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 1.81 2010/06/09 14:44:28 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>
#include <linux/version.h>
#include <asm/types.h>
/* These aren't defined by asm/types.h unless the kernel is being
   compiled, but some versions of ethtool.h need them. */
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
#ifdef AIX
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <errno.h>
#include <strings.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <libperfstat.h>
#endif
#ifdef HPUX
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <errno.h>
#include <strings.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/un.h>
#include <sys/stropts.h>
#include <sys/dlpi.h>
#include <sys/dlpi_ext.h>
#include <sys/mib.h>
#define HP_UX11 /* Currently no HP-UX below 11 is supported, fix here if this changes */
#endif
#ifdef WIN32
#include <windows.h>
#include <Iphlpapi.h>
#include "win32.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);

#ifdef WIN32
static PMIB_IFTABLE win32_get_devices()
{
        PMIB_IFTABLE if_table;
        PMIB_IFTABLE tmp;
        unsigned long dwSize = 0;

        // Allocate memory for pointers
        if_table = sg_malloc(sizeof(MIB_IFTABLE));
        if(if_table == NULL) {
                return NULL;
        }

        // Get necessary size for the buffer
        if(GetIfTable(if_table, &dwSize, 0) == ERROR_INSUFFICIENT_BUFFER) {
                tmp = sg_realloc(if_table, dwSize);
                if(tmp == NULL) {
                        free(if_table);
                        return NULL;
                }
                if_table = tmp;
        }

        // Get the data
        if(GetIfTable(if_table, &dwSize, 0) != NO_ERROR) {
                free(if_table);
                return NULL;
        }
        return if_table;
}
#endif /* WIN32 */

sg_network_io_stats *sg_get_network_io_stats(int *entries){
        int interfaces;
#ifndef AIX
        sg_network_io_stats *network_stat_ptr;
#endif
#ifdef HPUX
/* 
 * talk to Data Link Provider Interface aka /dev/dlpi
 * see: http://docs.hp.com/hpux/onlinedocs/B2355-90139/B2355-90139.html
 */
#define BUF_SIZE 40960

        u_long *ctrl_area = malloc(BUF_SIZE);
        u_long *data_area = malloc(BUF_SIZE);
        u_long *ppa_area = malloc(BUF_SIZE);
        struct strbuf ctrl_buf = {BUF_SIZE, 0, (char*) ctrl_area};
        struct strbuf data_buf = {BUF_SIZE, 0, (char*) data_area};

        dl_hp_ppa_info_t *ppa_info;
        dl_hp_ppa_req_t *ppa_req;
        dl_hp_ppa_ack_t *ppa_ack;
        char name_buf[24];
        int fd = -1, ppa_count, count, flags;
#endif

#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 WIN32
        PMIB_IFTABLE if_table;
        MIB_IFROW if_row;
        int i, no, j;

        /* used for duplicate interface names. 5 for space, hash, up to two
         * numbers and terminating slash */
        char buf[5];
#endif
#ifdef AIX
        int i;
        perfstat_netinterface_t *statp;
        perfstat_id_t first;
#endif

#ifdef HPUX
        interfaces=0;

        if ((fd = open("/dev/dlpi", O_RDWR)) < 0) {
                sg_set_error_with_errno(SG_ERROR_OPEN, "/dev/dlpi");
                return NULL;
        }

        ppa_req = (dl_hp_ppa_req_t *) ctrl_area;
        ppa_ack = (dl_hp_ppa_ack_t *) ctrl_area;

        ppa_req->dl_primitive = DL_HP_PPA_REQ;

        ctrl_buf.len = sizeof(dl_hp_ppa_req_t);
        if(putmsg(fd, &ctrl_buf, 0, 0) < 0) {
                sg_set_error_with_errno(SG_ERROR_PUTMSG, "DL_HP_PPA_REQ");
                return NULL;
        }

        flags = 0;
        ctrl_area[0] = 0;

        if (getmsg(fd, &ctrl_buf, &data_buf, &flags) < 0) {
                sg_set_error_with_errno(SG_ERROR_GETMSG, "DL_HP_PPA_REQ");
                return NULL;
        }

        if (ppa_ack->dl_length == 0) {
                sg_set_error_with_errno(SG_ERROR_PARSE, "DL_HP_PPA_REQ");
                return NULL;
        }

