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