1 /*********************************************************************** 2 * 3 * radattr.c 4 * 5 * A plugin which is stacked on top of radius.so. This plugin writes 6 * all RADIUS attributes from the server's authentication confirmation 7 * into /var/run/radattr.pppN. These attributes are available for 8 * consumption by /etc/ppp/ip-{up,down} scripts. 9 * 10 * Copyright (C) 2002 Roaring Penguin Software Inc. 11 * 12 * This plugin may be distributed according to the terms of the GNU 13 * General Public License, version 2 or (at your option) any later version. 14 * 15 ***********************************************************************/ 16 17 static char const RCSID[] = 18 "$Id: radattr.c,v 1.2 2004/10/28 00:24:40 paulus Exp $"; 19 20 #include "pppd.h" 21 #include "radiusclient.h" 22 #include <stdio.h> 23 24 extern void (*radius_attributes_hook)(VALUE_PAIR *); 25 static void print_attributes(VALUE_PAIR *); 26 static void cleanup(void *opaque, int arg); 27 28 char pppd_version[] = VERSION; 29 30 /********************************************************************** 31 * %FUNCTION: plugin_init 32 * %ARGUMENTS: 33 * None 34 * %RETURNS: 35 * Nothing 36 * %DESCRIPTION: 37 * Initializes radattr plugin. 38 ***********************************************************************/ 39 void 40 plugin_init(void) 41 { 42 radius_attributes_hook = print_attributes; 43 44 #if 0 45 /* calling cleanup() on link down is problematic because print_attributes() 46 is called only after PAP or CHAP authentication, but not when the link 47 should go up again for any other reason */ 48 add_notifier(&link_down_notifier, cleanup, NULL); 49 #endif 50 51 /* Just in case... */ 52 add_notifier(&exitnotify, cleanup, NULL); 53 info("RADATTR plugin initialized."); 54 } 55 56 /********************************************************************** 57 * %FUNCTION: print_attributes 58 * %ARGUMENTS: 59 * vp -- linked-list of RADIUS attribute-value pairs 60 * %RETURNS: 61 * Nothing 62 * %DESCRIPTION: 63 * Prints the attribute pairs to /var/run/radattr.pppN. Each line of the 64 * file contains "name value" pairs. 65 ***********************************************************************/ 66 static void 67 print_attributes(VALUE_PAIR *vp) 68 { 69 FILE *fp; 70 char fname[512]; 71 char name[2048]; 72 char value[2048]; 73 int cnt = 0; 74 75 slprintf(fname, sizeof(fname), "/var/run/radattr.%s", ifname); 76 fp = fopen(fname, "w"); 77 if (!fp) { 78 warn("radattr plugin: Could not open %s for writing: %m", fname); 79 return; 80 } 81 82 for (; vp; vp=vp->next) { 83 if (rc_avpair_tostr(vp, name, sizeof(name), value, sizeof(value)) < 0) { 84 continue; 85 } 86 fprintf(fp, "%s %s\n", name, value); 87 cnt++; 88 } 89 fclose(fp); 90 dbglog("RADATTR plugin wrote %d line(s) to file %s.", cnt, fname); 91 } 92 93 /********************************************************************** 94 * %FUNCTION: cleanup 95 * %ARGUMENTS: 96 * opaque -- not used 97 * arg -- not used 98 * %RETURNS: 99 * Nothing 100 * %DESCRIPTION: 101 * Deletes /var/run/radattr.pppN 102 ***********************************************************************/ 103 static void 104 cleanup(void *opaque, int arg) 105 { 106 char fname[512]; 107 108 slprintf(fname, sizeof(fname), "/var/run/radattr.%s", ifname); 109 (void) remove(fname); 110 dbglog("RADATTR plugin removed file %s.", fname); 111 } 112
