1 /* raw_cb.c 4.11 82/07/24 */ 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/in.h" 10 #include "../net/in_systm.h" 11 #include "../net/if.h" 12 #include "../net/raw_cb.h" 13 #include "../net/pup.h" 14 #include <errno.h> 15 16 /* 17 * Routines to manage the raw protocol control blocks. 18 * 19 * TODO: 20 * hash lookups by protocol family/protocol + address family 21 * take care of unique address problems per AF? 22 * redo address binding to allow wildcards 23 */ 24 25 /* 26 * Allocate a control block and a nominal amount 27 * of buffer space for the socket. 28 */ 29 raw_attach(so, addr) 30 register struct socket *so; 31 struct sockaddr *addr; 32 { 33 struct mbuf *m; 34 register struct rawcb *rp; 35 36 if (ifnet == 0) 37 return (EADDRNOTAVAIL); 38 /* 39 * Should we verify address not already in use? 40 * Some say yes, others no. 41 */ 42 if (addr) switch (addr->sa_family) { 43 44 case AF_IMPLINK: 45 case AF_INET: 46 if (((struct sockaddr_in *)addr)->sin_addr.s_addr && 47 if_ifwithaddr(addr) == 0) 48 return (EADDRNOTAVAIL); 49 break; 50 51 #ifdef PUP 52 /* 53 * Curious, we convert PUP address format to internet 54 * to allow us to verify we're asking for an Ethernet 55 * interface. This is wrong, but things are heavily 56 * oriented towards the internet addressing scheme, and 57 * converting internet to PUP would be very expensive. 58 */ 59 case AF_PUP: { 60 struct sockaddr_pup *spup = (struct sockaddr_pup *)addr; 61 struct sockaddr_in inpup; 62 63 bzero((caddr_t)&inpup, sizeof(inpup)); 64 inpup.sin_family = AF_INET; 65 inpup.sin_addr.s_net = spup->sp_net; 66 inpup.sin_addr.s_impno = spup->sp_host; 67 if (inpup.sin_addr.s_addr && 68 if_ifwithaddr((struct sockaddr *)&inpup) == 0) 69 return (EADDRNOTAVAIL); 70 break; 71 } 72 #endif 73 74 default: 75 return (EAFNOSUPPORT); 76 } 77 m = m_getclr(M_DONTWAIT); 78 if (m == 0) 79 return (ENOBUFS); 80 if (sbreserve(&so->so_snd, RAWSNDQ) == 0) 81 goto bad; 82 if (sbreserve(&so->so_rcv, RAWRCVQ) == 0) 83 goto bad2; 84 rp = mtod(m, struct rawcb *); 85 rp->rcb_socket = so; 86 insque(rp, &rawcb); 87 so->so_pcb = (caddr_t)rp; 88 rp->rcb_pcb = 0; 89 if (addr) { 90 bcopy((caddr_t)addr, (caddr_t)&rp->rcb_laddr, sizeof(*addr)); 91 rp->rcb_flags |= RAW_LADDR; 92 } 93 return (0); 94 bad2: 95 sbrelease(&so->so_snd); 96 bad: 97 (void) m_free(m); 98 return (ENOBUFS); 99 } 100 101 /* 102 * Detach the raw connection block and discard 103 * socket resources. 104 */ 105 raw_detach(rp) 106 register struct rawcb *rp; 107 { 108 struct socket *so = rp->rcb_socket; 109 110 so->so_pcb = 0; 111 sofree(so); 112 remque(rp); 113 (void) m_freem(dtom(rp)); 114 } 115 116 /* 117 * Disconnect and possibly release resources. 118 */ 119 raw_disconnect(rp) 120 struct rawcb *rp; 121 { 122 rp->rcb_flags &= ~RAW_FADDR; 123 if (rp->rcb_socket->so_state & SS_NOFDREF) 124 raw_detach(rp); 125 } 126 127 /* 128 * Associate a peer's address with a 129 * raw connection block. 130 */ 131 raw_connaddr(rp, addr) 132 struct rawcb *rp; 133 struct sockaddr *addr; 134 { 135 bcopy((caddr_t)addr, (caddr_t)&rp->rcb_faddr, sizeof(*addr)); 136 rp->rcb_flags |= RAW_FADDR; 137 } 138