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/*
* Copyright (c) 2010-2019 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 (c) 2019 Triad National Security, LLC. 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/mca/if/base/base.h"
#include "opal/mca/if/if.h"
#include "opal/runtime/opal.h"
#include "opal/util/if.h"
#include "opal/util/output.h"
#include "opal/util/show_help.h"
#include "opal/util/string_copy.h"
#define LOG_PREFIX "mca: if: linux_ipv6: "
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},
};
#if OPAL_ENABLE_IPV6
static bool hex2int(char hex, int *dst)
{
if ('0' <= hex && hex <= '9') {
*dst = hex - '0';
} else if ('A' <= hex && hex <= 'F') {
*dst = hex - 'A' + 10;
} else if ('a' <= hex && hex <= 'f') {
*dst = hex - 'a' + 10;
} else {
return false;
}
return true;
}
static bool hexdecode(const char *src, uint8_t *dst, size_t dstsize)
{
int hi, lo;
for (size_t i = 0; i < dstsize; i++) {
if (hex2int(src[i * 2], &hi) && hex2int(src[i * 2 + 1], &lo)) {
dst[i] = 16 * hi + lo;
} else {
return false;
}
}
return true;
}
#endif
static int if_linux_ipv6_open(void)
{
#if OPAL_ENABLE_IPV6
FILE *f;
if ((f = fopen("/proc/net/if_inet6", "r"))) {
char ifname[OPAL_IF_NAMESIZE];
unsigned int idx, pfxlen, scope, dadstat;
struct in6_addr a6;
uint32_t flag;
char addrhex[sizeof a6.s6_addr * 2 + 1];
char addrstr[INET6_ADDRSTRLEN];
while (fscanf(f, "%s %x %x %x %x %s\n", addrhex, &idx, &pfxlen, &scope, &dadstat, ifname)
!= EOF) {
opal_if_t *intf;
if (!hexdecode(addrhex, a6.s6_addr, sizeof a6.s6_addr)) {
const char *hostname;
hostname = opal_gethostname();
opal_show_help("help-opal-if-linux-ipv6.txt", "fail to parse if_inet6", true,
hostname, ifname, addrhex);
continue;
};
inet_ntop(AF_INET6, a6.s6_addr, addrstr, sizeof addrstr);
opal_output_verbose(1, opal_if_base_framework.framework_output,
LOG_PREFIX "found interface %s inet6 %s scope %x\n", ifname,
addrstr, scope);
/* Only interested in global (0x00) scope */
if (scope != 0x00) {
opal_output_verbose(1, opal_if_base_framework.framework_output,
LOG_PREFIX "skipped interface %s inet6 %s scope %x\n", ifname,
addrstr, scope);
continue;
}
intf = OBJ_NEW(opal_if_t);
if (NULL == intf) {
opal_output(0, LOG_PREFIX "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;
/* now construct the opal_if_t */
opal_string_copy(intf->if_name, ifname, OPAL_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,
LOG_PREFIX "added interface %s inet6 %s scope %x\n", ifname,
addrstr, scope);
} /* of while */
fclose(f);
}
#endif /* OPAL_ENABLE_IPV6 */
return OPAL_SUCCESS;
}
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