Commit | Line | Data |
---|---|---|
fcfe450e | 1 | /* raw_ip.c 4.14 82/10/09 */ |
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" |
fcfe450e BJ |
9 | #include "../netinet/in.h" |
10 | #include "../netinet/in_systm.h" | |
11 | #include "../netinet/ip.h" | |
12 | #include "../netinet/ip_var.h" | |
94a62155 | 13 | #include "../net/raw_cb.h" |
a13c006d | 14 | #include "../net/route.h" |
126472ab | 15 | #include <errno.h> |
2a598b25 BJ |
16 | |
17 | /* | |
94a62155 BJ |
18 | * Raw interface to IP protocol. |
19 | */ | |
20 | ||
ee787340 SL |
21 | static struct sockaddr_in ripdst = { AF_INET }; |
22 | static struct sockaddr_in ripsrc = { AF_INET }; | |
23 | static struct sockproto ripproto = { PF_INET }; | |
94a62155 BJ |
24 | /* |
25 | * Setup generic address and protocol structures | |
26 | * for raw_input routine, then pass them along with | |
27 | * mbuf chain. | |
2a598b25 | 28 | */ |
2a598b25 BJ |
29 | rip_input(m) |
30 | struct mbuf *m; | |
31 | { | |
94a62155 | 32 | register struct ip *ip = mtod(m, struct ip *); |
2a598b25 | 33 | |
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; | |
a13c006d | 54 | struct sockaddr_in *sin; |
2a598b25 | 55 | |
94a62155 BJ |
56 | /* |
57 | * Calculate data length and get an mbuf | |
58 | * for IP header. | |
59 | */ | |
60 | for (m = m0; m; m = m->m_next) | |
61 | len += m->m_len; | |
62 | m = m_get(M_DONTWAIT); | |
63 | if (m == 0) { | |
126472ab SL |
64 | error = ENOBUFS; |
65 | goto bad; | |
94a62155 BJ |
66 | } |
67 | ||
68 | /* | |
69 | * Fill in IP header as needed. | |
70 | */ | |
71 | m->m_off = MMAXOFF - sizeof(struct ip); | |
72 | m->m_len = sizeof(struct ip); | |
73 | m->m_next = m0; | |
74 | ip = mtod(m, struct ip *); | |
75 | ip->ip_p = so->so_proto->pr_protocol; | |
76 | ip->ip_len = sizeof(struct ip) + len; | |
a13c006d BJ |
77 | if (rp->rcb_flags & RAW_LADDR) { |
78 | sin = (struct sockaddr_in *)&rp->rcb_laddr; | |
79 | if (sin->sin_family != AF_INET) { | |
126472ab SL |
80 | error = EAFNOSUPPORT; |
81 | goto bad; | |
82 | } | |
a13c006d BJ |
83 | ip->ip_src.s_addr = sin->sin_addr.s_addr; |
84 | } else | |
85 | ip->ip_src.s_addr = 0; | |
86 | ip->ip_dst = ((struct sockaddr_in *)&rp->rcb_faddr)->sin_addr; | |
94a62155 | 87 | ip->ip_ttl = MAXTTL; |
a13c006d | 88 | return (ip_output(m, (struct mbuf *)0, &routetoif, 1)); |
126472ab SL |
89 | bad: |
90 | m_freem(m); | |
91 | return (error); | |
2a598b25 | 92 | } |