| alias_dummy.c (190841) | alias_dummy.c (259858) |
|---|---|
| 1/*- 2 * Copyright (c) 2005 Paolo Pisati <piso@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2005 Paolo Pisati <piso@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> |
| 28__FBSDID("$FreeBSD: head/sys/netinet/libalias/alias_dummy.c 190841 2009-04-08 11:56:49Z piso $"); | 28__FBSDID("$FreeBSD: head/sys/netinet/libalias/alias_dummy.c 259858 2013-12-25 02:06:57Z glebius $"); |
| 29 | 29 |
| 30/* | 30/* |
| 31 * Alias_dummy is just an empty skeleton used to demostrate how to write 32 * a module for libalias, that will run unalterated in userland or in 33 * kernel land. 34 */ 35 36#ifdef _KERNEL 37#include <sys/param.h> 38#include <sys/kernel.h> --- 15 unchanged lines hidden (view full) --- 54#else 55#include "alias_local.h" 56#include "alias_mod.h" 57#endif 58 59static void 60AliasHandleDummy(struct libalias *la, struct ip *ip, struct alias_data *ah); 61 | 31 * Alias_dummy is just an empty skeleton used to demostrate how to write 32 * a module for libalias, that will run unalterated in userland or in 33 * kernel land. 34 */ 35 36#ifdef _KERNEL 37#include <sys/param.h> 38#include <sys/kernel.h> --- 15 unchanged lines hidden (view full) --- 54#else 55#include "alias_local.h" 56#include "alias_mod.h" 57#endif 58 59static void 60AliasHandleDummy(struct libalias *la, struct ip *ip, struct alias_data *ah); 61 |
| 62static int | 62static int |
| 63fingerprint(struct libalias *la, struct alias_data *ah) 64{ 65 | 63fingerprint(struct libalias *la, struct alias_data *ah) 64{ 65 |
| 66 /* 67 * Check here all the data that will be used later, if any field | 66 /* 67 * Check here all the data that will be used later, if any field |
| 68 * is empy/NULL, return a -1 value. 69 */ | 68 * is empy/NULL, return a -1 value. 69 */ |
| 70 if (ah->dport == NULL || ah->sport == NULL || ah->lnk == NULL || | 70 if (ah->dport == NULL || ah->sport == NULL || ah->lnk == NULL || |
| 71 ah->maxpktsize == 0) 72 return (-1); | 71 ah->maxpktsize == 0) 72 return (-1); |
| 73 /* 74 * Fingerprint the incoming packet, if it matches any conditions | 73 /* 74 * Fingerprint the incoming packet, if it matches any conditions |
| 75 * return an OK value. 76 */ 77 if (ntohs(*ah->dport) == 123 78 || ntohs(*ah->sport) == 456) 79 return (0); /* I know how to handle it. */ 80 return (-1); /* I don't recognize this packet. */ 81} 82 | 75 * return an OK value. 76 */ 77 if (ntohs(*ah->dport) == 123 78 || ntohs(*ah->sport) == 456) 79 return (0); /* I know how to handle it. */ 80 return (-1); /* I don't recognize this packet. */ 81} 82 |
| 83/* 84 * Wrap in this general purpose function, the real function used to alias the | 83/* 84 * Wrap in this general purpose function, the real function used to alias the |
| 85 * packets. 86 */ 87 | 85 * packets. 86 */ 87 |
| 88static int | 88static int |
| 89protohandler(struct libalias *la, struct ip *pip, struct alias_data *ah) 90{ 91 92 AliasHandleDummy(la, pip, ah); 93 return (0); 94} 95 | 89protohandler(struct libalias *la, struct ip *pip, struct alias_data *ah) 90{ 91 92 AliasHandleDummy(la, pip, ah); 93 return (0); 94} 95 |
| 96/* 97 * NOTA BENE: the next variable MUST NOT be renamed in any case if you want 98 * your module to work in userland, cause it's used to find and use all | 96/* 97 * NOTA BENE: the next variable MUST NOT be renamed in any case if you want 98 * your module to work in userland, cause it's used to find and use all |
| 99 * the protocol handlers present in every module. | 99 * the protocol handlers present in every module. |
| 100 * So WATCH OUT, your module needs this variables and it needs it with | 100 * So WATCH OUT, your module needs this variables and it needs it with |
| 101 * ITS EXACT NAME: handlers. 102 */ 103 104struct proto_handler handlers [] = { | 101 * ITS EXACT NAME: handlers. 102 */ 103 104struct proto_handler handlers [] = { |
| 105 { 106 .pri = 666, 107 .dir = IN|OUT, 108 .proto = UDP|TCP, 109 .fingerprint = &fingerprint, | 105 { 106 .pri = 666, 107 .dir = IN|OUT, 108 .proto = UDP|TCP, 109 .fingerprint = &fingerprint, |
| 110 .protohandler = &protohandler | 110 .protohandler = &protohandler |
| 111 }, | 111 }, |
| 112 { EOH } 113}; 114 115static int 116mod_handler(module_t mod, int type, void *data) 117{ 118 int error; 119 | 112 { EOH } 113}; 114 115static int 116mod_handler(module_t mod, int type, void *data) 117{ 118 int error; 119 |
| 120 switch (type) { | 120 switch (type) { |
| 121 case MOD_LOAD: 122 error = 0; 123 LibAliasAttachHandlers(handlers); 124 break; 125 case MOD_UNLOAD: 126 error = 0; 127 LibAliasDetachHandlers(handlers); 128 break; --- 25 unchanged lines hidden --- | 121 case MOD_LOAD: 122 error = 0; 123 LibAliasAttachHandlers(handlers); 124 break; 125 case MOD_UNLOAD: 126 error = 0; 127 LibAliasDetachHandlers(handlers); 128 break; --- 25 unchanged lines hidden --- |