813 lines
22 KiB
C
813 lines
22 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Distributed Universal Number Discovery (DUNDi)
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*
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "asterisk/frame.h"
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#include "asterisk/utils.h"
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#include "asterisk/dundi.h"
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#include "dundi-parser.h"
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static void internaloutput(const char *str)
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{
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fputs(str, stdout);
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}
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static void internalerror(const char *str)
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{
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fprintf(stderr, "WARNING: %s", str);
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}
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static void (*outputf)(const char *str) = internaloutput;
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static void (*errorf)(const char *str) = internalerror;
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char *dundi_eid_to_str_short(char *s, int maxlen, dundi_eid *eid)
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{
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int x;
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char *os = s;
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if (maxlen < 13) {
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if (s && (maxlen > 0))
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*s = '\0';
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} else {
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for (x=0;x<6;x++) {
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sprintf(s, "%02X", eid->eid[x]);
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s += 2;
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}
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}
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return os;
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}
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int dundi_str_short_to_eid(dundi_eid *eid, const char *s)
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{
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unsigned int eid_int[6];
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int x;
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if (sscanf(s, "%2x%2x%2x%2x%2x%2x", &eid_int[0], &eid_int[1], &eid_int[2],
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&eid_int[3], &eid_int[4], &eid_int[5]) != 6)
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return -1;
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for (x = 0; x < 6; x++)
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eid->eid[x] = eid_int[x];
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return 0;
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}
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int dundi_eid_zero(dundi_eid *eid)
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{
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int x;
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for (x = 0; x < ARRAY_LEN(eid->eid); x++)
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if (eid->eid[x]) return 0;
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return 1;
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}
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static void dump_string(char *output, int maxlen, void *value, int len)
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{
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if (maxlen > len + 1)
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maxlen = len + 1;
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snprintf(output, maxlen, "%s", (char *) value);
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}
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static void dump_cbypass(char *output, int maxlen, void *value, int len)
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{
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snprintf(output, maxlen, "Bypass Caches");
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}
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static void dump_eid(char *output, int maxlen, void *value, int len)
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{
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if (len == 6)
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ast_eid_to_str(output, maxlen, (dundi_eid *)value);
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else
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snprintf(output, maxlen, "Invalid EID len %d", len);
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}
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char *dundi_hint2str(char *buf, int bufsiz, int flags)
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{
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strcpy(buf, "");
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buf[bufsiz-1] = '\0';
