projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 668cc26d | 1 | /* raw_cb.c 4.5 82/03/13 */ |
| 785d93ac BJ |
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" | |
| 1e25d807 | 13 | #include "../errno.h" |
| 785d93ac BJ |
14 | |
| 15 | /* | |
| 16 | * Routines to manage the raw protocol control blocks. | |
| 17 | * | |
| 18 | * TODO: | |
| 19 | * hash lookups by protocol family/protocol + address family | |
| 20 | * take care of unique address problems per AF | |
| 1e25d807 | 21 | * redo address binding to allow wildcards |
| 785d93ac BJ |
22 | */ |
| 23 | ||
| 24 | /* | |
| 25 | * Allocate a control block and a nominal amount | |
| 26 | * of buffer space for the socket. | |
| 27 | */ | |
| 28 | raw_attach(so, addr) | |
| 29 | register struct socket *so; | |
| 30 | struct sockaddr *addr; | |
| 31 | { | |
| 32 | struct mbuf *m; | |
| 33 | register struct rawcb *rp; | |
| 34 | struct ifnet *ifp = ifnet; | |
| 35 | ||
| 36 | COUNT(RAW_ATTACH); | |
| 785d93ac BJ |
37 | /* |
| 38 | * Should we verify address not already in use? | |
| 39 | * Some say yes, others no. | |
| 40 | */ | |
| 41 | if (addr) switch (addr->sa_family) { | |
| 42 | ||
| a2cd4df7 | 43 | case AF_IMPLINK: |
| 785d93ac BJ |
44 | case AF_INET: { |
| 45 | register struct sockaddr_in *sin = (struct sockaddr_in *)addr; | |
| 46 | ||
| 47 | if (ifnet && sin->sin_addr.s_addr == 0) | |
| 48 | sin->sin_addr = ifnet->if_addr; | |
| 49 | ifp = if_ifwithaddr(sin->sin_addr); | |
| 50 | break; | |
| 51 | } | |
| 52 | ||
| 1e25d807 BJ |
53 | case AF_PUP: |
| 54 | ifp = ifnet; | |
| 55 | break; | |
| 56 | ||
| 785d93ac BJ |
57 | default: |
| 58 | return (EAFNOSUPPORT); | |
| 59 | } | |
| 60 | if (ifp == 0) | |
| 61 | return (EADDRNOTAVAIL); | |
| 62 | m = m_getclr(M_DONTWAIT); | |
| 63 | if (m == 0) | |
| 64 | return (ENOBUFS); | |
| 65 | if (sbreserve(&so->so_snd, RAWSNDQ) == 0) | |
| 66 | goto bad; | |
| 67 | if (sbreserve(&so->so_rcv, RAWRCVQ) == 0) | |
| 68 | goto bad2; | |
| 69 | rp = mtod(m, struct rawcb *); | |
| 70 | rp->rcb_socket = so; | |
| 71 | insque(rp, &rawcb); | |
| 72 | so->so_pcb = (caddr_t)rp; | |
| 73 | rp->rcb_pcb = 0; | |
| 74 | ||
| 75 | if (addr) | |
| 668cc26d | 76 | bcopy((caddr_t)addr, (caddr_t)&so->so_addr, sizeof(*addr)); |
| 785d93ac BJ |
77 | return (0); |
| 78 | bad2: | |
| 79 | sbrelease(&so->so_snd); | |
| 80 | bad: | |
| 81 | (void) m_free(m); | |
| 82 | return (ENOBUFS); | |
| 83 | } | |
| 84 | ||
| 85 | /* | |
| 86 | * Detach the raw connection block and discard | |
| 87 | * socket resources. | |
| 88 | */ | |
| 89 | raw_detach(rp) | |
| 90 | register struct rawcb *rp; | |
| 91 | { | |
| 92 | struct socket *so = rp->rcb_socket; | |
| 93 | ||
| 94 | COUNT(RAW_DETACH); | |
| 785d93ac BJ |
95 | so->so_pcb = 0; |
| 96 | sofree(so); | |
| 97 | remque(rp); | |
| 668cc26d | 98 | m_freem(dtom(rp)); |
| 785d93ac BJ |
99 | } |
| 100 | ||
| 101 | /* | |
| 102 | * Disconnect and possibly release resources. | |
| 103 | */ | |
| 104 | raw_disconnect(rp) | |
| 105 | struct rawcb *rp; | |
| 106 | { | |
| 107 | COUNT(RAW_DISCONNECT); | |
| 785d93ac BJ |
108 | rp->rcb_flags &= ~RAW_ADDR; |
| 109 | if (rp->rcb_socket->so_state & SS_USERGONE) | |
| 110 | raw_detach(rp); | |
| 111 | } | |
| 112 | ||
| 113 | /* | |
| 114 | * Associate a peer's address with a | |
| 115 | * raw connection block. | |
| 116 | */ | |
| 117 | raw_connaddr(rp, addr) | |
| 118 | struct rawcb *rp; | |
| 119 | struct sockaddr *addr; | |
| 120 | { | |
| 121 | COUNT(RAW_CONNADDR); | |
| 668cc26d | 122 | bcopy((caddr_t)addr, (caddr_t)&rp->rcb_addr, sizeof(struct sockaddr)); |
| 785d93ac BJ |
123 | rp->rcb_flags |= RAW_ADDR; |
| 124 | } |