        // save all the PPA information
        memcpy ((u_char*) ppa_area, (u_char*) ctrl_area + ppa_ack->dl_offset, ppa_ack->dl_length);
        ppa_count = ppa_ack->dl_count;

        for (count = 0, ppa_info = (dl_hp_ppa_info_t*) ppa_area;
             count < ppa_count;
             count++) {
                dl_get_statistics_req_t *get_statistics_req = (dl_get_statistics_req_t*) ctrl_area;
                dl_get_statistics_ack_t *get_statistics_ack = (dl_get_statistics_ack_t*) ctrl_area;

                dl_attach_req_t *attach_req;
                dl_detach_req_t *detach_req;
                mib_ifEntry *mib_ptr;
#ifdef HP_UX11
                mib_Dot3StatsEntry *mib_Dot3_ptr;
#endif

                attach_req = (dl_attach_req_t*) ctrl_area;
                attach_req->dl_primitive = DL_ATTACH_REQ;
                attach_req->dl_ppa = ppa_info[count].dl_ppa;
                ctrl_buf.len = sizeof(dl_attach_req_t);
                if (putmsg(fd, &ctrl_buf, 0, 0) < 0) {
                        sg_set_error_with_errno(SG_ERROR_PUTMSG, "DL_ATTACH_REQ");
                        return NULL;
                }

                ctrl_area[0] = 0;
                if (getmsg(fd, &ctrl_buf, &data_buf, &flags) < 0) {
                        sg_set_error_with_errno(SG_ERROR_GETMSG, "DL_ATTACH_REQ");
                        return NULL;
                }

                get_statistics_req->dl_primitive = DL_GET_STATISTICS_REQ;
                ctrl_buf.len = sizeof(dl_get_statistics_req_t);

                if (putmsg(fd, &ctrl_buf, NULL, 0) < 0) {
                        sg_set_error_with_errno(SG_ERROR_PUTMSG, "DL_GET_STATISTICS_REQ");
                        return NULL;
                }

                flags = 0;
                ctrl_area[0] = 0;

                if (getmsg(fd, &ctrl_buf, NULL, &flags) < 0) {
                        sg_set_error_with_errno(SG_ERROR_GETMSG, "DL_GET_STATISTICS_REQ");
                        return NULL;
                }
                if (get_statistics_ack->dl_primitive != DL_GET_STATISTICS_ACK) {
                        sg_set_error_with_errno(SG_ERROR_PARSE, "DL_GET_STATISTICS_ACK");
                        return NULL;
                }

                mib_ptr = (mib_ifEntry*) ((u_char*) ctrl_area + get_statistics_ack->dl_stat_offset);

                if (0 == (mib_ptr->ifOper & 1)) {
                        continue;
                }

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

                snprintf( name_buf, sizeof(name_buf), "lan%d", ppa_info[count].dl_ppa );

                if (sg_update_string(&network_stat_ptr->interface_name, name_buf ) < 0 ) {
                        return NULL;
                }
                network_stat_ptr->rx = mib_ptr->ifInOctets;
                network_stat_ptr->tx = mib_ptr->ifOutOctets;
                network_stat_ptr->ipackets = mib_ptr->ifInUcastPkts + mib_ptr->ifInNUcastPkts;
                network_stat_ptr->opackets = mib_ptr->ifOutUcastPkts + mib_ptr->ifOutNUcastPkts;
                network_stat_ptr->ierrors = mib_ptr->ifInErrors;
                network_stat_ptr->oerrors = mib_ptr->ifOutErrors;
#ifdef HP_UX11
                mib_Dot3_ptr = (mib_Dot3StatsEntry *) (void *) ((int) mib_ptr + sizeof (mib_ifEntry));
                network_stat_ptr->collisions = mib_Dot3_ptr->dot3StatsSingleCollisionFrames
                                             + mib_Dot3_ptr->dot3StatsMultipleCollisionFrames;
#else
                network_stat_ptr->collisions = 0; /* currently unknown */
#endif
                network_stat_ptr->systime = time(NULL);
                interfaces++;

