int
osip_message_set_multiple_header(osip_message_t * sip, char *hname, char *hvalue)
{
int i;
char *ptr; /* current location of the search */
char *comma; /* This is the separator we are elooking for */
char *beg; /* beg of a header */
char *end; /* end of a header */
char *quote1; /* first quote of a pair of quotes */
char *quote2; /* second quuote of a pair of quotes */
size_t hname_len;
/* Find header based upon lowercase comparison */
osip_tolower(hname);
if (hvalue == NULL) {
i = osip_message_set__header(sip, hname, hvalue);
if (i != 0)
return i;
return OSIP_SUCCESS;
}
ptr = hvalue;
comma = strchr(ptr, ',');
hname_len = strlen(hname);
if (comma == NULL || (hname_len == 4 && strncmp(hname, "date", 4) == 0)
|| (hname_len == 2 && strncmp(hname, "to", 2) == 0)
|| (hname_len == 4 && strncmp(hname, "from", 4) == 0)
|| (hname_len == 7 && strncmp(hname, "call-id", 7) == 0)
|| (hname_len == 4 && strncmp(hname, "cseq", 4) == 0)
|| (hname_len == 7 && strncmp(hname, "subject", 7) == 0)
|| (hname_len == 7 && strncmp(hname, "expires", 7) == 0)
|| (hname_len == 6 && strncmp(hname, "server", 6) == 0)
|| (hname_len == 10 && strncmp(hname, "user-agent", 10) == 0)
|| (hname_len == 16 && strncmp(hname, "www-authenticate", 16) == 0)
|| (hname_len == 19 && strncmp(hname, "authentication-info", 19) == 0)
|| (hname_len == 18 && strncmp(hname, "proxy-authenticate", 18) == 0)
|| (hname_len == 19 && strncmp(hname, "proxy-authorization", 19) == 0)
|| (hname_len == 25
&& strncmp(hname, "proxy-authentication-info", 25) == 0)
|| (hname_len == 12 && strncmp(hname, "organization", 12) == 0)
|| (hname_len == 13 && strncmp(hname, "authorization", 13) == 0))
/* there is no multiple header! likely */
/* to happen most of the time... */
/* or hname is a TEXT-UTF8-TRIM and may */
/* contain a comma. this is not a separator */
/* THIS DOES NOT WORK FOR UNKNOWN HEADER!!!! */
{
i = osip_message_set__header(sip, hname, hvalue);
if (i != 0)
return i;
return OSIP_SUCCESS;
}
beg = hvalue;
end = NULL;
quote2 = NULL;
while (comma != NULL) {
quote1 = __osip_quote_find(ptr);
if (quote1 != NULL) {
quote2 = __osip_quote_find(quote1 + 1);
if (quote2 == NULL)
return OSIP_SYNTAXERROR; /* quotes comes by pair */
ptr = quote2 + 1;
}
if ((quote1 == NULL) || (quote1 > comma)) {
/* We must search for the next comma which is not
within quotes! */
end = comma;
if (quote1 != NULL && quote1 > comma) {
/* comma may be within the quotes */
/* ,<sip:[email protected]>;methods=\"INVITE,BYE,OPTIONS,ACK,CANCEL\",<sip:[email protected]> */
/* we want the next comma after the quotes */
char *tmp_comma;
char *tmp_quote1;
char *tmp_quote2;
tmp_quote1 = quote1;
tmp_quote2 = quote2;
tmp_comma = strchr(comma + 1, ',');
while (1) {
if (tmp_comma < tmp_quote1)
break; /* ok (before to quotes) */
if (tmp_comma < tmp_quote2) {
tmp_comma = strchr(tmp_quote2 + 1, ',');
}
tmp_quote1 = __osip_quote_find(tmp_quote2 + 1);
if (tmp_quote1 == NULL)
break;
tmp_quote2 = __osip_quote_find(tmp_quote1 + 1);
if (tmp_quote2 == NULL)
break; /* probably a malformed message? */
}
comma = tmp_comma; /* this one is not enclosed within quotes */
} else
comma = strchr(comma + 1, ',');
if (comma != NULL)
ptr = comma + 1;
} else if ((quote1 < comma) && (quote2 < comma)) { /* quotes are located before the comma, */
/* continue the search for next quotes */
ptr = quote2 + 1;
} else if ((quote1 < comma) && (comma < quote2)) { /* if comma is inside the quotes... */
/* continue with the next comma. */
