1c398230bSWarner Losh /*- 2df8bae1dSRodney W. Grimes * Copyright (c) 1982, 1986, 1993 3df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 4df8bae1dSRodney W. Grimes * 5df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 6df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 7df8bae1dSRodney W. Grimes * are met: 8df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 9df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 10df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 11df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 12df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 13df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 14df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 15df8bae1dSRodney W. Grimes * without specific prior written permission. 16df8bae1dSRodney W. Grimes * 17df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27df8bae1dSRodney W. Grimes * SUCH DAMAGE. 28df8bae1dSRodney W. Grimes * 293271ad14SGarrett Wollman * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 30c3aac50fSPeter Wemm * $FreeBSD$ 31df8bae1dSRodney W. Grimes */ 32df8bae1dSRodney W. Grimes 33707f139eSPaul Richards #ifndef _NETINET_IP_VAR_H_ 34707f139eSPaul Richards #define _NETINET_IP_VAR_H_ 35707f139eSPaul Richards 3633841545SHajimu UMEMOTO #include <sys/queue.h> 3733841545SHajimu UMEMOTO 38df8bae1dSRodney W. Grimes /* 39df8bae1dSRodney W. Grimes * Overlay for ip header used by other protocols (tcp, udp). 40df8bae1dSRodney W. Grimes */ 41df8bae1dSRodney W. Grimes struct ipovly { 426effc713SDoug Rabson u_char ih_x1[9]; /* (unused) */ 43df8bae1dSRodney W. Grimes u_char ih_pr; /* protocol */ 44430d30d8SBill Fenner u_short ih_len; /* protocol length */ 45df8bae1dSRodney W. Grimes struct in_addr ih_src; /* source internet address */ 46df8bae1dSRodney W. Grimes struct in_addr ih_dst; /* destination internet address */ 47df8bae1dSRodney W. Grimes }; 48df8bae1dSRodney W. Grimes 4969dac2eaSRobert Watson #ifdef _KERNEL 50df8bae1dSRodney W. Grimes /* 51df8bae1dSRodney W. Grimes * Ip reassembly queue structure. Each fragment 52df8bae1dSRodney W. Grimes * being reassembled is attached to one of these structures. 53df8bae1dSRodney W. Grimes * They are timed out after ipq_ttl drops to 0, and may also 54df8bae1dSRodney W. Grimes * be reclaimed if memory becomes tight. 55df8bae1dSRodney W. Grimes */ 56df8bae1dSRodney W. Grimes struct ipq { 57462b86feSPoul-Henning Kamp TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ 58df8bae1dSRodney W. Grimes u_char ipq_ttl; /* time for reass q to live */ 59df8bae1dSRodney W. Grimes u_char ipq_p; /* protocol of this fragment */ 60df8bae1dSRodney W. Grimes u_short ipq_id; /* sequence id for reassembly */ 616effc713SDoug Rabson struct mbuf *ipq_frags; /* to ip headers of fragments */ 62df8bae1dSRodney W. Grimes struct in_addr ipq_src,ipq_dst; 63375386e2SMike Silbersack u_char ipq_nfrags; /* # frags in this packet */ 64eca8a663SRobert Watson struct label *ipq_label; /* MAC label */ 65df8bae1dSRodney W. Grimes }; 6669dac2eaSRobert Watson #endif /* _KERNEL */ 67df8bae1dSRodney W. Grimes 68df8bae1dSRodney W. Grimes /* 69c444cddeSAndre Oppermann * Structure stored in mbuf in inpcb.ip_options 70c444cddeSAndre Oppermann * and passed to ip_output when ip options are in use. 71c444cddeSAndre Oppermann * The actual length of the options (including ipopt_dst) 72c444cddeSAndre Oppermann * is in m_len. 73c444cddeSAndre Oppermann */ 74c444cddeSAndre Oppermann #define MAX_IPOPTLEN 40 75c444cddeSAndre Oppermann 76c444cddeSAndre Oppermann struct ipoption { 77c444cddeSAndre Oppermann struct in_addr ipopt_dst; /* first-hop dst if source routed */ 78c444cddeSAndre Oppermann char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 79c444cddeSAndre Oppermann }; 80c444cddeSAndre Oppermann 81c444cddeSAndre Oppermann /* 82df8bae1dSRodney W. Grimes * Structure attached to inpcb.ip_moptions and 83df8bae1dSRodney W. Grimes * passed to ip_output when IP multicast options are in use. 8471498f30SBruce M Simpson * This structure is lazy-allocated. 