diff options
Diffstat (limited to 'contrib/ipfilter/ip_proxy.h')
-rw-r--r-- | contrib/ipfilter/ip_proxy.h | 309 |
1 files changed, 294 insertions, 15 deletions
diff --git a/contrib/ipfilter/ip_proxy.h b/contrib/ipfilter/ip_proxy.h index 50b0559..8e53c98 100644 --- a/contrib/ipfilter/ip_proxy.h +++ b/contrib/ipfilter/ip_proxy.h @@ -1,9 +1,11 @@ +/* $NetBSD$ */ + /* * Copyright (C) 1997-2001 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. * - * $Id: ip_proxy.h,v 2.8.2.14 2002/09/02 12:19:26 darrenr Exp $ + * Id: ip_proxy.h,v 2.31.2.2 2005/03/12 19:33:48 darrenr Exp */ #ifndef __IP_PROXY_H__ @@ -64,6 +66,26 @@ typedef struct ap_session { #define aps_ackmin aps_un.apu_tcp.apt_ackmin +typedef struct ap_control { + char apc_label[APR_LABELLEN]; + u_char apc_p; + /* + * The following fields are upto the proxy's apr_ctl routine to deal + * with. When the proxy gets this in kernel space, apc_data will + * point to a malloc'd region of memory of apc_dsize bytes. If the + * proxy wants to keep that memory, it must set apc_data to NULL + * before it returns. It is expected if this happens that it will + * take care to free it in apr_fini or otherwise as appropriate. + * apc_cmd is provided as a standard place to put simple commands, + * with apc_arg being available to put a simple arg. + */ + u_long apc_cmd; + u_long apc_arg; + void *apc_data; + size_t apc_dsize; +} ap_ctl_t; + + typedef struct aproxy { struct aproxy *apr_next; char apr_label[APR_LABELLEN]; /* Proxy label # */ @@ -72,34 +94,65 @@ typedef struct aproxy { int apr_flags; int (* apr_init) __P((void)); void (* apr_fini) __P((void)); - int (* apr_new) __P((fr_info_t *, ip_t *, - ap_session_t *, struct nat *)); + int (* apr_new) __P((fr_info_t *, ap_session_t *, struct nat *)); void (* apr_del) __P((ap_session_t *)); - int (* apr_inpkt) __P((fr_info_t *, ip_t *, - ap_session_t *, struct nat *)); - int (* apr_outpkt) __P((fr_info_t *, ip_t *, - ap_session_t *, struct nat *)); + int (* apr_inpkt) __P((fr_info_t *, ap_session_t *, struct nat *)); + int (* apr_outpkt) __P((fr_info_t *, ap_session_t *, struct nat *)); int (* apr_match) __P((fr_info_t *, ap_session_t *, struct nat *)); + int (* apr_ctl) __P((struct aproxy *, struct ap_control *)); } aproxy_t; #define APR_DELETE 1 -#define APR_ERR(x) (((x) & 0xffff) << 16) +#define APR_ERR(x) ((x) << 16) #define APR_EXIT(x) (((x) >> 16) & 0xffff) #define APR_INC(x) ((x) & 0xffff) -#define FTP_BUFSZ 160 /* - * For the ftp proxy. + * Generic #define's to cover missing things in the kernel */ +#ifndef isdigit +#define isdigit(x) ((x) >= '0' && (x) <= '9') +#endif +#ifndef isupper +#define isupper(x) (((unsigned)(x) >= 'A') && ((unsigned)(x) <= 'Z')) +#endif +#ifndef islower +#define islower(x) (((unsigned)(x) >= 'a') && ((unsigned)(x) <= 'z')) +#endif +#ifndef isalpha +#define isalpha(x) (isupper(x) || islower(x)) +#endif +#ifndef toupper +#define toupper(x) (isupper(x) ? (x) : (x) - 'a' + 'A') +#endif +#ifndef isspace +#define isspace(x) (((x) == ' ') || ((x) == '\r') || ((x) == '\n') || \ + ((x) == '\t') || ((x) == '\b')) +#endif + +/* + * This is the scratch buffer size used to hold strings from the TCP stream + * that we may want to parse. It's an arbitrary size, really, but it must + * be at least as large as IPF_FTPBUFSZ. + */ +#define FTP_BUFSZ 120 + +/* + * This buffer, however, doesn't need to be nearly so big. It just needs to + * be able to squeeze in the largest command