projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a0b7c7fb | 1 | /* raw_imp.c 4.2 82/02/01 */ |
| 718d1f9e BJ |
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/if.h" | |
| 11 | #include "../net/if_imp.h" | |
| 12 | #include "../net/raw_cb.h" | |
| 13 | #include "/usr/include/errno.h" | |
| 14 | ||
| 15 | /* | |
| 16 | * Raw interface to IMP. | |
| 17 | */ | |
| 18 | ||
| 19 | /*ARGSUSED*/ | |
| 20 | imp_ctlinput(m) | |
| 21 | struct mbuf *m; | |
| 22 | { | |
| 23 | COUNT(IMP_CTLINPUT); | |
| 24 | } | |
| 25 | ||
| 26 | /* | |
| 27 | * Generate IMP leader and pass packet to impoutput. | |
| 28 | * The user must create a skeletal leader in order to | |
| 29 | * communicate message type, message subtype, etc. | |
| 30 | * We fill in holes where needed and verify parameters | |
| 31 | * supplied by user. | |
| 32 | */ | |
| 33 | imp_output(m, so) /* too close to impoutput */ | |
| 34 | register struct mbuf *m; | |
| 35 | struct socket *so; | |
| 36 | { | |
| 37 | struct mbuf *n; | |
| 38 | int len; | |
| a0b7c7fb | 39 | register struct imp_leader *ip; |
| 718d1f9e BJ |
40 | register struct sockaddr_in *sin; |
| 41 | register struct rawcb *rp = sotorawcb(so); | |
| 42 | ||
| 43 | COUNT(IMP_OUTPUT); | |
| 44 | /* | |
| 45 | * Verify user has supplied necessary space | |
| 46 | * for the leader and check parameters in it. | |
| 47 | */ | |
| 48 | if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct imp_leader)) && | |
| 49 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) | |
| 50 | goto bad; | |
| a0b7c7fb SL |
51 | ip = mtod(m, struct imp_leader *); |
| 52 | if (ip->il_format != IMP_NFF) | |
| 718d1f9e | 53 | goto bad; |
| a0b7c7fb SL |
54 | if (ip->il_link != IMPLINK_IP && |
| 55 | (ip->il_link < IMPLINK_LOWEXPER || ip->il_link > IMPLINK_HIGHEXPER)) | |
| 718d1f9e BJ |
56 | goto bad; |
| 57 | ||
| 58 | /* | |
| 59 | * Fill in IMP leader -- impoutput refrains from rebuilding | |
| 60 | * the leader when it sees the protocol family PF_IMPLINK. | |
| 61 | * (message size calculated by walking through mbuf's) | |
| 62 | */ | |
| 63 | for (len = 0, n = m; n; n = n->m_next) | |
| 64 | len += n->m_len; | |
| a0b7c7fb | 65 | ip->il_length = len << 3; |
| 718d1f9e | 66 | sin = (struct sockaddr_in *)&rp->rcb_addr; |
| a0b7c7fb SL |
67 | ip->il_network = sin->sin_addr.s_net; |
| 68 | ip->il_host = sin->sin_addr.s_host; | |
| 69 | ip->il_imp = sin->sin_addr.s_imp; | |
| 718d1f9e BJ |
70 | |
| 71 | return (impoutput((struct ifnet *)rp->rcb_pcb, m, PF_IMPLINK)); | |
| 72 | ||
| 73 | bad: | |
| 74 | m_freem(m); | |
| 75 | return (0); | |
| 76 | } | |
| 77 | ||
| 78 | /* | |
| 79 | * Intercept operations required to | |
| 80 | * maintain interface pointer used on output. | |
| 81 | */ | |
| 82 | imp_usrreq(so, req, m, addr) | |
| 83 | struct socket *so; | |
| 84 | int req; | |
| 85 | struct mbuf *m; | |
| 86 | caddr_t addr; | |
| 87 | { | |
| 88 | register struct rawcb *rp = sotorawcb(so); | |
| 89 | ||
| 90 | COUNT(IMP_USRREQ); | |
| 91 | if (rp == 0 && req != PRU_ATTACH) | |
| 92 | return (EINVAL); | |
| 93 | ||
| 94 | switch (req) { | |
| 95 | ||
| 96 | /* | |
| 97 | * Verify address has an interface to go with it | |
| 98 | * and record information for use in output routine. | |
| 99 | */ | |
| 100 | case PRU_SEND: | |
| 101 | case PRU_CONNECT: { | |
| 102 | register struct sockaddr_in *sin; | |
| 103 | register struct ifnet *ifp; | |
| 104 | ||
| 105 | sin = (struct sockaddr_in *)addr; | |
| 106 | ifp = if_ifonnetof(sin->sin_addr); | |
| 107 | if (ifp == 0) { | |
| 108 | ifp = if_gatewayfor(sin->sin_addr); | |
| 109 | if (ifp == 0) | |
| 110 | return (EADDRNOTAVAIL); /* XXX */ | |
| 111 | } | |
| 112 | rp->rcb_pcb = (caddr_t)ifp; | |
| 113 | break; | |
| 114 | } | |
| 115 | ||
| 116 | case PRU_DISCONNECT: | |
| 117 | rp->rcb_pcb = 0; | |
| 118 | break; | |
| 119 | ||
| 120 | case PRU_CONTROL: | |
| 121 | return (EOPNOTSUPP); | |
| 122 | } | |
| 123 | return (raw_usrreq(so, req, m, addr)); | |
| 124 | } |