src/libstatgrab/network_stats.c

/*
 * i-scream libstatgrab
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307 USA
 *
 * $Id: network_stats.c,v 1.67 2004/04/08 10:56:13 tdb Exp $
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdlib.h>
#include <string.h>
#include "statgrab.h"
#include "vector.h"
#include "tools.h"
#include <time.h>
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <sys/sockio.h>
#include <unistd.h>
#endif
#ifdef LINUX
#include <stdio.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <ctype.h>
/* Stuff which could be defined by defining KERNEL, but 
 * that would be a bad idea, so we'll just declare it here
 */
typedef __uint8_t u8;
typedef __uint16_t u16;
typedef __uint32_t u32;
typedef __uint64_t u64;
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <unistd.h>
#endif
#ifdef ALLBSD
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <net/if_media.h>
#include <sys/ioctl.h>
#include <unistd.h>
#endif

static void network_stat_init(sg_network_io_stats *s) {
        s->interface_name = NULL;
        s->tx = 0;
        s->rx = 0;
        s->ipackets = 0;
        s->opackets = 0;
        s->ierrors = 0;
        s->oerrors = 0;
        s->collisions = 0;
}

static void network_stat_destroy(sg_network_io_stats *s) {
        free(s->interface_name);
}

VECTOR_DECLARE_STATIC(network_stats, sg_network_io_stats, 5,
                      network_stat_init, network_stat_destroy);

sg_network_io_stats *sg_get_network_io_stats(int *entries){
        int interfaces;
        sg_network_io_stats *network_stat_ptr;

#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *knp;
#endif

#ifdef LINUX
        FILE *f;
        /* Horrible big enough, but it should be easily big enough */
        char line[8096];
        regex_t regex;
        regmatch_t line_match[9];
#endif
#ifdef ALLBSD
        struct ifaddrs *net, *net_ptr;
        struct if_data *net_data;
#endif

#ifdef ALLBSD
        if(getifaddrs(&net) != 0){
                sg_set_error(SG_ERROR_GETIFADDRS, NULL);
                return NULL;
        }

        interfaces=0;
        
        for(net_ptr=net;net_ptr!=NULL;net_ptr=net_ptr->ifa_next){
                if(net_ptr->ifa_addr->sa_family != AF_LINK) continue;

                if (VECTOR_RESIZE(network_stats, interfaces + 1) < 0) {
                        return NULL;
                }
                network_stat_ptr=network_stats+interfaces;
                
                if (sg_update_string(&network_stat_ptr->interface_name,
                                     net_ptr->ifa_name) < 0) {
                        return NULL;
                }
                net_data=(struct if_data *)net_ptr->ifa_data;
                network_stat_ptr->rx=net_data->ifi_ibytes;
                network_stat_ptr->tx=net_data->ifi_obytes;
                network_stat_ptr->ipackets=net_data->ifi_ipackets;
                network_stat_ptr->opackets=net_data->ifi_opackets;
                network_stat_ptr->ierrors=net_data->ifi_ierrors;
                network_stat_ptr->oerrors=net_data->ifi_oerrors;
                network_stat_ptr->collisions=net_data->ifi_collisions;
                network_stat_ptr->systime=time(NULL);
                interfaces++;
        }
        freeifaddrs(net);       
#endif

#ifdef SOLARIS
        if ((kc = kstat_open()) == NULL) {
                sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
                return NULL;
        }

        interfaces=0;

        for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
                if (!strcmp(ksp->ks_class, "net")) {
                        kstat_read(kc, ksp, NULL);

#ifdef SOL7
#define LRX "rbytes"
#define LTX "obytes"
#define LIPACKETS "ipackets"
#define LOPACKETS "opackets"
#define VALTYPE value.ui32
#else
#define LRX "rbytes64"
#define LTX "obytes64"
#define LIPACKETS "ipackets64"
#define LOPACKETS "opackets64"
#define VALTYPE value.ui64
#endif

                        /* Read rx */
                        if((knp=kstat_data_lookup(ksp, LRX))==NULL){
                                /* This is a network interface, but it doesn't
                                 * have the rbytes/obytes values; for instance,
                                 * the loopback devices have this behaviour
                                 * (although they do track packets in/out). */
                                /* FIXME: Show packet counts when byte counts
                                 * not available. */
                                continue;
                        }

