asterisk/pbx/dundi-parser.c

813 lines
22 KiB
C

/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Distributed Universal Number Discovery (DUNDi)
*
*/
/*** MODULEINFO
<support_level>extended</support_level>
***/
#include "asterisk.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "asterisk/frame.h"
#include "asterisk/utils.h"
#include "asterisk/dundi.h"
#include "dundi-parser.h"
static void internaloutput(const char *str)
{
fputs(str, stdout);
}
static void internalerror(const char *str)
{
fprintf(stderr, "WARNING: %s", str);
}
static void (*outputf)(const char *str) = internaloutput;
static void (*errorf)(const char *str) = internalerror;
char *dundi_eid_to_str_short(char *s, int maxlen, dundi_eid *eid)
{
int x;
char *os = s;
if (maxlen < 13) {
if (s && (maxlen > 0))
*s = '\0';
} else {
for (x=0;x<6;x++) {
sprintf(s, "%02hhX", (unsigned char)eid->eid[x]);
s += 2;
}
}
return os;
}
int dundi_str_short_to_eid(dundi_eid *eid, const char *s)
{
unsigned int eid_int[6];
int x;
if (sscanf(s, "%2x%2x%2x%2x%2x%2x", &eid_int[0], &eid_int[1], &eid_int[2],
&eid_int[3], &eid_int[4], &eid_int[5]) != 6)
return -1;
for (x = 0; x < 6; x++)
eid->eid[x] = eid_int[x];
return 0;
}
int dundi_eid_zero(dundi_eid *eid)
{
int x;
for (x = 0; x < ARRAY_LEN(eid->eid); x++)
if (eid->eid[x]) return 0;
return 1;
}
static void dump_string(char *output, int maxlen, void *value, int len)
{
if (maxlen > len + 1)
maxlen = len + 1;
snprintf(output, maxlen, "%s", (char *) value);
}
static void dump_cbypass(char *output, int maxlen, void *value, int len)
{
snprintf(output, maxlen, "Bypass Caches");
}
static void dump_eid(char *output, int maxlen, void *value, int len)
{
if (len == 6)
ast_eid_to_str(output, maxlen, (dundi_eid *)value);
else
snprintf(output, maxlen, "Invalid EID len %d", len);
}
char *dundi_hint2str(char *buf, int bufsiz, int flags)
{
strcpy(buf, "");
buf[bufsiz-1] = '\0';
if (flags & DUNDI_HINT_TTL_EXPIRED) {
strncat(buf, "TTLEXPIRED|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_HINT_DONT_ASK) {
strncat(buf, "DONTASK|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_HINT_UNAFFECTED) {
strncat(buf, "UNAFFECTED|", bufsiz - strlen(buf) - 1);
}
/* Get rid of trailing | */
if (ast_strlen_zero(buf))
strcpy(buf, "NONE|");
buf[strlen(buf)-1] = '\0';
return buf;
}
static void dump_hint(char *output, int maxlen, void *value, int len)
{
char tmp2[256];
char tmp3[256];
int datalen;
struct dundi_hint *hint;
if (len < sizeof(*hint)) {
snprintf(output, maxlen, "<invalid contents>");
return;
}
hint = (struct dundi_hint *) value;;
datalen = len - offsetof(struct dundi_hint, data);
if (datalen > sizeof(tmp3) - 1)
datalen = sizeof(tmp3) - 1;
memcpy(tmp3, hint->data, datalen);
tmp3[datalen] = '\0';
dundi_hint2str(tmp2, sizeof(tmp2), ntohs(hint->flags));
if (ast_strlen_zero(tmp3))
snprintf(output, maxlen, "[%s]", tmp2);
else
