2010-12-17 01:56:54 +00:00
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/*
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* An implementation of key value pair (KVP) functionality for Linux.
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*
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*
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* Copyright (C) 2010, Novell, Inc.
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* Author : K. Y. Srinivasan <ksrinivasan@novell.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/poll.h>
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#include <sys/utsname.h>
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#include <linux/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <arpa/inet.h>
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#include <linux/connector.h>
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#include <linux/netlink.h>
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#include <ifaddrs.h>
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#include <netdb.h>
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#include <syslog.h>
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/*
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* KYS: TODO. Need to register these in the kernel.
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*
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* The following definitions are shared with the in-kernel component; do not
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* change any of this without making the corresponding changes in
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* the KVP kernel component.
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*/
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#define CN_KVP_IDX 0x9 /* MSFT KVP functionality */
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#define CN_KVP_VAL 0x1 /* This supports queries from the kernel */
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#define CN_KVP_USER_VAL 0x2 /* This supports queries from the user */
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/*
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* KVP protocol: The user mode component first registers with the
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* the kernel component. Subsequently, the kernel component requests, data
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* for the specified keys. In response to this message the user mode component
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* fills in the value corresponding to the specified key. We overload the
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* sequence field in the cn_msg header to define our KVP message types.
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*
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* We use this infrastructure for also supporting queries from user mode
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* application for state that may be maintained in the KVP kernel component.
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*
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* XXXKYS: Have a shared header file between the user and kernel (TODO)
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*/
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enum kvp_op {
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KVP_REGISTER = 0, /* Register the user mode component*/
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KVP_KERNEL_GET, /*Kernel is requesting the value for the specified key*/
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KVP_KERNEL_SET, /*Kernel is providing the value for the specified key*/
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KVP_USER_GET, /*User is requesting the value for the specified key*/
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KVP_USER_SET /*User is providing the value for the specified key*/
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};
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#define HV_KVP_EXCHANGE_MAX_KEY_SIZE 512
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#define HV_KVP_EXCHANGE_MAX_VALUE_SIZE 2048
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struct hv_ku_msg {
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__u32 kvp_index;
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__u8 kvp_key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; /* Key name */
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__u8 kvp_value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; /* Key value */
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};
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enum key_index {
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FullyQualifiedDomainName = 0,
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IntegrationServicesVersion, /*This key is serviced in the kernel*/
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NetworkAddressIPv4,
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NetworkAddressIPv6,
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OSBuildNumber,
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OSName,
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OSMajorVersion,
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OSMinorVersion,
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OSVersion,
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ProcessorArchitecture
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};
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/*
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* End of shared definitions.
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*/
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static char kvp_send_buffer[4096];
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static char kvp_recv_buffer[4096];
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static struct sockaddr_nl addr;
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2011-03-22 09:02:17 +00:00
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static char *os_name = "";
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static char *os_major = "";
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static char *os_minor = "";
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static char *processor_arch;
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static char *os_build;
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2010-12-17 01:56:54 +00:00
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static char *lic_version;
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2011-03-22 09:02:17 +00:00
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static struct utsname uts_buf;
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2010-12-17 01:56:54 +00:00
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void kvp_get_os_info(void)
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{
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FILE *file;
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2011-03-22 09:02:17 +00:00
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char *p, buf[512];
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2010-12-17 01:56:54 +00:00
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2011-03-22 09:02:17 +00:00
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uname(&uts_buf);
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os_build = uts_buf.release;
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2011-07-19 18:44:20 +00:00
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processor_arch = uts_buf.machine;
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2010-12-17 01:56:54 +00:00
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file = fopen("/etc/SuSE-release", "r");
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if (file != NULL)
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goto kvp_osinfo_found;
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file = fopen("/etc/redhat-release", "r");
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if (file != NULL)
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goto kvp_osinfo_found;
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/*
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* Add code for other supported platforms.
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*/
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/*
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* We don't have information about the os.
