| 1 | /* net/atm/pvc.c - ATM PVC sockets */ |
| 2 | |
| 3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ |
| 4 | |
| 5 | |
| 6 | #include <linux/net.h> /* struct socket, struct proto_ops */ |
| 7 | #include <linux/atm.h> /* ATM stuff */ |
| 8 | #include <linux/atmdev.h> /* ATM devices */ |
| 9 | #include <linux/errno.h> /* error codes */ |
| 10 | #include <linux/kernel.h> /* printk */ |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/skbuff.h> |
| 13 | #include <linux/bitops.h> |
| 14 | #include <linux/export.h> |
| 15 | #include <net/sock.h> /* for sock_no_* */ |
| 16 | |
| 17 | #include "resources.h" /* devs and vccs */ |
| 18 | #include "common.h" /* common for PVCs and SVCs */ |
| 19 | |
| 20 | |
| 21 | static int pvc_shutdown(struct socket *sock, int how) |
| 22 | { |
| 23 | return 0; |
| 24 | } |
| 25 | |
| 26 | static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr, |
| 27 | int sockaddr_len) |
| 28 | { |
| 29 | struct sock *sk = sock->sk; |
| 30 | struct sockaddr_atmpvc *addr; |
| 31 | struct atm_vcc *vcc; |
| 32 | int error; |
| 33 | |
| 34 | if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) |
| 35 | return -EINVAL; |
| 36 | addr = (struct sockaddr_atmpvc *)sockaddr; |
| 37 | if (addr->sap_family != AF_ATMPVC) |
| 38 | return -EAFNOSUPPORT; |
| 39 | lock_sock(sk); |
| 40 | vcc = ATM_SD(sock); |
| 41 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { |
| 42 | error = -EBADFD; |
| 43 | goto out; |
| 44 | } |
| 45 | if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) { |
| 46 | if (vcc->vpi != ATM_VPI_UNSPEC) |
| 47 | addr->sap_addr.vpi = vcc->vpi; |
| 48 | if (vcc->vci != ATM_VCI_UNSPEC) |
| 49 | addr->sap_addr.vci = vcc->vci; |
| 50 | } |
| 51 | error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi, |
| 52 | addr->sap_addr.vci); |
| 53 | out: |
| 54 | release_sock(sk); |
| 55 | return error; |
| 56 | } |
| 57 | |
| 58 | static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr, |
| 59 | int sockaddr_len, int flags) |
| 60 | { |
| 61 | return pvc_bind(sock, sockaddr, sockaddr_len); |
| 62 | } |
| 63 | |
| 64 | static int pvc_setsockopt(struct socket *sock, int level, int optname, |
| 65 | char __user *optval, unsigned int optlen) |
| 66 | { |
| 67 | struct sock *sk = sock->sk; |
| 68 | int error; |
| 69 | |
| 70 | lock_sock(sk); |
| 71 | error = vcc_setsockopt(sock, level, optname, optval, optlen); |
| 72 | release_sock(sk); |
| 73 | return error; |
| 74 | } |
| 75 | |
| 76 | static int pvc_getsockopt(struct socket *sock, int level, int optname, |
| 77 | char __user *optval, int __user *optlen) |
| 78 | { |
| 79 | struct sock *sk = sock->sk; |
| 80 | int error; |
| 81 | |
| 82 | lock_sock(sk); |
| 83 | error = vcc_getsockopt(sock, level, optname, optval, optlen); |
| 84 | release_sock(sk); |
| 85 | return error; |
| 86 | } |
| 87 | |
| 88 | static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr, |
| 89 | int *sockaddr_len, int peer) |
| 90 | { |
| 91 | struct sockaddr_atmpvc *addr; |
| 92 | struct atm_vcc *vcc = ATM_SD(sock); |
| 93 | |
| 94 | if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags)) |
| 95 | return -ENOTCONN; |
| 96 | *sockaddr_len = sizeof(struct sockaddr_atmpvc); |
| 97 | addr = (struct sockaddr_atmpvc *)sockaddr; |
| 98 | memset(addr, 0, sizeof(*addr)); |
| 99 | addr->sap_family = AF_ATMPVC; |
| 100 | addr->sap_addr.itf = vcc->dev->number; |
| 101 | addr->sap_addr.vpi = vcc->vpi; |
| 102 | addr->sap_addr.vci = vcc->vci; |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | static const struct proto_ops pvc_proto_ops = { |
| 107 | .family = PF_ATMPVC, |
| 108 | .owner = THIS_MODULE, |
| 109 | |
| 110 | .release = vcc_release, |
| 111 | .bind = pvc_bind, |
| 112 | .connect = pvc_connect, |
| 113 | .socketpair = sock_no_socketpair, |
| 114 | .accept = sock_no_accept, |
| 115 | .getname = pvc_getname, |
| 116 | .poll = vcc_poll, |
| 117 | .ioctl = vcc_ioctl, |
| 118 | #ifdef CONFIG_COMPAT |
| 119 | .compat_ioctl = vcc_compat_ioctl, |
| 120 | #endif |
| 121 | .listen = sock_no_listen, |
| 122 | .shutdown = pvc_shutdown, |
| 123 | .setsockopt = pvc_setsockopt, |
| 124 | .getsockopt = pvc_getsockopt, |
| 125 | .sendmsg = vcc_sendmsg, |
| 126 | .recvmsg = vcc_recvmsg, |
| 127 | .mmap = sock_no_mmap, |
| 128 | .sendpage = sock_no_sendpage, |
| 129 | }; |
| 130 | |
| 131 | |
| 132 | static int pvc_create(struct net *net, struct socket *sock, int protocol, |
| 133 | int kern) |
| 134 | { |
| 135 | if (net != &init_net) |
| 136 | return -EAFNOSUPPORT; |
| 137 | |
| 138 | sock->ops = &pvc_proto_ops; |
| 139 | return vcc_create(net, sock, protocol, PF_ATMPVC, kern); |
| 140 | } |
| 141 | |
| 142 | static const struct net_proto_family pvc_family_ops = { |
| 143 | .family = PF_ATMPVC, |
| 144 | .create = pvc_create, |
| 145 | .owner = THIS_MODULE, |
| 146 | }; |
| 147 | |
| 148 | |
| 149 | /* |
| 150 | * Initialize the ATM PVC protocol family |
| 151 | */ |
| 152 | |
| 153 | |
| 154 | int __init atmpvc_init(void) |
| 155 | { |
| 156 | return sock_register(&pvc_family_ops); |
| 157 | } |
| 158 | |
| 159 | void atmpvc_exit(void) |
| 160 | { |
| 161 | sock_unregister(PF_ATMPVC); |
| 162 | } |