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if (flags & DUNDI_HINT_TTL_EXPIRED) {
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strncat(buf, "TTLEXPIRED|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_HINT_DONT_ASK) {
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strncat(buf, "DONTASK|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_HINT_UNAFFECTED) {
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strncat(buf, "UNAFFECTED|", bufsiz - strlen(buf) - 1);
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}
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/* Get rid of trailing | */
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if (ast_strlen_zero(buf))
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strcpy(buf, "NONE|");
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buf[strlen(buf)-1] = '\0';
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return buf;
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}
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static void dump_hint(char *output, int maxlen, void *value, int len)
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{
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char tmp2[256];
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char tmp3[256];
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int datalen;
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struct dundi_hint *hint;
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if (len < sizeof(*hint)) {
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snprintf(output, maxlen, "<invalid contents>");
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return;
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}
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hint = (struct dundi_hint *) value;;
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datalen = len - offsetof(struct dundi_hint, data);
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if (datalen > sizeof(tmp3) - 1)
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datalen = sizeof(tmp3) - 1;
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memcpy(tmp3, hint->data, datalen);
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tmp3[datalen] = '\0';
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dundi_hint2str(tmp2, sizeof(tmp2), ntohs(hint->flags));
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if (ast_strlen_zero(tmp3))
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snprintf(output, maxlen, "[%s]", tmp2);
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else
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snprintf(output, maxlen, "[%s] %s", tmp2, tmp3);
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}
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static void dump_cause(char *output, int maxlen, void *value, int len)
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{
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static const char * const causes[] = {
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"SUCCESS",
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"GENERAL",
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"DYNAMIC",
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"NOAUTH" ,
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};
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char tmp2[256];
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struct dundi_cause *cause;
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int datalen;
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int causecode;
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if (len < sizeof(*cause)) {
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snprintf(output, maxlen, "<invalid contents>");
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return;
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}
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cause = (struct dundi_cause*) value;
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causecode = cause->causecode;
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datalen = len - offsetof(struct dundi_cause, desc);
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if (datalen > sizeof(tmp2) - 1)
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datalen = sizeof(tmp2) - 1;
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memcpy(tmp2, cause->desc, datalen);
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tmp2[datalen] = '\0';
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if (causecode < ARRAY_LEN(causes)) {
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if (ast_strlen_zero(tmp2))
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snprintf(output, maxlen, "%s", causes[causecode]);
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else
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snprintf(output, maxlen, "%s: %s", causes[causecode], tmp2);
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} else {
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if (ast_strlen_zero(tmp2))
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snprintf(output, maxlen, "%d", causecode);
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else
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snprintf(output, maxlen, "%d: %s", causecode, tmp2);
