Commit | Line | Data |
---|---|---|
91b2c865 | 1 | /* raw_imp.c 6.4 85/03/19 */ |
718d1f9e | 2 | |
54cf16ba JB |
3 | #include "param.h" |
4 | #include "mbuf.h" | |
5 | #include "socket.h" | |
6 | #include "protosw.h" | |
7 | #include "socketvar.h" | |
8 | #include "errno.h" | |
f4d55810 SL |
9 | |
10 | #include "../net/if.h" | |
515ee6c7 | 11 | #include "../net/route.h" |
f4d55810 SL |
12 | #include "../net/raw_cb.h" |
13 | ||
fcfe450e BJ |
14 | #include "../netinet/in.h" |
15 | #include "../netinet/in_systm.h" | |
91b2c865 | 16 | #include "../netinet/in_var.h" |
54cf16ba | 17 | #include "if_imp.h" |
718d1f9e BJ |
18 | |
19 | /* | |
20 | * Raw interface to IMP. | |
21 | */ | |
22 | ||
718d1f9e BJ |
23 | /* |
24 | * Generate IMP leader and pass packet to impoutput. | |
25 | * The user must create a skeletal leader in order to | |
26 | * communicate message type, message subtype, etc. | |
27 | * We fill in holes where needed and verify parameters | |
28 | * supplied by user. | |
29 | */ | |
8e999b50 | 30 | rimp_output(m, so) |
718d1f9e BJ |
31 | register struct mbuf *m; |
32 | struct socket *so; | |
33 | { | |
34 | struct mbuf *n; | |
126472ab | 35 | int len, error = 0; |
a0b7c7fb | 36 | register struct imp_leader *ip; |
718d1f9e BJ |
37 | register struct sockaddr_in *sin; |
38 | register struct rawcb *rp = sotorawcb(so); | |
91b2c865 | 39 | struct in_ifaddr *ia; |
a2cd4df7 | 40 | struct control_leader *cp; |
718d1f9e | 41 | |
718d1f9e BJ |
42 | /* |
43 | * Verify user has supplied necessary space | |
44 | * for the leader and check parameters in it. | |
45 | */ | |
a2cd4df7 | 46 | if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct control_leader)) && |
126472ab SL |
47 | (m = m_pullup(m, sizeof(struct control_leader))) == 0) { |
48 | error = EMSGSIZE; /* XXX */ | |
49 | goto bad; | |
50 | } | |
a2cd4df7 BJ |
51 | cp = mtod(m, struct control_leader *); |
52 | if (cp->dl_mtype == IMPTYPE_DATA) | |
53 | if (m->m_len < sizeof(struct imp_leader) && | |
126472ab SL |
54 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) { |
55 | error = EMSGSIZE; /* XXX */ | |
56 | goto bad; | |
57 | } | |
a0b7c7fb | 58 | ip = mtod(m, struct imp_leader *); |
126472ab SL |
59 | if (ip->il_format != IMP_NFF) { |
60 | error = EMSGSIZE; /* XXX */ | |
718d1f9e | 61 | goto bad; |
126472ab | 62 | } |
27cadab0 | 63 | #ifdef notdef |
a0b7c7fb | 64 | if (ip->il_link != IMPLINK_IP && |
126472ab SL |
65 | (ip->il_link<IMPLINK_LOWEXPER || ip->il_link>IMPLINK_HIGHEXPER)) { |
66 | error = EPERM; | |
718d1f9e | 67 | goto bad; |
126472ab | 68 | } |
27cadab0 | 69 | #endif |
718d1f9e BJ |
70 | |
71 | /* | |
72 | * Fill in IMP leader -- impoutput refrains from rebuilding | |
73 | * the leader when it sees the protocol family PF_IMPLINK. | |
74 | * (message size calculated by walking through mbuf's) | |
75 | */ | |
76 | for (len = 0, n = m; n; n = n->m_next) | |
77 | len += n->m_len; | |
668cc26d | 78 | ip->il_length = htons((u_short)(len << 3)); |
126472ab | 79 | sin = (struct sockaddr_in *)&rp->rcb_faddr; |
91b2c865 | 80 | imp_addr_to_leader(ip, sin->sin_addr.s_addr); /* BRL */ |
ee787340 | 81 | /* no routing here */ |
91b2c865 MK |
82 | ia = in_iaonnetof(in_netof(sin->sin_addr)); |
83 | if (ia) | |
84 | return (impoutput(ia->ia_ifp, m, (struct sockaddr *)sin)); | |
126472ab | 85 | error = ENETUNREACH; |
718d1f9e BJ |
86 | bad: |
87 | m_freem(m); | |
126472ab | 88 | return (error); |
718d1f9e | 89 | } |