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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | /* 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 <asm/uaccess.h> #include "signaling.h" #include "addr.h" static int check_addr(const 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(const struct sockaddr_atmsvc *a, const 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(const 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, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this, *p; struct list_head *head; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry_safe(this, p, head, entry) { list_del(&this->entry); kfree(this); } spin_unlock_irqrestore(&dev->lock, flags); if (head == &dev->local) notify_sigd(dev); } int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this; struct list_head *head; int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) { if (identical(&this->addr, addr)) { spin_unlock_irqrestore(&dev->lock, flags); return -EEXIST; } } this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC); if (!this) { spin_unlock_irqrestore(&dev->lock, flags); return -ENOMEM; } this->addr = *addr; list_add(&this->entry, head); spin_unlock_irqrestore(&dev->lock, flags); if (head == &dev->local) notify_sigd(dev); return 0; } int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this; struct list_head *head; int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) { if (identical(&this->addr, addr)) { list_del(&this->entry); spin_unlock_irqrestore(&dev->lock, flags); kfree(this); if (head == &dev->local) notify_sigd(dev); return 0; } } spin_unlock_irqrestore(&dev->lock, flags); return -ENOENT; } int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf, size_t size, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this; struct list_head *head; int total = 0, error; struct sockaddr_atmsvc *tmp_buf, *tmp_bufp; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) total += sizeof(struct sockaddr_atmsvc); tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC); if (!tmp_buf) { spin_unlock_irqrestore(&dev->lock, flags); return -ENOMEM; } list_for_each_entry(this, head, entry) memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc)); spin_unlock_irqrestore(&dev->lock, flags); error = total > size ? -E2BIG : total; if (copy_to_user(buf, tmp_buf, total < size ? total : size)) error = -EFAULT; kfree(tmp_buf); return error; } |