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}
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}
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static void dump_int(char *output, int maxlen, void *value, int len)
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{
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if (len == (int)sizeof(unsigned int))
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snprintf(output, maxlen, "%lu", (unsigned long)ntohl(*((unsigned int *)value)));
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else
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ast_copy_string(output, "Invalid INT", maxlen);
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}
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static void dump_short(char *output, int maxlen, void *value, int len)
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{
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if (len == (int)sizeof(unsigned short))
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snprintf(output, maxlen, "%d", ntohs(*((unsigned short *)value)));
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else
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ast_copy_string(output, "Invalid SHORT", maxlen);
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}
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static void dump_byte(char *output, int maxlen, void *value, int len)
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{
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if (len == (int)sizeof(unsigned char))
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snprintf(output, maxlen, "%d", *((unsigned char *)value));
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else
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ast_copy_string(output, "Invalid BYTE", maxlen);
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}
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static char *proto2str(int proto, char *buf, int bufsiz)
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{
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switch(proto) {
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case DUNDI_PROTO_NONE:
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strncpy(buf, "None", bufsiz - 1);
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break;
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case DUNDI_PROTO_IAX:
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strncpy(buf, "IAX", bufsiz - 1);
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break;
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case DUNDI_PROTO_SIP:
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strncpy(buf, "SIP", bufsiz - 1);
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break;
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case DUNDI_PROTO_H323:
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strncpy(buf, "H.323", bufsiz - 1);
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break;
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default:
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snprintf(buf, bufsiz, "Unknown Proto(%d)", proto);
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}
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buf[bufsiz-1] = '\0';
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return buf;
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}
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char *dundi_flags2str(char *buf, int bufsiz, int flags)
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{
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strcpy(buf, "");
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buf[bufsiz-1] = '\0';
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if (flags & DUNDI_FLAG_EXISTS) {
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strncat(buf, "EXISTS|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_MATCHMORE) {
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strncat(buf, "MATCHMORE|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_CANMATCH) {
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strncat(buf, "CANMATCH|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_IGNOREPAT) {
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strncat(buf, "IGNOREPAT|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_RESIDENTIAL) {
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strncat(buf, "RESIDENCE|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_COMMERCIAL) {
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strncat(buf, "COMMERCIAL|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_MOBILE) {
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strncat(buf, "MOBILE", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_NOUNSOLICITED) {
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strncat(buf, "NOUNSLCTD|", bufsiz - strlen(buf) - 1);
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}
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if (flags & DUNDI_FLAG_NOCOMUNSOLICIT) {
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strncat(buf, "NOCOMUNSLTD|", bufsiz - strlen(buf) - 1);
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}
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/* Get rid of trailing | */
