/* KSysGuard, the KDE System Guard Copyright (c) 1999 - 2001 Chris Schlaeger This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation. 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include #include #include #include #include #include #include #include #include "Command.h" #include "ksysguardd.h" #include "netdev.h" #define MON_SIZE 128 #define CALC( a, b, c, d, e ) \ { \ NetDevs[ i ].a = a - NetDevs[ i ].Old##a; \ NetDevs[ i ].Old##a = a; \ } #define REGISTERSENSOR( a, b, c, d, e ) \ { \ snprintf( mon, MON_SIZE, "network/interfaces/%s/%s", tag, b ); \ registerMonitor( mon, "integer", printNetDev##a, printNetDev##a##Info, NetDevSM ); \ } #define UNREGISTERSENSOR( a, b, c, d, e ) \ { \ snprintf( mon, MON_SIZE, "network/interfaces/%s/%s", NetDevs[ i ].name, b ); \ removeMonitor( mon ); \ } #define DEFMEMBERS( a, b, c, d, e ) \ unsigned long long Old##a; \ unsigned long long a; \ unsigned long a##Scale; #define DEFVARS( a, b, c, d, e ) \ unsigned long long a; #define FORALL( a ) \ a( recBytes, "receiver/data", "Received Data", "kBytes/s", 1024 ) \ a( recPacks, "receiver/packets", "Received Packets", "1/s", 1 ) \ a( recErrs, "receiver/errors", "Receiver Errors", "1/s", 1 ) \ a( recDrop, "receiver/drops", "Receiver Drops", "1/s", 1 ) \ a( recFifo, "receiver/fifo", "Receiver FIFO Overruns", "1/s", 1 ) \ a( recFrame, "receiver/frame", "Receiver Frame Errors", "1/s", 1 ) \ a( recCompressed, "receiver/compressed", "Received Compressed Packets", "1/s", 1 ) \ a( recMulticast, "receiver/multicast", "Received Multicast Packets", "1/s", 1 ) \ a( sentBytes, "transmitter/data", "Sent Data", "kBytes/s", 1024 ) \ a( sentPacks, "transmitter/packets", "Sent Packets", "1/s", 1 ) \ a( sentErrs, "transmitter/errors", "Transmitter Errors", "1/s", 1 ) \ a( sentDrop, "transmitter/drops", "Transmitter Drops", "1/s", 1 ) \ a( sentFifo, "transmitter/fifo", "Transmitter FIFO overruns", "1/s", 1 ) \ a( sentColls, "transmitter/collisions", "Transmitter Collisions", "1/s", 1 ) \ a( sentCarrier, "transmitter/carrier", "Transmitter Carrier losses", "1/s", 1 ) \ a( sentCompressed, "transmitter/compressed", "Transmitter Compressed Packets", "1/s", 1 ) #define SETZERO( a, b, c, d, e ) \ a = 0; #define SETMEMBERZERO( a, b, c, d, e ) \ NetDevs[ i ].a = 0; \ NetDevs[ i ].a##Scale = e; #define DECLAREFUNC( a, b, c, d, e ) \ void printNetDev##a( const char* cmd ); \ void printNetDev##a##Info( const char* cmd ); typedef struct { FORALL( DEFMEMBERS ) char name[ 32 ]; } NetDevInfo; /* We have observed deviations of up to 5% in the accuracy of the timer * interrupts. So we try to measure the interrupt interval and use this * value to calculate timing dependant values. */ static float timeInterval = 0; static struct timeval lastSampling; static struct timeval currSampling; static struct SensorModul* NetDevSM; #define NETDEVBUFSIZE 4096 static char NetDevBuf[ NETDEVBUFSIZE ]; static int NetDevCnt = 0; static int Dirty = 0; static int NetDevOk = 0; static long OldHash = 0; #define MAXNETDEVS 64 static NetDevInfo NetDevs[ MAXNETDEVS ]; void processNetDev( void ); FORALL( DECLAREFUNC ) static int processNetDev_( void ) { int i; char format[ 32 ]; char devFormat[ 16 ]; char buf[ 1024 ]; char tag[ 64 ]; char* netDevBufP = NetDevBuf; sprintf( format, "%%%d[^\n]\n", (int)sizeof( buf ) - 1 ); sprintf( devFormat, "%%%ds", (int)sizeof( tag ) - 1 ); /* skip 2 first lines */ for ( i = 0; i < 2; i++ ) { sscanf( netDevBufP, format, buf ); buf[ sizeof( buf ) - 1 ] = '\0'; netDevBufP += strlen( buf ) + 1; /* move netDevBufP to next line */ } for ( i = 0; sscanf( netDevBufP, format, buf ) == 1; ++i ) { buf[ sizeof( buf ) - 1 ] = '\0'; netDevBufP += strlen( buf ) + 1; /* move netDevBufP to next line */ if ( sscanf( buf, devFormat, tag ) ) { char* pos = (char*)strchr( tag, ':' ); if ( pos ) { FORALL( DEFVARS ); *pos = '\0'; FORALL( SETZERO ); sscanf( buf + 7, "%llu %llu %llu %llu %llu %llu %llu %llu " "%llu %llu %llu %llu %llu %llu %llu %llu", &recBytes, &recPacks, &recErrs, &recDrop, &recFifo, &recFrame, &recCompressed, &recMulticast, &sentBytes, &sentPacks, &sentErrs, &sentDrop, &sentFifo, &sentColls, &sentCarrier, &sentCompressed ); if ( i >= NetDevCnt || strcmp( NetDevs[ i ].name, tag ) != 0 ) { /* The network device configuration has changed. We * need to reconfigure the netdev module. */ return -1; } else { FORALL( CALC ); } } } } if ( i != NetDevCnt ) return -1; /* save exact time inverval between this and the last read of * /proc/net/dev */ timeInterval = currSampling.tv_sec - lastSampling.tv_sec + ( currSampling.tv_usec - lastSampling.tv_usec ) / 1000000.0; lastSampling = currSampling; Dirty = 0; return 0; } void processNetDev( void ) { int i; if ( NetDevCnt == 0 ) return; for ( i = 0; i < 5 && processNetDev_() < 0; ++i ) checkNetDev(); /* If 5 reconfiguration attemts failed, something is very wrong and * we close the netdev module for further use. */ if ( i == 5 ) exitNetDev(); } /* ================================ public part ================================= */ void initNetDev( struct SensorModul* sm ) { int i; char format[ 32 ]; char devFormat[ 16 ]; char buf[ 1024 ]; char tag[ 64 ]; char* netDevBufP = NetDevBuf; NetDevSM = sm; if ( updateNetDev() < 0 ) return; sprintf( format, "%%%d[^\n]\n", (int)sizeof( buf ) - 1 ); sprintf( devFormat, "%%%ds", (int)sizeof( tag ) - 1 ); /* skip 2 first lines */ for ( i = 0; i < 2; i++ ) { sscanf( netDevBufP, format, buf ); buf[ sizeof( buf ) - 1 ] = '\0'; netDevBufP += strlen( buf ) + 1; /* move netDevBufP to next line */ } for ( i = 0; sscanf( netDevBufP, format, buf ) == 1; ++i ) { buf[ sizeof( buf ) - 1 ] = '\0'; netDevBufP += strlen( buf ) + 1; /* move netDevBufP to next line */ if ( sscanf( buf, devFormat, tag ) ) { char* pos = (char*)strchr( tag, ':' ); if ( pos ) { char mon[ MON_SIZE ]; *pos = '\0'; strlcpy( NetDevs[ i ].name, tag, sizeof( NetDevs[ i ].name ) ); FORALL( REGISTERSENSOR ); sscanf( pos + 1, "%llu %llu %llu %llu %llu %llu %llu %llu" "%llu %llu %llu %llu %llu %llu %llu %llu", &NetDevs[ i ].recBytes, &NetDevs[ i ].recPacks, &NetDevs[ i ].recErrs, &NetDevs[ i ].recDrop, &NetDevs[ i ].recFifo, &NetDevs[ i ].recFrame, &NetDevs[ i ].recCompressed, &NetDevs[ i ].recMulticast, &NetDevs[ i ].sentBytes, &NetDevs[ i ].sentPacks, &NetDevs[ i ].sentErrs, &NetDevs[ i ].sentDrop, &NetDevs[ i ].sentFifo, &NetDevs[ i ].sentColls, &NetDevs[ i ].sentCarrier, &NetDevs[ i ].sentCompressed ); NetDevCnt++; } FORALL( SETMEMBERZERO ); } } /* Call processNetDev to elimitate initial peek values. */ processNetDev(); } void exitNetDev( void ) { int i; for ( i = 0; i < NetDevCnt; ++i ) { char mon[ MON_SIZE ]; FORALL( UNREGISTERSENSOR ); } NetDevCnt = 0; } int updateNetDev( void ) { /* We read the information about the network interfaces from /proc/net/dev. The file should look like this: Inter-| Receive | Transmit face | bytes packets errs drop fifo frame compressed multicast| bytes packets errs drop fifo colls carrier compressed lo:275135772 1437448 0 0 0 0 0 0 275135772 1437448 0 0 0 0 0 0 eth0:123648812 655251 0 0 0 0 0 0 246847871 889636 0 0 0 0 0 0 Inter-| Receive | Transmit face | bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed lo:275135772 1437448 0 0 0 0 0 0 275135772 1437448 0 0 0 0 0 0 eth0:123648812 655251 0 0 0 0 0 0 246847871 889636 0 0 0 0 0 0 */ size_t n; int fd; long hash; char* p; if ( NetDevOk < 0 ) return 0; if ( ( fd = open( "/proc/net/dev", O_RDONLY ) ) < 0 ) { /* /proc/net/dev may not exist on some machines. */ NetDevOk = -1; return 0; } if ( ( n = read( fd, NetDevBuf, NETDEVBUFSIZE - 1 ) ) == NETDEVBUFSIZE - 1 ) { log_error( "Internal buffer too small to read \'/proc/net/dev\'" ); NetDevOk = -1; close( fd ); return -1; } gettimeofday( &currSampling, 0 ); close( fd ); NetDevOk = 1; NetDevBuf[ n ] = '\0'; /* Calculate hash over the first 7 characters of each line starting * after the first newline. */ for ( p = NetDevBuf, hash = 0; *p; ++p ) if ( *p == '\n' ) for ( ++p; *p && *p != ':' && *p != '|'; ++p ) hash = ( ( hash << 6 ) + *p ) % 390389; if ( OldHash != 0 && OldHash != hash ) { print_error( "RECONFIGURE\n" ); CheckSetupFlag = 1; } OldHash = hash; Dirty = 1; return 0; } void checkNetDev( void ) { /* Values for other network devices are lost, but it is still better * than not detecting any new devices. TODO: Fix after 2.1 is out. */ exitNetDev(); initNetDev( NetDevSM ); } #define PRINTFUNC( a, b, c, d, e ) \ void printNetDev##a( const char* cmd ) \ { \ int i; \ char* beg; \ char* end; \ char dev[ 64 ]; \ \ beg = (char*)strchr( cmd, '/' ); \ beg = (char*)strchr( beg + 1, '/' ); \ end = (char*)strchr( beg + 1, '/' ); \ strncpy( dev, beg + 1, end - beg - 1 ); \ dev[ end - beg - 1 ] = '\0'; \ \ if ( Dirty ) \ processNetDev(); \ \ for ( i = 0; i < MAXNETDEVS; ++i ) \ if ( strcmp( NetDevs[ i ].name, dev ) == 0) { \ fprintf( CurrentClient, "%lu\n", (unsigned long) \ ( NetDevs[ i ].a / ( NetDevs[ i ].a##Scale * timeInterval ) ) ); \ return; \ } \ \ fprintf( CurrentClient, "0\n" ); \ } \ \ void printNetDev##a##Info( const char* cmd ) \ { \ (void)cmd; \ fprintf( CurrentClient, "%s\t0\t0\t%s\n", c, d ); \ } FORALL( PRINTFUNC )