                detach_req = (dl_detach_req_t*) ctrl_area;
                detach_req->dl_primitive = DL_DETACH_REQ;
                ctrl_buf.len = sizeof(dl_detach_req_t);
                if (putmsg(fd, &ctrl_buf, 0, 0) < 0) {
                        sg_set_error_with_errno(SG_ERROR_PUTMSG, "DL_DETACH_REQ");
                        return NULL;
                }

                ctrl_area[0] = 0;
                flags = 0;
                if (getmsg(fd, &ctrl_buf, &data_buf, &flags) < 0) {
                        sg_set_error_with_errno(SG_ERROR_GETMSG, "DL_DETACH_REQ");
                        return NULL;
                }
        }

        close(fd);

        free(ctrl_area);
        free(data_area);
        free(ppa_area);

#endif

#ifdef ALLBSD
        if (getifaddrs(&net) != 0){
                sg_set_error_with_errno(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 AIX
        /* check how many perfstat_netinterface_t structures are available */
        interfaces = perfstat_netinterface(NULL, NULL, sizeof(perfstat_netinterface_t), 0);

        /* allocate enough memory for all the structures */
        statp = calloc(interfaces, sizeof(perfstat_netinterface_t));

        /* set name to first interface */
        strcpy(first.name, FIRST_NETINTERFACE);

        /* ask to get all the structures available in one call */
        /* return code is number of structures returned */
        interfaces = perfstat_netinterface(&first, statp, sizeof(perfstat_netinterface_t), interfaces);
        if (-1 == interfaces) {
                sg_set_error(SG_ERROR_SYSCTLBYNAME, "perfstat_netinterface");
                free(statp);
                return NULL;
        }

        if (VECTOR_RESIZE(network_stats, interfaces) < 0) {
                sg_set_error(SG_ERROR_MALLOC, NULL);
                free(statp);
                return NULL;
        }

        /* print statistics for each of the interfaces */
        for (i = 0; i < interfaces; i++) {
                if (sg_update_string(&network_stats[i].interface_name, statp[i].name) < 0) {
                        free(statp);
                        return NULL;
                }
                network_stats[i].tx = statp[i].obytes;
                network_stats[i].rx = statp[i].ibytes;
                network_stats[i].opackets = statp[i].opackets;
                network_stats[i].ipackets = statp[i].ipackets;
                network_stats[i].oerrors = statp[i].oerrors;
                network_stats[i].ierrors = statp[i].ierrors;
                network_stats[i].collisions = statp[i].collisions;
                network_stats[i].systime = time(NULL);
        }

        free(statp);
#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") == 0) {
                        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) {
                                kstat_close(kc);
                                return NULL;
                        }
                        network_stat_ptr=network_stats+interfaces;

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

                        /* 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;


                        /* 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_with_errno(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

#ifdef WIN32
        interfaces = 0;

        if((if_table = win32_get_devices()) == NULL) {
                sg_set_error(SG_ERROR_DEVICES, "network");
                return NULL;
        }

        if(VECTOR_RESIZE(network_stats, if_table->dwNumEntries) < 0) {
                free(if_table);
                return NULL;
        }

        for (i=0; i<if_table->dwNumEntries; i++) {
                network_stat_ptr=network_stats+i;
                if_row = if_table->table[i];

                if(sg_update_string(&network_stat_ptr->interface_name,
                                        if_row.bDescr) < 0) {
                        free(if_table);
                        return NULL;
                }
                network_stat_ptr->tx = if_row.dwOutOctets;
                network_stat_ptr->rx = if_row.dwInOctets;
                network_stat_ptr->ipackets = if_row.dwInUcastPkts + if_row.dwInNUcastPkts;
                network_stat_ptr->opackets = if_row.dwOutUcastPkts + if_row.dwOutNUcastPkts;
                network_stat_ptr->ierrors = if_row.dwInErrors;
                network_stat_ptr->oerrors = if_row.dwOutErrors;
                network_stat_ptr->collisions = 0; /* can't do that */
                network_stat_ptr->systime = time(NULL);

                interfaces++;
        }
        free(if_table);