ptr = quote2 + 1;
comma = strchr(ptr, ',');
if (comma == NULL)
/* this header last at the end of the line! */
{ /* this one does not need an allocation... */
#if 0
if (strlen(beg) < 2)
return OSIP_SUCCESS; /* empty header */
#else
if (beg[0] == '\0' || beg[1] == '\0')
return OSIP_SUCCESS; /* empty header */
#endif
osip_clrspace(beg);
i = osip_message_set__header(sip, hname, beg);
if (i != 0)
return i;
return OSIP_SUCCESS;
}
}
if (end != NULL) {
char *avalue;
if (end - beg + 1 < 2)
return OSIP_SYNTAXERROR;
avalue = (char *) osip_malloc(end - beg + 1);
if (avalue == NULL)
return OSIP_NOMEM;
osip_clrncpy(avalue, beg, end - beg);
/* really store the header in the sip structure */
i = osip_message_set__header(sip, hname, avalue);
osip_free(avalue);
if (i != 0)
return i;
beg = end + 1;
end = NULL;
if (comma == NULL)
/* this header last at the end of the line! */
{ /* this one does not need an allocation... */
#if 0
if (strlen(beg) < 2)
return OSIP_SUCCESS; /* empty header */
#else
if (beg[0] == '\0' || beg[1] == '\0')
return OSIP_SUCCESS; /* empty header */
#endif
osip_clrspace(beg);
i = osip_message_set__header(sip, hname, beg);
if (i != 0)
return i;
return OSIP_SUCCESS;
}
}
}
return OSIP_SYNTAXERROR; /* if comma is NULL, we should have already return 0 */
}
int
osip_message_set_multiple_header (osip_message_t * sip, char *hname, char *hvalue)
{
int i;
char *ptr, *p; /* current location of the search */
char *comma; /* This is the separator we are elooking for */
char *beg; /* beg of a header */
char *end; /* end of a header */
int inquotes, inuri; /* state for inside/outside of double-qoutes or URI */
size_t hname_len;
/* Find header based upon lowercase comparison */
osip_tolower (hname);
if (hvalue == NULL) {
i = osip_message_set__header (sip, hname, hvalue);
if (i != 0)
return i;
return OSIP_SUCCESS;
}
ptr = hvalue;
comma = strchr (ptr, ',');
hname_len = strlen (hname);
if (comma == NULL || (hname_len == 4 && strncmp (hname, "date", 4) == 0)
|| (hname_len == 1 && strncmp (hname, "t", 1) == 0)
|| (hname_len == 2 && strncmp (hname, "to", 2) == 0)
|| (hname_len == 1 && strncmp (hname, "f", 1) == 0)
|| (hname_len == 4 && strncmp (hname, "from", 4) == 0)
|| (hname_len == 1 && strncmp (hname, "i", 1) == 0)
|| (hname_len == 7 && strncmp (hname, "call-id", 7) == 0)
|| (hname_len == 4 && strncmp (hname, "cseq", 4) == 0)
|| (hname_len == 1 && strncmp (hname, "s", 1) == 0)
|| (hname_len == 7 && strncmp (hname, "subject", 7) == 0)
|| (hname_len == 7 && strncmp (hname, "expires", 7) == 0)
|| (hname_len == 6 && strncmp (hname, "server", 6) == 0)
|| (hname_len == 10 && strncmp (hname, "user-agent", 10) == 0)
|| (hname_len == 16 && strncmp (hname, "www-authenticate", 16) == 0)
|| (hname_len == 19 && strncmp (hname, "authentication-info", 19) == 0)
|| (hname_len == 18 && strncmp (hname, "proxy-authenticate", 18) == 0)
|| (hname_len == 19 && strncmp (hname, "proxy-authorization", 19) == 0)
|| (hname_len == 25 && strncmp (hname, "proxy-authentication-info", 25) == 0)
|| (hname_len == 12 && strncmp (hname, "organization", 12) == 0)
|| (hname_len == 13 && strncmp (hname, "authorization", 13) == 0)
|| (hname_len == 1 && strncmp (hname, "r", 1) == 0) /* refer-to */
|| (hname_len == 8 && strncmp (hname, "refer-to", 8) == 0)
|| (hname_len == 1 && strncmp (hname, "b", 1) == 0) /* referred-by */
|| (hname_len == 11 && strncmp (hname, "referred-by", 11) == 0))
/* there is no multiple header! likely */
/* to happen most of the time... */