85df8bae1dSRodney W. Grimes */ 86df8bae1dSRodney W. Grimes struct ip_moptions { 87df8bae1dSRodney W. Grimes struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 8833841545SHajimu UMEMOTO struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 893548bfc9SBruce M Simpson u_long imo_multicast_vif; /* vif num outgoing multicasts */ 90df8bae1dSRodney W. Grimes u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 91df8bae1dSRodney W. Grimes u_char imo_multicast_loop; /* 1 => hear sends if a member */ 92df8bae1dSRodney W. Grimes u_short imo_num_memberships; /* no. memberships this socket */ 933548bfc9SBruce M Simpson u_short imo_max_memberships; /* max memberships this socket */ 943548bfc9SBruce M Simpson struct in_multi **imo_membership; /* group memberships */ 9571498f30SBruce M Simpson struct in_mfilter *imo_mfilters; /* source filters */ 96df8bae1dSRodney W. Grimes }; 97df8bae1dSRodney W. Grimes 98df8bae1dSRodney W. Grimes struct ipstat { 99df8bae1dSRodney W. Grimes u_long ips_total; /* total packets received */ 100df8bae1dSRodney W. Grimes u_long ips_badsum; /* checksum bad */ 101df8bae1dSRodney W. Grimes u_long ips_tooshort; /* packet too short */ 102df8bae1dSRodney W. Grimes u_long ips_toosmall; /* not enough data */ 103df8bae1dSRodney W. Grimes u_long ips_badhlen; /* ip header length < data size */ 104df8bae1dSRodney W. Grimes u_long ips_badlen; /* ip length < ip header length */ 105df8bae1dSRodney W. Grimes u_long ips_fragments; /* fragments received */ 106df8bae1dSRodney W. Grimes u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 107df8bae1dSRodney W. Grimes u_long ips_fragtimeout; /* fragments timed out */ 108df8bae1dSRodney W. Grimes u_long ips_forward; /* packets forwarded */ 1091f91d8c5SDavid Greenman u_long ips_fastforward; /* packets fast forwarded */ 110df8bae1dSRodney W. Grimes u_long ips_cantforward; /* packets rcvd for unreachable dest */ 111df8bae1dSRodney W. Grimes u_long ips_redirectsent; /* packets forwarded on same net */ 112df8bae1dSRodney W. Grimes u_long ips_noproto; /* unknown or unsupported protocol */ 113df8bae1dSRodney W. Grimes u_long ips_delivered; /* datagrams delivered to upper level*/ 114df8bae1dSRodney W. Grimes u_long ips_localout; /* total ip packets generated here */ 115df8bae1dSRodney W. Grimes u_long ips_odropped; /* lost packets due to nobufs, etc. */ 116df8bae1dSRodney W. Grimes u_long ips_reassembled; /* total packets reassembled ok */ 1176c5e9bbdSMike Pritchard u_long ips_fragmented; /* datagrams successfully fragmented */ 118df8bae1dSRodney W. Grimes u_long ips_ofragments; /* output fragments created */ 119df8bae1dSRodney W. Grimes u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 120df8bae1dSRodney W. Grimes u_long ips_badoptions; /* error in option processing */ 121df8bae1dSRodney W. Grimes u_long ips_noroute; /* packets discarded due to no route */ 122df8bae1dSRodney W. Grimes u_long ips_badvers; /* ip version != 4 */ 123df8bae1dSRodney W. Grimes u_long ips_rawout; /* total raw ip packets generated */ 124430d30d8SBill Fenner u_long ips_toolong; /* ip length > max ip packet size */ 12582c39223SGarrett Wollman u_long ips_notmember; /* multicasts for unregistered grps */ 12676429de4SYoshinobu Inoue u_long ips_nogif; /* no match gif found */ 12733841545SHajimu UMEMOTO