aboutsummaryrefslogtreecommitdiffstats
path: root/pbx/dundi-parser.c
diff options
context:
space:
mode:
Diffstat (limited to 'pbx/dundi-parser.c')
-rw-r--r--pbx/dundi-parser.c831
1 files changed, 831 insertions, 0 deletions
diff --git a/pbx/dundi-parser.c b/pbx/dundi-parser.c
new file mode 100644
index 000000000..14ef9e740
--- /dev/null
+++ b/pbx/dundi-parser.c
@@ -0,0 +1,831 @@
+/*
+ * 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)
+ *
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "asterisk/frame.h"
+#include "asterisk/utils.h"
+#include "asterisk/dundi.h"
+#include "dundi-parser.h"
+#include "asterisk/dundi.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(char *s, int maxlen, dundi_eid *eid)
+{
+ int x;
+ char *os = s;
+ if (maxlen < 18) {
+ if (s && (maxlen > 0))
+ *s = '\0';
+ } else {
+ for (x=0;x<5;x++) {
+ sprintf(s, "%02x:", eid->eid[x]);
+ s += 3;
+ }
+ sprintf(s, "%02x", eid->eid[5]);
+ }
+ return os;
+}
+
+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, "%02X", eid->eid[x]);
+ s += 2;
+ }
+ }
+ return os;
+}
+
+int dundi_str_to_eid(dundi_eid *eid, char *s)
+{
+ unsigned int eid_int[6];
+ int x;
+ if (sscanf(s, "%x:%x:%x:%x:%x:%x", &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_str_short_to_eid(dundi_eid *eid, 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<sizeof(eid->eid) / sizeof(eid->eid[0]);x++)
+ if (eid->eid[x]) return 0;
+ return 1;
+}
+
+int dundi_eid_cmp(dundi_eid *eid1, dundi_eid *eid2)
+{
+ return memcmp(eid1, eid2, sizeof(dundi_eid));
+}
+
+static void dump_string(char *output, int maxlen, void *value, int len)
+{
+ maxlen--;
+ if (maxlen > len)
+ maxlen = len;
+ strncpy(output, value, maxlen);
+ output[maxlen] = '\0';
+}
+
+static void dump_cbypass(char *output, int maxlen, void *value, int len)
+{
+ maxlen--;
+ strncpy(output, "Bypass Caches", maxlen);
+ output[maxlen] = '\0';
+}
+
+static void dump_eid(char *output, int maxlen, void *value, int len)
+{
+ if (len == 6)
+ dundi_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)
+{
+ unsigned short flags;
+ char tmp[512];
+ char tmp2[256];
+ if (len < 2) {
+ strncpy(output, "<invalid contents>", maxlen);
+ return;
+ }
+ memcpy(&flags, value, sizeof(flags));
+ flags = ntohs(flags);
+ memset(tmp, 0, sizeof(tmp));
+ dundi_hint2str(tmp2, sizeof(tmp2), flags);
+ snprintf(tmp, sizeof(tmp), "[%s] ", tmp2);
+ memcpy(tmp + strlen(tmp), value + 2, len - 2);
+ strncpy(output, tmp, maxlen - 1);
+}
+
+static void dump_cause(char *output, int maxlen, void *value, int len)
+{
+ static char *causes[] = {
+ "SUCCESS",
+ "GENERAL",
+ "DYNAMIC",
+ "NOAUTH" ,
+ };
+ char tmp[256];
+ char tmp2[256];
+ int mlen;
+ unsigned char cause;
+ if (len < 1) {
+ strncpy(output, "<invalid contents>", maxlen);
+ return;
+ }
+ cause = *((unsigned char *)value);
+ memset(tmp2, 0, sizeof(tmp2));
+ mlen = len - 1;
+ if (mlen > 255)
+ mlen = 255;
+ memcpy(tmp2, value + 1, mlen);
+ if (cause < sizeof(causes) / sizeof(causes[0])) {
+ if (len > 1)
+ snprintf(tmp, sizeof(tmp), "%s: %s", causes[cause], tmp2);
+ else
+ snprintf(tmp, sizeof(tmp), "%s", causes[cause]);
+ } else {
+ if (len > 1)
+ snprintf(tmp, sizeof(tmp), "%d: %s", cause, tmp2);
+ else
+ snprintf(tmp, sizeof(tmp), "%d", cause);
+ }
+
+ strncpy(output,tmp, maxlen);
+ output[maxlen] = '\0';
+}
+
+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
+ snprintf(output, maxlen, "Invalid INT");
+}
+
+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
+ snprintf(output, maxlen, "Invalid SHORT");
+}
+
+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
+ snprintf(output, maxlen, "Invalid BYTE");
+}
+
+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]="";
+ if (len >= 10) {
+ answer = (struct dundi_answer *)(value);
+ memcpy(tmp, answer->data, (len >= 500) ? 500 : len - 10);
+ dundi_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);
+ } else
+ strncpy(output, "Invalid Answer", maxlen - 1);
+}
+
+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, "%02x", ((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, "%02x ", 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);
+} ies[] = {
+ { 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<(int)sizeof(ies) / (int)sizeof(ies[0]); x++) {
+ if (ies[x].ie == ie)
+ return ies[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[1024];
+ 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<(int)sizeof(ies) / (int)sizeof(ies[0]); x++) {
+ if (ies[x].ie == ie) {
+ if (ies[x].dump) {
+ ies[x].dump(interp, (int)sizeof(interp), iedata + 2, ielen);
+ snprintf(tmp, (int)sizeof(tmp), " %s%-15.15s : %s\n", (spaces ? " " : "" ), ies[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 ? " " : "" ), ies[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 sockaddr_in *sin, int datalen)
+{
+ char *pref[] = {
+ "Tx",
+ "Rx",
+ " ETx",
+ " Erx" };
+ char *commands[] = {
+ "ACK ",
+ "DPDISCOVER ",
+ "DPRESPONSE ",
+ "EIDQUERY ",
+ "EIDRESPONSE ",
+ "PRECACHERQ ",
+ "PRECACHERP ",
+ "INVALID ",
+ "UNKNOWN CMD ",
+ "NULL ",
+ "REQREQ ",
+ "REGRESPONSE ",
+ "CANCEL ",
+ "ENCRYPT ",
+ "ENCREJ " };
+ char class2[20];
+ char *class;
+ char subclass2[20];
+ char *subclass;
+ char tmp[256];
+ char retries[20];
+ if (ntohs(fhi->dtrans) & DUNDI_FLAG_RETRANS)
+ strcpy(retries, "Yes");
+ else
+ strcpy(retries, "No");
+ if ((ntohs(fhi->strans) & DUNDI_FLAG_RESERVED)) {
+ /* Ignore frames with high bit set to 1 */
+ return;
+ }
+ if ((fhi->cmdresp & 0x3f) > (int)sizeof(commands)/(int)sizeof(char *)) {
+ snprintf(class2, (int)sizeof(class2), "(%d?)", fhi->cmdresp);
+ class = class2;
+ } else {
+ class = commands[(int)(fhi->cmdresp & 0x3f)];
+ }
+ snprintf(subclass2, (int)sizeof(subclass2), "%02x", fhi->cmdflags);
+ subclass = subclass2;
+ snprintf(tmp, (int)sizeof(tmp),
+ "%s-Frame Retry[%s] -- OSeqno: %3.3d ISeqno: %3.3d Type: %s (%s)\n",
+ pref[rx],
+ retries, 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:%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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 00:07:31 +0000