Return to raw_imp.c CVS log

Up to [CSRG BSD Unix] / 42BSD / sys / netimp

Annotation of 42BSD/sys/netimp/raw_imp.c, revision 1.1.1.1

1.1       root        1: /*     raw_imp.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 "../netinet/in.h"
                     15: #include "../netinet/in_systm.h"
                     16: #include "../netimp/if_imp.h"
                     17: 
                     18: /*
                     19:  * Raw interface to IMP.
                     20:  */
                     21: 
                     22: /*
                     23:  * Generate IMP leader and pass packet to impoutput.
                     24:  * The user must create a skeletal leader in order to
                     25:  * communicate message type, message subtype, etc.
                     26:  * We fill in holes where needed and verify parameters
                     27:  * supplied by user.
                     28:  */
                     29: rimp_output(m, so)
                     30:        register struct mbuf *m;
                     31:        struct socket *so;
                     32: {
                     33:        struct mbuf *n;
                     34:        int len, error = 0;
                     35:        register struct imp_leader *ip;
                     36:        register struct sockaddr_in *sin;
                     37:        register struct rawcb *rp = sotorawcb(so);
                     38:        struct ifnet *ifp;
                     39:        struct control_leader *cp;
                     40: 
                     41:        /*
                     42:         * Verify user has supplied necessary space
                     43:         * for the leader and check parameters in it.
                     44:         */
                     45:        if ((m->m_off > MMAXOFF || m->m_len < sizeof(struct control_leader)) &&
                     46:            (m = m_pullup(m, sizeof(struct control_leader))) == 0) {
                     47:                error = EMSGSIZE;       /* XXX */
                     48:                goto bad;
                     49:        }
                     50:        cp = mtod(m, struct control_leader *);
                     51:        if (cp->dl_mtype == IMPTYPE_DATA)
                     52:                if (m->m_len < sizeof(struct imp_leader) &&
                     53:                    (m = m_pullup(m, sizeof(struct imp_leader))) == 0) {
                     54:                        error = EMSGSIZE;       /* XXX */
                     55:                        goto bad;
                     56:                }
                     57:        ip = mtod(m, struct imp_leader *);
                     58:        if (ip->il_format != IMP_NFF) {
                     59:                error = EMSGSIZE;               /* XXX */
                     60:                goto bad;
                     61:        }
                     62: #ifdef notdef
                     63:        if (ip->il_link != IMPLINK_IP &&
                     64:            (ip->il_link<IMPLINK_LOWEXPER || ip->il_link>IMPLINK_HIGHEXPER)) {
                     65:                error = EPERM;
                     66:                goto bad;
                     67:        }
                     68: #endif
                     69: 
                     70:        /*
                     71:         * Fill in IMP leader -- impoutput refrains from rebuilding
                     72:         * the leader when it sees the protocol family PF_IMPLINK.
                     73:         * (message size calculated by walking through mbuf's)
                     74:         */
                     75:        for (len = 0, n = m; n; n = n->m_next)
                     76:                len += n->m_len;
                     77:        ip->il_length = htons((u_short)(len << 3));
                     78:        sin = (struct sockaddr_in *)&rp->rcb_faddr;
                     79: #ifdef notdef
                     80:        ip->il_network = sin->sin_addr.s_net;
                     81: #else
                     82:        ip->il_network = 0;
                     83: #endif
                     84:        ip->il_host = sin->sin_addr.s_host;
                     85:        ip->il_imp = sin->sin_addr.s_imp;
                     86:        /* no routing here */
                     87:        ifp = if_ifonnetof((int)sin->sin_addr.s_net);
                     88:        if (ifp)
                     89:                return (impoutput(ifp, m, (struct sockaddr *)sin));
                     90:        error = ENETUNREACH;
                     91: bad:
                     92:        m_freem(m);
                     93:        return (error);
                     94: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.