snprintf(output, maxlen, "[%s] %s", tmp2, tmp3);
}
static void dump_cause(char *output, int maxlen, void *value, int len)
{
static const char * const causes[] = {
"SUCCESS",
"GENERAL",
"DYNAMIC",
"NOAUTH" ,
};
char tmp2[256];
struct dundi_cause *cause;
int datalen;
int causecode;
if (len < sizeof(*cause)) {
snprintf(output, maxlen, "<invalid contents>");
return;
}
cause = (struct dundi_cause*) value;
causecode = cause->causecode;
datalen = len - offsetof(struct dundi_cause, desc);
if (datalen > sizeof(tmp2) - 1)
datalen = sizeof(tmp2) - 1;
memcpy(tmp2, cause->desc, datalen);
tmp2[datalen] = '\0';
if (causecode < ARRAY_LEN(causes)) {
if (ast_strlen_zero(tmp2))
snprintf(output, maxlen, "%s", causes[causecode]);
else
snprintf(output, maxlen, "%s: %s", causes[causecode], tmp2);
} else {
if (ast_strlen_zero(tmp2))
snprintf(output, maxlen, "%d", causecode);
else
snprintf(output, maxlen, "%d: %s", causecode, tmp2);
}
}
static void dump_int(char *output, int maxlen, void *value, int len)
{
if (len == (int)sizeof(unsigned int))
snprintf(output, maxlen, "%lu", (unsigned long)ntohl(*((unsigned int *)value)));
else
ast_copy_string(output, "Invalid INT", maxlen);
}
static void dump_short(char *output, int maxlen, void *value, int len)
{
if (len == (int)sizeof(unsigned short))
snprintf(output, maxlen, "%d", ntohs(*((unsigned short *)value)));
else
ast_copy_string(output, "Invalid SHORT", maxlen);
}
static void dump_byte(char *output, int maxlen, void *value, int len)
{
if (len == (int)sizeof(unsigned char))
snprintf(output, maxlen, "%d", *((unsigned char *)value));
else
ast_copy_string(output, "Invalid BYTE", maxlen);
}
static char *proto2str(int proto, char *buf, int bufsiz)
{
switch(proto) {
case DUNDI_PROTO_NONE:
strncpy(buf, "None", bufsiz - 1);
break;
case DUNDI_PROTO_IAX:
strncpy(buf, "IAX", bufsiz - 1);
break;
case DUNDI_PROTO_SIP:
strncpy(buf, "SIP", bufsiz - 1);
break;
case DUNDI_PROTO_H323:
strncpy(buf, "H.323", bufsiz - 1);
break;
default:
snprintf(buf, bufsiz, "Unknown Proto(%d)", proto);
}
buf[bufsiz-1] = '\0';
return buf;
}
char *dundi_flags2str(char *buf, int bufsiz, int flags)
{
strcpy(buf, "");
buf[bufsiz-1] = '\0';
if (flags & DUNDI_FLAG_EXISTS) {
strncat(buf, "EXISTS|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_MATCHMORE) {
strncat(buf, "MATCHMORE|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_CANMATCH) {
strncat(buf, "CANMATCH|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_IGNOREPAT) {
strncat(buf, "IGNOREPAT|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_RESIDENTIAL) {
strncat(buf, "RESIDENCE|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_COMMERCIAL) {
strncat(buf, "COMMERCIAL|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_MOBILE) {
strncat(buf, "MOBILE", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_NOUNSOLICITED) {
strncat(buf, "NOUNSLCTD|", bufsiz - strlen(buf) - 1);
