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/*
* Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018 Amazon.com, Inc. or its affiliates. All Rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <errno.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_IFADDRS_H
#include <ifaddrs.h>
#endif
#include "opal/constants.h"
#include "opal/util/if.h"
#include "opal/util/output.h"
#include "opal/mca/if/if.h"
#include "opal/mca/if/base/base.h"
static int if_linux_ipv6_open(void);
/* Discovers Linux IPv6 interfaces */
opal_if_base_component_t mca_if_linux_ipv6_component = {
/* First, the mca_component_t struct containing meta information
about the component itself */
{
OPAL_IF_BASE_VERSION_2_0_0,
/* Component name and version */
"linux_ipv6",
OPAL_MAJOR_VERSION,
OPAL_MINOR_VERSION,
OPAL_RELEASE_VERSION,
/* Component open and close functions */
if_linux_ipv6_open,
NULL
},
{
/* This component is checkpointable */
MCA_BASE_METADATA_PARAM_CHECKPOINT
},
};
/* configure using getifaddrs(3) */
static int if_linux_ipv6_open(void)
{
#if OPAL_ENABLE_IPV6
FILE *f;
if ((f = fopen("/proc/net/if_inet6", "r"))) {
char ifname[IF_NAMESIZE];
unsigned int idx, pfxlen, scope, dadstat;
struct in6_addr a6;
int iter;
uint32_t flag;
unsigned int addrbyte[16];
while (fscanf(f, "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x %x %x %x %x %20s\n",
&addrbyte[0], &addrbyte[1], &addrbyte[2], &addrbyte[3],
&addrbyte[4], &addrbyte[5], &addrbyte[6], &addrbyte[7],
&addrbyte[8], &addrbyte[9], &addrbyte[10], &addrbyte[11],
&addrbyte[12], &addrbyte[13], &addrbyte[14], &addrbyte[15],
&idx, &pfxlen, &scope, &dadstat, ifname) != EOF) {
opal_if_t *intf;
opal_output_verbose(1, opal_if_base_framework.framework_output,
"found interface %2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x scope %x\n",
addrbyte[0], addrbyte[1], addrbyte[2], addrbyte[3],
addrbyte[4], addrbyte[5], addrbyte[6], addrbyte[7],
addrbyte[8], addrbyte[9], addrbyte[10], addrbyte[11],
addrbyte[12], addrbyte[13], addrbyte[14], addrbyte[15], scope);
/* Only interested in global (0x00) scope */
if (scope != 0x00) {
opal_output_verbose(1, opal_if_base_framework.framework_output,
"skipping interface %2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x scope %x\n",
addrbyte[0], addrbyte[1], addrbyte[2], addrbyte[3],
addrbyte[4], addrbyte[5], addrbyte[6], addrbyte[7],
addrbyte[8], addrbyte[9], addrbyte[10], addrbyte[11],
addrbyte[12], addrbyte[13], addrbyte[14], addrbyte[15], scope);
continue;
}
intf = OBJ_NEW(opal_if_t);
if (NULL == intf) {
opal_output(0, "opal_ifinit: unable to allocate %lu bytes\n",
(unsigned long)sizeof(opal_if_t));
fclose(f);
return OPAL_ERR_OUT_OF_RESOURCE;
}
intf->af_family = AF_INET6;
for (iter = 0; iter < 16; iter++) {
a6.s6_addr[iter] = addrbyte[iter];
}
/* now construct the opal_if_t */
strncpy(intf->if_name, ifname, IF_NAMESIZE);
intf->if_index = opal_list_get_size(&opal_if_list)+1;
intf->if_kernel_index = (uint16_t) idx;
((struct sockaddr_in6*) &intf->if_addr)->sin6_addr = a6;
((struct sockaddr_in6*) &intf->if_addr)->sin6_family = AF_INET6;
((struct sockaddr_in6*) &intf->if_addr)->sin6_scope_id = scope;
intf->if_mask = pfxlen;
if (OPAL_SUCCESS == opal_ifindextoflags(opal_ifnametoindex (ifname), &flag)) {
intf->if_flags = flag;
} else {
intf->if_flags = IFF_UP;
}
/* copy new interface information to heap and append
to list */
opal_list_append(&opal_if_list, &(intf->super));
opal_output_verbose(1, opal_if_base_framework.framework_output,
"added interface %2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x:%2x%2x\n",
addrbyte[0], addrbyte[1], addrbyte[2], addrbyte[3],
addrbyte[4], addrbyte[5], addrbyte[6], addrbyte[7],
addrbyte[8], addrbyte[9], addrbyte[10], addrbyte[11],
addrbyte[12], addrbyte[13], addrbyte[14], addrbyte[15]);
} /* of while */
fclose(f);
}
#endif /* OPAL_ENABLE_IPV6 */
return OPAL_SUCCESS;
}
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