--- /dev/null
+/*
+ * $Id: buildreq.c,v 1.1 2002/01/22 16:03:02 dfs Exp $
+ *
+ * Copyright (C) 1995,1997 Lars Fenneberg
+ *
+ * See the file COPYRIGHT for the respective terms and conditions.
+ * If the file is missing contact me at lf@elemental.net
+ * and I'll send you a copy.
+ *
+ */
+
+#include <config.h>
+#include <includes.h>
+#include <radiusclient.h>
+
+unsigned char rc_get_seqnbr(void);
+
+/*
+ * Function: rc_buildreq
+ *
+ * Purpose: builds a skeleton RADIUS request using information from the
+ * config file.
+ *
+ */
+
+void rc_buildreq(SEND_DATA *data, int code, char *server, unsigned short port,
+ int timeout, int retries)
+{
+ data->server = server;
+ data->svc_port = port;
+ data->seq_nbr = rc_get_seqnbr();
+ data->timeout = timeout;
+ data->retries = retries;
+ data->code = code;
+}
+
+/*
+ * Function: rc_guess_seqnbr
+ *
+ * Purpose: return a random sequence number
+ *
+ */
+
+static unsigned char rc_guess_seqnbr(void)
+{
+ srandom((unsigned int)(time(NULL)+getpid()));
+ return (unsigned char)(random() & UCHAR_MAX);
+}
+
+/*
+ * Function: rc_get_seqnbr
+ *
+ * Purpose: generate a sequence number
+ *
+ */
+
+unsigned char rc_get_seqnbr(void)
+{
+ FILE *sf;
+ int tries = 1;
+ int seq_nbr;
+ char *seqfile = rc_conf_str("seqfile");
+
+ if ((sf = fopen(seqfile, "a+")) == NULL)
+ {
+ rc_log(LOG_ERR,"rc_get_seqnbr: couldn't open sequence file %s: %s", seqfile, strerror(errno));
+ /* well, so guess a sequence number */
+ return rc_guess_seqnbr();
+ }
+
+ while (do_lock_exclusive(fileno(sf))!= 0)
+ {
+ if (errno != EWOULDBLOCK) {
+ rc_log(LOG_ERR, "rc_get_seqnbr: flock failure: %s: %s", seqfile, strerror(errno));
+ fclose(sf);
+ return rc_guess_seqnbr();
+ }
+ tries++;
+ if (tries <= 10)
+ rc_mdelay(500);
+ else
+ break;
+ }
+
+ if (tries > 10) {
+ rc_log(LOG_ERR,"rc_get_seqnbr: couldn't get lock after %d tries: %s", tries-1, seqfile);
+ fclose(sf);
+ return rc_guess_seqnbr();
+ }
+
+ rewind(sf);
+ if (fscanf(sf, "%d", &seq_nbr) != 1) {
+ rc_log(LOG_ERR,"rc_get_seqnbr: fscanf failure: %s", seqfile);
+ seq_nbr = rc_guess_seqnbr();
+ }
+
+ rewind(sf);
+ ftruncate(fileno(sf),0);
+ fprintf(sf,"%d\n", (seq_nbr+1) & UCHAR_MAX);
+
+ fflush(sf); /* fflush because a process may read it between the do_unlock and fclose */
+
+ if (do_unlock(fileno(sf)) != 0)
+ rc_log(LOG_ERR, "rc_get_seqnbr: couldn't release lock on %s: %s", seqfile, strerror(errno));
+
+ fclose(sf);
+
+ return (unsigned char)seq_nbr;
+}
+
+/*
+ * Function: rc_auth
+ *
+ * Purpose: Builds an authentication request for port id client_port
+ * with the value_pairs send and submits it to a server
+ *