}
if (flags & DUNDI_FLAG_NOCOMUNSOLICIT) {
strncat(buf, "NOCOMUNSLTD|", bufsiz - strlen(buf) - 1);
}
/* Get rid of trailing | */
if (ast_strlen_zero(buf))
strcpy(buf, "NONE|");
buf[strlen(buf)-1] = '\0';
return buf;
}
static void dump_answer(char *output, int maxlen, void *value, int len)
{
struct dundi_answer *answer;
char proto[40];
char flags[40];
char eid_str[40];
char tmp[512]="";
int datalen;
if (len < sizeof(*answer)) {
snprintf(output, maxlen, "Invalid Answer");
return;
}
answer = (struct dundi_answer *)(value);
datalen = len - offsetof(struct dundi_answer, data);
if (datalen > sizeof(tmp) - 1)
datalen = sizeof(tmp) - 1;
memcpy(tmp, answer->data, datalen);
tmp[datalen] = '\0';
ast_eid_to_str(eid_str, sizeof(eid_str), &answer->eid);
snprintf(output, maxlen, "[%s] %d <%s/%s> from [%s]",
dundi_flags2str(flags, sizeof(flags), ntohs(answer->flags)),
ntohs(answer->weight),
proto2str(answer->protocol, proto, sizeof(proto)),
tmp, eid_str);
}
static void dump_encrypted(char *output, int maxlen, void *value, int len)
{
char iv[33];
int x;
if ((len > 16) && !(len % 16)) {
/* Build up IV */
for (x=0;x<16;x++) {
snprintf(iv + (x << 1), 3, "%02hhx", ((unsigned char *)value)[x]);
}
snprintf(output, maxlen, "[IV %s] %d encrypted blocks\n", iv, len / 16);
} else
snprintf(output, maxlen, "Invalid Encrypted Datalen %d", len);
}
static void dump_raw(char *output, int maxlen, void *value, int len)
{
int x;
unsigned char *u = value;
output[maxlen - 1] = '\0';
strcpy(output, "[ ");
for (x=0;x<len;x++) {
snprintf(output + strlen(output), maxlen - strlen(output) - 1, "%02hhx ", u[x]);
}
strncat(output + strlen(output), "]", maxlen - strlen(output) - 1);
}
static struct dundi_ie {
int ie;
char *name;
void (*dump)(char *output, int maxlen, void *value, int len);
} infoelts[] = {
{ DUNDI_IE_EID, "ENTITY IDENT", dump_eid },
{ DUNDI_IE_CALLED_CONTEXT, "CALLED CONTEXT", dump_string },
{ DUNDI_IE_CALLED_NUMBER, "CALLED NUMBER", dump_string },
{ DUNDI_IE_EID_DIRECT, "DIRECT EID", dump_eid },
{ DUNDI_IE_ANSWER, "ANSWER", dump_answer },
{ DUNDI_IE_TTL, "TTL", dump_short },
{ DUNDI_IE_VERSION, "VERSION", dump_short },
{ DUNDI_IE_EXPIRATION, "EXPIRATION", dump_short },
{ DUNDI_IE_UNKNOWN, "UKWN DUNDI CMD", dump_byte },
{ DUNDI_IE_CAUSE, "CAUSE", dump_cause },
{ DUNDI_IE_REQEID, "REQUEST EID", dump_eid },
{ DUNDI_IE_ENCDATA, "ENCDATA", dump_encrypted },
{ DUNDI_IE_SHAREDKEY, "SHAREDKEY", dump_raw },
{ DUNDI_IE_SIGNATURE, "SIGNATURE", dump_raw },
{ DUNDI_IE_KEYCRC32, "KEYCRC32", dump_int },
{ DUNDI_IE_HINT, "HINT", dump_hint },
{ DUNDI_IE_DEPARTMENT, "DEPARTMENT", dump_string },
{ DUNDI_IE_ORGANIZATION, "ORGANIZTN", dump_string },
{ DUNDI_IE_LOCALITY, "LOCALITY", dump_string },
{ DUNDI_IE_STATE_PROV, "STATEPROV", dump_string },
{ DUNDI_IE_COUNTRY, "COUNTRY", dump_string },
{ DUNDI_IE_EMAIL, "EMAIL", dump_string },
