1 /* raw_cb.c 6.1 83/07/29 */ 2 3 #include "../h/param.h" 4 #include "../h/systm.h" 5 #include "../h/mbuf.h" 6 #include "../h/socket.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 #include "../netinet/in.h" 14 #include "../netpup/pup.h" 15 16 #include "../vax/mtpr.h" 17 18 /* 19 * Routines to manage the raw protocol control blocks. 20 * 21 * TODO: 22 * hash lookups by protocol family/protocol + address family 23 * take care of unique address problems per AF? 24 * redo address binding to allow wildcards 25 */ 26 27 /* 28 * Allocate a control block and a nominal amount 29 * of buffer space for the socket. 30 */ 31 raw_attach(so) 32 register struct socket *so; 33 { 34 struct mbuf *m; 35 register struct rawcb *rp; 36 37 m = m_getclr(M_DONTWAIT, MT_PCB); 38 if (m == 0) 39 return (ENOBUFS); 40 if (sbreserve(&so->so_snd, RAWSNDQ) == 0) 41 goto bad; 42 if (sbreserve(&so->so_rcv, RAWRCVQ) == 0) 43 goto bad2; 44 rp = mtod(m, struct rawcb *); 45 rp->rcb_socket = so; 46 insque(rp, &rawcb); 47 so->so_pcb = (caddr_t)rp; 48 rp->rcb_pcb = 0; 49 return (0); 50 bad2: 51 sbrelease(&so->so_snd); 52 bad: 53 (void) m_free(m); 54 return (ENOBUFS); 55 } 56 57 /* 58 * Detach the raw connection block and discard 59 * socket resources. 60 */ 61 raw_detach(rp) 62 register struct rawcb *rp; 63 { 64 struct socket *so = rp->rcb_socket; 65 66 so->so_pcb = 0; 67 sofree(so); 68 remque(rp); 69 m_freem(dtom(rp)); 70 } 71 72 /* 73 * Disconnect and possibly release resources. 74 */ 75 raw_disconnect(rp) 76 struct rawcb *rp; 77 { 78 79 rp->rcb_flags &= ~RAW_FADDR; 80 if (rp->rcb_socket->so_state & SS_NOFDREF) 81 raw_detach(rp); 82 } 83 84 raw_bind(so, nam) 85 register struct socket *so; 86 struct mbuf *nam; 87 { 88 struct sockaddr *addr = mtod(nam, struct sockaddr *); 89 register struct rawcb *rp; 90 91 if (ifnet == 0) 92 return (EADDRNOTAVAIL); 93 /* BEGIN DUBIOUS */ 94 /* 95 * Should we verify address not already in use? 96 * Some say yes, others no. 97 */ 98 switch (addr->sa_family) { 99 100 #ifdef INET 101 case AF_IMPLINK: 102 case AF_INET: { 103 if (((struct sockaddr_in *)addr)->sin_addr.s_addr && 104 if_ifwithaddr(addr) == 0) 105 return (EADDRNOTAVAIL); 106 break; 107 } 108 #endif 109 110 #ifdef PUP 111 /* 112 * Curious, we convert PUP address format to internet 113 * to allow us to verify we're asking for an Ethernet 114 * interface. This is wrong, but things are heavily 115 * oriented towards the internet addressing scheme, and 116 * converting internet to PUP would be very expensive. 117 */ 118 case AF_PUP: { 119 struct sockaddr_pup *spup = (struct sockaddr_pup *)addr; 120 struct sockaddr_in inpup; 121 122 bzero((caddr_t)&inpup, (unsigned)sizeof(inpup)); 123 inpup.sin_family = AF_INET; 124 inpup.sin_addr = if_makeaddr(spup->spup_net, spup->spup_host); 125 if (inpup.sin_addr.s_addr && 126 if_ifwithaddr((struct sockaddr *)&inpup) == 0) 127 return (EADDRNOTAVAIL); 128 break; 129 } 130 #endif 131 132 default: 133 return (EAFNOSUPPORT); 134 } 135 /* END DUBIOUS */ 136 rp = sotorawcb(so); 137 bcopy((caddr_t)addr, (caddr_t)&rp->rcb_laddr, sizeof (*addr)); 138 rp->rcb_flags |= RAW_LADDR; 139 return (0); 140 } 141 142 /* 143 * Associate a peer's address with a 144 * raw connection block. 145 */ 146 raw_connaddr(rp, nam) 147 struct rawcb *rp; 148 struct mbuf *nam; 149 { 150 struct sockaddr *addr = mtod(nam, struct sockaddr *); 151 152 bcopy((caddr_t)addr, (caddr_t)&rp->rcb_faddr, sizeof(*addr)); 153 rp->rcb_flags |= RAW_FADDR; 154 } 155