+ * Returns: received value_pairs in received, messages from the server in msg
+ * and 0 on success, negative on failure as return value
+ *
+ */
+
+int rc_auth(UINT4 client_port, VALUE_PAIR *send, VALUE_PAIR **received,
+ char *msg)
+{
+ SEND_DATA data;
+ UINT4 client_id;
+ int result;
+ int i;
+ SERVER *authserver = rc_conf_srv("authserver");
+ int timeout = rc_conf_int("radius_timeout");
+ int retries = rc_conf_int("radius_retries");
+
+ data.send_pairs = send;
+ data.receive_pairs = NULL;
+
+ /*
+ * Fill in NAS-IP-Address
+ */
+
+ if ((client_id = rc_own_ipaddress()) == 0)
+ return (ERROR_RC);
+
+ if (rc_avpair_add(&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0, VENDOR_NONE) == NULL)
+ return (ERROR_RC);
+
+ /*
+ * Fill in NAS-Port
+ */
+
+ if (rc_avpair_add(&(data.send_pairs), PW_NAS_PORT, &client_port, 0, VENDOR_NONE) == NULL)
+ return (ERROR_RC);
+
+ result = ERROR_RC;
+ for(i=0; (i<authserver->max) && (result != OK_RC) && (result != BADRESP_RC)
+ ; i++)
+ {
+ if (data.receive_pairs != NULL) {
+ rc_avpair_free(data.receive_pairs);
+ data.receive_pairs = NULL;
+ }
+ rc_buildreq(&data, PW_ACCESS_REQUEST, authserver->name[i],
+ authserver->port[i], timeout, retries);
+
+ result = rc_send_server (&data, msg);
+ }
+
+ *received = data.receive_pairs;
+
+ return result;
+}
+
+/*
+ * Function: rc_auth_proxy
+ *
+ * Purpose: Builds an authentication request
+ * with the value_pairs send and submits it to a server.
+ * Works for a proxy; does not add IP address, and does
+ * does not rely on config file.
+ *
+ * Returns: received value_pairs in received, messages from the server in msg
+ * and 0 on success, negative on failure as return value
+ *
+ */
+
+int rc_auth_proxy(VALUE_PAIR *send, VALUE_PAIR **received, char *msg)
+{
+ SEND_DATA data;
+ int result;
+ int i;
+ SERVER *authserver = rc_conf_srv("authserver");
+ int timeout = rc_conf_int("radius_timeout");
+ int retries = rc_conf_int("radius_retries");
+
+ data.send_pairs = send;
+ data.receive_pairs = NULL;
+
+ result = ERROR_RC;
+ for(i=0; (i<authserver->max) && (result != OK_RC) && (result != BADRESP_RC)
+ ; i++)
+ {
+ if (data.receive_pairs != NULL) {
+ rc_avpair_free(data.receive_pairs);
+ data.receive_pairs = NULL;
+ }
+ rc_buildreq(&data, PW_ACCESS_REQUEST, authserver->name[i],
+ authserver->port[i], timeout, retries);
+
+ result = rc_send_server (&data, msg);
+ }
+
+ *received = data.receive_pairs;
+
+ return result;
+}
+
+
+/*
+ * Function: rc_acct
+ *
+ * Purpose: Builds an accounting request for port id client_port
+ * with the value_pairs send
+ *
+ * Remarks: NAS-IP-Address, NAS-Port and Acct-Delay-Time get filled
+ * in by this function, the rest has to be supplied.
