Hello Users! Here is the story. I`m working in mobile telecommunications company. We are using Kannel WAP and SMS gateway for serving our customers. For some newer phones we also run squid http-proxy. WAP-aware phones are served by our dedicated Cisco AS5300 network access server.
A few month ago we decided to run Mbuni MMS gateway. Almost everything works good, but one problem: MSISDN! By default, incoming MMS messagesare signed with IP-address of sender, not the MSISDN. It is unacceptable for us.
Mbuni expects special http-header (X-WAP-Network-Client) to be set by Kannel. This header contains user MSISDN. The Kannel configuration, in its turn, must
be RADIUS-aware. So, Kannel get`s MSISDN from the RADIUS server and passes special http-header toward Mbuni. Looks fine? But what about "some newer phones", which use squid instead of Kannel`s wapbox? Squid is unable to set a magic MSISDN header for us.May be there is a better way to solve this problem (e.g. see Mbuni detokenizer
library), but I have my own. It consists of three pieces. They are 1. Patch for Mbuni 1.0.0 2. Tiny perl script with RSH Cisco commands 3. Snippet of Cisco configuration to work with Remote shell (RSH) The main idea is very simple. Suppose that WAP-phone is currently connected to the Cisco. # show call calltracker active This Cisco command shows active calls. Command output (phone numbers are changed): -------------------------- call handle= 2154 -------------------------- status=Active, service=PPP, origin=Answer, category=Modem DS0 slot/port/ds1/chan=0/0/0/1, called=123, calling=123456789 userid=wap, ip=aaa.bbb.ccc.ddd, mask=0.0.0.0setup=09/27/2005 15:01:59, conn=0.10, phys=22.77, service=36.59, authen=36.59
init rx/tx b-rate=33600/31200, rx/tx chars=193160/1155850 resource slot/port=1/47, mp bundle=0, charged units=0, account id=0 idb handle=0x61EED7E8, tty handle=0x619C4C84, tcb handle=0x0 ---------------------------------------------------------------------------- We see that user with MSISDN '123456789' called the number 123. User IP-address is aaa.bbb.ccc.ddd. This is exactly we want: mapping between IP-address and MSISDN! Using this patch, Mbuni will run RSH command 'show call calltracker active' to find MSISDN of a user with a given IP-address. To run RSH commands on Cisco you need something like this: =8<=============== no ip rcmd domain-lookup ip rcmd rsh-enable ip rcmd remote-host Cisco_user aaa.bbb.ccc.ddd mbuni enable =8<=============== First lines are used to enable RSH on Cisco. Last line permits RSH for user 'mbuni' from host aaa.bbb.ccc.ddd. Cisco_user is a valid user on Cisco NAS. -- Good luck! Alexander Simakov.
get_msisdn.pl
Description: Perl program
diff -Naur mbuni-orig/mmlib/mms_util.c mbuni-1.0.0/mmlib/mms_util.c
--- mbuni-orig/mmlib/mms_util.c 2005-07-26 08:44:58.000000000 +0400
+++ mbuni-1.0.0/mmlib/mms_util.c 2005-09-12 17:10:51.000000000 +0400
@@ -26,6 +26,8 @@
#include "mms_queue.h"
#include "mms_uaprof.h"
+#define GET_MSISDN "/usr/local/bin/get_msisdn.pl"
+
#define MAXQTRIES 100
#define BACKOFF_FACTOR 5*60 /* In seconds */
#define QUEUERUN_INTERVAL 15*60 /* 15 minutes. */
@@ -422,28 +424,30 @@
}
-Octstr *mms_find_sender_msisdn(Octstr *send_url, List *request_hdrs, Octstr
*msisdn_header,
- MmsDetokenizerFuncStruct* detokenizerfuncs)
+Octstr *mms_find_sender_msisdn(List *request_hdrs, Octstr *ip_header)
{
- /* Either we have a WAP gateway header as defined, or we look for
- * last part of url, pass it to detokenizer lib if defined, and back
comes our number.
- */
-
- Octstr *phonenum = http_header_value(request_hdrs,
- msisdn_header);
-
- if (!phonenum || octstr_len(phonenum) == 0) {
- List *l = octstr_split(send_url, octstr_imm("/"));
-
- if (l && list_len(l) > 1) {
- if (detokenizerfuncs)
- phonenum = detokenizerfuncs->mms_detokenize(list_get(l,
list_len(l) - 1));
+ Octstr *ip = http_header_value(request_hdrs, ip_header);
+ Octstr *cmd = NULL, *msisdn = NULL;
+ FILE *fp;
+ char buf[4096];
+
+ info(0, "Resolving user MSISDN");
+
+ cmd = octstr_format("%s %s", GET_MSISDN, octstr_get_cstr(ip));
+ info(0, "Calling \"%s\"", octstr_get_cstr(cmd));
+ if ((fp = popen(octstr_get_cstr(cmd), "r"))) {
+ if (fgets(buf, sizeof buf, fp) != NULL) {
+ msisdn = octstr_create(buf);
+ octstr_strip_crlfs(msisdn);
}
- if (l)
- list_destroy(l, (list_item_destructor_t *)octstr_destroy);
+ pclose(fp);
}
-
- return phonenum;
+ info(0, "%s \"%s\", returned msisdn = %s",
+ fp ? "Called" : "Failed to call",
+ octstr_get_cstr(cmd),
+ msisdn ? octstr_get_cstr(msisdn) : "null");
+ octstr_destroy(cmd);
+ return msisdn;
}
Octstr *mms_find_sender_ip(List *request_hdrs, Octstr *ip_header, Octstr *ip,
int *isv6)
diff -Naur mbuni-orig/mmlib/mms_util.h mbuni-1.0.0/mmlib/mms_util.h
--- mbuni-orig/mmlib/mms_util.h 2005-07-26 08:44:59.000000000 +0400
+++ mbuni-1.0.0/mmlib/mms_util.h 2005-09-12 17:11:02.000000000 +0400
@@ -146,7 +146,7 @@
extern int mms_decodefetchurl(Octstr *fetch_url,
Octstr **qf, Octstr **token, int *loc);
-Octstr *mms_find_sender_msisdn(Octstr *send_url, List *request_hdrs, Octstr
*msisdn_header, MmsDetokenizerFuncStruct *detokenizerfuncs);
+Octstr *mms_find_sender_msisdn(List *request_hdrs, Octstr *ip_header);
Octstr *mms_find_sender_ip(List *request_hdrs, Octstr *ip_header, Octstr *ip,
int *isv6);
extern Octstr *mms_isodate(time_t t);
diff -Naur mbuni-orig/mmsc/mmsproxy.c mbuni-1.0.0/mmsc/mmsproxy.c
--- mbuni-orig/mmsc/mmsproxy.c 2005-07-26 08:44:57.000000000 +0400
+++ mbuni-1.0.0/mmsc/mmsproxy.c 2005-09-12 17:11:42.000000000 +0400
@@ -141,10 +141,7 @@
h.prof = mms_make_ua_profile(h.headers);
/* Get the sender address. */
- h.base_client_addr = mms_find_sender_msisdn(h.url,
- h.headers,
-
settings->wap_gw_msisdn_header,
-
settings->mms_detokenizefuncs);
+ h.base_client_addr = mms_find_sender_msisdn(h.headers,
settings->wap_gw_ip_header);
if (!h.base_client_addr) { /* Set to IP sender... XXXX assumes
ipv4 only for now*/
if (settings->allow_ip_type) {
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