        /* Please say there's a nicer way to do this...  If windows has two (or
         * more) identical network cards, GetIfTable returns them with the same
         * name, not like in Device Manager where the other has a #2 etc after
         * it. So, add the #number here. Should we be doing this? Or should the
         * end programs be dealing with duplicate names? Currently breaks
         * watch.pl in rrdgraphing. But Unix does not have the issue of
         * duplicate net device names.
         */
        for (i=0; i<interfaces; i++) {
                no = 2;
                for(j=i+1; j<interfaces; j++) {
                        network_stat_ptr=network_stats+j;
                        if(strcmp(network_stats[i].interface_name, 
                                        network_stat_ptr->interface_name) == 0) {
                                if(snprintf(buf, sizeof(buf), " #%d", no) < 0) {
                                        break;
                                }
                                if(sg_concat_string(&network_stat_ptr->interface_name, buf) != 0) {
                                        return NULL;
                                }

                                no++;
                        }
                }
        }
#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) || defined(WIN32)
        /* 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->duplex = 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 ifmediareq ifmed;
        struct ifaddrs *net, *net_ptr;
        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 WIN32
        PMIB_IFTABLE if_table;
        MIB_IFROW if_row;
        int i,j,no;
        char buf[5];
#endif
#ifdef AIX
        int fd, n;
        size_t pagesize;
        struct ifreq *ifr, *lifr, iff;
        struct ifconf ifc;
#endif
#ifdef HPUX
        int fd;
        struct ifreq *ifr, *lifr, iff;
        struct ifconf ifc;
#endif

#ifdef ALLBSD
        if(getifaddrs(&net) != 0){
                sg_set_error_with_errno(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->duplex = 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;
                }

                /* Assuming only ETHER devices */
                x = IFM_SUBTYPE(ifmed.ifm_active);
                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 connections */
                        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->duplex = SG_IFACE_DUPLEX_FULL;
                }else if( (ifmed.ifm_active | IFM_HDX) == ifmed.ifm_active ){
                        network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_HALF;
                }else{
                        network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_UNKNOWN;
                }
        }       
        freeifaddrs(net);
        close(sock);
#endif

#ifdef AIX
/*
 * Fix up variable length of struct ifr
 */
#ifndef _SIZEOF_ADDR_IFREQ
#define _SIZEOF_ADDR_IFREQ(ifr) \
        (((ifr).ifr_addr.sa_len > sizeof(struct sockaddr)) \
        ? sizeof(struct ifreq) - sizeof(struct sockaddr) + (ifr).ifr_addr.sa_len \
        : sizeof(struct ifreq))
#endif

        if ((pagesize = sysconf(_SC_PAGESIZE)) == ((size_t)-1)) {
                sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PAGESIZE");
                return NULL;
        }

        if ((fd = socket (PF_INET, SOCK_DGRAM, 0)) == -1) {
                return NULL;
        }

        n = 2;
        ifr = (struct ifreq *)malloc( n*pagesize );
        if( NULL == ifr ) {
                sg_set_error_with_errno(SG_ERROR_MALLOC, NULL);
                close (fd);
                return NULL;
        }
        bzero(&ifc, sizeof(ifc));
        ifc.ifc_req = ifr;
        ifc.ifc_len = n * pagesize;
        while( ( ioctl( fd, SIOCGIFCONF, &ifc ) == -1 ) ||
               ( ((size_t)ifc.ifc_len) >= ( (n-1) * pagesize)) )
        {
                n *= 2;
                ifr = (struct ifreq *)realloc( ifr, n*pagesize );
                if( NULL == ifr ) {
                        free( ifc.ifc_req );
                        close (fd);
                        sg_set_error_with_errno(SG_ERROR_MALLOC, NULL);
                        return NULL;
                }
                ifc.ifc_req = ifr;
                ifc.ifc_len = n * pagesize;
        }

        lifr = (struct ifreq *)&ifc.ifc_buf[ifc.ifc_len];
        for ( ifr = ifc.ifc_req;
              ifr < lifr;
              ifr = (struct ifreq *)&(((char *)ifr)[_SIZEOF_ADDR_IFREQ(*ifr)]) )
        {
                struct sockaddr *sa = &ifr->ifr_addr;

                if(sa->sa_family != AF_LINK)
                        continue;

                if (VECTOR_RESIZE(network_iface_stats, ifaces + 1) < 0) {
                        free( ifc.ifc_req );
                        close (fd);
                        return NULL;
                }
                network_iface_stat_ptr = network_iface_stats + ifaces;

