Commit | Line | Data |
---|---|---|
f4d55810 | 1 | /* raw_ip.c 4.17 83/02/10 */ |
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" |
f4d55810 SL |
8 | #include "../h/errno.h" |
9 | ||
126472ab | 10 | #include "../net/if.h" |
f4d55810 SL |
11 | #include "../net/raw_cb.h" |
12 | #include "../net/route.h" | |
13 | ||
fcfe450e BJ |
14 | #include "../netinet/in.h" |
15 | #include "../netinet/in_systm.h" | |
16 | #include "../netinet/ip.h" | |
17 | #include "../netinet/ip_var.h" | |
2a598b25 BJ |
18 | |
19 | /* | |
94a62155 BJ |
20 | * Raw interface to IP protocol. |
21 | */ | |
22 | ||
ee787340 SL |
23 | static struct sockaddr_in ripdst = { AF_INET }; |
24 | static struct sockaddr_in ripsrc = { AF_INET }; | |
25 | static struct sockproto ripproto = { PF_INET }; | |
94a62155 BJ |
26 | /* |
27 | * Setup generic address and protocol structures | |
28 | * for raw_input routine, then pass them along with | |
29 | * mbuf chain. | |
2a598b25 | 30 | */ |
2a598b25 BJ |
31 | rip_input(m) |
32 | struct mbuf *m; | |
33 | { | |
94a62155 | 34 | register struct ip *ip = mtod(m, struct ip *); |
2a598b25 | 35 | |
94a62155 | 36 | ripproto.sp_protocol = ip->ip_p; |
faad37c0 SL |
37 | ripdst.sin_addr = ip->ip_dst; |
38 | ripsrc.sin_addr = ip->ip_src; | |
02122dcc SL |
39 | raw_input(m, &ripproto, (struct sockaddr *)&ripsrc, |
40 | (struct sockaddr *)&ripdst); | |
2a598b25 BJ |
41 | } |
42 | ||
94a62155 BJ |
43 | /* |
44 | * Generate IP header and pass packet to ip_output. | |
45 | * Tack on options user may have setup with control call. | |
46 | */ | |
47 | rip_output(m0, so) | |
48 | struct mbuf *m0; | |
49 | struct socket *so; | |
2a598b25 | 50 | { |
94a62155 BJ |
51 | register struct mbuf *m; |
52 | register struct ip *ip; | |
126472ab SL |
53 | int len = 0, error; |
54 | struct rawcb *rp = sotorawcb(so); | |
a13c006d | 55 | struct sockaddr_in *sin; |
2a598b25 | 56 | |
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; | |
cce93e4b | 63 | m = m_get(M_DONTWAIT, MT_HEADER); |
94a62155 | 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; | |
a13c006d BJ |
78 | if (rp->rcb_flags & RAW_LADDR) { |
79 | sin = (struct sockaddr_in *)&rp->rcb_laddr; | |
80 | if (sin->sin_family != AF_INET) { | |
126472ab SL |
81 | error = EAFNOSUPPORT; |
82 | goto bad; | |
83 | } | |
a13c006d BJ |
84 | ip->ip_src.s_addr = sin->sin_addr.s_addr; |
85 | } else | |
86 | ip->ip_src.s_addr = 0; | |
87 | ip->ip_dst = ((struct sockaddr_in *)&rp->rcb_faddr)->sin_addr; | |
94a62155 | 88 | ip->ip_ttl = MAXTTL; |
a13c006d | 89 | return (ip_output(m, (struct mbuf *)0, &routetoif, 1)); |
126472ab SL |
90 | bad: |
91 | m_freem(m); | |
92 | return (error); | |
2a598b25 | 93 | } |