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 } 163