                        /* Create new network_stats */
                        if (VECTOR_RESIZE(network_stats, interfaces + 1) < 0) {
                                return NULL;
                        }
                        network_stat_ptr=network_stats+interfaces;

                        /* Finish reading rx */
                        network_stat_ptr->rx=knp->VALTYPE;

                        /* Read tx */
                        if((knp=kstat_data_lookup(ksp, LTX))==NULL){
                                continue;
                        }
                        network_stat_ptr->tx=knp->VALTYPE;

                        /* Read ipackets */
                        if((knp=kstat_data_lookup(ksp, LIPACKETS))==NULL){
                                continue;
                        }
                        network_stat_ptr->ipackets=knp->VALTYPE;

                        /* Read opackets */
                        if((knp=kstat_data_lookup(ksp, LOPACKETS))==NULL){
                                continue;
                        }
                        network_stat_ptr->opackets=knp->VALTYPE;

                        /* Read ierrors */
                        if((knp=kstat_data_lookup(ksp, "ierrors"))==NULL){
                                continue;
                        }
                        network_stat_ptr->ierrors=knp->value.ui32;

                        /* Read oerrors */
                        if((knp=kstat_data_lookup(ksp, "oerrors"))==NULL){
                                continue;
                        }
                        network_stat_ptr->oerrors=knp->value.ui32;

                        /* Read collisions */
                        if((knp=kstat_data_lookup(ksp, "collisions"))==NULL){
                                continue;
                        }
                        network_stat_ptr->collisions=knp->value.ui32;

                        /* Read interface name */
                        if (sg_update_string(&network_stat_ptr->interface_name,
                                             ksp->ks_name) < 0) {
                                return NULL;
                        }

                        /* Store systime */
                        network_stat_ptr->systime=time(NULL);

                        interfaces++;
                }
        }
                
        kstat_close(kc);        
#endif
#ifdef LINUX
        f=fopen("/proc/net/dev", "r");
        if(f==NULL){
                sg_set_error(SG_ERROR_OPEN, "/proc/net/dev");
                return NULL;
        }
        /* read the 2 lines.. Its the title, so we dont care :) */
        fgets(line, sizeof(line), f);
        fgets(line, sizeof(line), f);


        if((regcomp(&regex, "^ *([^:]+): *([0-9]+) +([0-9]+) +([0-9]+) +[0-9]+ +[0-9]+ +[0-9]+ +[0-9]+ +[0-9]+ +([0-9]+) +([0-9]+) +([0-9]+) +[0-9]+ +[0-9]+ +([0-9]+)", REG_EXTENDED))!=0){
                sg_set_error(SG_ERROR_PARSE, NULL);
                return NULL;
        }

        interfaces=0;

        while((fgets(line, sizeof(line), f)) != NULL){
                if((regexec(&regex, line, 9, line_match, 0))!=0){
                        continue;
                }

                if (VECTOR_RESIZE(network_stats, interfaces + 1) < 0) {
                        return NULL;
                }
                network_stat_ptr=network_stats+interfaces;

                if(network_stat_ptr->interface_name!=NULL){
                        free(network_stat_ptr->interface_name);
                }

                network_stat_ptr->interface_name=sg_get_string_match(line, &line_match[1]);
                network_stat_ptr->rx=sg_get_ll_match(line, &line_match[2]);
                network_stat_ptr->tx=sg_get_ll_match(line, &line_match[5]);
                network_stat_ptr->ipackets=sg_get_ll_match(line, &line_match[3]);
                network_stat_ptr->opackets=sg_get_ll_match(line, &line_match[6]);
                network_stat_ptr->ierrors=sg_get_ll_match(line, &line_match[4]);
                network_stat_ptr->oerrors=sg_get_ll_match(line, &line_match[7]);
                network_stat_ptr->collisions=sg_get_ll_match(line, &line_match[8]);
                network_stat_ptr->systime=time(NULL);

                interfaces++;
        }
        fclose(f);
        regfree(&regex);

#endif

#ifdef CYGWIN
        sg_set_error(SG_ERROR_UNSUPPORTED, "Cygwin");
        return NULL;
#endif

