projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 02122dcc | 1 | /* raw_ip.c 4.11 82/04/11 */ |
| 2a598b25 BJ |
2 | |
| 3 | #include "../h/param.h" | |
| 4 | #include "../h/mbuf.h" | |
| 5 | #include "../h/socket.h" | |
| 94a62155 | 6 | #include "../h/protosw.h" |
| 2a598b25 | 7 | #include "../h/socketvar.h" |
| 126472ab | 8 | #include "../net/if.h" |
| 2a598b25 BJ |
9 | #include "../net/in.h" |
| 10 | #include "../net/in_systm.h" | |
| 94a62155 BJ |
11 | #include "../net/ip.h" |
| 12 | #include "../net/ip_var.h" | |
| 13 | #include "../net/raw_cb.h" | |
| 126472ab | 14 | #include <errno.h> |
| 2a598b25 BJ |
15 | |
| 16 | /* | |
| 94a62155 BJ |
17 | * Raw interface to IP protocol. |
| 18 | */ | |
| 19 | ||
| ee787340 SL |
20 | static struct sockaddr_in ripdst = { AF_INET }; |
| 21 | static struct sockaddr_in ripsrc = { AF_INET }; | |
| 22 | static struct sockproto ripproto = { PF_INET }; | |
| 94a62155 BJ |
23 | /* |
| 24 | * Setup generic address and protocol structures | |
| 25 | * for raw_input routine, then pass them along with | |
| 26 | * mbuf chain. | |
| 2a598b25 | 27 | */ |
| 2a598b25 BJ |
28 | rip_input(m) |
| 29 | struct mbuf *m; | |
| 30 | { | |
| 94a62155 | 31 | register struct ip *ip = mtod(m, struct ip *); |
| 2a598b25 BJ |
32 | |
| 33 | COUNT(RIP_INPUT); | |
| 94a62155 | 34 | ripproto.sp_protocol = ip->ip_p; |
| faad37c0 SL |
35 | ripdst.sin_addr = ip->ip_dst; |
| 36 | ripsrc.sin_addr = ip->ip_src; | |
| 02122dcc SL |
37 | raw_input(m, &ripproto, (struct sockaddr *)&ripsrc, |
| 38 | (struct sockaddr *)&ripdst); | |
| 2a598b25 BJ |
39 | } |
| 40 | ||
| 94a62155 BJ |
41 | /* |
| 42 | * Generate IP header and pass packet to ip_output. | |
| 43 | * Tack on options user may have setup with control call. | |
| 44 | */ | |
| 45 | rip_output(m0, so) | |
| 46 | struct mbuf *m0; | |
| 47 | struct socket *so; | |
| 2a598b25 | 48 | { |
| 94a62155 BJ |
49 | register struct mbuf *m; |
| 50 | register struct ip *ip; | |
| 126472ab SL |
51 | int len = 0, error; |
| 52 | struct rawcb *rp = sotorawcb(so); | |
| 53 | struct ifnet *ifp; | |
| 54 | struct sockaddr_in *src; | |
| 2a598b25 BJ |
55 | |
| 56 | COUNT(RIP_OUTPUT); | |
| 94a62155 BJ |
57 | /* |
| 58 | * Calculate data length and get an mbuf | |
| 59 | * for IP header. | |
| 60 | */ | |
| 61 | for (m = m0; m; m = m->m_next) | |
| 62 | len += m->m_len; | |
| 63 | m = m_get(M_DONTWAIT); | |
| 64 | if (m == 0) { | |
| 126472ab SL |
65 | error = ENOBUFS; |
| 66 | goto bad; | |
| 94a62155 BJ |
67 | } |
| 68 | ||
| 69 | /* | |
| 70 | * Fill in IP header as needed. | |
| 71 | */ | |
| 72 | m->m_off = MMAXOFF - sizeof(struct ip); | |
| 73 | m->m_len = sizeof(struct ip); | |
| 74 | m->m_next = m0; | |
| 75 | ip = mtod(m, struct ip *); | |
| 76 | ip->ip_p = so->so_proto->pr_protocol; | |
| 77 | ip->ip_len = sizeof(struct ip) + len; | |
| 126472ab SL |
78 | ip->ip_dst = ((struct sockaddr_in *)&rp->rcb_faddr)->sin_addr; |
| 79 | /* local address may not be specified -- XXX */ | |
| 80 | ifp = if_ifonnetof(ip->ip_dst.s_net); | |
| 81 | if (ifp == 0) { | |
| 82 | error = ENETUNREACH; | |
| 83 | goto bad; | |
| 84 | } | |
| 85 | if (rp->rcb_flags & RAW_LADDR) | |
| 86 | src = (struct sockaddr_in *)&rp->rcb_laddr; | |
| 87 | else { | |
| 88 | if (ifp->if_addr.sa_family != AF_INET) { | |
| 89 | error = EAFNOSUPPORT; | |
| 90 | goto bad; | |
| 91 | } | |
| 92 | src = (struct sockaddr_in *)&ifp->if_addr; | |
| 93 | } | |
| 94 | ip->ip_src = src->sin_addr; | |
| 94a62155 | 95 | ip->ip_ttl = MAXTTL; |
| ee787340 | 96 | return (ip_output(m, (struct mbuf *)0, 0, 1)); |
| 126472ab SL |
97 | bad: |
| 98 | m_freem(m); | |
| 99 | return (error); | |
| 2a598b25 | 100 | } |