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Diffstat (limited to 'freebsd/sys/netinet/ip_var.h')
| -rw-r--r-- | freebsd/sys/netinet/ip_var.h | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/freebsd/sys/netinet/ip_var.h b/freebsd/sys/netinet/ip_var.h new file mode 100644 index 00000000..2902174d --- /dev/null +++ b/freebsd/sys/netinet/ip_var.h @@ -0,0 +1,315 @@ +/*- + * Copyright (c) 1982, 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 + * $FreeBSD$ + */ + +#ifndef _NETINET_IP_VAR_HH_ +#define _NETINET_IP_VAR_HH_ + +#include <freebsd/sys/queue.h> + +/* + * Overlay for ip header used by other protocols (tcp, udp). + */ +struct ipovly { + u_char ih_x1[9]; /* (unused) */ + u_char ih_pr; /* protocol */ + u_short ih_len; /* protocol length */ + struct in_addr ih_src; /* source internet address */ + struct in_addr ih_dst; /* destination internet address */ +}; + +#ifdef _KERNEL +/* + * Ip reassembly queue structure. Each fragment + * being reassembled is attached to one of these structures. + * They are timed out after ipq_ttl drops to 0, and may also + * be reclaimed if memory becomes tight. + */ +struct ipq { + TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ + u_char ipq_ttl; /* time for reass q to live */ + u_char ipq_p; /* protocol of this fragment */ + u_short ipq_id; /* sequence id for reassembly */ + struct mbuf *ipq_frags; /* to ip headers of fragments */ + struct in_addr ipq_src,ipq_dst; + u_char ipq_nfrags; /* # frags in this packet */ + struct label *ipq_label; /* MAC label */ +}; +#endif /* _KERNEL */ + +/* + * Structure stored in mbuf in inpcb.ip_options + * and passed to ip_output when ip options are in use. + * The actual length of the options (including ipopt_dst) + * is in m_len. + */ +#define MAX_IPOPTLEN 40 + +struct ipoption { + struct in_addr ipopt_dst; /* first-hop dst if source routed */ + char ipopt_list[MAX_IPOPTLEN]; /* options proper */ +}; + +/* + * Structure attached to inpcb.ip_moptions and + * passed to ip_output when IP multicast options are in use. + * This structure is lazy-allocated. + */ +struct ip_moptions { + struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ + struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ + u_long imo_multicast_vif; /* vif num outgoing multicasts */ + u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ + u_char imo_multicast_loop; /* 1 => hear sends if a member */ + u_short imo_num_memberships; /* no. memberships this socket */ + u_short imo_max_memberships; /* max memberships this socket */ + struct in_multi **imo_membership; /* group memberships */ + struct in_mfilter *imo_mfilters; /* source filters */ +}; + +struct ipstat { + u_long ips_total; /* total packets received */ + u_long ips_badsum; /* checksum bad */ + u_long ips_tooshort; /* packet too short */ + u_long ips_toosmall; /* not enough data */ + u_long ips_badhlen; /* ip header length < data size */ + u_long ips_badlen; /* ip length < ip header length */ + u_long ips_fragments; /* fragments received */ + u_long ips_fragdropped; /* frags dropped (dups, out of space) */ + u_long ips_fragtimeout; /* fragments timed out */ + u_long ips_forward; /* packets forwarded */ + u_long ips_fastforward; /* packets fast forwarded */ + u_long ips_cantforward; /* packets rcvd for unreachable dest */ + u_long ips_redirectsent; /* packets forwarded on same net */ + u_long ips_noproto; /* unknown or unsupported protocol */ + u_long ips_delivered; /* datagrams delivered to upper level*/ + u_long ips_localout; /* total ip packets generated here */ + u_long ips_odropped; /* lost packets due