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if (ast_strlen_zero(buf))
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strcpy(buf, "NONE|");
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buf[strlen(buf)-1] = '\0';
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return buf;
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}
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static void dump_answer(char *output, int maxlen, void *value, int len)
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{
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struct dundi_answer *answer;
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char proto[40];
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char flags[40];
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char eid_str[40];
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char tmp[512]="";
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int datalen;
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if (len < sizeof(*answer)) {
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snprintf(output, maxlen, "Invalid Answer");
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return;
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}
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answer = (struct dundi_answer *)(value);
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datalen = len - offsetof(struct dundi_answer, data);
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if (datalen > sizeof(tmp) - 1)
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datalen = sizeof(tmp) - 1;
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memcpy(tmp, answer->data, datalen);
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tmp[datalen] = '\0';
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ast_eid_to_str(eid_str, sizeof(eid_str), &answer->eid);
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snprintf(output, maxlen, "[%s] %d <%s/%s> from [%s]",
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dundi_flags2str(flags, sizeof(flags), ntohs(answer->flags)),
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ntohs(answer->weight),
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proto2str(answer->protocol, proto, sizeof(proto)),
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tmp, eid_str);
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}
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static void dump_encrypted(char *output, int maxlen, void *value, int len)
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{
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char iv[33];
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int x;
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if ((len > 16) && !(len % 16)) {
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/* Build up IV */
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for (x=0;x<16;x++) {
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snprintf(iv + (x << 1), 3, "%02x", ((unsigned char *)value)[x]);
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}
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snprintf(output, maxlen, "[IV %s] %d encrypted blocks\n", iv, len / 16);
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} else
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snprintf(output, maxlen, "Invalid Encrypted Datalen %d", len);
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}
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static void dump_raw(char *output, int maxlen, void *value, int len)
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{
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int x;
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unsigned char *u = value;
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output[maxlen - 1] = '\0';
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strcpy(output, "[ ");
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for (x=0;x<len;x++) {
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snprintf(output + strlen(output), maxlen - strlen(output) - 1, "%02x ", u[x]);
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}
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strncat(output + strlen(output), "]", maxlen - strlen(output) - 1);
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}
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static struct dundi_ie {
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int ie;
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char *name;
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void (*dump)(char *output, int maxlen, void *value, int len);
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} infoelts[] = {
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{ DUNDI_IE_EID, "ENTITY IDENT", dump_eid },
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{ DUNDI_IE_CALLED_CONTEXT, "CALLED CONTEXT", dump_string },
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{ DUNDI_IE_CALLED_NUMBER, "CALLED NUMBER", dump_string },
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{ DUNDI_IE_EID_DIRECT, "DIRECT EID", dump_eid },
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{ DUNDI_IE_ANSWER, "ANSWER", dump_answer },
