diff -r 8f552d1cd671 -r 67e813202d53 opensips/opensips.patch.uac
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/opensips/opensips.patch.uac	Wed Sep 21 14:04:16 2011 +0200
@@ -0,0 +1,195 @@
+Index: modules/uac/auth.c
+diff -Nau modules/uac/auth.c.orig modules/uac/auth.c
+--- modules/uac/auth.c.orig	2008-08-03 15:53:40.000000000 +0200
++++ modules/uac/auth.c	2009-03-24 21:48:53.478867420 +0100
+@@ -143,14 +143,172 @@
+ 	HASHHEX response;
+ 	str *new_hdr;
+ 
++	/* pretransact */
++	int nret = 0;
++	pv_value_t pv_val;
++	str *newuri = 0;
++	struct uac_credential *tst = 0;
++	struct hdr_field *tmp_hdr = 0;
++	struct hdr_field *del_hdr = 0;
++
++
++	/* Goes something like this...                          */
++	/* HA1 = echo -n 'username:realm:password' | md5sum     */
++	/*       echo -n 'itsme:mydom.com:stupidpass' | md5sum  */
++	/* HA2 = echo -n 'message:uri' | md5sum                 */
++	/*       echo -n 'INVITE:sip:danc@ing.fool.es' | md5sum */
++	/* Response = echo -n 'HA1:nonce:HA2' | md5sum          */
+ 	/* get transaction */
+ 	t = uac_tmb.t_gett();
+-	if (t==T_UNDEFINED || t==T_NULL_CELL)
+-	{
+-		LM_CRIT("no current transaction found\n");
+-		goto error;
+-	}
++	if (t==T_UNDEFINED || t==T_NULL_CELL) {
++		/* begin without any transaction */
++		/* set relevant structure variables */
++		crd = 0;
++		crd = pkg_malloc(sizeof(struct uac_credential));
++		if (!crd) {
++			LM_ERR("no more pkg memory\n");
++			goto error;
++		}
++
++		/* set the realm from existing UAC message */
++		tmp_hdr = msg->proxy_auth;
++		del_hdr = 0;
++		while (tmp_hdr) {
++			crd->realm.s = strchr(strstr(tmp_hdr->body.s, "realm="), '"') + 1;
++			crd->realm.len = strchr(crd->realm.s, '"') - crd->realm.s;
++			if(pv_get_spec_value(msg, &auth_realm_spec, &pv_val)==0 \
++				&& pv_val.rs.len>0) /* ensure realm is the desired one */
++				if (strncmp(crd->realm.s, pv_val.rs.s, crd->realm.len)==0)
++					del_hdr = tmp_hdr;
++			tmp_hdr = tmp_hdr->sibling;
++		}
++		if (del_hdr)
++			crd->realm = pv_val.rs;	/* success */
++		else
++			nret++;					/* failure */
++
++		/* set username from new AVP proxy values */
++		if(pv_get_spec_value(msg, &auth_username_spec, &pv_val)!=0 \
++			|| pv_val.flags&PV_VAL_NULL || pv_val.rs.len<=0)
++			nret++; /* signal failure with nonzero value */
++		else
++			crd->user = pv_val.rs;
++
++		/* set password from new AVP proxy values */
++		if(pv_get_spec_value(msg, &auth_password_spec, &pv_val)!=0 \
++			|| pv_val.flags&PV_VAL_NULL || pv_val.rs.len<=0)
++			nret++; /* signal failure with nonzero value */
++		else
++			crd->passwd = pv_val.rs;
++
++		if (nret) { /* if not found, look into predefined credentials */
++			tst = uac_auth_api._lookup_realm(&crd->realm);
++
++			if (tst==0) { /* found? */
++				LM_DBG("no credential for realm \"%.*s\"\n", \
++					crd->realm.len, crd->realm.s);
++				pkg_free(crd);
++				goto error;
++			}
++
++			crd = tst; /* use predefined credentials */
++			/* set the realm from existing UAC message */
++			tmp_hdr = msg->proxy_auth;
++			del_hdr = 0;
++			while (tmp_hdr) {
++				if(pv_get_spec_value(msg, &auth_realm_spec, &pv_val)==0 \
++					&& pv_val.rs.len>0) /* ensure realm is the desired one */
++					if (strncmp(crd->realm.s, pv_val.rs.s, crd->realm.len)==0)
++						del_hdr = tmp_hdr;
