projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8f57889f C |
1 | /* raw_pup.c 6.1 83/07/29 */ |
| 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 "../h/errno.h" | |
| 9 | ||
| 10 | #include "../net/if.h" | |
| 11 | #include "../net/route.h" | |
| 12 | #include "../net/raw_cb.h" | |
| 13 | ||
| 14 | #include "../netpup/pup.h" | |
| 15 | ||
| 16 | /* | |
| 17 | * Raw PUP protocol interface. | |
| 18 | */ | |
| 19 | ||
| 20 | struct sockaddr_pup pupsrc = { AF_PUP }; | |
| 21 | struct sockaddr_pup pupdst = { AF_PUP }; | |
| 22 | struct sockproto pupproto = { PF_PUP }; | |
| 23 | /* | |
| 24 | * Raw PUP input. | |
| 25 | */ | |
| 26 | rpup_input(m) | |
| 27 | struct mbuf *m; | |
| 28 | { | |
| 29 | register struct pup_header *pup = mtod(m, struct pup_header *); | |
| 30 | ||
| 31 | pupproto.sp_protocol = pup->pup_type; | |
| 32 | bcopy((caddr_t)&pup->pup_dnet, (caddr_t)&pupdst.spup_net, | |
| 33 | sizeof (struct pupport)); | |
| 34 | bcopy((caddr_t)&pup->pup_snet, (caddr_t)&pupsrc.spup_net, | |
| 35 | sizeof (struct pupport)); | |
| 36 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, | |
| 37 | (struct sockaddr *)&pupdst); | |
| 38 | } | |
| 39 | ||
| 40 | /* | |
| 41 | * Encapsulate packet in PUP header which is supplied by the | |
| 42 | * user. This is done to allow user to specify PUP identifier. | |
| 43 | */ | |
| 44 | rpup_output(m, so) | |
| 45 | register struct mbuf *m; | |
| 46 | struct socket *so; | |
| 47 | { | |
| 48 | register struct rawcb *rp = sotorawcb(so); | |
| 49 | register struct pup_header *pup; | |
| 50 | int len, error = 0; | |
| 51 | register struct mbuf *n, *last; | |
| 52 | struct sockaddr_pup *dst; | |
| 53 | struct ifnet *ifp; | |
| 54 | u_short *pc; | |
| 55 | ||
| 56 | /* | |
| 57 | * Verify user has supplied necessary space | |
| 58 | * for the header and check parameters in it. | |
| 59 | */ | |
| 60 | if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct pup_header)) && | |
| 61 | (m = m_pullup(m, sizeof(struct pup_header))) == 0) { | |
| 62 | error = EINVAL; | |
| 63 | goto bad; | |
| 64 | } | |
| 65 | pup = mtod(m, struct pup_header *); | |
| 66 | if (pup->pup_type == 0 || (pup->pup_tcontrol &~ PUP_TRACE)) { | |
| 67 | error = EINVAL; | |
| 68 | goto bad; | |
| 69 | } | |
| 70 | for (len = 0, n = last = m; n; last = n, n = n->m_next) | |
| 71 | len += n->m_len; | |
| 72 | /* assume user leaves space for checksum */ | |
| 73 | if ((len & 1) || len < MINPUPSIZ || len > MAXPUPSIZ) { | |
| 74 | error = EMSGSIZE; | |
| 75 | goto bad; | |
| 76 | } | |
| 77 | pup->pup_length = htons((u_short)len); | |
| 78 | dst = (struct sockaddr_pup *)&rp->rcb_faddr; | |
| 79 | bcopy((caddr_t)&dst->spup_net, (caddr_t)&pup->pup_dnet, | |
| 80 | sizeof (struct pupport)); | |
| 81 | if (rp->rcb_route.ro_rt == 0) | |
| 82 | ifp = if_ifonnetof(dst->spup_net); | |
| 83 | else { | |
| 84 | rp->rcb_route.ro_rt->rt_use++; | |
| 85 | ifp = rp->rcb_route.ro_rt->rt_ifp; | |
| 86 | } | |
| 87 | if (ifp == 0) { | |
| 88 | error = ENETUNREACH; | |
| 89 | goto bad; | |
| 90 | } | |
| 91 | if (rp->rcb_flags & RAW_LADDR) { | |
| 92 | register struct sockaddr_pup *src; | |
| 93 | ||
| 94 | src = (struct sockaddr_pup *)&rp->rcb_laddr; | |
| 95 | bcopy((caddr_t)&src->spup_net, (caddr_t)&pup->pup_snet, | |
| 96 | sizeof (struct pupport)); | |
| 97 | } else { | |
| 98 | pup->pup_snet = ifp->if_net; | |
| 99 | pup->pup_shost = ifp->if_host[0]; | |
| 100 | /* socket is specified by user */ | |
| 101 | } | |
| 102 | /* | |
| 103 | * Fill in checksum unless user indicates none should be specified. | |
| 104 | */ | |
| 105 | pc = (u_short *)(mtod(last, caddr_t) + last->m_len - sizeof (short)); | |
| 106 | if (*pc != PUP_NOCKSUM) | |
| 107 | *pc = htons((u_short)pup_cksum(m, len - sizeof (short))); | |
| 108 | return ((*ifp->if_output)(ifp, m, (struct sockaddr *)dst)); | |
| 109 | bad: | |
| 110 | m_freem(m); | |
| 111 | return (error); | |
| 112 | } |