to nobufs, etc. */ + u_long ips_reassembled; /* total packets reassembled ok */ + u_long ips_fragmented; /* datagrams successfully fragmented */ + u_long ips_ofragments; /* output fragments created */ + u_long ips_cantfrag; /* don't fragment flag was set, etc. */ + u_long ips_badoptions; /* error in option processing */ + u_long ips_noroute; /* packets discarded due to no route */ + u_long ips_badvers; /* ip version != 4 */ + u_long ips_rawout; /* total raw ip packets generated */ + u_long ips_toolong; /* ip length > max ip packet size */ + u_long ips_notmember; /* multicasts for unregistered grps */ + u_long ips_nogif; /* no match gif found */ + u_long ips_badaddr; /* invalid address on header */ +}; + +#ifdef _KERNEL + +#include <freebsd/net/vnet.h> + +/* + * In-kernel consumers can use these accessor macros directly to update + * stats. + */ +#define IPSTAT_ADD(name, val) V_ipstat.name += (val) +#define IPSTAT_SUB(name, val) V_ipstat.name -= (val) +#define IPSTAT_INC(name) IPSTAT_ADD(name, 1) +#define IPSTAT_DEC(name) IPSTAT_SUB(name, 1) + +/* + * Kernel module consumers must use this accessor macro. + */ +void kmod_ipstat_inc(int statnum); +#define KMOD_IPSTAT_INC(name) \ + kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(u_long)) +void kmod_ipstat_dec(int statnum); +#define KMOD_IPSTAT_DEC(name) \ + kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(u_long)) + +/* flags passed to ip_output as last parameter */ +#define IP_FORWARDING 0x1 /* most of ip header exists */ +#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ +#define IP_SENDONES 0x4 /* send all-ones broadcast */ +#define IP_SENDTOIF 0x8 /* send on specific ifnet */ +#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */ +#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */ + +/* + * mbuf flag used by ip_fastfwd + */ +#define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */ + +#ifdef __NO_STRICT_ALIGNMENT +#define IP_HDR_ALIGNED_P(ip) 1 +#else +#define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) +#endif + +struct ip; +struct inpcb; +struct route; +struct sockopt; + +VNET_DECLARE(struct ipstat, ipstat); +VNET_DECLARE(u_short, ip_id); /* ip packet ctr, for ids */ +VNET_DECLARE(int, ip_defttl); /* default IP ttl */ +VNET_DECLARE(int, ipforwarding); /* ip forwarding */ +#ifdef IPSTEALTH +VNET_DECLARE(int, ipstealth); /* stealth forwarding */ +#endif +extern u_char ip_protox[]; +VNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/ +VNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */ +extern int (*legal_vif_num)(int); +extern u_long (*ip_mcast_src)(int); +VNET_DECLARE(int, rsvp_on); +extern struct pr_usrreqs rip_usrreqs; + +#define V_ipstat VNET(ipstat) +#define V_ip_id VNET(ip_id) +#define V_ip_defttl VNET(ip_defttl) +#define V_ipforwarding VNET(ipforwarding) +#ifdef IPSTEALTH +#define V_ipstealth VNET(ipstealth) +#endif +#define V_ip_rsvpd VNET(ip_rsvpd) +#define V_ip_mrouter VNET(ip_mrouter) +#define V_rsvp_on VNET(rsvp_on) + +void inp_freemoptions(struct ip_moptions *); +int inp_getmoptions(struct inpcb *, struct sockopt *); +int inp_setmoptions(struct inpcb *, struct sockopt *); + +int ip_ctloutput(struct socket *, struct sockopt *sopt); +void ip_drain(void); +void ip_fini(void *xtp); +int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, + u_long if_hwassist_flags, int sw_csum); +void ip_forward(struct mbuf *m, int srcrt); +void ip_init(void); +#ifdef VIMAGE +void ip_destroy(void); +#endif +extern int + (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, + struct ip_moptions *); +int ip_output(struct mbuf *, + struct mbuf *, struct route *, int, struct ip_moptions *, + struct inpcb *); +int ipproto_register(short); +int ipproto_unregister(short); +struct mbuf * + ip_reass(struct mbuf *); +struct in_ifaddr * + ip_rtaddr(struct in_addr, u_int fibnum); +void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, + struct mbuf *); +void ip_slowtimo(void); +u_int16_t ip_randomid(void); +int rip_ctloutput(struct socket *, struct sockopt *); +void rip_ctlinput(int, struct sockaddr *, void *); +void rip_init(void); +#ifdef VIMAGE +void rip_destroy(void); +#endif +void rip_input(struct mbuf *, int); +int rip_output(struct mbuf *, struct socket *, u_long); +void ipip_input(struct mbuf *, int); +void rsvp_input(struct mbuf *, int); +int ip_rsvp_init(struct socket *); +int ip_rsvp_done(void); +extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); +extern void (*ip_rsvp_force_done)(struct socket *); +extern void (*rsvp_input_p)(struct mbuf *m, int off); + +VNET_DECLARE(struct pfil_head, inet_pfil_hook); /* packet filter hooks */ +#define V_inet_pfil_hook VNET(inet_pfil_hook) + +void in_delayed_cksum(struct mbuf *m); + +/* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */ +/* + * Reference to an ipfw or packet filter rule that can be carried + * outside critical sections. + * A rule is identified by rulenum:rule_id which is ordered. + * In version chain_id the rule can be found in slot 'slot', so + * we don't need a lookup if chain_id == chain->id. + * + * On exit from the firewall this structure refers to the rule after + * the matching one (slot points to the new rule; rulenum:rule_id-1 + * is the matching rule), and additional info (e.g. info often contains + * the insn argument or tablearg in the low 16 bits, in host format). + * On entry, the structure is valid if slot>0, and refers to the starting + * rules. 'info' contains the reason for reinject, e.g. divert port, + * divert direction, and so on. + */ +struct ipfw_rule_ref { + uint32_t slot; /* slot for matching rule */ + uint32_t rulenum; /* matching rule number */ + uint32_t rule_id; /* matching rule id */ + uint32_t chain_id; /* ruleset id */ + uint32_t info; /* see below */ +}; + +enum { + IPFW_INFO_MASK = 0x0000ffff, + IPFW_INFO_OUT = 0x00000000, /* outgoing, just for convenience */ + IPFW_INFO_IN = 0x80000000, /* incoming, overloads dir */ + IPFW_ONEPASS = 0x40000000, /* One-pass, do not reinject */ + IPFW_IS_MASK = 0x30000000, /* which source ? */ + IPFW_IS_DIVERT = 0x20000000, + IPFW_IS_DUMMYNET =0x10000000, + IPFW_IS_PIPE = 0x08000000, /* pip1=1, queue = 0 */ +}; +#define MTAG_IPFW 1148380143 /* IPFW-tagged cookie */ +#define MTAG_IPFW_RULE 1262273568 /* rule reference */ + +struct ip_fw_args; +typedef int (*ip_fw_chk_ptr_t)(struct ip_fw_args *args); +typedef int (*ip_fw_ctl_ptr_t)(struct sockopt *); +VNET_DECLARE(ip_fw_chk_ptr_t, ip_fw_chk_ptr); +VNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr); +#define V_ip_fw_chk_ptr VNET(ip_fw_chk_ptr) +#define V_ip_fw_ctl_ptr VNET(ip_fw_ctl_ptr) + +/* Divert hooks. */ +extern void (*ip_divert_ptr)(struct mbuf *m, int incoming); +/* ng_ipfw hooks -- XXX make it the same as divert and dummynet */ +extern int (*ng_ipfw_input_p)(struct mbuf **, int, + struct ip_fw_args *, int); + +extern int (*ip_dn_ctl_ptr)(struct sockopt *); +extern int (*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *); + +VNET_DECLARE(int, ip_do_randomid); +#define V_ip_do_randomid VNET(ip_do_randomid) +#define ip_newid() ((V_ip_do_randomid != 0) ? ip_randomid() : \ + htons(V_ip_id++)) + +#endif /* _KERNEL */ + +#endif /* !_NETINET_IP_VAR_HH_ */ |