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*/
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2011-03-22 09:02:17 +00:00
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os_name = uts_buf.sysname;
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2010-12-17 01:56:54 +00:00
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return;
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kvp_osinfo_found:
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2011-03-22 09:02:17 +00:00
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/* up to three lines */
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p = fgets(buf, sizeof(buf), file);
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if (p) {
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p = strchr(buf, '\n');
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if (p)
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*p = '\0';
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p = strdup(buf);
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if (!p)
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goto done;
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os_name = p;
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/* second line */
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p = fgets(buf, sizeof(buf), file);
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if (p) {
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p = strchr(buf, '\n');
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if (p)
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*p = '\0';
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p = strdup(buf);
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if (!p)
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goto done;
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os_major = p;
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/* third line */
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p = fgets(buf, sizeof(buf), file);
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if (p) {
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p = strchr(buf, '\n');
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if (p)
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*p = '\0';
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p = strdup(buf);
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if (p)
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os_minor = p;
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}
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}
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}
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done:
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2010-12-17 01:56:54 +00:00
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fclose(file);
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return;
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}
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static int
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kvp_get_ip_address(int family, char *buffer, int length)
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{
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struct ifaddrs *ifap;
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struct ifaddrs *curp;
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int ipv4_len = strlen("255.255.255.255") + 1;
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int ipv6_len = strlen("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")+1;
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int offset = 0;
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const char *str;
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char tmp[50];
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int error = 0;
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/*
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* On entry into this function, the buffer is capable of holding the
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* maximum key value (2048 bytes).
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*/
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if (getifaddrs(&ifap)) {
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strcpy(buffer, "getifaddrs failed\n");
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return 1;
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}
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curp = ifap;
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while (curp != NULL) {
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if ((curp->ifa_addr != NULL) &&
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(curp->ifa_addr->sa_family == family)) {
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if (family == AF_INET) {
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struct sockaddr_in *addr =
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(struct sockaddr_in *) curp->ifa_addr;
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str = inet_ntop(family, &addr->sin_addr,
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tmp, 50);
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if (str == NULL) {
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strcpy(buffer, "inet_ntop failed\n");
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error = 1;
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goto getaddr_done;
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}
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if (offset == 0)
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strcpy(buffer, tmp);
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else
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strcat(buffer, tmp);
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strcat(buffer, ";");
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offset += strlen(str) + 1;
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if ((length - offset) < (ipv4_len + 1))
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goto getaddr_done;
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} else {
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/*
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* We only support AF_INET and AF_INET6
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2011-03-31 01:57:33 +00:00
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* and the list of addresses is separated by a ";".
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2010-12-17 01:56:54 +00:00
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*/
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struct sockaddr_in6 *addr =
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(struct sockaddr_in6 *) curp->ifa_addr;
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str = inet_ntop(family,
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&addr->sin6_addr.s6_addr,
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tmp, 50);
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if (str == NULL) {
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strcpy(buffer, "inet_ntop failed\n");
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error = 1;
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goto getaddr_done;
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}
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if (offset == 0)
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strcpy(buffer, tmp);
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else
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strcat(buffer, tmp);
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strcat(buffer, ";");
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offset += strlen(str) + 1;
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if ((length - offset) < (ipv6_len + 1))
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goto getaddr_done;
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}
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}
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curp = curp->ifa_next;
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}
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getaddr_done:
