1f651d17c1
the infamous strncpy does not NULL terminate the destination when the buffer is truncated do it ourself ! fix CID 1362576
86 строки
1.9 KiB
C
86 строки
1.9 KiB
C
/*
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* Copyright (c) 2016 Karol Mroz. All rights reserved.
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* Copyright (c) 2016 Research Organization for Information Science
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* and Technology (RIST). All rights reserved.
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* Copyright (c) 2016 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "opal_config.h"
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#include <string.h>
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#include <limits.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_NET_IF_H
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#include <net/if.h>
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#endif
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#ifdef HAVE_LINUX_ETHTOOL_H
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#include <linux/ethtool.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_LINUX_SOCKIOS_H
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#include <linux/sockios.h>
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#endif
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#include "opal/util/ethtool.h"
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#include "opal/util/if.h"
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/*
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* Obtain an appropriate bandwidth for the interface if_name. On Linux, we
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* get this via an ioctl(). Elsewhere or in the error case, we return the
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* speed as 0.
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*/
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unsigned int
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opal_ethtool_get_speed (const char *if_name)
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{
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unsigned int speed = 0;
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#if defined(HAVE_DECL_SIOCETHTOOL) && defined(HAVE_STRUCT_IFREQ) && defined(HAVE_STRUCT_ETHTOOL_CMD)
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int sockfd;
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struct ifreq ifr;
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struct ethtool_cmd edata = {
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.cmd = ETHTOOL_GSET,
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};
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sockfd = socket(PF_INET, SOCK_DGRAM, 0);
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if (sockfd < 0) {
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goto out;
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}
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memset(&ifr, 0, sizeof(struct ifreq));
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strncpy(ifr.ifr_name, if_name, IF_NAMESIZE);
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/* strncpy does not null terminate when the string is truncated */
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ifr.ifr_name[IF_NAMESIZE-1] = '\0';
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ifr.ifr_data = (char *)&edata;
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if (ioctl(sockfd, SIOCETHTOOL, &ifr) < 0) {
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goto out;
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}
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#if HAVE_DECL_ETHTOOL_CMD_SPEED
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speed = ethtool_cmd_speed(&edata);
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#elif defined(HAVE_STRUCT_ETHTOOL_CMD_SPEED_HI)
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speed = (edata.speed_hi << 16) | edata.speed;
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#else
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speed = edata.speed;
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#endif
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if (UINT_MAX == speed) {
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speed = 0;
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}
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out:
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close(sockfd);
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#endif
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return speed;
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}
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