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

                if (ioctl(fd, SIOCGIFFLAGS, &iff) < 0) {
                        continue;
                }

                if ((iff.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,
                                     ifr->ifr_name) < 0) {
                        close (fd);
                        free( ifc.ifc_req );
                        return NULL;
                }

                network_iface_stat_ptr->speed = 0;
                network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_UNKNOWN;
                ifaces++;
        }

        close (fd);
        free( ifc.ifc_req );
#endif

#ifdef HPUX
/*
 * Fix up variable length of struct ifr
 */
#ifndef _SA_LEN
#define _SA_LEN(sa) \
   ((sa).sa_family == AF_UNIX ? sizeof(struct sockaddr_un) : \
   (sa).sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : \
   sizeof(struct sockaddr))
#endif

#ifndef _SIZEOF_ADDR_IFREQ
#define _SIZEOF_ADDR_IFREQ(ifr) \
        ((_SA_LEN((ifr).ifr_addr) > sizeof(struct sockaddr)) \
        ? sizeof(struct ifreq) - sizeof(struct sockaddr) + _SA_LEN((ifr).ifr_addr) \
        : sizeof(struct ifreq))
#endif
        if ((fd = socket (PF_INET, SOCK_DGRAM, 0)) == -1) {
                return NULL;
        }

        bzero(&ifc, sizeof(ifc));
        if (ioctl (fd, SIOCGIFNUM, &ifc) != -1) {
                ifr = calloc(sizeof (*ifr), ifc.ifc_len);
                if( NULL == ifr ) {
                        close (fd);
                        sg_set_error_with_errno(SG_ERROR_MALLOC, NULL);
                        return NULL;
                }
                ifc.ifc_req = ifr;
                ifc.ifc_len *= sizeof (*ifr);
                if (ioctl (fd, SIOCGIFCONF, &ifc) == -1) {
                        free (ifr);
                        close (fd);
                        sg_set_error_with_errno(SG_ERROR_GETIFADDRS, NULL);
                        return NULL;
                }
        } else {
                close (fd);
                sg_set_error_with_errno(SG_ERROR_GETIFADDRS, NULL);
                return NULL;
        }

        lifr = (struct ifreq *)&ifc.ifc_buf[ifc.ifc_len];
        for ( ifr = ifc.ifc_req;
              ifr < lifr;
              ifr = (struct ifreq *)(((char *)ifr) + _SIZEOF_ADDR_IFREQ(*ifr)) )
        {
                if (VECTOR_RESIZE(network_iface_stats, ifaces + 1) < 0) {
                        free( ifc.ifc_req );
                        close (fd);
                        return NULL;
                }
                network_iface_stat_ptr = network_iface_stats + ifaces;

                bzero(&iff, sizeof(iff));
                strncpy(iff.ifr_name, ifr->ifr_name, sizeof(iff.ifr_name));

                if (ioctl(fd, SIOCGIFFLAGS, &iff) < 0) {
                        continue;
                }

                if ((iff.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,
                                     ifr->ifr_name) < 0) {
                        close (fd);
                        free( ifc.ifc_req );
                        return NULL;
                }

                /**
                 * for physical devices we now could ask /dev/dlpi for speed and type,
                 * but for monitoring we don't care
                 */
                network_iface_stat_ptr->speed = 0;
                network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_UNKNOWN;
                ifaces++;
        }

        close (fd);
        free( ifc.ifc_req );
#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_with_errno(SG_ERROR_SOCKET, NULL);
                kstat_close(kc);
                return NULL;
        }

        for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
                if (strcmp(ksp->ks_class, "net") == 0) {
                        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) {
                                kstat_close(kc);
                                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) {
                                kstat_close(kc);
                                return NULL;
                        }