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{ DUNDI_IE_TTL, "TTL", dump_short },
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{ DUNDI_IE_VERSION, "VERSION", dump_short },
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{ DUNDI_IE_EXPIRATION, "EXPIRATION", dump_short },
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{ DUNDI_IE_UNKNOWN, "UKWN DUNDI CMD", dump_byte },
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{ DUNDI_IE_CAUSE, "CAUSE", dump_cause },
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{ DUNDI_IE_REQEID, "REQUEST EID", dump_eid },
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{ DUNDI_IE_ENCDATA, "ENCDATA", dump_encrypted },
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{ DUNDI_IE_SHAREDKEY, "SHAREDKEY", dump_raw },
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{ DUNDI_IE_SIGNATURE, "SIGNATURE", dump_raw },
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{ DUNDI_IE_KEYCRC32, "KEYCRC32", dump_int },
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{ DUNDI_IE_HINT, "HINT", dump_hint },
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{ DUNDI_IE_DEPARTMENT, "DEPARTMENT", dump_string },
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{ DUNDI_IE_ORGANIZATION, "ORGANIZTN", dump_string },
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{ DUNDI_IE_LOCALITY, "LOCALITY", dump_string },
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{ DUNDI_IE_STATE_PROV, "STATEPROV", dump_string },
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{ DUNDI_IE_COUNTRY, "COUNTRY", dump_string },
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{ DUNDI_IE_EMAIL, "EMAIL", dump_string },
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{ DUNDI_IE_PHONE, "PHONE", dump_string },
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{ DUNDI_IE_IPADDR, "ADDRESS", dump_string },
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{ DUNDI_IE_CACHEBYPASS, "CBYPASS", dump_cbypass },
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};
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const char *dundi_ie2str(int ie)
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{
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int x;
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for (x = 0; x < ARRAY_LEN(infoelts); x++) {
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if (infoelts[x].ie == ie)
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return infoelts[x].name;
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}
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return "Unknown IE";
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}
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static void dump_ies(unsigned char *iedata, int spaces, int len)
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{
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int ielen;
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int ie;
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int x;
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int found;
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char interp[1024];
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char tmp[1024];
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if (len < 2)
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return;
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while(len >= 2) {
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ie = iedata[0];
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ielen = iedata[1];
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/* Encrypted data is the remainder */
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if (ie == DUNDI_IE_ENCDATA)
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ielen = len - 2;
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if (ielen + 2> len) {
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snprintf(tmp, (int)sizeof(tmp), "Total IE length of %d bytes exceeds remaining frame length of %d bytes\n", ielen + 2, len);
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outputf(tmp);
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return;
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}
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found = 0;
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for (x = 0; x < ARRAY_LEN(infoelts); x++) {
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if (infoelts[x].ie == ie) {
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if (infoelts[x].dump) {
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infoelts[x].dump(interp, (int)sizeof(interp), iedata + 2, ielen);
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snprintf(tmp, (int)sizeof(tmp), " %s%-15.15s : %s\n", (spaces ? " " : "" ), infoelts[x].name, interp);
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outputf(tmp);
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} else {
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if (ielen)
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snprintf(interp, (int)sizeof(interp), "%d bytes", ielen);
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else
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strcpy(interp, "Present");
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snprintf(tmp, (int)sizeof(tmp), " %s%-15.15s : %s\n", (spaces ? " " : "" ), infoelts[x].name, interp);