/* or hname is a TEXT-UTF8-TRIM and may */
/* contain a comma. this is not a separator */
/* THIS DOES NOT WORK FOR UNKNOWN HEADER!!!! */
{
i = osip_message_set__header (sip, hname, hvalue);
if (i != 0)
return i;
return OSIP_SUCCESS;
}
beg = hvalue;
inquotes = 0;
inuri = 0;
/* Seach for a comma that is not within quotes or a URI */
for (;; ptr++)
{
switch (*ptr)
{
case '"':
/* Check that the '"' is not escaped */
for (i = 0, p = ptr; p >= beg && *p == '\\'; p--, i++);
if (i % 2 == 0)
inquotes = !inquotes; /* the '"' was not escaped */
break;
case '<':
if (!inquotes)
{
if (!inuri)
{
if((osip_strncasecmp(ptr+1, "sip:", 4) == 0
|| osip_strncasecmp(ptr+1, "sips:", 5) == 0
|| osip_strncasecmp(ptr+1, "http:", 5) == 0
|| osip_strncasecmp(ptr+1, "https:", 6) == 0
|| osip_strncasecmp(ptr+1, "tel:", 4) == 0)
&& strchr(ptr, '>'))
inuri = 1;
}
/*
else {
if we found such sequence: "<sip:" "<sip:" ">"
It might be a valid header containing data and not URIs.
Thus, we ignore inuri
}
*/
}
break;
case '>':
if (!inquotes)
{
if (inuri)
inuri = 0;
}
break;
case '\0':
/* we discard any validation we tried: no valid uri detected */
inquotes=0;
inuri=0;
case ',':
if (!inquotes && !inuri)
{
char *avalue;
if (beg[0] == '\0')
return OSIP_SUCCESS; /* empty header */
end = ptr;
if (end - beg + 1 < 2)
{
beg=end+1;
break; /* skip empty header */
}
avalue = (char *) osip_malloc (end - beg + 1);
if (avalue==NULL)
return OSIP_NOMEM;
osip_clrncpy (avalue, beg, end - beg);
/* really store the header in the sip structure */
i = osip_message_set__header (sip, hname, avalue);
osip_free (avalue);
if (i != 0)
return i;
beg = end + 1;
}
if (*ptr == '\0')
return OSIP_SUCCESS;
break;
default:
break;
}
}
}
int
eXosip_get_srv_record(struct osip_srv_record *record, char *domain, char *protocol)
{
querybuf answer; /* answer buffer from nameserver */
int n;
char zone[1024];
int ancount, qdcount; /* answer count and query count */
HEADER *hp; /* answer buffer header */
char hostbuf[256];
unsigned char *msg, *eom, *cp; /* answer buffer positions */
int dlen, type, aclass, pref, weight, port;
long ttl;
int answerno;
char tr[100];
memset(zone, 0, sizeof(zone));
memset(record, 0, sizeof(struct osip_srv_record));
if (domain == NULL || protocol == NULL)
return OSIP_BADPARAMETER;
if (eXosip.dns_capabilities <= 0)
return OSIP_UNKNOWN_HOST; /* disabled */
if (strlen(domain) + strlen(protocol) > 1000)
return OSIP_BADPARAMETER;
if (strlen(protocol) >= 100)
return OSIP_BADPARAMETER;
snprintf(tr, 100, protocol);
osip_tolower(tr);
if (eXosip.dns_capabilities >= 2)
n = eXosip_get_naptr(domain, protocol, zone, sizeof(zone) - 1);
else
n = -1; /* avoid NAPTR */
if (n == OSIP_SUCCESS && zone[0] == '\0') {
/* protocol is not listed in NAPTR answer: not supported */
return OSIP_UNKNOWN_HOST;
}
if (n != OSIP_SUCCESS) {
snprintf(zone, sizeof(zone) - 1, "_sip._%s.%s", tr, domain);
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"Using locally generated SRV record %s\n", zone));
}
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"About to ask for '%s IN SRV'\n", zone));
n = res_query(zone, C_IN, T_SRV, (unsigned char *) &answer, sizeof(answer));
if (n < (int) sizeof(HEADER)) {
return OSIP_UNKNOWN_HOST;
}
/* browse message and search for DNS answers part */
hp = (HEADER *) & answer;
qdcount = ntohs(hp->qdcount);
ancount = ntohs(hp->ancount);
msg = (unsigned char *) (&answer);
eom = (unsigned char *) (&answer) + n;
cp = (unsigned char *) (&answer) + sizeof(HEADER);
