e96b5f486f
All interface APIs for accessing the info remain unchanged in opal/util/if.c. This has been tested on Mac, Linux, and NetBSD. Nobody else seemed interested in testing it, so there may be some future problems revealed as people try it on other OSs. This commit was SVN r23743.
144 строки
3.8 KiB
C
144 строки
3.8 KiB
C
/*
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* Copyright (c) 2010 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 <stdlib.h>
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#include <string.h>
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#include "opal/constants.h"
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#include "opal/mca/if/if.h"
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static int if_bsdx_open(void);
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/* Supports specific flavors of BSD:
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* NetBSD
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* FreeBSD
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* OpenBSD
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* DragonFly
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*/
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opal_if_base_component_t mca_if_bsdx_ipv4_component = {
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/* First, the mca_component_t struct containing meta information
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about the component itself */
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{
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OPAL_IF_BASE_VERSION_2_0_0,
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/* Component name and version */
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"bsdx_ipv4",
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OPAL_MAJOR_VERSION,
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OPAL_MINOR_VERSION,
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OPAL_RELEASE_VERSION,
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/* Component open and close functions */
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if_bsdx_open,
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NULL
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},
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{
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/* This component is checkpointable */
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MCA_BASE_METADATA_PARAM_CHECKPOINT
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},
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};
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/* convert a netmask (in network byte order) to CIDR notation */
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static int prefix (uint32_t netmask)
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{
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uint32_t mask = ntohl(netmask);
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int plen = 0;
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if (0 == mask) {
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plen = 32;
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} else {
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while ((mask % 2) == 0) {
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plen += 1;
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mask /= 2;
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}
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}
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return (32 - plen);
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}
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/* configure using getifaddrs(3) */
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static int if_bsdx_open(void)
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{
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struct ifaddrs **ifadd_list;
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struct ifaddrs *cur_ifaddrs;
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struct sockaddr_in* sin_addr;
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/*
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* the manpage claims that getifaddrs() allocates the memory,
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* and freeifaddrs() is later used to release the allocated memory.
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* however, without this malloc the call to getifaddrs() segfaults
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*/
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ifadd_list = (struct ifaddrs **) malloc(sizeof(struct ifaddrs*));
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/* create the linked list of ifaddrs structs */
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if (getifaddrs(ifadd_list) < 0) {
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opal_output(0, "opal_ifinit: getifaddrs() failed with error=%d\n",
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errno);
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return OPAL_ERROR;
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}
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for (cur_ifaddrs = *ifadd_list; NULL != cur_ifaddrs;
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cur_ifaddrs = cur_ifaddrs->ifa_next) {
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opal_if_t *intf;
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struct in_addr a4;
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/* skip non- af_inet interface addresses */
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if (AF_INET != cur_ifaddrs->ifa_addr->sa_family) {
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continue;
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}
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/* skip interface if it is down (IFF_UP not set) */
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if (0 == (cur_ifaddrs->ifa_flags & IFF_UP)) {
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continue;
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}
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/* skip interface if it is a loopback device (IFF_LOOPBACK set) */
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if (!opal_if_retain_loopback && 0 != (cur_ifaddrs->ifa_flags & IFF_LOOPBACK)) {
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continue;
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}
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/* or if it is a point-to-point interface */
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/* TODO: do we really skip p2p? */
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if (0 != (cur_ifaddrs->ifa_flags & IFF_POINTOPOINT)) {
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continue;
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}
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sin_addr = (struct sockaddr_in *) cur_ifaddrs->ifa_addr;
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intf = OBJ_NEW(opal_if_t);
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if (NULL == intf) {
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opal_output(0, "opal_ifinit: unable to allocate %d bytes\n",
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(int) sizeof(opal_if_t));
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return OPAL_ERR_OUT_OF_RESOURCE;
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}
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/* fill values into the opal_if_t */
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memcpy(&a4, &(sin_addr->sin_addr), sizeof(struct in_addr));
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strncpy(intf->if_name, cur_ifaddrs->ifa_name, IF_NAMESIZE);
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intf->if_index = opal_list_get_size(&opal_if_list) + 1;
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((struct sockaddr_in*) &intf->if_addr)->sin_addr = a4;
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((struct sockaddr_in*) &intf->if_addr)->sin_family = AF_INET;
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((struct sockaddr_in*) &intf->if_addr)->sin_len = cur_ifaddrs->ifa_addr->sa_len;
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intf->if_mask = prefix( sin_addr->sin_addr.s_addr);
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intf->if_flags = cur_ifaddrs->ifa_flags;
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intf->if_kernel_index =
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(uint16_t) if_nametoindex(cur_ifaddrs->ifa_name);
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opal_list_append(&opal_if_list, &(intf->super));
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} /* of for loop over ifaddrs list */
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return OPAL_SUCCESS;
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}
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