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freeifaddrs(ifap);
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return error;
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}
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static int
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kvp_get_domain_name(char *buffer, int length)
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{
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struct addrinfo hints, *info ;
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gethostname(buffer, length);
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int error = 0;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_CANONNAME;
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error = getaddrinfo(buffer, "http", &hints, &info);
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if (error != 0) {
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strcpy(buffer, "getaddrinfo failed\n");
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error = 1;
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goto get_domain_done;
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}
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strcpy(buffer, info->ai_canonname);
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get_domain_done:
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freeaddrinfo(info);
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return error;
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}
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static int
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netlink_send(int fd, struct cn_msg *msg)
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{
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struct nlmsghdr *nlh;
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unsigned int size;
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struct msghdr message;
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char buffer[64];
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struct iovec iov[2];
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size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
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nlh = (struct nlmsghdr *)buffer;
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nlh->nlmsg_seq = 0;
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nlh->nlmsg_pid = getpid();
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nlh->nlmsg_type = NLMSG_DONE;
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nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
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nlh->nlmsg_flags = 0;
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iov[0].iov_base = nlh;
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iov[0].iov_len = sizeof(*nlh);
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iov[1].iov_base = msg;
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iov[1].iov_len = size;
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memset(&message, 0, sizeof(message));
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message.msg_name = &addr;
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message.msg_namelen = sizeof(addr);
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message.msg_iov = iov;
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message.msg_iovlen = 2;
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return sendmsg(fd, &message, 0);
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}
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2011-03-22 09:02:17 +00:00
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int main(void)
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2010-12-17 01:56:54 +00:00
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{
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int fd, len, sock_opt;
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int error;
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struct cn_msg *message;
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struct pollfd pfd;
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struct nlmsghdr *incoming_msg;
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struct cn_msg *incoming_cn_msg;
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2011-03-22 09:02:17 +00:00
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struct hv_ku_msg *hv_msg;
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char *p;
|
2010-12-17 01:56:54 +00:00
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char *key_value;
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char *key_name;
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daemon(1, 0);
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openlog("KVP", 0, LOG_USER);
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syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
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/*
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* Retrieve OS release information.
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*/
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kvp_get_os_info();
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fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
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if (fd < 0) {
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syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
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exit(-1);
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}
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addr.nl_family = AF_NETLINK;
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addr.nl_pad = 0;
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addr.nl_pid = 0;
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addr.nl_groups = CN_KVP_IDX;
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error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
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if (error < 0) {
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syslog(LOG_ERR, "bind failed; error:%d", error);
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close(fd);
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exit(-1);
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}
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sock_opt = addr.nl_groups;
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setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt));
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/*
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* Register ourselves with the kernel.
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*/
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message = (struct cn_msg *)kvp_send_buffer;
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message->id.idx = CN_KVP_IDX;
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message->id.val = CN_KVP_VAL;
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message->seq = KVP_REGISTER;
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message->ack = 0;
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message->len = 0;
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len = netlink_send(fd, message);
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if (len < 0) {
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syslog(LOG_ERR, "netlink_send failed; error:%d", len);
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close(fd);
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exit(-1);
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}
|
|
|
|
|
|
|
|
pfd.fd = fd;
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
pfd.events = POLLIN;
|
|
|
|
pfd.revents = 0;
|
|
|
|
poll(&pfd, 1, -1);
|
|
|
|
|
|
|
|
len = recv(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0);
|
|
|
|
|
|
|
|
if (len < 0) {
|
|
|
|
syslog(LOG_ERR, "recv failed; error:%d", len);
|
|
|
|
close(fd);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
|
|
|
|
incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
|
|
|
|
|
|
|
|
switch (incoming_cn_msg->seq) {
|
|
|
|
case KVP_REGISTER:
|
|
|
|
/*
|
|
|
|
* Driver is registering with us; stash away the version
|
|
|
|
* information.