while (qdcount-- > 0 && cp < eom) {
n = dn_expand(msg, eom, cp, (char *) hostbuf, 256);
if (n < 0) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"Invalid SRV record answer for '%s': bad format\n", zone));
return OSIP_UNDEFINED_ERROR;
}
cp += n + QFIXEDSZ;
}
/* browse DNS answers */
answerno = 0;
/* loop through the answer buffer and extract SRV records */
while (ancount-- > 0 && cp < eom) {
struct osip_srv_entry *srventry;
n = dn_expand(msg, eom, cp, (char *) hostbuf, 256);
if (n < 0) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"Invalid SRV record answer for '%s': bad format\n", zone));
return OSIP_UNDEFINED_ERROR;
}
cp += n;
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
type = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(type, cp);
#else
NS_GET16(type, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
aclass = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(aclass, cp);
#else
NS_GET16(aclass, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
ttl = _get_long(cp);
cp += sizeof(u_long);
#elif defined(__APPLE_CC__)
GETLONG(ttl, cp);
#else
NS_GET32(ttl, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
dlen = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(dlen, cp);
#else
NS_GET16(dlen, cp);
#endif
if (type != T_SRV) {
cp += dlen;
continue;
}
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
pref = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(pref, cp);
#else
NS_GET16(pref, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
weight = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(weight, cp);
#else
NS_GET16(weight, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
port = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(port, cp);
#else
NS_GET16(port, cp);
#endif
n = dn_expand(msg, eom, cp, (char *) hostbuf, 256);
if (n < 0)
break;
cp += n;
srventry = &record->srventry[answerno];
snprintf(srventry->srv, sizeof(srventry->srv), "%s", hostbuf);
srventry->priority = pref;
srventry->weight = weight;
if (weight)
srventry->rweight = 1 + random() % (10000 * srventry->weight);
else
srventry->rweight = 0;
srventry->port = port;
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"SRV record %s IN SRV -> %s:%i/%i/%i/%i\n",
zone, srventry->srv, srventry->port, srventry->priority,
srventry->weight, srventry->rweight));
answerno++;
if (answerno == 10)
break;
}
if (answerno == 0)
return OSIP_UNKNOWN_HOST;
osip_srv_record_sort(record, answerno);
snprintf(record->name, sizeof(record->name), "%s", domain);
return OSIP_SUCCESS;
}
int
eXosip_get_naptr(char *domain, char *protocol, char *srv_record, int max_length)
{
querybuf answer; /* answer buffer from nameserver */
int n;
char zone[1024];
int ancount, qdcount; /* answer count and query count */
HEADER *hp; /* answer buffer header */
char hostbuf[256];
unsigned char *msg, *eom, *cp; /* answer buffer positions */
int dlen, type, aclass;
long ttl;
int answerno;
char tr[100];
memset(srv_record, 0, max_length);
if (domain == NULL || protocol == NULL)
return OSIP_BADPARAMETER;
if (strlen(domain) + strlen(protocol) > 1000)
return OSIP_BADPARAMETER;
if (strlen(protocol) >= 100)
return OSIP_BADPARAMETER;
snprintf(tr, 100, protocol);
osip_tolower(tr);
snprintf(zone, 1024, "%s", domain);
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"About to ask for '%s IN NAPTR\n", zone));
n = res_query(zone, C_IN, T_NAPTR, (unsigned char *) &answer, sizeof(answer));
if (n < (int) sizeof(HEADER)) {
