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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | /* net/atm/addr.c - Local ATM address registry */ /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ #include <linux/atm.h> #include <linux/atmdev.h> #include <linux/sched.h> #include <asm/uaccess.h> #include "signaling.h" #include "addr.h" static int check_addr(struct sockaddr_atmsvc *addr) { int i; if (addr->sas_family != AF_ATMSVC) return -EAFNOSUPPORT; if (!*addr->sas_addr.pub) return *addr->sas_addr.prv ? 0 : -EINVAL; for (i = 1; i < ATM_E164_LEN+1; i++) /* make sure it's \0-terminated */ if (!addr->sas_addr.pub[i]) return 0; return -EINVAL; } static int identical(struct sockaddr_atmsvc *a,struct sockaddr_atmsvc *b) { if (*a->sas_addr.prv) if (memcmp(a->sas_addr.prv,b->sas_addr.prv,ATM_ESA_LEN)) return 0; if (!*a->sas_addr.pub) return !*b->sas_addr.pub; if (!*b->sas_addr.pub) return 0; return !strcmp(a->sas_addr.pub,b->sas_addr.pub); } static void notify_sigd(struct atm_dev *dev) { struct sockaddr_atmpvc pvc; pvc.sap_addr.itf = dev->number; sigd_enq(NULL,as_itf_notify,NULL,&pvc,NULL); } void atm_reset_addr(struct atm_dev *dev) { unsigned long flags; struct atm_dev_addr *this; spin_lock_irqsave(&dev->lock, flags); while (dev->local) { this = dev->local; dev->local = this->next; kfree(this); } spin_unlock_irqrestore(&dev->lock, flags); notify_sigd(dev); } int atm_add_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr) { unsigned long flags; struct atm_dev_addr **walk; int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); for (walk = &dev->local; *walk; walk = &(*walk)->next) if (identical(&(*walk)->addr,addr)) { spin_unlock_irqrestore(&dev->lock, flags); return -EEXIST; } *walk = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC); if (!*walk) { spin_unlock_irqrestore(&dev->lock, flags); return -ENOMEM; } (*walk)->addr = *addr; (*walk)->next = NULL; spin_unlock_irqrestore(&dev->lock, flags); notify_sigd(dev); return 0; } int atm_del_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr) { unsigned long flags; struct atm_dev_addr **walk,*this; int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); for (walk = &dev->local; *walk; walk = &(*walk)->next) if (identical(&(*walk)->addr,addr)) break; if (!*walk) { spin_unlock_irqrestore(&dev->lock, flags); return -ENOENT; } this = *walk; *walk = this->next; kfree(this); spin_unlock_irqrestore(&dev->lock, flags); notify_sigd(dev); return 0; } int atm_get_addr(struct atm_dev *dev,struct sockaddr_atmsvc *u_buf,int size) { unsigned long flags; struct atm_dev_addr *walk; int total; spin_lock_irqsave(&dev->lock, flags); total = 0; for (walk = dev->local; walk; walk = walk->next) { total += sizeof(struct sockaddr_atmsvc); if (total > size) { spin_unlock_irqrestore(&dev->lock, flags); return -E2BIG; } if (copy_to_user(u_buf,&walk->addr, sizeof(struct sockaddr_atmsvc))) { spin_unlock_irqrestore(&dev->lock, flags); return -EFAULT; } u_buf++; } spin_unlock_irqrestore(&dev->lock, flags); return total; } |