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1.1 root 1: /*
2: * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)raw_imp.c 7.6 (Berkeley) 6/28/90
34: */
35:
36: #include "param.h"
37: #include "mbuf.h"
38: #include "socket.h"
39: #include "protosw.h"
40: #include "socketvar.h"
41: #include "errno.h"
42:
43: #include "../net/if.h"
44: #include "../net/route.h"
45: #include "../net/raw_cb.h"
46:
47: #include "../netinet/in.h"
48: #include "../netinet/in_systm.h"
49: #include "../netinet/in_var.h"
50: #include "../netinet/in_pcb.h"
51: #include "if_imp.h"
52:
53: /*
54: * Raw interface to IMP.
55: */
56:
57: /*
58: * Generate IMP leader and pass packet to impoutput.
59: * The user must create a skeletal leader in order to
60: * communicate message type, message subtype, etc.
61: * We fill in holes where needed and verify parameters
62: * supplied by user.
63: */
64: rimp_output(m, so)
65: register struct mbuf *m;
66: struct socket *so;
67: {
68: struct mbuf *n;
69: int len, error = 0;
70: register struct imp_leader *ip;
71: register struct sockaddr_in *sin;
72: register struct raw_inpcb *rp = sotorawinpcb(so);
73: struct in_ifaddr *ia;
74: struct control_leader *cp;
75:
76: /*
77: * Verify user has supplied necessary space
78: * for the leader and check parameters in it.
79: */
80: if ((m->m_len < sizeof(struct control_leader)) &&
81: (m = m_pullup(m, sizeof(struct control_leader))) == 0) {
82: error = EMSGSIZE; /* XXX */
83: goto bad;
84: }
85: cp = mtod(m, struct control_leader *);
86: if (cp->dl_mtype == IMPTYPE_DATA)
87: if (m->m_len < sizeof(struct imp_leader) &&
88: (m = m_pullup(m, sizeof(struct imp_leader))) == 0) {
89: error = EMSGSIZE; /* XXX */
90: goto bad;
91: }
92: ip = mtod(m, struct imp_leader *);
93: if (ip->il_format != IMP_NFF) {
94: error = EMSGSIZE; /* XXX */
95: goto bad;
96: }
97: #ifdef notdef
98: if (ip->il_link != IMPLINK_IP &&
99: (ip->il_link<IMPLINK_LOWEXPER || ip->il_link>IMPLINK_HIGHEXPER)) {
100: error = EPERM;
101: goto bad;
102: }
103: #endif
104:
105: /*
106: * Fill in IMP leader -- impoutput refrains from rebuilding
107: * the leader when it sees the protocol family PF_IMPLINK.
108: * (message size calculated by walking through mbuf's)
109: */
110: for (len = 0, n = m; n; n = n->m_next)
111: len += n->m_len;
112: ip->il_length = htons((u_short)(len << 3));
113: sin = (struct sockaddr_in *)rp->rinp_rcb.rcb_faddr;
114: imp_addr_to_leader((struct control_leader *)ip, sin->sin_addr.s_addr);
115: /* no routing here */
116: ia = in_iaonnetof(in_netof(sin->sin_addr));
117: if (ia)
118: return (impoutput(ia->ia_ifp, m, (struct sockaddr *)sin));
119: error = ENETUNREACH;
120: bad:
121: m_freem(m);
122: return (error);
123: }
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