return OSIP_UNKNOWN_HOST;
}
/* browse message and search for DNS answers part */
hp = (HEADER *) & answer;
qdcount = ntohs(hp->qdcount);
ancount = ntohs(hp->ancount);
msg = (unsigned char *) (&answer);
eom = (unsigned char *) (&answer) + n;
cp = (unsigned char *) (&answer) + sizeof(HEADER);
while (qdcount-- > 0 && cp < eom) {
n = dn_expand(msg, eom, cp, (char *) hostbuf, 256);
if (n < 0) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"Invalid SRV record answer for '%s': bad format\n", zone));
return OSIP_UNDEFINED_ERROR;
}
cp += n + QFIXEDSZ;
}
/* browse DNS answers */
answerno = 0;
/* loop through the answer buffer and extract SRV records */
while (ancount-- > 0 && cp < eom) {
int len;
typedef struct {
unsigned short order;
unsigned short pref;
char flag[256];
char service[1024];
char regexp[1024];
char replacement[1024];
} osip_naptr_t;
osip_naptr_t anaptr;
n = dn_expand(msg, eom, cp, (char *) hostbuf, 256);
if (n < 0) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"Invalid NAPTR answer for '%s': bad format\n", zone));
return OSIP_UNDEFINED_ERROR;
}
cp += n;
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
type = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(type, cp);
#else
NS_GET16(type, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
aclass = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(aclass, cp);
#else
NS_GET16(aclass, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
ttl = _get_long(cp);
cp += sizeof(u_long);
#elif defined(__APPLE_CC__)
GETLONG(ttl, cp);
#else
NS_GET32(ttl, cp);
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__) ||\
defined(OLD_NAMESER) || defined(__FreeBSD__)
dlen = _get_short(cp);
cp += sizeof(u_short);
#elif defined(__APPLE_CC__)
GETSHORT(dlen, cp);
#else
NS_GET16(dlen, cp);
#endif
if (type != T_NAPTR) {
cp += dlen;
continue;
}
memset(&anaptr, 0, sizeof(osip_naptr_t));
memcpy((void *) &anaptr.order, cp, 2);
anaptr.order = ntohs(anaptr.order); /*((unsigned short)cp[0] << 8) | ((unsigned short)cp[1]); */
cp += sizeof(unsigned short);
memcpy((void *) &anaptr.pref, cp, 2);
anaptr.pref = ntohs(anaptr.pref); /* ((unsigned short)cp[0] << 8) | ((unsigned short)cp[1]); */
cp += sizeof(unsigned short);
len = *cp;
cp++;
strncpy(anaptr.flag, (char *) cp, len);
anaptr.flag[len] = '\0';
cp += len;
len = *cp;
cp++;
strncpy(anaptr.service, (char *) cp, len);
anaptr.service[len] = '\0';
cp += len;
len = *cp;
cp++;
strncpy(anaptr.regexp, (char *) cp, len);
anaptr.regexp[len] = '\0';
cp += len;
n = dn_expand(msg, eom, cp, anaptr.replacement, 1024 - 1);
if (n < 0)
break;
cp += n;
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"NAPTR %s ->%i/%i/%s/%s/%s/%s\n",
zone, anaptr.order, anaptr.pref, anaptr.flag,
anaptr.service, anaptr.regexp, anaptr.replacement));
if (osip_strncasecmp(tr, "udp", 4) == 0
&& osip_strncasecmp(anaptr.service, "SIP+D2U", 8) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "tcp", 4) == 0
&& osip_strncasecmp(anaptr.service, "SIP+D2T", 8) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "udp-tls", 8) == 0
&& osip_strncasecmp(anaptr.service, "SIPS+D2U", 9) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "tls", 4) == 0
&& osip_strncasecmp(anaptr.service, "SIPS+D2T", 9) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "sctp", 5) == 0
&& osip_strncasecmp(anaptr.service, "SIP+D2S", 8) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
return OSIP_SUCCESS;
}
answerno++;
}
if (answerno == 0)
return OSIP_UNKNOWN_HOST;