it needs to rewrite, Which ones + * does it rewrite? EPRT, PORT, 227 replies. + */ +#define IPF_FTPBUFSZ 80 /* This *MUST* be >= 53! */ + typedef struct ftpside { char *ftps_rptr; char *ftps_wptr; + void *ftps_ifp; u_32_t ftps_seq[2]; u_32_t ftps_len; - int ftps_junk; + int ftps_junk; /* 2 = no cr/lf yet, 1 = cannot parse */ int ftps_cmds; - int ftps_cmd; char ftps_buf[FTP_BUFSZ]; } ftpside_t; @@ -109,6 +162,22 @@ typedef struct ftpinfo { ftpside_t ftp_side[2]; } ftpinfo_t; + +/* + * For the irc proxy. + */ +typedef struct ircinfo { + size_t irc_len; + char *irc_snick; + char *irc_dnick; + char *irc_type; + char *irc_arg; + char *irc_addr; + u_32_t irc_ipnum; + u_short irc_port; +} ircinfo_t; + + /* * Real audio proxy structure and #defines */ @@ -140,6 +209,19 @@ typedef struct raudio_s { #define RAP_M_TCP 4 #define RAP_M_UDP_ROBUST (RAP_M_UDP|RAP_M_ROBUST) + +/* + * MSN RPC proxy + */ +typedef struct msnrpcinfo { + u_int mri_flags; + int mri_cmd[2]; + u_int mri_valid; + struct in_addr mri_raddr; + u_short mri_rport; +} msnrpcinfo_t; + + /* * IPSec proxy */ @@ -154,21 +236,218 @@ typedef struct ipsec_pxy { ipstate_t *ipsc_state; } ipsec_pxy_t; +/* + * PPTP proxy + */ +typedef struct pptp_side { + u_32_t pptps_nexthdr; + u_32_t pptps_next; + int pptps_state; + int pptps_gothdr; + int pptps_len; + int pptps_bytes; + char *pptps_wptr; + char pptps_buffer[512]; +} pptp_side_t; + +typedef struct pptp_pxy { + ipnat_t pptp_rule; + nat_t *pptp_nat; + ipstate_t *pptp_state; + u_short pptp_call[2]; + pptp_side_t pptp_side[2]; +} pptp_pxy_t; + + +/* + * Sun RPCBIND proxy + */ +#define RPCB_MAXMSG 888 +#define RPCB_RES_PMAP 0 /* Response contains a v2 port. */ +#define RPCB_RES_STRING 1 /* " " " v3 (GETADDR) string. */ +#define RPCB_RES_LIST 2 /* " " " v4 (GETADDRLIST) list. */ +#define RPCB_MAXREQS 32 /* Arbitrary limit on tracked transactions */ + +#define RPCB_REQMIN 40 +#define RPCB_REQMAX 888 +#define RPCB_REPMIN 20 +#define RPCB_REPMAX 604 /* XXX double check this! */ + +/* + * These macros determine the number of bytes between p and the end of + * r->rs_buf relative to l. + */ +#define RPCB_BUF_END(r) (char *)((r)->rm_msgbuf + (r)->rm_buflen) +#define RPCB_BUF_GEQ(r, p, l) \ + ((RPCB_BUF_END((r)) > (char *)(p)) && \ + ((RPCB_BUF_END((r)) - (char *)(p)) >= (l))) +#define RPCB_BUF_EQ(r, p, l) \ + (RPCB_BUF_END((r)) == ((char *)(p) + (l))) + +/* + * The following correspond to RPC(B) detailed in RFC183[13]. + */ +#define RPCB_CALL 0 +#define RPCB_REPLY 1 +#define RPCB_MSG_VERSION 2 +#define RPCB_PROG 100000 +#define RPCB_GETPORT 3 +#define RPCB_GETADDR 3 +#define RPCB_GETADDRLIST 11 +#define RPCB_MSG_ACCEPTED 0 +#define RPCB_MSG_DENIED 1 + +/* BEGIN (Generic XDR structures) */ +typedef struct xdr_string { + u_32_t *xs_len; + char *xs_str; +} xdr_string_t; + +typedef struct xdr_auth { + /* u_32_t xa_flavor; */ + xdr_string_t xa_string; +} xdr_auth_t; + +typedef struct xdr_uaddr { + u_32_t xu_ip; + u_short xu_port; + xdr_string_t xu_str; +} xdr_uaddr_t; + +typedef struct xdr_proto { + u_int xp_proto; + xdr_string_t xp_str; +} xdr_proto_t; + +#define xu_xslen xu_str.xs_len +#define xu_xsstr xu_str.xs_str +#define xp_xslen xp_str.xs_len +#define xp_xsstr xp_str.xs_str +/* END (Generic XDR structures) */ + +/* BEGIN (RPC call structures) */ +typedef struct pmap_args { + /* u_32_t pa_prog; */ + /* u_32_t pa_vers; */ + u_32_t *pa_prot; + /* u_32_t pa_port; */ +} pmap_args_t; + +typedef