1 /* raw_cb.c 4.12 82/10/09 */ 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/mtpr.h" 9 #include "../net/if.h" 10 #include "../net/raw_cb.h" 11 #include <errno.h> 12 13 /* 14 * Routines to manage the raw protocol control blocks. 15 * 16 * TODO: 17 * hash lookups by protocol family/protocol + address family 18 * take care of unique address problems per AF? 19 * redo address binding to allow wildcards 20 */ 21 22 /* 23 * Allocate a control block and a nominal amount 24 * of buffer space for the socket. 25 */ 26 raw_attach(so) 27 register struct socket *so; 28 { 29 struct mbuf *m; 30 register struct rawcb *rp; 31 32 m = m_getclr(M_DONTWAIT); 33 if (m == 0) 34 return (ENOBUFS); 35 if (sbreserve(&so->so_snd, RAWSNDQ) == 0) 36 goto bad; 37 if (sbreserve(&so->so_rcv, RAWRCVQ) == 0) 38 goto bad2; 39 rp = mtod(m, struct rawcb *); 40 rp->rcb_socket = so; 41 insque(rp, &rawcb); 42 so->so_pcb = (caddr_t)rp; 43 rp->rcb_pcb = 0; 44 return (0); 45 bad2: 46 sbrelease(&so->so_snd); 47 bad: 48 (void) m_free(m); 49 return (ENOBUFS); 50 } 51 52 /* 53 * Detach the raw connection block and discard 54 * socket resources. 55 */ 56 raw_detach(rp) 57 register struct rawcb *rp; 58 { 59 struct socket *so = rp->rcb_socket; 60 61 so->so_pcb = 0; 62 sofree(so); 63 remque(rp); 64 (void) m_freem(dtom(rp)); 65 } 66 67 /* 68 * Disconnect and possibly release resources. 69 */ 70 raw_disconnect(rp) 71 struct rawcb *rp; 72 { 73 rp->rcb_flags &= ~RAW_FADDR; 74 if (rp->rcb_socket->so_state & SS_NOFDREF) 75 raw_detach(rp); 76 } 77 78 raw_bind(so, nam) 79 register struct socket *so; 80 struct mbuf *nam; 81 { 82 struct sockaddr *addr = mtod(nam, struct sockaddr *); 83 struct mbuf *m; 84 register struct rawcb *rp; 85 86 if (ifnet == 0) 87 return (EADDRNOTAVAIL); 88 { 89 #include "../netinet/in.h" 90 #include "../netinet/in_systm.h" 91 /* BEGIN DUBIOUS */ 92 /* 93 * Should we verify address not already in use? 94 * Some say yes, others no. 95 */ 96 switch (addr->sa_family) { 97 98 case AF_IMPLINK: 99 case AF_INET: 100 if (((struct sockaddr_in *)addr)->sin_addr.s_addr && 101 if_ifwithaddr(addr) == 0) 102 return (EADDRNOTAVAIL); 103 break; 104 105 #ifdef PUP 106 /* 107 * Curious, we convert PUP address format to internet 108 * to allow us to verify we're asking for an Ethernet 109 * interface. This is wrong, but things are heavily 110 * oriented towards the internet addressing scheme, and 111 * converting internet to PUP would be very expensive. 112 */ 113 case AF_PUP: { 114 #include "../netpup/pup.h" 115 struct sockaddr_pup *spup = (struct sockaddr_pup *)addr; 116 struct sockaddr_in inpup; 117 118 bzero((caddr_t)&inpup, sizeof(inpup)); 119 inpup.sin_family = AF_INET; 120 inpup.sin_addr.s_net = spup->sp_net; 121 inpup.sin_addr.s_impno = spup->sp_host; 122 if (inpup.sin_addr.s_addr && 123 if_ifwithaddr((struct sockaddr *)&inpup) == 0) 124 return (EADDRNOTAVAIL); 125 break; 126 } 127 #endif 128 129 default: 130 return (EAFNOSUPPORT); 131 } 132 } 133 /* END DUBIOUS */ 134 bcopy((caddr_t)addr, (caddr_t)&rp->rcb_laddr, sizeof (*addr)); 135 rp->rcb_flags |= RAW_LADDR; 136 return (0); 137 } 138 139 /* 140 * Associate a peer's address with a 141 * raw connection block. 142 */ 143 raw_connaddr(rp, nam) 144 struct rawcb *rp; 145 struct mbuf *nam; 146 { 147 struct sockaddr *addr = mtod(nam, struct sockaddr *); 148 149 bcopy((caddr_t)addr, (caddr_t)&rp->rcb_faddr, sizeof(*addr)); 150 rp->rcb_flags |= RAW_FADDR; 151 } 152