| 1 | /* raw_pup.c 4.4 82/03/03 */ |
| 2 | |
| 3 | #include "../h/param.h" |
| 4 | #include "../h/mbuf.h" |
| 5 | #include "../h/socket.h" |
| 6 | #include "../h/protosw.h" |
| 7 | #include "../h/socketvar.h" |
| 8 | #include "../net/in.h" |
| 9 | #include "../net/in_systm.h" |
| 10 | #include "../net/pup.h" |
| 11 | #include "../net/raw_cb.h" |
| 12 | #include "/usr/include/errno.h" |
| 13 | |
| 14 | /* |
| 15 | * Raw PUP protocol interface. |
| 16 | */ |
| 17 | |
| 18 | /*ARGSUSED*/ |
| 19 | rpup_ctlinput(m) |
| 20 | struct mbuf *m; |
| 21 | { |
| 22 | COUNT(RPUP_CTLINPUT); |
| 23 | } |
| 24 | |
| 25 | /* |
| 26 | * Encapsulate packet in PUP header which is supplied by the |
| 27 | * user. This is done to allow user to specify PUP identifier. |
| 28 | */ |
| 29 | rpup_output(m0, so) |
| 30 | struct mbuf *m0; |
| 31 | struct socket *so; |
| 32 | { |
| 33 | register struct rawcb *rp = sotorawcb(so); |
| 34 | register struct pup_header *pup; |
| 35 | int len; |
| 36 | struct mbuf *n; |
| 37 | struct sockaddr_pup *spup; |
| 38 | struct ifnet *ifp; |
| 39 | |
| 40 | COUNT(RPUP_OUTPUT); |
| 41 | /* |
| 42 | * Verify user has supplied necessary space |
| 43 | * for the header and check parameters in it. |
| 44 | */ |
| 45 | if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct pup_header)) && |
| 46 | (m = m_pullup(m, sizeof(struct pup_header)) == 0) { |
| 47 | goto bad; |
| 48 | pup = mtod(m, struct pup_header *); |
| 49 | if (pup->pup_type == 0) |
| 50 | goto bad; |
| 51 | if (pup->pup_tcontrol && (pup->pup_tcontrol & ~PUP_TRACE)) |
| 52 | goto bad; |
| 53 | for (len = 0, n = m; n; n = n->m_next) |
| 54 | len += n->m_len; |
| 55 | pup->pup_length = len; |
| 56 | spup = (struct sockaddr_pup *)&rp->rcb_addr; |
| 57 | pup->pup_dport = spup->spup_addr; |
| 58 | |
| 59 | /* |
| 60 | * Insure proper source address is included. |
| 61 | */ |
| 62 | spup = (struct sockadrr_pup *)rp->rcb_socket->so_addr; |
| 63 | pup->pup_sport = spup->spup_addr; |
| 64 | /* for now, assume user generates PUP checksum. */ |
| 65 | |
| 66 | ifp = if_ifonnetof(&rp->rcb_addr); |
| 67 | if (ifp == 0) { |
| 68 | ifp = if_gatewayfor(&rp->rcb_addr); |
| 69 | if (ifp == 0) |
| 70 | goto bad; |
| 71 | } |
| 72 | return (enoutput((struct ifnet *)rp->rcb_pcb, m, PF_PUP)); |
| 73 | |
| 74 | bad: |
| 75 | m_freem(m); |
| 76 | return (0); |
| 77 | } |