u_long ips_badaddr; /* invalid address on header */ 128df8bae1dSRodney W. Grimes }; 129df8bae1dSRodney W. Grimes 130664a31e4SPeter Wemm #ifdef _KERNEL 1315914e1eaSBruce Evans 132eddfbb76SRobert Watson #include <net/vnet.h> 133eddfbb76SRobert Watson 13486425c62SRobert Watson #define IPSTAT_ADD(name, val) V_ipstat.name += (val) 13586425c62SRobert Watson #define IPSTAT_SUB(name, val) V_ipstat.name -= (val) 13686425c62SRobert Watson #define IPSTAT_INC(name) IPSTAT_ADD(name, 1) 13786425c62SRobert Watson #define IPSTAT_DEC(name) IPSTAT_SUB(name, 1) 13886425c62SRobert Watson 13971498f30SBruce M Simpson /* flags passed to ip_output as last parameter */ 14071498f30SBruce M Simpson #define IP_FORWARDING 0x1 /* most of ip header exists */ 14171498f30SBruce M Simpson #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 14271498f30SBruce M Simpson #define IP_SENDONES 0x4 /* send all-ones broadcast */ 14371498f30SBruce M Simpson #define IP_SENDTOIF 0x8 /* send on specific ifnet */ 144beaa515eSAndre Oppermann #define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */ 145beaa515eSAndre Oppermann #define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */ 146df8bae1dSRodney W. Grimes 147beaa515eSAndre Oppermann /* 148beaa515eSAndre Oppermann * mbuf flag used by ip_fastfwd 149beaa515eSAndre Oppermann */ 150ac9d7e26SMax Laier #define M_FASTFWD_OURS M_PROTO1 /* changed dst to local */ 151ac9d7e26SMax Laier 1522fcb030aSAndrew Thompson #ifdef __NO_STRICT_ALIGNMENT 1532fcb030aSAndrew Thompson #define IP_HDR_ALIGNED_P(ip) 1 1542fcb030aSAndrew Thompson #else 1552fcb030aSAndrew Thompson #define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 1562fcb030aSAndrew Thompson #endif 1572fcb030aSAndrew Thompson 158cfe8b629SGarrett Wollman struct ip; 159ca5d5e73SBruce Evans struct inpcb; 1605e26bd9aSBruce Evans struct route; 161cfe8b629SGarrett Wollman struct sockopt; 1625e26bd9aSBruce Evans 163eddfbb76SRobert Watson VNET_DECLARE(struct ipstat, ipstat); 164eddfbb76SRobert Watson VNET_DECLARE(u_short, ip_id); /* ip packet ctr, for ids */ 165eddfbb76SRobert Watson VNET_DECLARE(int, ip_defttl); /* default IP ttl */ 166eddfbb76SRobert Watson VNET_DECLARE(int, ipforwarding); /* ip forwarding */ 167c76ff708SAndre Oppermann #ifdef IPSTEALTH 168eddfbb76SRobert Watson VNET_DECLARE(int, ipstealth); /* stealth forwarding */ 169c76ff708SAndre Oppermann #endif 170eddfbb76SRobert Watson VNET_DECLARE(int, rsvp_on); 171eddfbb76SRobert Watson VNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/ 172eddfbb76SRobert Watson VNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */ 173eddfbb76SRobert Watson 174eddfbb76SRobert Watson #define V_ipstat VNET_GET(ipstat) 175eddfbb76SRobert Watson #define V_ip_id VNET_GET(ip_id) 176eddfbb76SRobert Watson #define V_ip_defttl VNET_GET(ip_defttl) 177eddfbb76SRobert Watson #define V_ipforwarding VNET_GET(ipforwarding) 178eddfbb76SRobert Watson #ifdef IPSTEALTH 179eddfbb76SRobert Watson #define V_ipstealth VNET_GET(ipstealth) 180eddfbb76SRobert Watson #endif 181eddfbb76SRobert Watson #define V_rsvp_on VNET_GET(rsvp_on) 182eddfbb76SRobert Watson #define V_ip_rsvpd VNET_GET(ip_rsvpd) 183eddfbb76SRobert Watson #define V_ip_mrouter VNET_GET(ip_mrouter) 184115a40c7SLuigi Rizzo 18586413abfSBjoern A. Zeeb extern u_char ip_protox[]; 1864d77a549SAlfred Perlstein extern int (*legal_vif_num)(int); 1874d77a549SAlfred Perlstein extern u_long (*ip_mcast_src)(int); 188117bcae7SGarrett Wollman extern struct pr_usrreqs rip_usrreqs; 189df8bae1dSRodney W. Grimes 19071498f30SBruce M Simpson void inp_freemoptions(struct ip_moptions *); 19171498f30SBruce M Simpson int inp_getmoptions(struct inpcb *, struct sockopt *); 