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"protocol: %s is not supported by domain %s\n", protocol, domain));
return OSIP_SUCCESS;
}
int
eXosip_get_srv_record(struct osip_srv_record *record, char *domain, char *protocol)
{
char zone[1024];
PDNS_RECORD answer, tmp; /* answer buffer from nameserver */
int n;
char tr[100];
memset(zone, 0, sizeof(zone));
memset(record, 0, sizeof(struct osip_srv_record));
if (domain == NULL || protocol == NULL)
return OSIP_BADPARAMETER;
if (eXosip.dns_capabilities <= 0)
return OSIP_UNKNOWN_HOST; /* disabled */
if (strlen(domain) + strlen(protocol) > 1000)
return OSIP_BADPARAMETER;
if (strlen(protocol) >= 100)
return OSIP_BADPARAMETER;
snprintf(tr, 100, protocol);
osip_tolower(tr);
if (eXosip.dns_capabilities >= 2)
n = eXosip_get_naptr(domain, protocol, zone, sizeof(zone) - 1);
else
n = -1; /* avoid NAPTR */
if (n == OSIP_SUCCESS && zone[0] == '\0') {
/* protocol is not listed in NAPTR answer: not supported */
return OSIP_UNKNOWN_HOST;
}
if (n != OSIP_SUCCESS) {
if (osip_strcasecmp(tr, "TLS") == 0)
snprintf(zone, sizeof(zone) - 1, "_sips._tcp.%s", domain);
else if (osip_strcasecmp(tr, "DTLS") == 0)
snprintf(zone, sizeof(zone) - 1, "_sips._udp.%s", domain);
else
snprintf(zone, sizeof(zone) - 1, "_sip._%s.%s", tr, domain);
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"Using locally generated SRV record %s\n", zone));
}
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"About to ask for '%s IN SRV'\n", zone));
if (DnsQuery(zone, DNS_TYPE_SRV, DNS_QUERY_STANDARD, NULL, &answer, NULL) != 0) {
return OSIP_UNKNOWN_HOST;
}
n = 0;
for (tmp = answer; tmp != NULL; tmp = tmp->pNext) {
struct osip_srv_entry *srventry;
DNS_SRV_DATA *data;
if (tmp->wType != DNS_TYPE_SRV)
continue;
srventry = &record->srventry[n];
data = &tmp->Data.SRV;
snprintf(srventry->srv, sizeof(srventry->srv), "%s", data->pNameTarget);
srventry->priority = data->wPriority;
srventry->weight = data->wWeight;
if (srventry->weight)
srventry->rweight = 1 + rand() % (10000 * srventry->weight);
else
srventry->rweight = 0;
srventry->port = data->wPort;
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"SRV record %s IN SRV -> %s:%i/%i/%i/%i\n",
zone, srventry->srv, srventry->port, srventry->priority,
srventry->weight, srventry->rweight));
n++;
if (n == 10)
break;
}
DnsRecordListFree(answer, DnsFreeRecordList);
if (n == 0)
return OSIP_UNKNOWN_HOST;
osip_srv_record_sort(record, n);
snprintf(record->name, sizeof(record->name), "%s", domain);
return OSIP_SUCCESS;
}
int
eXosip_get_naptr(char *domain, char *protocol, char *srv_record, int max_length)
{
char zone[1024];
PDNS_RECORD answer, tmp; /* answer buffer from nameserver */
int n;
char tr[100];
memset(srv_record, 0, max_length);
if (domain == NULL || protocol == NULL)
return OSIP_BADPARAMETER;
if (strlen(domain) + strlen(protocol) > 1000)
return OSIP_BADPARAMETER;
if (strlen(protocol) >= 100)
return OSIP_BADPARAMETER;
snprintf(tr, 100, protocol);
osip_tolower(tr);
snprintf(zone, 1024, "%s", domain);
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"About to ask for '%s NAPTR'\n", zone));
if (DnsQuery(zone, DNS_TYPE_NAPTR, DNS_QUERY_STANDARD, NULL, &answer, NULL) !=
0) {
return OSIP_UNKNOWN_HOST;
}
n = 0;
for (tmp = answer; tmp != NULL; tmp = tmp->pNext) {
char *buf = (char *) &tmp->Data;
int len;
OSVERSIONINFOEX ovi;
typedef struct {
unsigned short order;
unsigned short pref;
char flag[256];
char service[1024];
char regexp[1024];
