diff options
Diffstat (limited to 'sys/netinet/libalias/alias_nbt.c')
| -rw-r--r-- | sys/netinet/libalias/alias_nbt.c | 138 |
1 files changed, 129 insertions, 9 deletions
diff --git a/sys/netinet/libalias/alias_nbt.c b/sys/netinet/libalias/alias_nbt.c index 303cf3f..0d17870 100644 --- a/sys/netinet/libalias/alias_nbt.c +++ b/sys/netinet/libalias/alias_nbt.c @@ -43,27 +43,147 @@ __FBSDID("$FreeBSD$"); /* Includes */ #ifdef _KERNEL #include <sys/param.h> -#include <sys/ctype.h> -#include <sys/libkern.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> #else +#include <errno.h> #include <sys/types.h> -#include <ctype.h> #include <stdio.h> -#include <string.h> -#include <arpa/inet.h> #endif #include <netinet/in_systm.h> #include <netinet/in.h> #include <netinet/ip.h> #include <netinet/udp.h> -#include <netinet/tcp.h> #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 NETBIOS_NS_PORT_NUMBER 137 +#define NETBIOS_DGM_PORT_NUMBER 138 + +static int +AliasHandleUdpNbt(struct libalias *, struct ip *, struct alias_link *, + struct in_addr *, u_short); + +static int +AliasHandleUdpNbtNS(struct libalias *, struct ip *, struct alias_link *, + struct in_addr *, u_short *, struct in_addr *, u_short *); +static int +fingerprint1(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + if (ah->dport == NULL || ah->sport == NULL || ah->lnk == NULL || + ah->aaddr == NULL || ah->aport == NULL) + return (-1); + if (ntohs(*ah->dport) == NETBIOS_DGM_PORT_NUMBER + || ntohs(*ah->sport) == NETBIOS_DGM_PORT_NUMBER) + return (0); + return (-1); +} + +static int +protohandler1(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + AliasHandleUdpNbt(la, pip, ah->lnk, ah->aaddr, *ah->aport); + return (0); +} + +static int +fingerprint2(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + if (ah->dport == NULL || ah->sport == NULL || ah->lnk == NULL || + ah->aaddr == NULL || ah->aport == NULL) + return (-1); + if (ntohs(*ah->dport) == NETBIOS_NS_PORT_NUMBER + || ntohs(*ah->sport) == NETBIOS_NS_PORT_NUMBER) + return (0); + return (-1); +} + +static int +protohandler2in(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + AliasHandleUdpNbtNS(la, pip, ah->lnk, ah->aaddr, ah->aport, + ah->oaddr, ah->dport); + return (0); +} + +static int +protohandler2out(struct libalias *la, struct ip *pip, struct alias_data *ah) +{ + + AliasHandleUdpNbtNS(la, pip, ah->lnk, &pip->ip_src, ah->sport, + ah->aaddr, ah->aport); + return (0); +} + +/* Kernel module definition. */ +struct proto_handler handlers[] = { + { + .pri = 130, + .dir = IN|OUT, + .proto = UDP, + .fingerprint = &fingerprint1, + .protohandler = &protohandler1 + }, + { + .pri = 140, + .dir = IN, + .proto = UDP, + .fingerprint = &fingerprint2, + .protohandler = &protohandler2in + }, + { + .pri = 140, + .dir = OUT, + .proto = UDP, + .fingerprint = &fingerprint2, + .protohandler = &protohandler2out + }, + { 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_nbt", mod_handler, NULL +}; + +#ifdef _KERNEL +DECLARE_MODULE(alias_nbt, alias_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND); +MODULE_VERSION(alias_nbt, 1); +MODULE_DEPEND(alias_nbt, libalias, 1, 1, 1); #endif typedef struct { @@ -212,7 +332,7 @@ AliasHandleName(u_char * p, char *pmax) #define DGM_POSITIVE_RES 0x15 #define DGM_NEGATIVE_RES 0x16 -int +static int AliasHandleUdpNbt( struct libalias *la, struct ip *pip, /* IP packet to examine/patch */ @@ -640,7 +760,7 @@ AliasHandleResource( return ((u_char *) q); } -int +static int AliasHandleUdpNbtNS( struct libalias *la, struct ip *pip, /* IP packet to examine/patch */ |
