#define PACKAGE_NAME "ifcounters"
#define PACKAGE_VERSION "0.1"
void show_help()
{
printf(
"Usage: ifcounters [-v] [-h] [-b|-p|-e|-m|-q] interface\n" \
"\n" \
"Options:\n" \
" -b Input/Output Bytes counter\n" \
" -p Input/Output Unicast Packets counter\n" \
" -e Input/Output Errors counter\n" \
" -m Input/Output Multicast Packets counter\n" \
" -q Input/Output Queue Drops counter\n" \
" -v Display version information\n" \
" -h Display this help message\n"
);
}
void show_version()
{
printf("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
printf("Copyright (c) 2018 by Babak Farrokhi <babak@farrokhi.net>\n");
}
int main(int argc, char **argv)
{
struct ifaddrs *ifap, *ifa;
char *ifname, *param;
int flag, c;
flag = 0;
if (argc < 2) {
show_help();
exit(0);
}
while ((c = getopt(argc, argv, "hvb:p:e:m:q:")) != -1) {
switch (c) {
case 'h':
show_help();
exit(0);
case 'v':
show_version();
exit(0);
case 'b':
case 'p':
case 'e':
case 'm':
case 'q':
flag = c;
param = strdup(optarg);
break;
case '?':
default:
show_help();
printf("\n");
show_version();
exit(1);
}
}
argc -= optind;
argv += optind;
if (flag == 0) {
show_help();
exit(1);
}
if (getifaddrs(&ifap) != 0) {
fprintf(stderr, "error\n");
}
else {
for (ifa = ifap; ifa; ifa= ifa->ifa_next) {
ifname = ifa->ifa_name;
if (strcmp(ifa->ifa_name, param) == 0) {
switch (flag) {
case 'b':
printf("rbytes.value %lu\nobytes.value %lu\n", IFA_STAT(ibytes), IFA_STAT(obytes));
break;
case 'p':
printf("rpackets.value %lu\nopackets.value %lu\n", IFA_STAT(ipackets), IFA_STAT(opackets));
break;
case 'e':
printf("rerrors.value %lu\noerrors.value %lu\n", IFA_STAT(ierrors), IFA_STAT(oerrors));
break;
case 'm':
printf("rmcasts.value %lu\nomcasts.value %lu\n", IFA_STAT(imcasts), IFA_STAT(omcasts));
break;
case 'q':
printf("rqdrops.value %lu\noqdrops.value %lu\n", IFA_STAT(iqdrops), IFA_STAT(oqdrops));
break;
default:
printf("invalid flag");
exit(1);
}
exit(0);
}
while (ifa->ifa_next != NULL &&
(strcmp(ifa->ifa_next->ifa_name, ifname) == 0)) {
ifa = ifa->ifa_next;
}
}
printf("Unknown interface: %s\n", param);
exit(1);
}
}