1 /* 2 * Copyright (c) 1982, 1986, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)raw_imp.c 7.7 (Berkeley) 10/11/92 8 */ 9 10 #include <sys/param.h> 11 #include <sys/mbuf.h> 12 #include <sys/socket.h> 13 #include <sys/protosw.h> 14 #include <sys/socketvar.h> 15 #include <sys/errno.h> 16 17 #include <net/if.h> 18 #include <net/route.h> 19 #include <net/raw_cb.h> 20 21 #include <netinet/in.h> 22 #include <netinet/in_systm.h> 23 #include <netinet/in_var.h> 24 #include <netinet/in_pcb.h> 25 #include <netimp/if_imp.h> 26 27 /* 28 * Raw interface to IMP. 29 */ 30 31 /* 32 * Generate IMP leader and pass packet to impoutput. 33 * The user must create a skeletal leader in order to 34 * communicate message type, message subtype, etc. 35 * We fill in holes where needed and verify parameters 36 * supplied by user. 37 */ 38 rimp_output(m, so) 39 register struct mbuf *m; 40 struct socket *so; 41 { 42 struct mbuf *n; 43 int len, error = 0; 44 register struct imp_leader *ip; 45 register struct sockaddr_in *sin; 46 register struct raw_inpcb *rp = sotorawinpcb(so); 47 struct in_ifaddr *ia; 48 struct control_leader *cp; 49 50 /* 51 * Verify user has supplied necessary space 52 * for the leader and check parameters in it. 53 */ 54 if ((m->m_len < sizeof(struct control_leader)) && 55 (m = m_pullup(m, sizeof(struct control_leader))) == 0) { 56 error = EMSGSIZE; /* XXX */ 57 goto bad; 58 } 59 cp = mtod(m, struct control_leader *); 60 if (cp->dl_mtype == IMPTYPE_DATA) 61 if (m->m_len < sizeof(struct imp_leader) && 62 (m = m_pullup(m, sizeof(struct imp_leader))) == 0) { 63 error = EMSGSIZE; /* XXX */ 64 goto bad; 65 } 66 ip = mtod(m, struct imp_leader *); 67 if (ip->il_format != IMP_NFF) { 68 error = EMSGSIZE; /* XXX */ 69 goto bad; 70 } 71 #ifdef notdef 72 if (ip->il_link != IMPLINK_IP && 73 (ip->il_link<IMPLINK_LOWEXPER || ip->il_link>IMPLINK_HIGHEXPER)) { 74 error = EPERM; 75 goto bad; 76 } 77 #endif 78 79 /* 80 * Fill in IMP leader -- impoutput refrains from rebuilding 81 * the leader when it sees the protocol family PF_IMPLINK. 82 * (message size calculated by walking through mbuf's) 83 */ 84 for (len = 0, n = m; n; n = n->m_next) 85 len += n->m_len; 86 ip->il_length = htons((u_short)(len << 3)); 87 sin = (struct sockaddr_in *)rp->rinp_rcb.rcb_faddr; 88 imp_addr_to_leader((struct control_leader *)ip, sin->sin_addr.s_addr); 89 /* no routing here */ 90 ia = in_iaonnetof(in_netof(sin->sin_addr)); 91 if (ia) 92 return (impoutput(ia->ia_ifp, m, (struct sockaddr *)sin)); 93 error = ENETUNREACH; 94 bad: 95 m_freem(m); 96 return (error); 97 } 98