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outputf(tmp);
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}
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found++;
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}
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}
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if (!found) {
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snprintf(tmp, (int)sizeof(tmp), " %sUnknown IE %03d : Present\n", (spaces ? " " : "" ), ie);
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outputf(tmp);
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}
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iedata += (2 + ielen);
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len -= (2 + ielen);
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}
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outputf("\n");
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}
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void dundi_showframe(struct dundi_hdr *fhi, int rx, struct sockaddr_in *sin, int datalen)
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{
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char *pref[] = {
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"Tx",
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"Rx",
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" ETx",
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" Erx" };
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char *commands[] = {
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"ACK ",
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"DPDISCOVER ",
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"DPRESPONSE ",
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"EIDQUERY ",
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"EIDRESPONSE ",
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"PRECACHERQ ",
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"PRECACHERP ",
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"INVALID ",
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"UNKNOWN CMD ",
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"NULL ",
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"REQREQ ",
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"REGRESPONSE ",
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"CANCEL ",
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"ENCRYPT ",
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"ENCREJ " };
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char class2[20];
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char *class;
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char subclass2[20];
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char *subclass;
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char tmp[256];
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char retries[20];
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if (ntohs(fhi->dtrans) & DUNDI_FLAG_RETRANS)
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strcpy(retries, "Yes");
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else
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strcpy(retries, "No");
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if ((ntohs(fhi->strans) & DUNDI_FLAG_RESERVED)) {
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/* Ignore frames with high bit set to 1 */
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return;
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}
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if ((fhi->cmdresp & 0x3f) > (int)sizeof(commands)/(int)sizeof(char *)) {
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snprintf(class2, (int)sizeof(class2), "(%d?)", fhi->cmdresp);
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class = class2;
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} else {
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class = commands[(int)(fhi->cmdresp & 0x3f)];
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}
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snprintf(subclass2, (int)sizeof(subclass2), "%02x", fhi->cmdflags);
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subclass = subclass2;
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snprintf(tmp, (int)sizeof(tmp),
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"%s-Frame Retry[%s] -- OSeqno: %3.3d ISeqno: %3.3d Type: %s (%s)\n",
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pref[rx],
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retries, fhi->oseqno, fhi->iseqno, class, fhi->cmdresp & 0x40 ? "Response" : "Command");
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outputf(tmp);
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|
snprintf(tmp, (int)sizeof(tmp),
|
|
"%s Flags: %s STrans: %5.5d DTrans: %5.5d [%s:%d]%s\n", (rx > 1) ? " " : "",
|
|
subclass, ntohs(fhi->strans) & ~DUNDI_FLAG_RESERVED, ntohs(fhi->dtrans) & ~DUNDI_FLAG_RETRANS,
|
|
ast_inet_ntoa(sin->sin_addr), ntohs(sin->sin_port),
|
|
fhi->cmdresp & 0x80 ? " (Final)" : "");
|
|
outputf(tmp);
|
|
dump_ies(fhi->ies, rx > 1, datalen);
|
|
}
|
|
|
|
int dundi_ie_append_raw(struct dundi_ie_data *ied, unsigned char ie, void *data, int datalen)