+ */
+
+int rc_acct(UINT4 client_port, VALUE_PAIR *send)
+{
+ SEND_DATA data;
+ VALUE_PAIR *adt_vp;
+ UINT4 client_id;
+ int result;
+ time_t start_time, dtime;
+ char msg[4096];
+ int i;
+ SERVER *acctserver = rc_conf_srv("acctserver");
+ int timeout = rc_conf_int("radius_timeout");
+ int retries = rc_conf_int("radius_retries");
+
+ data.send_pairs = send;
+ data.receive_pairs = NULL;
+
+ /*
+ * Fill in NAS-IP-Address
+ */
+
+ if ((client_id = rc_own_ipaddress()) == 0)
+ return (ERROR_RC);
+
+ if (rc_avpair_add(&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0, VENDOR_NONE) == NULL)
+ return (ERROR_RC);
+
+ /*
+ * Fill in NAS-Port
+ */
+
+ if (rc_avpair_add(&(data.send_pairs), PW_NAS_PORT, &client_port, 0, VENDOR_NONE) == NULL)
+ return (ERROR_RC);
+
+ /*
+ * Fill in Acct-Delay-Time
+ */
+
+ dtime = 0;
+ if ((adt_vp = rc_avpair_add(&(data.send_pairs), PW_ACCT_DELAY_TIME, &dtime, 0, VENDOR_NONE)) == NULL)
+ return (ERROR_RC);
+
+ start_time = time(NULL);
+ result = ERROR_RC;
+ for(i=0; (i<acctserver->max) && (result != OK_RC) && (result != BADRESP_RC)
+ ; i++)
+ {
+ if (data.receive_pairs != NULL) {
+ rc_avpair_free(data.receive_pairs);
+ data.receive_pairs = NULL;
+ }
+ rc_buildreq(&data, PW_ACCOUNTING_REQUEST, acctserver->name[i],
+ acctserver->port[i], timeout, retries);
+
+ dtime = time(NULL) - start_time;
+ rc_avpair_assign(adt_vp, &dtime, 0);
+
+ result = rc_send_server (&data, msg);
+ }
+
+ rc_avpair_free(data.receive_pairs);
+
+ return result;
+}
+
+/*
+ * Function: rc_acct_proxy
+ *
+ * Purpose: Builds an accounting request with the value_pairs send
+ *
+ */
+
+int rc_acct_proxy(VALUE_PAIR *send)
+{
+ SEND_DATA data;
+ int result;
+ char msg[4096];
+ int i;
+ SERVER *acctserver = rc_conf_srv("authserver");
+ int timeout = rc_conf_int("radius_timeout");
+ int retries = rc_conf_int("radius_retries");
+
+ data.send_pairs = send;
+ data.receive_pairs = NULL;
+
+ result = ERROR_RC;
+ for(i=0; (i<acctserver->max) && (result != OK_RC) && (result != BADRESP_RC)
+ ; i++)
+ {
+ if (data.receive_pairs != NULL) {
+ rc_avpair_free(data.receive_pairs);
+ data.receive_pairs = NULL;
+ }
+ rc_buildreq(&data, PW_ACCOUNTING_REQUEST, acctserver->name[i],
+ acctserver->port[i], timeout, retries);
+
+ result = rc_send_server (&data, msg);
+ }
+
+ rc_avpair_free(data.receive_pairs);
+
+ return result;
+}
+
+/*
+ * Function: rc_check
+ *
+ * Purpose: ask the server hostname on the specified port for a
+ * status message
+ *
+ */
+
+int rc_check(char *host, unsigned short port, char *msg)
+{
+ SEND_DATA data;
+ int result;
+ UINT4 client_id, service_type;
+ int timeout = rc_conf_int("radius_timeout");
+ int retries = rc_conf_int("radius_retries");
+
+ data.send_pairs = data.receive_pairs = NULL;
+
+ /*
+ * Fill in NAS-IP-Address, although it isn't neccessary
+ */
+
+ if ((client_id = rc_own_ipaddress()) == 0)
+ return (ERROR_RC);
+
+ rc_avpair_add(&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0, VENDOR_NONE);
+
+ /*
+ * Fill in Service-Type
+ */
+
+ service_type = PW_ADMINISTRATIVE;
+ rc_avpair_add(&(data.send_pairs), PW_SERVICE_TYPE, &service_type, 0, VENDOR_NONE);
+
+ rc_buildreq(&data, PW_STATUS_SERVER, host, port, timeout, retries);
+ result = rc_send_server (&data, msg);
+
+ rc_avpair_free(data.receive_pairs);
+
+ return result;
+}
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