        *entries=interfaces;

        return network_stats;   
}

static long long transfer_diff(long long new, long long old){
#if defined(SOL7) || defined(LINUX) || defined(FREEBSD) || defined(DFBSD) || defined(OPENBSD)
        /* 32-bit quantities, so we must explicitly deal with wraparound. */
#define MAXVAL 0x100000000LL
        if (new >= old) {
                return new - old;
        } else {
                return MAXVAL + new - old;
        }
#else
        /* 64-bit quantities, so plain subtraction works. */
        return new - old;
#endif
}

sg_network_io_stats *sg_get_network_io_stats_diff(int *entries) {
        VECTOR_DECLARE_STATIC(diff, sg_network_io_stats, 1,
                              network_stat_init, network_stat_destroy);
        sg_network_io_stats *src = NULL, *dest;
        int i, j, diff_count, new_count;

        if (network_stats == NULL) {
                /* No previous stats, so we can't calculate a difference. */
                return sg_get_network_io_stats(entries);
        }

        /* Resize the results array to match the previous stats. */
        diff_count = VECTOR_SIZE(network_stats);
        if (VECTOR_RESIZE(diff, diff_count) < 0) {
                return NULL;
        }

        /* Copy the previous stats into the result. */
        for (i = 0; i < diff_count; i++) {
                src = &network_stats[i];
                dest = &diff[i];

                if (sg_update_string(&dest->interface_name,
                                     src->interface_name) < 0) {
                        return NULL;
                }
                dest->rx = src->rx;
                dest->tx = src->tx;
                dest->ipackets = src->ipackets;
                dest->opackets = src->opackets;
                dest->ierrors = src->ierrors;
                dest->oerrors = src->oerrors;
                dest->collisions = src->collisions;
                dest->systime = src->systime;
        }

        /* Get a new set of stats. */
        if (sg_get_network_io_stats(&new_count) == NULL) {
                return NULL;
        }

        /* For each previous stat... */
        for (i = 0; i < diff_count; i++) {
                dest = &diff[i];

                /* ... find the corresponding new stat ... */
                for (j = 0; j < new_count; j++) {
                        /* Try the new stat in the same position first,
                           since that's most likely to be it. */
                        src = &network_stats[(i + j) % new_count];
                        if (strcmp(src->interface_name, dest->interface_name) == 0) {
                                break;
                        }
                }
                if (j == new_count) {
                        /* No match found. */
                        continue;
                }

                /* ... and subtract the previous stat from it to get the
                   difference. */
                dest->rx = transfer_diff(src->rx, dest->rx);
                dest->tx = transfer_diff(src->tx, dest->tx);
                dest->ipackets = transfer_diff(src->ipackets, dest->ipackets);
                dest->opackets = transfer_diff(src->opackets, dest->opackets);
                dest->ierrors = transfer_diff(src->ierrors, dest->ierrors);
                dest->oerrors = transfer_diff(src->oerrors, dest->oerrors);
                dest->collisions = transfer_diff(src->collisions, dest->collisions);
                dest->systime = src->systime - dest->systime;
        }

        *entries = diff_count;
        return diff;
}

int sg_network_io_compare_name(const void *va, const void *vb) {
        const sg_network_io_stats *a = (const sg_network_io_stats *)va;
        const sg_network_io_stats *b = (const sg_network_io_stats *)vb;

        return strcmp(a->interface_name, b->interface_name);
}

/* NETWORK INTERFACE STATS */

static void network_iface_stat_init(sg_network_iface_stats *s) {
        s->interface_name = NULL;
        s->speed = 0;
        s->dup = SG_IFACE_DUPLEX_UNKNOWN;
}

static void network_iface_stat_destroy(sg_network_iface_stats *s) {
        free(s->interface_name);
}

sg_network_iface_stats *sg_get_network_iface_stats(int *entries){
        VECTOR_DECLARE_STATIC(network_iface_stats, sg_network_iface_stats, 5,
                              network_iface_stat_init, network_iface_stat_destroy);
        sg_network_iface_stats *network_iface_stat_ptr;
        int ifaces = 0;

#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *knp;
        int sock;
#endif
#ifdef ALLBSD
        struct ifaddrs *net, *net_ptr;
        struct ifmediareq ifmed;
        struct ifreq ifr;
        int sock;
        int x;
#endif
#ifdef LINUX
        FILE *f;
        /* Horrible big enough, but it should be easily big enough */
        char line[8096];
        int sock;
#endif

