Annotation of embedaddon/igmpproxy/src/igmpproxy.h, revision 1.1
1.1 ! misho 1: /*
! 2: ** igmpproxy - IGMP proxy based multicast router
! 3: ** Copyright (C) 2005 Johnny Egeland <johnny@rlo.org>
! 4: **
! 5: ** This program is free software; you can redistribute it and/or modify
! 6: ** it under the terms of the GNU General Public License as published by
! 7: ** the Free Software Foundation; either version 2 of the License, or
! 8: ** (at your option) any later version.
! 9: **
! 10: ** This program is distributed in the hope that it will be useful,
! 11: ** but WITHOUT ANY WARRANTY; without even the implied warranty of
! 12: ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 13: ** GNU General Public License for more details.
! 14: **
! 15: ** You should have received a copy of the GNU General Public License
! 16: ** along with this program; if not, write to the Free Software
! 17: ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
! 18: **
! 19: **----------------------------------------------------------------------------
! 20: **
! 21: ** This software is derived work from the following software. The original
! 22: ** source code has been modified from it's original state by the author
! 23: ** of igmpproxy.
! 24: **
! 25: ** smcroute 0.92 - Copyright (C) 2001 Carsten Schill <carsten@cschill.de>
! 26: ** - Licensed under the GNU General Public License, version 2
! 27: **
! 28: ** mrouted 3.9-beta3 - COPYRIGHT 1989 by The Board of Trustees of
! 29: ** Leland Stanford Junior University.
! 30: ** - Original license can be found in the Stanford.txt file.
! 31: **
! 32: */
! 33: /**
! 34: * igmpproxy.h - Header file for common includes.
! 35: */
! 36:
! 37: #include <errno.h>
! 38: #include <stdarg.h>
! 39: #include <stdio.h>
! 40: #include <stdlib.h>
! 41: #include <syslog.h>
! 42: #include <signal.h>
! 43: #include <unistd.h>
! 44: #include <string.h>
! 45: #include <fcntl.h>
! 46: #include <stdbool.h>
! 47:
! 48: #include <sys/socket.h>
! 49: #include <sys/un.h>
! 50: #include <sys/time.h>
! 51: #include <sys/ioctl.h>
! 52: #include <sys/param.h>
! 53:
! 54: #include <net/if.h>
! 55: #include <netinet/in.h>
! 56: #include <arpa/inet.h>
! 57:
! 58: #include "os.h"
! 59: #include "config.h"
! 60:
! 61: /*
! 62: * Limit on length of route data
! 63: */
! 64: #define MAX_IP_PACKET_LEN 576
! 65: #define MIN_IP_HEADER_LEN 20
! 66: #define MAX_IP_HEADER_LEN 60
! 67:
! 68: #define MAX_MC_VIFS 32 // !!! check this const in the specific includes
! 69:
! 70: // Useful macros..
! 71: #define VCMC( Vc ) (sizeof( Vc ) / sizeof( (Vc)[ 0 ] ))
! 72: #define VCEP( Vc ) (&(Vc)[ VCMC( Vc ) ])
! 73:
! 74: // Bit manipulation macros...
! 75: #define BIT_ZERO(X) ((X) = 0)
! 76: #define BIT_SET(X,n) ((X) |= 1 << (n))
! 77: #define BIT_CLR(X,n) ((X) &= ~(1 << (n)))
! 78: #define BIT_TST(X,n) ((X) & 1 << (n))
! 79:
! 80:
! 81: //#################################################################################
! 82: // Globals
! 83: //#################################################################################
! 84:
! 85: /*
! 86: * External declarations for global variables and functions.
! 87: */
! 88: #define RECV_BUF_SIZE 8192
! 89: extern char *recv_buf;
! 90: extern char *send_buf;
! 91:
! 92: extern char s1[];
! 93: extern char s2[];
! 94: extern char s3[];
! 95: extern char s4[];
! 96:
! 97:
! 98:
! 99: //#################################################################################
! 100: // Lib function prototypes.
! 101: //#################################################################################
! 102:
! 103: /* syslog.c
! 104: */
! 105: extern bool Log2Stderr; // Log to stderr instead of to syslog
! 106: extern int LogLevel; // Log threshold, LOG_WARNING .... LOG_DEBUG
! 107:
! 108: void my_log( int Serverity, int Errno, const char *FmtSt, ... );
! 109:
! 110: /* ifvc.c
! 111: */
! 112: #define MAX_IF 40 // max. number of interfaces recognized
! 113:
! 114: // Interface states
! 115: #define IF_STATE_DISABLED 0 // Interface should be ignored.
! 116: #define IF_STATE_UPSTREAM 1 // Interface is the upstream interface
! 117: #define IF_STATE_DOWNSTREAM 2 // Interface is a downstream interface
! 118:
! 119: // Multicast default values...
! 120: #define DEFAULT_ROBUSTNESS 2
! 121: #define DEFAULT_THRESHOLD 1
! 122: #define DEFAULT_RATELIMIT 0
! 123:
! 124: // Define timer constants (in seconds...)
! 125: #define INTERVAL_QUERY 125
! 126: #define INTERVAL_QUERY_RESPONSE 10
! 127: //#define INTERVAL_QUERY_RESPONSE 10
! 128:
! 129: #define ROUTESTATE_NOTJOINED 0 // The group corresponding to route is not joined
! 130: #define ROUTESTATE_JOINED 1 // The group corresponding to route is joined
! 131: #define ROUTESTATE_CHECK_LAST_MEMBER 2 // The router is checking for hosts
! 132:
! 133:
! 134:
! 135: // Linked list of networks...
