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extensive ENUM support update, including ENUMLOOKUP() dialplan function (issue #5201 with mods)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6579 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2005-09-14 01:36:15 +00:00
parent 72437b1dba
commit 0c8f0e8bdb
5 changed files with 715 additions and 66 deletions
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273
enum.c
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@@ -87,9 +87,12 @@ static int parse_ie(char *data, int maxdatalen, char *src, int srclen)
/*--- parse_naptr: Parse DNS NAPTR record used in ENUM ---*/
static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *answer, int len, char *naptrinput)
{
char tech_return[80];
char *oanswer = answer;
char flags[512] = "";
char services[512] = "";
unsigned char *p;
char regexp[512] = "";
char repl[512] = "";
char temp[512] = "";
@@ -102,9 +105,10 @@ static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *a
regex_t preg;
regmatch_t pmatch[9];
tech_return[0] = '\0';
dst[0] = '\0';
if (len < sizeof(struct naptr)) {
ast_log(LOG_WARNING, "NAPTR record length too short\n");
return -1;
@@ -113,29 +117,30 @@ static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *a
len -= sizeof(struct naptr);
if ((res = parse_ie(flags, sizeof(flags) - 1, answer, len)) < 0) {
ast_log(LOG_WARNING, "Failed to get flags from NAPTR record\n");
return -1;
} else {
answer += res;
len -= res;
return -1;
} else {
answer += res;
len -= res;
}
if ((res = parse_ie(services, sizeof(services) - 1, answer, len)) < 0) {
ast_log(LOG_WARNING, "Failed to get services from NAPTR record\n");
return -1;
} else {
answer += res;
len -= res;
return -1;
} else {
answer += res;
len -= res;
}
if ((res = parse_ie(regexp, sizeof(regexp) - 1, answer, len)) < 0) {
ast_log(LOG_WARNING, "Failed to get regexp from NAPTR record\n");
return -1;
} else {
answer += res;
len -= res;
return -1;
} else {
answer += res;
len -= res;
}
if ((res = dn_expand((unsigned char *)oanswer, (unsigned char *)answer + len, (unsigned char *)answer, repl, sizeof(repl) - 1)) < 0) {
ast_log(LOG_WARNING, "Failed to expand hostname\n");
return -1;
}
}
if (option_debug > 2) /* Advanced NAPTR debugging */
ast_log(LOG_DEBUG, "NAPTR input='%s', flags='%s', services='%s', regexp='%s', repl='%s'\n",
@@ -146,29 +151,27 @@ static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *a
return -1;
}
if ((!strncasecmp(services, "e2u+sip", 7)) ||
(!strncasecmp(services, "sip+e2u", 7))) {
ast_copy_string(tech, "sip", techsize);
} else if ((!strncasecmp(services, "e2u+h323", 8)) ||
(!strncasecmp(services, "h323+e2u", 8))) {
ast_copy_string(tech, "h323", techsize);
} else if ((!strncasecmp(services, "e2u+x-iax2", 10)) ||
(!strncasecmp(services, "e2u+iax2", 8)) ||
(!strncasecmp(services, "iax2+e2u", 8))) {
ast_copy_string(tech, "iax2", techsize);
} else if ((!strncasecmp(services, "e2u+x-iax", 9)) ||
(!strncasecmp(services, "e2u+iax", 7)) ||
(!strncasecmp(services, "iax+e2u", 7))) {
ast_copy_string(tech, "iax", techsize);
} else if ((!strncasecmp(services, "e2u+tel", 7)) ||
(!strncasecmp(services, "tel+e2u", 7))) {
ast_copy_string(tech, "tel", techsize);
} else if (!strncasecmp(services, "e2u+voice:", 10)) {
ast_copy_string(tech, services+10, techsize);