                        if ((ifr.ifr_flags & IFF_UP) != 0) {
                                if ((knp = kstat_data_lookup(ksp, "link_up")) != NULL) {
                                        /* take in to account if link
                                         * is up as well as interface */
                                        if (knp->value.ui32 != 0u) {
                                                network_iface_stat_ptr->up = 1;
                                        } else {
                                                network_iface_stat_ptr->up = 0;
                                        }
                                }
                                else {
                                        /* maintain compatibility */
                                        network_iface_stat_ptr->up = 1;
                                }
                        } else {
                                network_iface_stat_ptr->up = 0;
                        }

                        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->duplex = SG_IFACE_DUPLEX_UNKNOWN;
                        if ((knp = kstat_data_lookup(ksp, "link_duplex")) != NULL) {
                                switch (knp->value.ui32) {
                                case 1:
                                        network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_HALF;
                                        break;
                                case 2:
                                        network_iface_stat_ptr->duplex = 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_with_errno(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_with_errno(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 DUPLEX_FULL:
                                network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_FULL;
                                break;
                        case DUPLEX_HALF:
                                network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_HALF;
                                break;
                        default:
                                network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_UNKNOWN;
                        }
                } else {
                        /* Not all interfaces support the ethtool ioctl. */
                        network_iface_stat_ptr->speed = 0;
                        network_iface_stat_ptr->duplex = SG_IFACE_DUPLEX_UNKNOWN;
                }

                ifaces++;
        }
        close(sock);
        fclose(f);
#endif
#ifdef CYGWIN
        sg_set_error(SG_ERROR_UNSUPPORTED, "Cygwin");
        return NULL;
#endif
#ifdef WIN32
        ifaces = 0;

        if((if_table = win32_get_devices()) == NULL) {
                sg_set_error(SG_ERROR_DEVICES, "network interfaces");
                return NULL;
        }

        if(VECTOR_RESIZE(network_iface_stats, if_table->dwNumEntries) < 0) {
                free(if_table);
                return NULL;
        }

        for(i=0; i<if_table->dwNumEntries; i++) {
                network_iface_stat_ptr=network_iface_stats+i;
                if_row = if_table->table[i];

                if(sg_update_string(&network_iface_stat_ptr->interface_name,
                                        if_row.bDescr) < 0) {
                        free(if_table);
                        return NULL;
                }
                network_iface_stat_ptr->speed = if_row.dwSpeed /1000000;

                if((if_row.dwOperStatus == MIB_IF_OPER_STATUS_CONNECTED ||
                                if_row.dwOperStatus == 
                                        MIB_IF_OPER_STATUS_OPERATIONAL) &&
                                if_row.dwAdminStatus == 1) {
                        network_iface_stat_ptr->up = 1;
                } else {
                        network_iface_stat_ptr->up = 0;
                }

                ifaces++;
        }
        free(if_table);

        /* again with the renumbering */
        for (i=0; i<ifaces; i++) {
                no = 2;
                for(j=i+1; j<ifaces; j++) {
                        network_iface_stat_ptr=network_iface_stats+j;
                        if(strcmp(network_iface_stats[i].interface_name, 
                                        network_iface_stat_ptr->interface_name) == 0) {
                                if(snprintf(buf, sizeof(buf), " #%d", no) < 0) {
                                        break;
                                }
                                if(sg_concat_string(&network_iface_stat_ptr->interface_name, buf) != 0) {
                                        return NULL;
                                }

                                no++;
                        }
                }
        }
#endif

#ifdef SG_ENABLE_DEPRECATED
        network_iface_stat_ptr->dup = network_iface_stat_ptr->duplex;
#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:	1.82
Committed:	Sun Oct 3 18:35:57 2010 UTC (13 years, 7 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.81:	+426 -13 lines
Log Message:	Add support for AIX 5.x - 9.x. Many thanks to Jens Rehsack <rehsack@googlemail.com> for providing the patch for this work. Thanks!