! 136: struct SubnetList {
! 137: uint32_t subnet_addr;
! 138: uint32_t subnet_mask;
! 139: struct SubnetList* next;
! 140: };
! 141:
! 142: struct IfDesc {
! 143: char Name[IF_NAMESIZE];
! 144: struct in_addr InAdr; /* == 0 for non IP interfaces */
! 145: short Flags;
! 146: short state;
! 147: struct SubnetList* allowednets;
! 148: unsigned int robustness;
! 149: unsigned char threshold; /* ttl limit */
! 150: unsigned int ratelimit;
! 151: unsigned int index;
! 152: };
! 153:
! 154: // Keeps common configuration settings
! 155: struct Config {
! 156: unsigned int robustnessValue;
! 157: unsigned int queryInterval;
! 158: unsigned int queryResponseInterval;
! 159: // Used on startup..
! 160: unsigned int startupQueryInterval;
! 161: unsigned int startupQueryCount;
! 162: // Last member probe...
! 163: unsigned int lastMemberQueryInterval;
! 164: unsigned int lastMemberQueryCount;
! 165: // Set if upstream leave messages should be sent instantly..
! 166: unsigned short fastUpstreamLeave;
! 167: };
! 168:
! 169: // Defines the Index of the upstream VIF...
! 170: extern int upStreamVif;
! 171:
! 172: /* ifvc.c
! 173: */
! 174: void buildIfVc( void );
! 175: struct IfDesc *getIfByName( const char *IfName );
! 176: struct IfDesc *getIfByIx( unsigned Ix );
! 177: struct IfDesc *getIfByAddress( uint32_t Ix );
! 178: int isAdressValidForIf(struct IfDesc* intrface, uint32_t ipaddr);
! 179:
! 180: /* mroute-api.c
! 181: */
! 182: struct MRouteDesc {
! 183: struct in_addr OriginAdr, McAdr;
! 184: short InVif;
! 185: uint8_t TtlVc[ MAX_MC_VIFS ];
! 186: };
! 187:
! 188: // IGMP socket as interface for the mrouted API
! 189: // - receives the IGMP messages
! 190: extern int MRouterFD;
! 191:
! 192: int enableMRouter( void );
! 193: void disableMRouter( void );
! 194: void addVIF( struct IfDesc *Dp );
! 195: int addMRoute( struct MRouteDesc * Dp );
! 196: int delMRoute( struct MRouteDesc * Dp );
! 197: int getVifIx( struct IfDesc *IfDp );
! 198:
! 199: /* config.c
! 200: */
! 201: int loadConfig(char *configFile);
! 202: void configureVifs();
! 203: struct Config *getCommonConfig();
! 204:
! 205: /* igmp.c
! 206: */
! 207: extern uint32_t allhosts_group;
! 208: extern uint32_t allrouters_group;
! 209: void initIgmp(void);
! 210: void acceptIgmp(int);
! 211: void sendIgmp (uint32_t, uint32_t, int, int, uint32_t,int);
! 212:
! 213: /* lib.c
! 214: */
! 215: char *fmtInAdr( char *St, struct in_addr InAdr );
! 216: char *inetFmt(uint32_t addr, char *s);
! 217: char *inetFmts(uint32_t addr, uint32_t mask, char *s);
! 218: uint16_t inetChksum(uint16_t *addr, int len);
! 219:
! 220: /* kern.c
! 221: */
! 222: void k_set_rcvbuf(int bufsize, int minsize);
! 223: void k_hdr_include(int hdrincl);
! 224: void k_set_ttl(int t);
! 225: void k_set_loop(int l);
! 226: void k_set_if(uint32_t ifa);
! 227: /*
! 228: void k_join(uint32_t grp, uint32_t ifa);
! 229: void k_leave(uint32_t grp, uint32_t ifa);
! 230: */
! 231:
! 232: /* udpsock.c
! 233: */
! 234: int openUdpSocket( uint32_t PeerInAdr, uint16_t PeerPort );
! 235:
! 236: /* mcgroup.c
! 237: */
! 238: int joinMcGroup( int UdpSock, struct IfDesc *IfDp, uint32_t mcastaddr );
! 239: int leaveMcGroup( int UdpSock, struct IfDesc *IfDp, uint32_t mcastaddr );
! 240:
! 241:
! 242: /* rttable.c
! 243: */
! 244: void initRouteTable();
! 245: void clearAllRoutes();
! 246: int insertRoute(uint32_t group, int ifx);
! 247: int activateRoute(uint32_t group, uint32_t originAddr);
! 248: void ageActiveRoutes();
! 249: void setRouteLastMemberMode(uint32_t group);
! 250: int lastMemberGroupAge(uint32_t group);
! 251:
! 252: /* request.c
! 253: */
! 254: void acceptGroupReport(uint32_t src, uint32_t group, uint8_t type);
! 255: void acceptLeaveMessage(uint32_t src, uint32_t group);
! 256: void sendGeneralMembershipQuery();
! 257:
! 258: /* callout.c
! 259: */
! 260: typedef void (*timer_f)(void *);
! 261:
! 262: void callout_init();
! 263: void free_all_callouts();
! 264: void age_callout_queue(int);
! 265: int timer_nextTimer();
! 266: int timer_setTimer(int, timer_f, void *);
! 267: int timer_clearTimer(int);
! 268: int timer_leftTimer(int);
! 269:
! 270: /* confread.c
! 271: */
! 272: #define MAX_TOKEN_LENGTH 30
! 273:
! 274: int openConfigFile(char *filename);
! 275: void closeConfigFile();
! 276: char* nextConfigToken();
! 277: char* getCurrentConfigToken();
! 278:
! 279:
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