p = strstr(services, "e2u+");
if(p == NULL)
p = strstr(services, "E2U+");
if(p){
p = p + 4;
if(strchr(p, ':')){
p = strchr(p, ':') + 1;
}
ast_copy_string(tech_return, p, sizeof(tech_return));
} else {
ast_log(LOG_DEBUG,
"Services must be e2u+${tech}, ${tech}+e2u, or e2u+voice: where $tech is from (sip, h323, tel, iax, iax2). \n");
return 0;
p = strstr(services, "+e2u");
if(p == NULL)
p = strstr(services, "+E2U");
if(p){
*p = 0;
p = strchr(services, ':');
if(p)
*p = 0;
ast_copy_string(tech_return, services, sizeof(tech_return));
}
}
/* DEDBUGGING STUB
@@ -179,7 +182,7 @@ static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *a
if (regexp_len < 7) {
ast_log(LOG_WARNING, "Regex too short to be meaningful.\n");
return -1;
}
}
delim = regexp[0];
@@ -197,6 +200,7 @@ static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *a
#if 0
printf("Pattern: %s\n", pattern);
printf("Subst: %s\n", subst);
printf("Input: %s\n", naptrinput);
#endif
/*
@@ -221,8 +225,8 @@ static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *a
}
regfree(&preg);
d = temp;
d_len--;
d = temp;
d_len--;
while( *subst && (d_len > 0) ) {
if ((subst[0] == '\\') && isdigit(subst[1]) && (pmatch[subst[1]-'0'].rm_so != -1)) {
backref = subst[1]-'0';
@@ -246,9 +250,35 @@ static int parse_naptr(char *dst, int dstsize, char *tech, int techsize, char *a
*d = 0;
ast_copy_string(dst, temp, dstsize);
dst[dstsize - 1] = '\0';
return 0;
if(*tech != '\0'){ /* check if it is requested NAPTR */
if(!strncasecmp(tech, "ALL", techsize)){
return 1; /* return or count any RR */
}
if(!strncasecmp(tech_return, tech, sizeof(tech_return)<techsize?sizeof(tech_return):techsize)){
ast_copy_string(tech, tech_return, techsize);
return 1; /* we got out RR */
} else { /* go to the next RR in the DNS answer */
return 0;
}
}
/* tech was not specified, return first parsed RR */
ast_copy_string(tech, tech_return, techsize);
return 1;
}
/* do not return requested value, just count RRs and return thei number in dst */
#define ENUMLOOKUP_OPTIONS_COUNT 1
struct enum_naptr_rr {
struct naptr naptr; /* order and preference of RR */
char *result; /* result of naptr parsing,e.g.: tel:+5553 */
char *tech; /* Technology (from URL scheme) */
int sort_pos; /* sort position */
};
struct enum_context {
char *dst; /* Destination part of URL from ENUM */
int dstlen; /* Length */
@@ -257,6 +287,10 @@ struct enum_context {
char *txt; /* TXT record in TXT lookup */
int txtlen; /* Length */
char *naptrinput; /* The number to lookup */
int position; /* used as counter for RRs or specifies position of required RR */
int options; /* options , see ENUMLOOKUP_OPTIONS_* defined above */
struct enum_naptr_rr *naptr_rrs; /* array of parsed NAPTR RRs */
int naptr_rrs_count; /* Size of array naptr_rrs */
};
/*--- txt_callback: Callback for TXT record lookup */
@@ -278,7 +312,7 @@ static int txt_callback(void *context, char *answer, int len, char *fullanswer)
len -= 1;
/* answer is not null-terminated, but should be */
/* this is safe to do, as answer has extra bytes on the end we can
/* this is safe to do, as answer has extra bytes on the end we can
safely overwrite with a null */
answer[len] = '\0';
/* now increment len so that len includes the null, so that we can