#ifdef ALLBSD
        if(getifaddrs(&net) != 0){
                sg_set_error(SG_ERROR_GETIFADDRS, NULL);
                return NULL;
        }

        if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == 0) return NULL;

        for(net_ptr=net; net_ptr!=NULL; net_ptr=net_ptr->ifa_next){
                if(net_ptr->ifa_addr->sa_family != AF_LINK) continue;

                if (VECTOR_RESIZE(network_iface_stats, ifaces + 1) < 0) {
                        return NULL;
                }
                network_iface_stat_ptr = network_iface_stats + ifaces;

                memset(&ifr, 0, sizeof(ifr));
                strncpy(ifr.ifr_name, net_ptr->ifa_name, sizeof(ifr.ifr_name));

                if (ioctl(sock, SIOCGIFFLAGS, &ifr) < 0){
                        continue;
                }       
                if((ifr.ifr_flags & IFF_UP) != 0){
                        network_iface_stat_ptr->up = 1;
                }else{
                        network_iface_stat_ptr->up = 0;
                }

                if (sg_update_string(&network_iface_stat_ptr->interface_name,
                                     net_ptr->ifa_name) < 0) {
                        return NULL;
                }

                network_iface_stat_ptr->speed = 0;
                network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_UNKNOWN;
                ifaces++;

                memset(&ifmed, 0, sizeof(struct ifmediareq));
                sg_strlcpy(ifmed.ifm_name, net_ptr->ifa_name, sizeof(ifmed.ifm_name));
                if(ioctl(sock, SIOCGIFMEDIA, (caddr_t)&ifmed) == -1){
                        /* Not all interfaces support the media ioctls. */
                        continue;
                }

                /* We may need to change this if we start doing wireless devices too */
                if( (ifmed.ifm_active | IFM_ETHER) != ifmed.ifm_active ){
                        /* Not a ETHER device */
                        continue;
                }

                /* Only intrested in the first 4 bits)  - Assuming only ETHER devices */
                x = ifmed.ifm_active & 0x0f;    
                switch(x){
                        /* 10 Mbit connections. Speedy :) */
                        case(IFM_10_T):
                        case(IFM_10_2):
                        case(IFM_10_5):
                        case(IFM_10_STP):
                        case(IFM_10_FL):
                                network_iface_stat_ptr->speed = 10;
                                break;
                        /* 100 Mbit conneections */
                        case(IFM_100_TX):
                        case(IFM_100_FX):
                        case(IFM_100_T4):
                        case(IFM_100_VG):
                        case(IFM_100_T2):
                                network_iface_stat_ptr->speed = 100;
                                break;
                        /* 1000 Mbit connections */
                        case(IFM_1000_SX):
                        case(IFM_1000_LX):
                        case(IFM_1000_CX):
#if defined(IFM_1000_TX) && !defined(OPENBSD)
                        case(IFM_1000_TX): /* FreeBSD 4 and others (but NOT OpenBSD)? */
#endif
#ifdef IFM_1000_FX
                        case(IFM_1000_FX): /* FreeBSD 4 */
#endif
#ifdef IFM_1000_T
                        case(IFM_1000_T): /* FreeBSD 5 */
#endif
                                network_iface_stat_ptr->speed = 1000;
                                break;
                        /* We don't know what it is */
                        default:
                                network_iface_stat_ptr->speed = 0;
                                break;
                }

                if( (ifmed.ifm_active | IFM_FDX) == ifmed.ifm_active ){
                        network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_FULL;
                }else if( (ifmed.ifm_active | IFM_HDX) == ifmed.ifm_active ){
                        network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_HALF;
                }else{
                        network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_UNKNOWN;
                }

        }       
        freeifaddrs(net);
        close(sock);
#endif

#ifdef SOLARIS
        if ((kc = kstat_open()) == NULL) {
                sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
                return NULL;
        }

        if ((sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0) {
                sg_set_error(SG_ERROR_SOCKET, NULL);
                return NULL;
        }

        for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
                if (!strcmp(ksp->ks_class, "net")) {
                        struct ifreq ifr;

                        kstat_read(kc, ksp, NULL);

                        strncpy(ifr.ifr_name, ksp->ks_name, sizeof ifr.ifr_name);
                        if (ioctl(sock, SIOCGIFFLAGS, &ifr) < 0) {
                                /* Not a network interface. */
                                continue;
                        }

                        if (VECTOR_RESIZE(network_iface_stats, ifaces + 1) < 0) {
                                return NULL;
                        }
                        network_iface_stat_ptr = network_iface_stats + ifaces;
                        ifaces++;