|
|
|
|
*/
|
2011-03-22 09:02:17 +00:00
|
|
|
p = (char *)incoming_cn_msg->data;
|
|
|
|
lic_version = malloc(strlen(p) + 1);
|
2010-12-17 01:56:54 +00:00
|
|
|
if (lic_version) {
|
2011-03-22 09:02:17 +00:00
|
|
|
strcpy(lic_version, p);
|
2010-12-17 01:56:54 +00:00
|
|
|
syslog(LOG_INFO, "KVP LIC Version: %s",
|
|
|
|
lic_version);
|
|
|
|
} else {
|
|
|
|
syslog(LOG_ERR, "malloc failed");
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case KVP_KERNEL_GET:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2011-03-22 09:02:17 +00:00
|
|
|
hv_msg = (struct hv_ku_msg *)incoming_cn_msg->data;
|
|
|
|
key_name = (char *)hv_msg->kvp_key;
|
|
|
|
key_value = (char *)hv_msg->kvp_value;
|
2010-12-17 01:56:54 +00:00
|
|
|
|
2011-03-22 09:02:17 +00:00
|
|
|
switch (hv_msg->kvp_index) {
|
2010-12-17 01:56:54 +00:00
|
|
|
case FullyQualifiedDomainName:
|
|
|
|
kvp_get_domain_name(key_value,
|
|
|
|
HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
|
|
|
|
strcpy(key_name, "FullyQualifiedDomainName");
|
|
|
|
break;
|
|
|
|
case IntegrationServicesVersion:
|
|
|
|
strcpy(key_name, "IntegrationServicesVersion");
|
|
|
|
strcpy(key_value, lic_version);
|
|
|
|
break;
|
|
|
|
case NetworkAddressIPv4:
|
|
|
|
kvp_get_ip_address(AF_INET, key_value,
|
|
|
|
HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
|
|
|
|
strcpy(key_name, "NetworkAddressIPv4");
|
|
|
|
break;
|
|
|
|
case NetworkAddressIPv6:
|
|
|
|
kvp_get_ip_address(AF_INET6, key_value,
|
|
|
|
HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
|
|
|
|
strcpy(key_name, "NetworkAddressIPv6");
|
|
|
|
break;
|
|
|
|
case OSBuildNumber:
|
|
|
|
strcpy(key_value, os_build);
|
|
|
|
strcpy(key_name, "OSBuildNumber");
|
|
|
|
break;
|
|
|
|
case OSName:
|
|
|
|
strcpy(key_value, os_name);
|
|
|
|
strcpy(key_name, "OSName");
|
|
|
|
break;
|
|
|
|
case OSMajorVersion:
|
|
|
|
strcpy(key_value, os_major);
|
|
|
|
strcpy(key_name, "OSMajorVersion");
|
|
|
|
break;
|
|
|
|
case OSMinorVersion:
|
|
|
|
strcpy(key_value, os_minor);
|
|
|
|
strcpy(key_name, "OSMinorVersion");
|
|
|
|
break;
|
|
|
|
case OSVersion:
|
|
|
|
strcpy(key_value, os_build);
|
|
|
|
strcpy(key_name, "OSVersion");
|
|
|
|
break;
|
|
|
|
case ProcessorArchitecture:
|
|
|
|
strcpy(key_value, processor_arch);
|
|
|
|
strcpy(key_name, "ProcessorArchitecture");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
strcpy(key_value, "Unknown Key");
|
|
|
|
/*
|
|
|
|
* We use a null key name to terminate enumeration.
|
|
|
|
*/
|
|
|
|
strcpy(key_name, "");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Send the value back to the kernel. The response is
|
|
|
|
* already in the receive buffer. Update the cn_msg header to
|
|
|
|
* reflect the key value that has been added to the message
|
|
|
|
*/
|
|
|
|
|
|
|
|
incoming_cn_msg->id.idx = CN_KVP_IDX;
|
|
|
|
incoming_cn_msg->id.val = CN_KVP_VAL;
|
|
|
|
incoming_cn_msg->seq = KVP_USER_SET;
|
|
|
|
incoming_cn_msg->ack = 0;
|
|
|
|
incoming_cn_msg->len = sizeof(struct hv_ku_msg);
|
|
|
|
|
|
|
|
len = netlink_send(fd, incoming_cn_msg);
|
|
|
|
if (len < 0) {
|
|
|
|
syslog(LOG_ERR, "net_link send failed; error:%d", len);
|
|
|
|
exit(-1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|