diff options
Diffstat (limited to 'sys/netinet/libalias/alias_cuseeme.c')
-rw-r--r-- | sys/netinet/libalias/alias_cuseeme.c | 99 |
1 files changed, 97 insertions, 2 deletions
diff --git a/sys/netinet/libalias/alias_cuseeme.c b/sys/netinet/libalias/alias_cuseeme.c index 171a6f9..f255942 100644 --- a/sys/netinet/libalias/alias_cuseeme.c +++ b/sys/netinet/libalias/alias_cuseeme.c @@ -31,7 +31,10 @@ __FBSDID("$FreeBSD$"); #ifdef _KERNEL #include <sys/param.h> +#include <sys/kernel.h> +#include <sys/module.h> #else +#include <errno.h> #include <sys/types.h> #include <stdio.h> #endif @@ -44,8 +47,100 @@ __FBSDID("$FreeBSD$"); #ifdef _KERNEL #include <netinet/libalias/alias.h> #include <netinet/libalias/alias_local.h> +#include <netinet/libalias/alias_mod.h> #else #include "alias_local.h" +#include "alias_mod.h" +#endif + +#define CUSEEME_PORT_NUMBER 7648 + +static void +AliasHandleCUSeeMeOut(struct libalias *la, struct ip *pip, + struct alias_link *lnk); + +static void +AliasHandleCUSeeMeIn(struct libalias *la, struct ip *pip, + struct in_addr original_addr); + +static int +fingerprint(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + if (ah->dport == NULL || ah->oaddr == NULL) + return (-1); + if (ntohs(*ah->dport) == CUSEEME_PORT_NUMBER) + return (0); + return (-1); +} + +static int +protohandlerin(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + AliasHandleCUSeeMeIn(la, pip, *ah->oaddr); + return (0); +} + +static int +protohandlerout(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + AliasHandleCUSeeMeOut(la, pip, ah->lnk); + return (0); +} + +/* Kernel module definition. */ +struct proto_handler handlers[] = { + { + .pri = 120, + .dir = OUT, + .proto = UDP, + .fingerprint = &fingerprint, + .protohandler = &protohandlerout + }, + { + .pri = 120, + .dir = IN, + .proto = UDP, + .fingerprint = &fingerprint, + .protohandler = &protohandlerin + }, + { EOH } +}; + +static int +mod_handler(module_t mod, int type, void *data) +{ + int error; + + switch (type) { + case MOD_LOAD: + error = 0; + LibAliasAttachHandlers(handlers); + break; + case MOD_UNLOAD: + error = 0; + LibAliasDetachHandlers(handlers); + break; + default: + error = EINVAL; + } + return (error); +} + +#ifdef _KERNEL +static +#endif +moduledata_t +alias_mod = { + "alias_cuseeme", mod_handler, NULL +}; + +#ifdef _KERNEL +DECLARE_MODULE(alias_cuseeme, alias_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND); +MODULE_VERSION(alias_cuseeme, 1); +MODULE_DEPEND(alias_cuseeme, libalias, 1, 1, 1); #endif /* CU-SeeMe Data Header */ @@ -77,7 +172,7 @@ struct client_info { * counts etc */ }; -void +static void AliasHandleCUSeeMeOut(struct libalias *la, struct ip *pip, struct alias_link *lnk) { struct udphdr *ud = ip_next(pip); @@ -100,7 +195,7 @@ AliasHandleCUSeeMeOut(struct libalias *la, struct ip *pip, struct alias_link *ln } } -void +static void AliasHandleCUSeeMeIn(struct libalias *la, struct ip *pip, struct in_addr original_addr) { struct in_addr alias_addr; |