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/*
Copyright (C) 1997,1998 Dimitrios P. Bouras
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
For author contact information, look in the README file.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>
#ifdef SUNOS41x
extern int socket(), ioctl(), sscanf(), printf(), pclose();
#elif defined(SUNOS5x)
#include <sys/sockio.h>
#else
/* Returns kernel revision number (10*major+minor). Only used on Linux to
figure out what kind of parsing format to use for /proc/net/dev output */
static int kernelRevNo(void)
{
int major, minor, ver = -1;
FILE *pfp;
pfp = popen("/bin/uname -r 2>&1", "r");
if (pfp != NULL && fscanf(pfp, "%d.%d.%*d", &major, &minor) > 1)
ver = major*10 + minor;
pclose(pfp);
return ver;
}
#endif
/* Gets interface address by reading /proc/net/route to make sure the
desired interface exists, and then requesting its address. For
SunOS-4.1.x/5.x, it parses the output of `netstat -nr` to avoid need
for group suid privileges. Returns pointer to a string representation
of the IP address, or NULL. */
char *IFAddr(char *IFName, int dest)
{
int skfd = -1, request = SIOCGIFADDR;
static char IP[16]={0};
struct ifreq ifr;
struct sockaddr_in *sinp;
skfd = socket(AF_INET, SOCK_DGRAM, 0); /* open net channel */
if (skfd < 0) /* make sure all is OK */
return NULL; /* if failed, bail out */
do {
strcpy(ifr.ifr_name, IFName);
if (dest) /* dest rather than src? */
request = SIOCGIFDSTADDR; /* yes, adjust request */
if (ioctl(skfd, request, &ifr) < 0) { /* get interface address */
close(skfd); /* if failed, close */
return NULL; /* socket and exit */
}
sinp = (struct sockaddr_in*)&ifr.ifr_addr; /* point to data */
} while (! sinp->sin_addr.s_addr); /* sometimes 0 returned */
close(skfd); /* close the socket */
strcpy(IP, inet_ntoa(sinp->sin_addr)); /* copy converted string */
return IP; /* return its address */
}
/* System dependent macros for pppAddr() */
#ifdef SUNOS41x
#define AddrOpen popen("/usr/ucb/netstat -nr", "r")
#define AddrScanf sscanf(routeLine, "%*s %*s %*s %*s %*s %s", IF)
#define AddrClose while (fgets(routeLine,128,infofp) != NULL); pclose(infofp)
#elif defined(SUNOS5x)
#define AddrOpen popen("/usr/bin/netstat -nr", "r")
#define AddrScanf sscanf(routeLine, "%*s %*s %*s %*s %*s %s", IF)
#define AddrClose while (fgets(routeLine,128,infofp) != NULL); pclose(infofp)
#else
#define AddrOpen fopen("/proc/net/route", "r")
#define AddrScanf sscanf(routeLine,"%s", IF)
#define AddrClose fclose(infofp)
#endif
char *pppAddr(char *IFName)
{
int IFLen = strlen(IFName);
FILE *infofp;
char routeLine[129], IF[8];
infofp = AddrOpen; /* open route info stream */
if (infofp == NULL) /* failed to open? */
return NULL; /* return NULL string */
while (fgets(routeLine, 128, infofp) != NULL) { /* open OK, read line */
if (AddrScanf) /* parse interface */
if (! strncmp(IF,IFName,IFLen)) { /* desired interface? */
AddrClose; /* close info stream */
return IFAddr(IF, 0); /* return its address */
}
}
AddrClose; /* nothing found, close */
return NULL; /* node and return NULL */
}
/* Using the /prod/net/dev entry, it parses and returns the sum
of TX and RX packets on the requested network interface. For
SunOS-4.1.x/5.x it parses the output of `netstat -n -I<IF>`
to avoid group suid privileges. */
/* System dependent macros for pppPkts() */
#ifdef SUNOS41x
#define PktsOpen popen(sprintf(line,"/usr/ucb/netstat -n -I%s",IFName), "r")
#define PktsScanf sscanf(line, "%s %*s %*s %*s %u %*s %u", \
interface, &recv, &trans)
#define PktsClose while (fgets(line,128,infofp) != NULL); pclose(infofp)
#elif defined(SUNOS5x)
#define PktsOpen popen((sprintf(line,"/usr/bin/netstat -n -I %s",IFName)) ? \
line:line, "r")
#define PktsScanf sscanf(line, "%s %*s %*s %*s %u %*s %u", \
interface, &recv, &trans)
#define PktsClose while (fgets(line,128,infofp) != NULL); pclose(infofp)
#else
#define PktsOpen fopen("/proc/net/dev", "r")
#define PktsScanf sscanf(line, ((kernelRevNo()>20) ? \
"%s %*s %u %*s %*s %*s %*s %*s %u": \
"%s %u %*s %*s %*s %*s %u"), \
interface, &recv, &trans)
#define PktsClose fclose(infofp)
#endif
unsigned pppPkts(char *IFName, unsigned long *pTX, unsigned long *pRX)
{
int IFLen = strlen(IFName);
FILE *infofp;
char line[129], interface[16];
unsigned recv = 0, trans = 0;
infofp = PktsOpen; /* open IF stats info stream */
while (fgets(line, 128, infofp) != NULL) {
PktsScanf; /* read line by line */
if (!strncmp(interface,IFName,IFLen)) { /* scanning for interface */
PktsClose; /* found, close info stream */
if (pTX) *pTX = trans; /* if return storage avail */
if (pRX) *pRX = recv; /* save TXed/RXed separately */
return (recv + trans); /* return total I/O packets */
}
}
PktsClose; /* close info stream */
if (pTX) *pTX = 0; /* indicate nothing found */
if (pRX) *pRX = 0;
return -1;
}
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