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 static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr, 26 int sockaddr_len) 27 { 28 struct sock *sk = sock->sk; 29 struct sockaddr_atmpvc *addr; 30 struct atm_vcc *vcc; 31 int error; 32 33 if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) 34 return -EINVAL; 35 addr = (struct sockaddr_atmpvc *)sockaddr; 36 if (addr->sap_family != AF_ATMPVC) 37 return -EAFNOSUPPORT; 38 lock_sock(sk); 39 vcc = ATM_SD(sock); 40 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { 41 error = -EBADFD; 42 goto out; 43 } 44 if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) { 45 if (vcc->vpi != ATM_VPI_UNSPEC) 46 addr->sap_addr.vpi = vcc->vpi; 47 if (vcc->vci != ATM_VCI_UNSPEC) 48 addr->sap_addr.vci = vcc->vci; 49 } 50 error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi, 51 addr->sap_addr.vci); 52 out: 53 release_sock(sk); 54 return error; 55 } 56 57 static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr, 58 int sockaddr_len, int flags) 59 { 60 return pvc_bind(sock, sockaddr, sockaddr_len); 61 } 62 63 static int pvc_setsockopt(struct socket *sock, int level, int optname, 64 char __user *optval, unsigned int optlen) 65 { 66 struct sock *sk = sock->sk; 67 int error; 68 69 lock_sock(sk); 70 error = vcc_setsockopt(sock, level, optname, optval, optlen); 71 release_sock(sk); 72 return error; 73 } 74 75 static int pvc_getsockopt(struct socket *sock, int level, int optname, 76 char __user *optval, int __user *optlen) 77 { 78 struct sock *sk = sock->sk; 79 int error; 80 81 lock_sock(sk); 82 error = vcc_getsockopt(sock, level, optname, optval, optlen); 83 release_sock(sk); 84 return error; 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)) 94 return -ENOTCONN; 95 *sockaddr_len = sizeof(struct sockaddr_atmpvc); 96 addr = (struct sockaddr_atmpvc *)sockaddr; 97 addr->sap_family = AF_ATMPVC; 98 addr->sap_addr.itf = vcc->dev->number; 99 addr->sap_addr.vpi = vcc->vpi; 100 addr->sap_addr.vci = vcc->vci; 101 return 0; 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 static const struct net_proto_family pvc_family_ops = { 141 .family = PF_ATMPVC, 142 .create = pvc_create, 143 .owner = THIS_MODULE, 144 }; 145 146 147 /* 148 * Initialize the ATM PVC protocol family 149 */ 150 151 152 int __init atmpvc_init(void) 153 { 154 return sock_register(&pvc_family_ops); 155 } 156 157 void atmpvc_exit(void) 158 { 159 sock_unregister(PF_ATMPVC); 160 } 161