                        if (sg_update_string(&network_iface_stat_ptr->interface_name,
                                             ksp->ks_name) < 0) {
                                return NULL;
                        }

                        if ((ifr.ifr_flags & IFF_UP) != 0) {
                                network_iface_stat_ptr->up = 1;
                        } else {
                                network_iface_stat_ptr->up = 1;
                        }

                        if ((knp = kstat_data_lookup(ksp, "ifspeed")) != NULL) {
                                network_iface_stat_ptr->speed = knp->value.ui64 / (1000 * 1000);
                        } else {
                                network_iface_stat_ptr->speed = 0;
                        }

                        network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_UNKNOWN;
                        if ((knp = kstat_data_lookup(ksp, "link_duplex")) != NULL) {
                                switch (knp->value.ui32) {
                                case 1:
                                        network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_HALF;
                                        break;
                                case 2:
                                        network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_FULL;
                                        break;
                                }
                        }
                }
        }

        close(sock);
        kstat_close(kc);
#endif  
#ifdef LINUX
        f = fopen("/proc/net/dev", "r");
        if(f == NULL){
                sg_set_error(SG_ERROR_OPEN, "/proc/net/dev");
                return NULL;
        }

        /* Setup stuff so we can do the ioctl to get the info */
        if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0){
                sg_set_error(SG_ERROR_SOCKET, NULL);
                return NULL;
        }

        /* Ignore first 2 lines.. Just headings */
        if((fgets(line, sizeof(line), f)) == NULL) {
                sg_set_error(SG_ERROR_PARSE, NULL);
                return NULL;
        }
        if((fgets(line, sizeof(line), f)) == NULL) {
                sg_set_error(SG_ERROR_PARSE, NULL);
                return NULL;
        }

        while((fgets(line, sizeof(line), f)) != NULL){
                char *name, *ptr;
                struct ifreq ifr;
                struct ethtool_cmd ethcmd;
                int err;

                /* Get the interface name */
                ptr = strchr(line, ':');
                if (ptr == NULL) continue;
                *ptr='\0';
                name = line;
                while(isspace(*(name))){
                        name++;
                }

                memset(&ifr, 0, sizeof ifr);
                strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);

                if (ioctl(sock, SIOCGIFFLAGS, &ifr) < 0) {
                        continue;
                }

                /* We have a good interface to add */
                if (VECTOR_RESIZE(network_iface_stats, ifaces + 1) < 0) {
                        return NULL;
                }
                network_iface_stat_ptr = network_iface_stats + ifaces;
                
                if (sg_update_string(&network_iface_stat_ptr->interface_name,
                                     name) < 0) {
                        return NULL;
                }
                if ((ifr.ifr_flags & IFF_UP) != 0) {
                        network_iface_stat_ptr->up = 1;
                } else {
                        network_iface_stat_ptr->up = 0;
                }

                memset(&ethcmd, 0, sizeof ethcmd);
                ethcmd.cmd = ETHTOOL_GSET;
                ifr.ifr_data = (caddr_t) &ethcmd;

                err = ioctl(sock, SIOCETHTOOL, &ifr);
                if (err == 0) {
                        network_iface_stat_ptr->speed = ethcmd.speed;

                        switch (ethcmd.duplex) {
                        case 0x00:
                                network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_FULL;
                                break;
                        case 0x01:
                                network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_HALF;
                                break;
                        default:
                                network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_UNKNOWN;
                        }
                } else {
                        /* Not all interfaces support the ethtool ioctl. */
                        network_iface_stat_ptr->speed = 0;
                        network_iface_stat_ptr->dup = SG_IFACE_DUPLEX_UNKNOWN;
                }

                ifaces++;
        }
        close(sock);
        fclose(f);
#endif
        *entries = ifaces;
        return network_iface_stats; 
}

int sg_network_iface_compare_name(const void *va, const void *vb) {
        const sg_network_iface_stats *a = (const sg_network_iface_stats *)va;
        const sg_network_iface_stats *b = (const sg_network_iface_stats *)vb;

        return strcmp(a->interface_name, b->interface_name);
}

Revision:	1.68
Committed:	Thu Apr 8 13:44:44 2004 UTC (20 years, 1 month ago) by ats
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_10
Changes since 1.67:	+15 -1 lines
Log Message:	Add comparison functions for names where that's likely to be useful. Make the network_iface_stats example show how to use bsearch to find an interface by name.