{ DUNDI_IE_PHONE, "PHONE", dump_string },
{ DUNDI_IE_IPADDR, "ADDRESS", dump_string },
{ DUNDI_IE_CACHEBYPASS, "CBYPASS", dump_cbypass },
};
const char *dundi_ie2str(int ie)
{
int x;
for (x = 0; x < ARRAY_LEN(infoelts); x++) {
if (infoelts[x].ie == ie)
return infoelts[x].name;
}
return "Unknown IE";
}
static void dump_ies(unsigned char *iedata, int spaces, int len)
{
int ielen;
int ie;
int x;
int found;
char interp[1024];
char tmp[1051];
if (len < 2)
return;
while(len >= 2) {
ie = iedata[0];
ielen = iedata[1];
/* Encrypted data is the remainder */
if (ie == DUNDI_IE_ENCDATA)
ielen = len - 2;
if (ielen + 2> len) {
snprintf(tmp, (int)sizeof(tmp), "Total IE length of %d bytes exceeds remaining frame length of %d bytes\n", ielen + 2, len);
outputf(tmp);
return;
}
found = 0;
for (x = 0; x < ARRAY_LEN(infoelts); x++) {
if (infoelts[x].ie == ie) {
if (infoelts[x].dump) {
infoelts[x].dump(interp, (int)sizeof(interp), iedata + 2, ielen);
snprintf(tmp, (int)sizeof(tmp), " %s%-15.15s : %s\n", (spaces ? " " : "" ), infoelts[x].name, interp);
outputf(tmp);
} else {
if (ielen)
snprintf(interp, (int)sizeof(interp), "%d bytes", ielen);
else
strcpy(interp, "Present");
snprintf(tmp, (int)sizeof(tmp), " %s%-15.15s : %s\n", (spaces ? " " : "" ), infoelts[x].name, interp);
outputf(tmp);
}
found++;
}
}
if (!found) {
snprintf(tmp, (int)sizeof(tmp), " %sUnknown IE %03d : Present\n", (spaces ? " " : "" ), ie);
outputf(tmp);
}
iedata += (2 + ielen);
len -= (2 + ielen);
}
outputf("\n");
}
void dundi_showframe(struct dundi_hdr *fhi, int rx, struct ast_sockaddr *sin, int datalen)
{
char *pref[] = {
"Tx",
"Rx",
" ETx",
" Erx" };
char *commands[] = {
"ACK ",
"DPDISCOVER ",
"DPRESPONSE ",
"EIDQUERY ",
"EIDRESPONSE ",
"PRECACHERQ ",
"PRECACHERP ",
"INVALID ",
"UNKNOWN CMD ",
"NULL ",
"REGREQ ",
"REGRESPONSE ",
"CANCEL ",
"ENCRYPT ",
"ENCREJ " };
char class2[20];
char *class;
char subclass2[20];
char *subclass;
char tmp[256];
if ((fhi->cmdresp & 0x3f) >= ARRAY_LEN(commands)) {
snprintf(class2, sizeof(class2), "(%d?)", fhi->cmdresp & 0x3f);
class = class2;
} else {
class = commands[fhi->cmdresp & 0x3f];
}
snprintf(subclass2, sizeof(subclass2), "%02hhx", (unsigned char)fhi->cmdflags);
subclass = subclass2;
snprintf(tmp, sizeof(tmp),
"%s-Frame -- OSeqno: %3.3d ISeqno: %3.3d Type: %s (%s)\n",
pref[rx],
fhi->oseqno, fhi->iseqno, class, fhi->cmdresp & 0x40 ? "Response" : "Command");
outputf(tmp);
snprintf(tmp, (int)sizeof(tmp),
"%s Flags: %s STrans: %5.5d DTrans: %5.5d [%s]%s\n", (rx > 1) ? " " : "",
subclass, ntohs(fhi->strans) & ~DUNDI_FLAG_RESERVED, ntohs(fhi->dtrans) & ~DUNDI_FLAG_RETRANS,
ast_sockaddr_stringify(sin),
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;
if (data) {
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;
if (data) {
memcpy(ied->buf + ied->pos, data, datalen-2);
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;
}