@@ -287,7 +321,7 @@ static int txt_callback(void *context, char *answer, int len, char *fullanswer)
/* finally, copy the answer into c->txt */
ast_copy_string(c->txt, answer, len < c->txtlen ? len : (c->txtlen));
/* just to be safe, let's make sure c->txt is null terminated */
c->txt[(c->txtlen)-1] = '\0';
@@ -298,45 +332,122 @@ static int txt_callback(void *context, char *answer, int len, char *fullanswer)
static int enum_callback(void *context, char *answer, int len, char *fullanswer)
{
struct enum_context *c = (struct enum_context *)context;
void *p = NULL;
int res;
if (parse_naptr(c->dst, c->dstlen, c->tech, c->techlen, answer, len, c->naptrinput)) {
res = parse_naptr(c->dst, c->dstlen, c->tech, c->techlen, answer, len, c->naptrinput);
if(res < 0){
ast_log(LOG_WARNING, "Failed to parse naptr :(\n");
return -1;
} else if(res > 0 && !ast_strlen_zero(c->dst)){ /* ok, we got needed NAPTR */
if(c->options & ENUMLOOKUP_OPTIONS_COUNT){ /* counting RRs */
c->position++;
snprintf(c->dst, c->dstlen, "%d", c->position);
} else {
p = realloc(c->naptr_rrs, sizeof(struct enum_naptr_rr)*(c->naptr_rrs_count+1));
if(p){
c->naptr_rrs = (struct enum_naptr_rr*)p;
memcpy(&c->naptr_rrs[c->naptr_rrs_count].naptr, answer, sizeof(struct naptr));
/* printf("order=%d, pref=%d\n", ntohs(c->naptr_rrs[c->naptr_rrs_count].naptr.order), ntohs(c->naptr_rrs[c->naptr_rrs_count].naptr.pref)); */
c->naptr_rrs[c->naptr_rrs_count].result = strdup(c->dst);
c->naptr_rrs[c->naptr_rrs_count].tech = strdup(c->tech);
c->naptr_rrs[c->naptr_rrs_count].sort_pos = c->naptr_rrs_count;
c->naptr_rrs_count++;
}
c->dst[0] = 0;
}
return 0;
}
if (!ast_strlen_zero(c->dst))
return 1;
if(c->options & ENUMLOOKUP_OPTIONS_COUNT){ /* counting RRs */
snprintf(c->dst, c->dstlen, "%d", c->position);
}
return 0;
}
/*--- ast_get_enum: ENUM lookup */
int ast_get_enum(struct ast_channel *chan, const char *number, char *dst, int dstlen, char *tech, int techlen)
int ast_get_enum(struct ast_channel *chan, const char *number, char *dst, int dstlen, char *tech, int techlen, char* suffix, char* options)
{
struct enum_context context;
char tmp[259 + 512];
char naptrinput[512] = "+";
char naptrinput[512];
int pos = strlen(number) - 1;
int newpos = 0;
int ret = -1;
struct enum_search *s = NULL;
int version = -1;
/* for ISN rewrite */
char *p1 = NULL;
char *p2 = NULL;
int k = 0;
int i = 0;
int z = 0;
strncat(naptrinput, number, sizeof(naptrinput) - 2);
if(number[0] == 'n'){
strncpy(naptrinput, number+1, sizeof(naptrinput));
} else {
strncpy(naptrinput, number, sizeof(naptrinput));
}
context.naptrinput = naptrinput; /* The number */
context.dst = dst; /* Return string */
context.dstlen = dstlen;
context.tech = tech; /* Return string */
context.tech = tech;
context.techlen = techlen;
context.options = 0;
context.position = 1;
context.naptr_rrs = NULL;
context.naptr_rrs_count = 0;
if(options != NULL){
if(*options == 'c'){
context.options = ENUMLOOKUP_OPTIONS_COUNT;
context.position = 0;
} else {
context.position = atoi(options);
if(context.position < 1)
context.position = 1;
}
}
if (pos > 128)
pos = 128;
while(pos >= 0) {
tmp[newpos++] = number[pos--];
tmp[newpos++] = '.';
/* ISN rewrite */
p1 = strchr(number, '*');
if(number[0] == 'n'){ /* do not perform ISN rewrite ('n' is testing flag) */
p1 = NULL;
k = 1; /* strip 'n' from number */