char replacement[1024];
} osip_naptr_t;
osip_naptr_t anaptr;
if (tmp->wType != DNS_TYPE_NAPTR)
continue;
memset(&anaptr, 0, sizeof(osip_naptr_t));
memset(&ovi, 0, sizeof(ovi));
ovi.dwOSVersionInfoSize = sizeof(ovi);
GetVersionEx((LPOSVERSIONINFO) & ovi);
/* Minimum: client: Windows 2000 Professional */
/* Minimum: server: Windows 2000 Server */
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"check OS support for NAPTR: %i %i %i\n",
ovi.dwMajorVersion, ovi.dwMinorVersion, ovi.dwBuildNumber));
if (ovi.dwMajorVersion > 5) {
#if (_WIN32_WINNT >= 0x0600)
/* RUN only on Vista? */
/* compile starting from SDK 6.0A? even on XP... */
anaptr.order = tmp->Data.NAPTR.wOrder;
anaptr.pref = tmp->Data.NAPTR.wPreference;
strncpy(anaptr.flag, tmp->Data.NAPTR.pFlags, sizeof(anaptr.flag) - 1);
strncpy(anaptr.service, tmp->Data.NAPTR.pService,
sizeof(anaptr.service) - 1);
strncpy(anaptr.regexp, tmp->Data.NAPTR.pRegularExpression,
sizeof(anaptr.regexp) - 1);
strncpy(anaptr.replacement, tmp->Data.NAPTR.pReplacement,
sizeof(anaptr.replacement) - 1);
#endif
}
else {
memcpy((void *) &anaptr.order, buf, 2);
anaptr.order = ntohs(anaptr.order); /* ((unsigned short)buf[0] << 8) | ((unsigned short)buf[1]); */
buf += sizeof(unsigned short);
memcpy((void *) &anaptr.pref, buf, 2);
anaptr.pref = ntohs(anaptr.pref); /* ((unsigned short)buf[0] << 8) | ((unsigned short)buf[1]); */
buf += sizeof(unsigned short);
len = *buf;
if (len < 0 || len > 255)
break;
buf++;
strncpy(anaptr.flag, buf, len);
anaptr.flag[len] = '\0';
buf += len;
len = *buf;
if (len < 0 || len > 1023)
break;
buf++;
strncpy(anaptr.service, buf, len);
anaptr.service[len] = '\0';
buf += len;
len = *buf;
if (len < 0 || len > 1023)
break;
buf++;
strncpy(anaptr.regexp, buf, len);
anaptr.regexp[len] = '\0';
buf += len;
len =
_eX_dn_expand((char *) &tmp->Data,
((char *) &tmp->Data) + tmp->wDataLength, buf,
anaptr.replacement, 1024 - 1);
if (len < 0)
break;
buf += len;
}
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"NAPTR %s ->%i/%i/%s/%s/%s/%s\n",
zone, anaptr.order, anaptr.pref, anaptr.flag,
anaptr.service, anaptr.regexp, anaptr.replacement));
if (osip_strncasecmp(tr, "udp", 4) == 0
&& osip_strncasecmp(anaptr.service, "SIP+D2U", 8) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
DnsRecordListFree(answer, DnsFreeRecordList);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "tcp", 4) == 0
&& osip_strncasecmp(anaptr.service, "SIP+D2T", 8) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
DnsRecordListFree(answer, DnsFreeRecordList);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "udp-tls", 8) == 0
&& osip_strncasecmp(anaptr.service, "SIPS+D2U", 9) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
DnsRecordListFree(answer, DnsFreeRecordList);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "tls", 4) == 0
&& osip_strncasecmp(anaptr.service, "SIPS+D2T", 9) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
DnsRecordListFree(answer, DnsFreeRecordList);
return OSIP_SUCCESS;
} else if (osip_strncasecmp(tr, "sctp", 5) == 0
&& osip_strncasecmp(anaptr.service, "SIP+D2S", 8) == 0) {
snprintf(srv_record, max_length, "%s", anaptr.replacement);
DnsRecordListFree(answer, DnsFreeRecordList);
return OSIP_SUCCESS;
}
n++;
}
DnsRecordListFree(answer, DnsFreeRecordList);
if (n == 0)
return OSIP_UNKNOWN_HOST;
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO2, NULL,
"protocol: %s is not supported by domain %s\n", protocol, domain));
return OSIP_SUCCESS;
}