|
|
{
|
|
char tmp[256];
|
|
if (datalen > ((int)sizeof(ied->buf) - ied->pos)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Out of space for ie '%s' (%d), need %d have %d\n", dundi_ie2str(ie), ie, datalen, (int)sizeof(ied->buf) - ied->pos);
|
|
errorf(tmp);
|
|
return -1;
|
|
}
|
|
ied->buf[ied->pos++] = ie;
|
|
ied->buf[ied->pos++] = datalen;
|
|
memcpy(ied->buf + ied->pos, data, datalen);
|
|
ied->pos += datalen;
|
|
return 0;
|
|
}
|
|
|
|
int dundi_ie_append_cause(struct dundi_ie_data *ied, unsigned char ie, unsigned char cause, char *data)
|
|
{
|
|
char tmp[256];
|
|
int datalen = data ? strlen(data) + 1 : 1;
|
|
if (datalen > ((int)sizeof(ied->buf) - ied->pos)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Out of space for ie '%s' (%d), need %d have %d\n", dundi_ie2str(ie), ie, datalen, (int)sizeof(ied->buf) - ied->pos);
|
|
errorf(tmp);
|
|
return -1;
|
|
}
|
|
ied->buf[ied->pos++] = ie;
|
|
ied->buf[ied->pos++] = datalen;
|
|
ied->buf[ied->pos++] = cause;
|
|
memcpy(ied->buf + ied->pos, data, datalen-1);
|
|
ied->pos += datalen-1;
|
|
return 0;
|
|
}
|
|
|
|
int dundi_ie_append_hint(struct dundi_ie_data *ied, unsigned char ie, unsigned short flags, char *data)
|
|
{
|
|
char tmp[256];
|
|
int datalen = data ? strlen(data) + 2 : 2;
|
|
if (datalen > ((int)sizeof(ied->buf) - ied->pos)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Out of space for ie '%s' (%d), need %d have %d\n", dundi_ie2str(ie), ie, datalen, (int)sizeof(ied->buf) - ied->pos);
|
|
errorf(tmp);
|
|
return -1;
|
|
}
|
|
ied->buf[ied->pos++] = ie;
|
|
ied->buf[ied->pos++] = datalen;
|
|
flags = htons(flags);
|
|
memcpy(ied->buf + ied->pos, &flags, sizeof(flags));
|
|
ied->pos += 2;
|
|
memcpy(ied->buf + ied->pos, data, datalen-1);
|
|
ied->pos += datalen-2;
|
|
return 0;
|
|
}
|
|
|
|
int dundi_ie_append_encdata(struct dundi_ie_data *ied, unsigned char ie, unsigned char *iv, void *data, int datalen)
|
|
{
|
|
char tmp[256];
|
|
datalen += 16;
|
|
if (datalen > ((int)sizeof(ied->buf) - ied->pos)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Out of space for ie '%s' (%d), need %d have %d\n", dundi_ie2str(ie), ie, datalen, (int)sizeof(ied->buf) - ied->pos);
|
|
errorf(tmp);
|
|
return -1;
|
|
}
|
|
ied->buf[ied->pos++] = ie;
|
|
ied->buf[ied->pos++] = datalen;
|
|
memcpy(ied->buf + ied->pos, iv, 16);
|
|
ied->pos += 16;
|
|
if (data) {
|
|
memcpy(ied->buf + ied->pos, data, datalen-16);
|
|
ied->pos += datalen-16;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int dundi_ie_append_answer(struct dundi_ie_data *ied, unsigned char ie, dundi_eid *eid, unsigned char protocol, unsigned short flags, unsigned short weight, char *data)
|
|
{
|
|
char tmp[256];
|
|
int datalen = data ? strlen(data) + 11 : 11;
|
|
int x;
|
|
unsigned short myw;
|
|
if (datalen > ((int)sizeof(ied->buf) - ied->pos)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Out of space for ie '%s' (%d), need %d have %d\n", dundi_ie2str(ie), ie, datalen, (int)sizeof(ied->buf) - ied->pos);
|
|
errorf(tmp);
|
|
return -1;
|
|
}
|
|
ied->buf[ied->pos++] = ie;
|
|
ied->buf[ied->pos++] = datalen;
|
|
for (x=0;x<6;x++)
|
|
ied->buf[ied->pos++] = eid->eid[x];
|
|
ied->buf[ied->pos++] = protocol;
|
|
myw = htons(flags);
|
|
memcpy(ied->buf + ied->pos, &myw, 2);
|
|
ied->pos += 2;
|
|
myw = htons(weight);
|
|
memcpy(ied->buf + ied->pos, &myw, 2);
|
|
ied->pos += 2;
|
|
memcpy(ied->buf + ied->pos, data, datalen-11);
|
|
ied->pos += datalen-11;
|
|
return 0;
|
|
}
|
|
|
|
int dundi_ie_append_addr(struct dundi_ie_data *ied, unsigned char ie, struct sockaddr_in *sin)
|
|
{
|
|
return dundi_ie_append_raw(ied, ie, sin, (int)sizeof(struct sockaddr_in));
|
|
}
|
|
|
|
int dundi_ie_append_int(struct dundi_ie_data *ied, unsigned char ie, unsigned int value)
|
|
{
|
|
unsigned int newval;
|
|
newval = htonl(value);
|
|
return dundi_ie_append_raw(ied, ie, &newval, (int)sizeof(newval));
|
|
}
|
|
|
|
int dundi_ie_append_short(struct dundi_ie_data *ied, unsigned char ie, unsigned short value)
|
|
{
|
|
unsigned short newval;
|
|
newval = htons(value);
|
|
return dundi_ie_append_raw(ied, ie, &newval, (int)sizeof(newval));
|
|
}
|
|
|
|
int dundi_ie_append_str(struct dundi_ie_data *ied, unsigned char ie, char *str)
|
|
{
|
|
return dundi_ie_append_raw(ied, ie, str, strlen(str));
|
|
}
|
|
|
|
int dundi_ie_append_eid(struct dundi_ie_data *ied, unsigned char ie, dundi_eid *eid)
|
|
{
|
|
return dundi_ie_append_raw(ied, ie, (unsigned char *)eid, sizeof(dundi_eid));
|
|
}
|
|
|
|
int dundi_ie_append_byte(struct dundi_ie_data *ied, unsigned char ie, unsigned char dat)
|
|
{
|
|
return dundi_ie_append_raw(ied, ie, &dat, 1);
|
|
}
|
|
|
|
int dundi_ie_append(struct dundi_ie_data *ied, unsigned char ie)
|
|
{
|
|
return dundi_ie_append_raw(ied, ie, NULL, 0);
|
|
}
|
|
|
|
void dundi_set_output(void (*func)(const char *))
|
|
{
|
|
outputf = func;
|
|
}
|
|
|
|
void dundi_set_error(void (*func)(const char *))
|
|
{
|
|
errorf = func;
|
|
}
|
|
|
|
int dundi_parse_ies(struct dundi_ies *ies, unsigned char *data, int datalen)
|
|
{
|
|
/* Parse data into information elements */
|
|
int len;
|
|
int ie;
|
|
char tmp[256];
|
|
memset(ies, 0, (int)sizeof(struct dundi_ies));
|
|
ies->ttl = -1;
|
|
ies->expiration = -1;
|
|
ies->unknowncmd = -1;
|
|
ies->cause = -1;
|
|
while(datalen >= 2) {
|
|
ie = data[0];
|
|
len = data[1];
|
|
if (len > datalen - 2) {