19271498f30SBruce M Simpson int inp_setmoptions(struct inpcb *, struct sockopt *); 19371498f30SBruce M Simpson 1944d77a549SAlfred Perlstein int ip_ctloutput(struct socket *, struct sockopt *sopt); 1954d77a549SAlfred Perlstein void ip_drain(void); 1965f311da2SMike Silbersack void ip_fini(void *xtp); 1971e78ac21SJeffrey Hsu int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 1981e78ac21SJeffrey Hsu u_long if_hwassist_flags, int sw_csum); 199ef39adf0SAndre Oppermann void ip_forward(struct mbuf *m, int srcrt); 2004d77a549SAlfred Perlstein void ip_init(void); 201beaa515eSAndre Oppermann extern int 202beaa515eSAndre Oppermann (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 2034d77a549SAlfred Perlstein struct ip_moptions *); 2044d77a549SAlfred Perlstein int ip_output(struct mbuf *, 2055d846453SSam Leffler struct mbuf *, struct route *, int, struct ip_moptions *, 2065d846453SSam Leffler struct inpcb *); 207de38924dSAndre Oppermann int ipproto_register(u_char); 208de38924dSAndre Oppermann int ipproto_unregister(u_char); 2099b932e9eSAndre Oppermann struct mbuf * 2109b932e9eSAndre Oppermann ip_reass(struct mbuf *); 211bd714208SRuslan Ermilov struct in_ifaddr * 2128b07e49aSJulian Elischer ip_rtaddr(struct in_addr, u_int fibnum); 2134d77a549SAlfred Perlstein void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 2144d77a549SAlfred Perlstein struct mbuf *); 2154d77a549SAlfred Perlstein void ip_slowtimo(void); 2161f44b0a1SDavid Malone u_int16_t ip_randomid(void); 2174d77a549SAlfred Perlstein int rip_ctloutput(struct socket *, struct sockopt *); 2184d77a549SAlfred Perlstein void rip_ctlinput(int, struct sockaddr *, void *); 2194d77a549SAlfred Perlstein void rip_init(void); 220bc29160dSMarko Zec #ifdef VIMAGE 221bc29160dSMarko Zec void rip_destroy(void); 222bc29160dSMarko Zec #endif 2234d77a549SAlfred Perlstein void rip_input(struct mbuf *, int); 2244d77a549SAlfred Perlstein int rip_output(struct mbuf *, struct socket *, u_long); 2254d77a549SAlfred Perlstein void ipip_input(struct mbuf *, int); 2264d77a549SAlfred Perlstein void rsvp_input(struct mbuf *, int); 2274d77a549SAlfred Perlstein int ip_rsvp_init(struct socket *); 2284d77a549SAlfred Perlstein int ip_rsvp_done(void); 229bbb4330bSLuigi Rizzo extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 230bbb4330bSLuigi Rizzo extern void (*ip_rsvp_force_done)(struct socket *); 231bbb4330bSLuigi Rizzo extern void (*rsvp_input_p)(struct mbuf *m, int off); 232bbb4330bSLuigi Rizzo 233c21fd232SAndre Oppermann extern struct pfil_head inet_pfil_hook; /* packet filter hooks */ 234134ea224SSam Leffler 2351c238475SJonathan Lemon void in_delayed_cksum(struct mbuf *m); 2361c238475SJonathan Lemon 237115a40c7SLuigi Rizzo /* ipfw and dummynet hooks. Most are declared in raw_ip.c */ 238115a40c7SLuigi Rizzo struct ip_fw_args; 239115a40c7SLuigi Rizzo extern int (*ip_fw_chk_ptr)(struct ip_fw_args *args); 240115a40c7SLuigi Rizzo extern int (*ip_fw_ctl_ptr)(struct sockopt *); 241115a40c7SLuigi Rizzo extern int (*ip_dn_ctl_ptr)(struct sockopt *); 242115a40c7SLuigi Rizzo extern int (*ip_dn_io_ptr)(struct mbuf **m, int dir, struct ip_fw_args *fwa); 243115a40c7SLuigi Rizzo extern void (*ip_dn_ruledel_ptr)(void *); /* in ip_fw2.c */ 244eddfbb76SRobert Watson 245eddfbb76SRobert Watson VNET_DECLARE(int, ip_do_randomid); 246eddfbb76SRobert Watson #define V_ip_do_randomid VNET_GET(ip_do_randomid) 247eddfbb76SRobert Watson #define ip_newid() ((V_ip_do_randomid != 0) ? ip_randomid() : \ 248eddfbb76SRobert Watson htons(V_ip_id++)) 249eddfbb76SRobert Watson 250664a31e4SPeter Wemm #endif /* _KERNEL */ 251707f139eSPaul Richards 2525914e1eaSBruce Evans #endif /* !_NETINET_IP_VAR_H_ */ 253