++				tmp_hdr = tmp_hdr->sibling;
++			}
++			if (del_hdr == 0) { /* proxy-auth header matching realm not found */
++				LM_DBG("no credential for realm \"%.*s\"\n", \
++					crd->realm.len, crd->realm.s);
++				pkg_free(crd);
++				goto error;
++			}
++		}
++
++		/* set the uri from existing UAC message */
++		newuri = pkg_malloc(sizeof(str));
++		if (!newuri) {
++			LM_ERR("no more pkg memory\n");
++			goto error;
++		}
++		newuri->s = pkg_malloc(msg->new_uri.len);
++		if (!newuri->s) {
++			LM_ERR("no more pkg memory\n");
++			pkg_free(newuri);
++			goto error;
++		}
++		newuri->len = msg->new_uri.len;
++		strncpy(newuri->s, msg->new_uri.s, msg->new_uri.len);
++		if (!newuri->s) {
++			LM_DBG("failed to retrieve URI from UAC message\n");
++			pkg_free(newuri->s);
++			pkg_free(newuri);
++			goto error;
++		}
++
++		/* set the nonce from existing UAC message */
++		tmp_hdr = msg->proxy_auth;
++		auth->nonce.len = 0;
++		auth->nonce.s = 0;
++		while (tmp_hdr) {
++			if(pv_get_spec_value(msg, &auth_realm_spec, &pv_val)==0 \
++				&& pv_val.rs.len>0) /* ensure realm is the desired one */
++				if (strncmp(crd->realm.s, pv_val.rs.s, crd->realm.len)==0) {
++					auth->nonce.s = strchr(strstr(tmp_hdr->body.s, "nonce="), '"') + 1;
++					auth->nonce.len = strchr(auth->nonce.s, '"') - auth->nonce.s;
++				}
++			tmp_hdr = tmp_hdr->sibling;
++		}
++		if (auth->nonce.s == 0) {
++			LM_DBG("failed to retrieve nonce from UAC message\n");
++			pkg_free(crd);
++			goto error;
++		}
++
++		/* do authentication */
++		uac_auth_api._do_uac_auth(msg, newuri, crd, auth, &auth_nc_cnonce, response);
++		if (response==0) {
++			LM_ERR("failed to calculate challenge response\n");
++			pkg_free(crd);
++			goto error;
++		}
++
++		/* build the authorization header */
++		new_hdr = uac_auth_api._build_authorization_hdr(407, newuri, crd, auth, &auth_nc_cnonce, response);
++		if (new_hdr==0) {
++			LM_ERR("failed to build authorization hdr\n");
++			pkg_free(crd);
++			goto error;
++		}
++
++		/* remove the old proxy-auth header and relink message index    */
++		/* before updating the authorization credentials of the message */
++		if (del_hdr) { /* updated a record and must remove the old one  */
++			if (del_lump(msg, del_hdr->name.s - msg->buf, del_hdr->len, 0)==0) {
++				LM_ERR("can't remove credentials\n");
++				pkg_free(crd);
++				goto error;
++			}
++		}
++
++		/* so far, so good -> add the header and set the proper RURI */
++		if (apply_urihdr_changes(msg, newuri, new_hdr)<0)
++		{
++			LM_ERR("failed to apply changes\n");
++			pkg_free(crd);
++			goto error;
++		}
++
++		pkg_free(crd); /* finished calculating new response string, success */
++		return 0;
++	} /* if (t==T_UNDEFINED || t==T_NULL_CELL) */
+ 
++	/* begin with transaction reply */
+ 	/* get the selected branch */
+ 	branch = uac_tmb.t_get_picked();
+ 	if (branch<0) {
+Index: modules/uac/uac.c
+diff -Nau modules/uac/uac.c.orig modules/uac/uac.c
+--- modules/uac/uac.c.orig	2008-08-03 15:53:40.000000000 +0200
++++ modules/uac/uac.c	2009-03-24 21:49:48.922890737 +0100
+@@ -117,7 +117,7 @@
+ 			REQUEST_ROUTE|BRANCH_ROUTE|FAILURE_ROUTE },
+ 	{"uac_auth",          (cmd_function)w_uac_auth,       0,
+ 			0, 0,
+-			FAILURE_ROUTE },
++			REQUEST_ROUTE|FAILURE_ROUTE },
+ 	{0,0,0,0,0,0}
+ };
+