}
if(p1 != NULL){
p2 = p1+1;
while(p1 > number){
p1--;
tmp[newpos++] = *p1;
tmp[newpos++] = '.';
}
if(*p2){
while(*p2 && newpos < 128){
tmp[newpos++] = *p2;
p2++;
}
tmp[newpos++] = '.';
}
} else {
while(pos >= k) {
if(isdigit(number[pos])){
tmp[newpos++] = number[pos];
tmp[newpos++] = '.';
}
pos--;
}
}
if (chan && ast_autoservice_start(chan) < 0)
return -1;
@@ -349,7 +460,9 @@ int ast_get_enum(struct ast_channel *chan, const char *number, char *dst, int ds
} else {
s = s->next;
}
if (s) {
if(suffix != NULL){
strncpy(tmp + newpos, suffix, sizeof(tmp) - newpos - 1);
} else if (s) {
strncpy(tmp + newpos, s->toplev, sizeof(tmp) - newpos - 1);
}
ast_mutex_unlock(&enumlock);
@@ -358,17 +471,65 @@ int ast_get_enum(struct ast_channel *chan, const char *number, char *dst, int ds
ret = ast_search_dns(&context, tmp, C_IN, T_NAPTR, enum_callback);
if (ret > 0)
break;
if(suffix != NULL)
break;
}
if (ret < 0) {
ast_log(LOG_DEBUG, "No such number found: %s (%s)\n", tmp, strerror(errno));
ret = 0;
}
if(context.naptr_rrs_count >= context.position && ! (context.options & ENUMLOOKUP_OPTIONS_COUNT)){
/* sort array by NAPTR order/preference */
for(k=0; k<context.naptr_rrs_count; k++){
for(i=0; i<context.naptr_rrs_count; i++){
/* use order first and then preference to compare */
if((ntohs(context.naptr_rrs[k].naptr.order) < ntohs(context.naptr_rrs[i].naptr.order)
&& context.naptr_rrs[k].sort_pos > context.naptr_rrs[i].sort_pos)
|| (ntohs(context.naptr_rrs[k].naptr.order) > ntohs(context.naptr_rrs[i].naptr.order)
&& context.naptr_rrs[k].sort_pos < context.naptr_rrs[i].sort_pos)){
z = context.naptr_rrs[k].sort_pos;
context.naptr_rrs[k].sort_pos = context.naptr_rrs[i].sort_pos;
context.naptr_rrs[i].sort_pos = z;
continue;
}
if(ntohs(context.naptr_rrs[k].naptr.order) == ntohs(context.naptr_rrs[i].naptr.order)){
if((ntohs(context.naptr_rrs[k].naptr.pref) < ntohs(context.naptr_rrs[i].naptr.pref)
&& context.naptr_rrs[k].sort_pos > context.naptr_rrs[i].sort_pos)
|| (ntohs(context.naptr_rrs[k].naptr.pref) > ntohs(context.naptr_rrs[i].naptr.pref)
&& context.naptr_rrs[k].sort_pos < context.naptr_rrs[i].sort_pos)){
z = context.naptr_rrs[k].sort_pos;
context.naptr_rrs[k].sort_pos = context.naptr_rrs[i].sort_pos;
context.naptr_rrs[i].sort_pos = z;
}
}
}
}
for(k=0; k<context.naptr_rrs_count; k++){
if(context.naptr_rrs[k].sort_pos == context.position-1){
ast_copy_string(context.dst, context.naptr_rrs[k].result, dstlen);
ast_copy_string(context.tech, context.naptr_rrs[k].tech, techlen);
break;
}
}
} else if( !(context.options & ENUMLOOKUP_OPTIONS_COUNT) ) {
context.dst[0] = 0;
}
if (chan)
ret |= ast_autoservice_stop(chan);
for(k=0; k<context.naptr_rrs_count; k++){
free(context.naptr_rrs[k].result);
free(context.naptr_rrs[k].tech);
}
free(context.naptr_rrs);
return ret;
}
/*--- ast_get_txt: Get TXT record from DNS.
/*--- ast_get_txt: Get TXT record from DNS.
Really has nothing to do with enum, but anyway...
*/
int ast_get_txt(struct ast_channel *chan, const char *number, char *dst, int dstlen, char *tech, int techlen, char *txt, int txtlen)
@@ -398,7 +559,7 @@ int ast_get_txt(struct ast_channel *chan, const char *number, char *dst, int dst
tmp[newpos++] = number[pos--];
tmp[newpos++] = '.';
}
if (chan && ast_autoservice_start(chan) < 0)
return -1;