struct rpcb_args { + /* u_32_t *ra_prog; */ + /* u_32_t *ra_vers; */ + xdr_proto_t ra_netid; + xdr_uaddr_t ra_maddr; + /* xdr_string_t ra_owner; */ +} rpcb_args_t; + +typedef struct rpc_call { + /* u_32_t rc_rpcvers; */ + /* u_32_t rc_prog; */ + u_32_t *rc_vers; + u_32_t *rc_proc; + xdr_auth_t rc_authcred; + xdr_auth_t rc_authverf; + union { + pmap_args_t ra_pmapargs; + rpcb_args_t ra_rpcbargs; + } rpcb_args; +} rpc_call_t; + +#define rc_pmapargs rpcb_args.ra_pmapargs +#define rc_rpcbargs rpcb_args.ra_rpcbargs +/* END (RPC call structures) */ + +/* BEGIN (RPC reply structures) */ +typedef struct rpcb_entry { + xdr_uaddr_t re_maddr; + xdr_proto_t re_netid; + /* u_32_t re_semantics; */ + xdr_string_t re_family; + xdr_proto_t re_proto; + u_32_t *re_more; /* 1 == another entry follows */ +} rpcb_entry_t; + +typedef struct rpcb_listp { + u_32_t *rl_list; /* 1 == list follows */ + int rl_cnt; + rpcb_entry_t rl_entries[2]; /* TCP / UDP only */ +} rpcb_listp_t; + +typedef struct rpc_resp { + /* u_32_t rr_acceptdeny; */ + /* Omitted 'message denied' fork; we don't care about rejects. */ + xdr_auth_t rr_authverf; + /* u_32_t *rr_astat; */ + union { + u_32_t *resp_pmap; + xdr_uaddr_t resp_getaddr; + rpcb_listp_t resp_getaddrlist; + } rpcb_reply; +} rpc_resp_t; + +#define rr_v2 rpcb_reply.resp_pmap +#define rr_v3 rpcb_reply.resp_getaddr +#define rr_v4 rpcb_reply.resp_getaddrlist +/* END (RPC reply structures) */ + +/* BEGIN (RPC message structure & macros) */ +typedef struct rpc_msg { + char rm_msgbuf[RPCB_MAXMSG]; /* RPCB data buffer */ + u_int rm_buflen; + u_32_t *rm_xid; + /* u_32_t Call vs Reply */ + union { + rpc_call_t rb_call; + rpc_resp_t rb_resp; + } rm_body; +} rpc_msg_t; + +#define rm_call rm_body.rb_call +#define rm_resp rm_body.rb_resp +/* END (RPC message structure & macros) */ + +/* + * These code paths aren't hot enough to warrant per transaction + * mutexes. + */ +typedef struct rpcb_xact { + struct rpcb_xact *rx_next; + struct rpcb_xact **rx_pnext; + u_32_t rx_xid; /* RPC transmission ID */ + u_int rx_type; /* RPCB response type */ + u_int rx_ref; /* reference count */ + u_int rx_proto; /* transport protocol (v2 only) */ +} rpcb_xact_t; + +typedef struct rpcb_session { + ipfmutex_t rs_rxlock; + rpcb_xact_t *rs_rxlist; +} rpcb_session_t; + +/* + * For an explanation, please see the following: + * RFC1832 - Sections 3.11, 4.4, and 4.5. + */ +#define XDRALIGN(x) ((((x) % 4) != 0) ? ((((x) + 3) / 4) * 4) : (x)) + extern ap_session_t *ap_sess_tab[AP_SESS_SIZE]; extern ap_session_t *ap_sess_list; extern aproxy_t ap_proxies[]; extern int ippr_ftp_pasvonly; extern int appr_add __P((aproxy_t *)); +extern int appr_ctl __P((ap_ctl_t *)); extern int appr_del __P((aproxy_t *)); extern int appr_init __P((void)); extern void appr_unload __P((void)); -extern int appr_ok __P((ip_t *, tcphdr_t *, struct ipnat *)); +extern int appr_ok __P((fr_info_t *, tcphdr_t *, struct ipnat *)); extern int appr_match __P((fr_info_t *, struct nat *)); extern void appr_free __P((aproxy_t *)); extern void aps_free __P((ap_session_t *)); -extern int appr_check __P((ip_t *, fr_info_t *, struct nat *)); +extern int appr_check __P((fr_info_t *, struct nat *)); extern aproxy_t *appr_lookup __P((u_int, char *)); -extern int appr_new __P((fr_info_t *, ip_t *, struct nat *)); +extern int appr_new __P((fr_info_t *, struct nat *)); +extern int appr_ioctl __P((caddr_t, ioctlcmd_t, int)); #endif /* __IP_PROXY_H__ */ |