|
|
errorf("Information element length exceeds message size\n");
|
|
return -1;
|
|
}
|
|
switch(ie) {
|
|
case DUNDI_IE_EID:
|
|
case DUNDI_IE_EID_DIRECT:
|
|
if (len != (int)sizeof(dundi_eid)) {
|
|
errorf("Improper entity identifer, expecting 6 bytes!\n");
|
|
} else if (ies->eidcount < DUNDI_MAX_STACK) {
|
|
ies->eids[ies->eidcount] = (dundi_eid *)(data + 2);
|
|
ies->eid_direct[ies->eidcount] = (ie == DUNDI_IE_EID_DIRECT);
|
|
ies->eidcount++;
|
|
} else
|
|
errorf("Too many entities in stack!\n");
|
|
break;
|
|
case DUNDI_IE_REQEID:
|
|
if (len != (int)sizeof(dundi_eid)) {
|
|
errorf("Improper requested entity identifer, expecting 6 bytes!\n");
|
|
} else
|
|
ies->reqeid = (dundi_eid *)(data + 2);
|
|
break;
|
|
case DUNDI_IE_CALLED_CONTEXT:
|
|
ies->called_context = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_CALLED_NUMBER:
|
|
ies->called_number = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_ANSWER:
|
|
if (len < sizeof(struct dundi_answer)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Answer expected to be >=%d bytes long but was %d\n", (int)sizeof(struct dundi_answer), len);
|
|
errorf(tmp);
|
|
} else {
|
|
if (ies->anscount < DUNDI_MAX_ANSWERS)
|
|
ies->answers[ies->anscount++]= (struct dundi_answer *)(data + 2);
|
|
else
|
|
errorf("Ignoring extra answers!\n");
|
|
}
|
|
break;
|
|
case DUNDI_IE_TTL:
|
|
if (len != (int)sizeof(unsigned short)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Expecting ttl to be %d bytes long but was %d\n", (int)sizeof(unsigned short), len);
|
|
errorf(tmp);
|
|
} else
|
|
ies->ttl = ntohs(*((unsigned short *)(data + 2)));
|
|
break;
|
|
case DUNDI_IE_VERSION:
|
|
if (len != (int)sizeof(unsigned short)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Expecting version to be %d bytes long but was %d\n", (int)sizeof(unsigned short), len);
|
|
errorf(tmp);
|
|
} else
|
|
ies->version = ntohs(*((unsigned short *)(data + 2)));
|
|
break;
|
|
case DUNDI_IE_EXPIRATION:
|
|
if (len != (int)sizeof(unsigned short)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Expecting expiration to be %d bytes long but was %d\n", (int)sizeof(unsigned short), len);
|
|
errorf(tmp);
|
|
} else
|
|
ies->expiration = ntohs(*((unsigned short *)(data + 2)));
|
|
break;
|
|
case DUNDI_IE_KEYCRC32:
|
|
if (len != (int)sizeof(unsigned int)) {
|
|
snprintf(tmp, (int)sizeof(tmp), "Expecting expiration to be %d bytes long but was %d\n", (int)sizeof(unsigned int), len);
|
|
errorf(tmp);
|
|
} else
|
|
ies->keycrc32 = ntohl(*((unsigned int *)(data + 2)));
|
|
break;
|
|
case DUNDI_IE_UNKNOWN:
|
|
if (len == 1)
|
|
ies->unknowncmd = data[2];
|
|
else {
|
|
snprintf(tmp, (int)sizeof(tmp), "Expected single byte Unknown command, but was %d long\n", len);
|
|
errorf(tmp);
|
|
}
|
|
break;
|
|
case DUNDI_IE_CAUSE:
|
|
if (len >= 1) {
|
|
ies->cause = data[2];
|
|
ies->causestr = (char *)data + 3;
|
|
} else {
|
|
snprintf(tmp, (int)sizeof(tmp), "Expected at least one byte cause, but was %d long\n", len);
|
|
errorf(tmp);
|
|
}
|
|
break;
|
|
case DUNDI_IE_HINT:
|
|
if (len >= 2) {
|
|
ies->hint = (struct dundi_hint *)(data + 2);
|
|
} else {
|
|
snprintf(tmp, (int)sizeof(tmp), "Expected at least two byte hint, but was %d long\n", len);
|
|
errorf(tmp);
|
|
}
|
|
break;
|
|
case DUNDI_IE_DEPARTMENT:
|
|
ies->q_dept = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_ORGANIZATION:
|
|
ies->q_org = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_LOCALITY:
|
|
ies->q_locality = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_STATE_PROV:
|
|
ies->q_stateprov = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_COUNTRY:
|
|
ies->q_country = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_EMAIL:
|
|
ies->q_email = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_PHONE:
|
|
ies->q_phone = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_IPADDR:
|
|
ies->q_ipaddr = (char *)data + 2;
|
|
break;
|
|
case DUNDI_IE_ENCDATA:
|
|
/* Recalculate len as the remainder of the message, regardless of
|
|
theoretical length */
|
|
len = datalen - 2;
|
|
if ((len > 16) && !(len % 16)) {
|
|
ies->encblock = (struct dundi_encblock *)(data + 2);
|
|
ies->enclen = len - 16;
|
|
} else {
|
|
snprintf(tmp, (int)sizeof(tmp), "Invalid encrypted data length %d\n", len);
|
|
errorf(tmp);
|
|
}
|
|
break;
|
|
case DUNDI_IE_SHAREDKEY:
|
|
if (len == 128) {
|
|
ies->encsharedkey = (unsigned char *)(data + 2);
|
|
} else {
|
|
snprintf(tmp, (int)sizeof(tmp), "Invalid encrypted shared key length %d\n", len);
|
|
errorf(tmp);
|
|
}
|
|
break;
|
|
case DUNDI_IE_SIGNATURE:
|
|
if (len == 128) {
|
|
ies->encsig = (unsigned char *)(data + 2);
|
|
} else {
|
|
snprintf(tmp, (int)sizeof(tmp), "Invalid encrypted signature length %d\n", len);
|
|
errorf(tmp);
|
|
}
|
|
break;
|
|
case DUNDI_IE_CACHEBYPASS:
|
|
ies->cbypass = 1;
|
|
break;
|
|
default:
|
|
snprintf(tmp, (int)sizeof(tmp), "Ignoring unknown information element '%s' (%d) of length %d\n", dundi_ie2str(ie), ie, len);
|
|
outputf(tmp);
|
|
}
|
|
/* Overwrite information element with 0, to null terminate previous portion */
|
|
data[0] = 0;
|
|
datalen -= (len + 2);
|
|
data += (len + 2);
|
|
}
|
|
/* Null-terminate last field */
|
|
*data = '\0';
|
|
if (datalen) {
|
|
errorf("Invalid information element contents, strange boundary\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|