Annotation of sys/net/raw_cb.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: raw_cb.c,v 1.5 2003/12/10 07:22:42 itojun Exp $ */
2: /* $NetBSD: raw_cb.c,v 1.9 1996/02/13 22:00:39 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1980, 1986, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93
33: */
34:
35: #include <sys/param.h>
36: #include <sys/systm.h>
37: #include <sys/mbuf.h>
38: #include <sys/socket.h>
39: #include <sys/socketvar.h>
40: #include <sys/domain.h>
41: #include <sys/protosw.h>
42: #include <sys/errno.h>
43:
44: #include <net/if.h>
45: #include <net/route.h>
46: #include <net/raw_cb.h>
47: #include <netinet/in.h>
48:
49: /*
50: * Routines to manage the raw protocol control blocks.
51: *
52: * TODO:
53: * hash lookups by protocol family/protocol + address family
54: * take care of unique address problems per AF?
55: * redo address binding to allow wildcards
56: */
57:
58: u_long raw_sendspace = RAWSNDQ;
59: u_long raw_recvspace = RAWRCVQ;
60: struct rawcbhead rawcb;
61:
62: /*
63: * Allocate a control block and a nominal amount
64: * of buffer space for the socket.
65: */
66: int
67: raw_attach(so, proto)
68: struct socket *so;
69: int proto;
70: {
71: struct rawcb *rp = sotorawcb(so);
72: int error;
73:
74: /*
75: * It is assumed that raw_attach is called
76: * after space has been allocated for the
77: * rawcb.
78: */
79: if (rp == 0)
80: return (ENOBUFS);
81: if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
82: return (error);
83: rp->rcb_socket = so;
84: rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
85: rp->rcb_proto.sp_protocol = proto;
86: LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
87: return (0);
88: }
89:
90: /*
91: * Detach the raw connection block and discard
92: * socket resources.
93: */
94: void
95: raw_detach(rp)
96: struct rawcb *rp;
97: {
98: struct socket *so = rp->rcb_socket;
99:
100: so->so_pcb = 0;
101: sofree(so);
102: LIST_REMOVE(rp, rcb_list);
103: #ifdef notdef
104: if (rp->rcb_laddr)
105: m_freem(dtom(rp->rcb_laddr));
106: rp->rcb_laddr = 0;
107: #endif
108: free((caddr_t)(rp), M_PCB);
109: }
110:
111: /*
112: * Disconnect and possibly release resources.
113: */
114: void
115: raw_disconnect(rp)
116: struct rawcb *rp;
117: {
118:
119: #ifdef notdef
120: if (rp->rcb_faddr)
121: m_freem(dtom(rp->rcb_faddr));
122: rp->rcb_faddr = 0;
123: #endif
124: if (rp->rcb_socket->so_state & SS_NOFDREF)
125: raw_detach(rp);
126: }
127:
128: #ifdef notdef
129: int
130: raw_bind(so, nam)
131: struct socket *so;
132: struct mbuf *nam;
133: {
134: struct sockaddr *addr = mtod(nam, struct sockaddr *);
135: struct rawcb *rp;
136:
137: if (ifnet == 0)
138: return (EADDRNOTAVAIL);
139: rp = sotorawcb(so);
140: nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
141: rp->rcb_laddr = mtod(nam, struct sockaddr *);
142: return (0);
143: }
144: #endif
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