--- /dev/null
+/*
+ * rlm_soh.c
+ *
+ * Version: $Id$
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * Copyright 2010 Phil Mayers <p.mayers@imperial.ac.uk>
+ */
+
+#include <freeradius-devel/ident.h>
+RCSID("$Id$")
+
+#include <freeradius-devel/radiusd.h>
+#include <freeradius-devel/modules.h>
+#include <freeradius-devel/dhcp.h>
+#include <freeradius-devel/soh.h>
+
+
+typedef struct rlm_soh_t {
+ const char *xlat_name;
+ int dhcp;
+} rlm_soh_t;
+
+
+/*
+ * Not sure how to make this useful yet...
+ */
+static size_t soh_xlat(void *instance, REQUEST *request, char *fmt, char *out, size_t outlen, RADIUS_ESCAPE_STRING func) {
+
+ VALUE_PAIR* vp[6];
+ char buf[256], *osvendor, *osname;
+ rlm_soh_t *inst = instance;
+
+
+ func = func; /* -Wunused */
+
+ /* there will be no point unless SoH-Supported = yes
+ *
+ * FIXME: should have a #define for the attribute...
+ * SoH-Supported == 2119 in dictionary.freeradius.internal
+ */
+ vp[0] = pairfind(request->packet->vps, 2119);
+ if (!vp[0])
+ return 0;
+
+
+ if (strncasecmp(fmt, "OS", 2) == 0) {
+ /* OS vendor */
+ vp[0] = pairfind(request->packet->vps, 2100);
+ vp[1] = pairfind(request->packet->vps, 2101);
+ vp[2] = pairfind(request->packet->vps, 2102);
+ vp[3] = pairfind(request->packet->vps, 2103);
+ vp[4] = pairfind(request->packet->vps, 2104);
+ vp[5] = pairfind(request->packet->vps, 2105);
+
+ if (vp[0] && vp[0]->vp_integer == 311) {
+ if (!vp[1]) {
+ snprintf(out, outlen, "Windows unknown");
+ } else {
+ switch (vp[1]->vp_integer) {
+ case 7:
+ osname = "7";
+ break;
+ case 6:
+ osname = "Vista";
+ break;
+ case 5:
+ osname = "XP";
+ break;
+ default:
+ osname = "Other";
+ break;
+ }
+ snprintf(out, outlen, "Windows %s %d.%d.%d sp %d.%d", osname, vp[1]->vp_integer,
+ vp[2] ? vp[2]->vp_integer : 0,
+ vp[3] ? vp[3]->vp_integer : 0,
+ vp[4] ? vp[4]->vp_integer : 0,
+ vp[5] ? vp[5]->vp_integer : 0
+ );
+ }
+ return strlen(out);
+ }
+ }
+
+ return 0;
+}
+
+
+static const CONF_PARSER module_config[] = {
+ /*
+ * Do SoH over DHCP?
+ */
+ { "dhcp", PW_TYPE_BOOLEAN, offsetof(rlm_soh_t,dhcp), NULL, "no" },
+
+ { NULL, -1, 0, NULL, NULL } /* end the list */
+};
+
+static int soh_detach(void *instance) {
+ rlm_soh_t *inst = instance;
+
+ if (inst->xlat_name) {
+ xlat_unregister(inst->xlat_name, soh_xlat);
+ free(inst->xlat_name);
+ }
+ free(instance);
+ return 0;
+}
+
+static int soh_instantiate(CONF_SECTION *conf, void **instance) {
+ rlm_soh_t *inst;
+
+ inst = *instance = rad_malloc(sizeof(*inst));
+ if (!inst) {
+ return -1;
+ }
+ memset(inst, 0, sizeof(*inst));
+
+ if (cf_section_parse(conf, inst, module_config) < 0) {
+ free(inst);
+ return -1;
+ }
+
+ inst->xlat_name = cf_section_name2(conf);
+ if (!inst->xlat_name) inst->xlat_name = cf_section_name1(conf);
+ inst->xlat_name = strdup(inst->xlat_name);
+ xlat_register(inst->xlat_name, soh_xlat, inst);
+
+ return 0;
+}
+
+static int soh_postauth(void * instance, REQUEST *request) {
+ rlm_soh_t *inst = instance;
+ VALUE_PAIR *vp, *sohvp;
+ int rv;
+
+#ifdef WITH_DHCP
+ vp = pairfind(request->packet->vps, DHCP2ATTR(43));
+ if (vp) {
+ /*
+ * vendor-specific options contain
+ *
+ * vendor opt 220/0xdc - SoH payload, or null byte to probe, or string
+ * "NAP" to indicate server-side support for SoH in OFFERs
+ *
+ * vendor opt 222/0xde - SoH correlation ID as utf-16 string, yuck...
+ */
+ uint8_t vopt, vlen, *data;
+
+ data = vp->vp_octets;
+ while (data < vp->vp_octets + vp->length) {
+ vopt = *data++;
+ vlen = *data++;
+ switch (vopt) {
+ case 220:
+ if (vlen <= 1) {
+ RDEBUG("SoH adding NAP marker to DHCP reply");
+ /* client probe; send "NAP" in the reply */
+ vp = paircreate(DHCP2ATTR(43), PW_TYPE_OCTETS);
+ vp->vp_octets[0] = 220;
+ vp->vp_octets[1] = 3;
+ vp->vp_octets[4] = 'N';
+ vp->vp_octets[3] = 'A';
+ vp->vp_octets[2] = 'P';
+ vp->length = 5;
+
+ pairadd(&request->reply->vps, vp);
+
+ } else {
+ RDEBUG("SoH decoding NAP from DHCP request");
+ /* SoH payload */
+ soh_verify(request, request->packet->vps, data, vlen);
+ }
+ break;
+ default:
+ /* nothing to do */
+ break;
+ }
+ data += vlen;
+ }
+ return RLM_MODULE_OK;
+ }
+#endif
+ return RLM_MODULE_NOOP;
+}
+
+static int soh_authorize(void * instance, REQUEST *request) {
+ rlm_soh_t *inst = instance;
+ VALUE_PAIR *vp, *sohvp;
+ int rv;
+
+ /* try to find the MS-SoH payload */
+ vp = pairfind(request->packet->vps, (311 | 16) | 55);
+ if (!vp) {
+ RDEBUG("SoH radius VP not found");
+ return RLM_MODULE_NOOP;
+ }
+
+ RDEBUG("SoH radius VP found");
+ /* decode it */
+ rv = soh_verify(request, request->packet->vps, vp->vp_strvalue, vp->length);
+
+ return RLM_MODULE_OK;
+}
+
+module_t rlm_soh = {
+ RLM_MODULE_INIT,
+ "SoH",
+ RLM_TYPE_THREAD_SAFE, /* type */
+ soh_instantiate, /* instantiation */
+ soh_detach, /* detach */
+ {
+ NULL, /* authenticate */
+ soh_authorize, /* authorize */
+ NULL, /* pre-accounting */
+ NULL, /* accounting */
+ NULL, /* checksimul */
+ NULL, /* pre-proxy */
+ NULL, /* post-proxy */
+ soh_postauth /* post-auth */
+ },
+};
projects / freeradius.git / commitdiff