Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* net/atm/addr.c - Local ATM address registry */ |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | ||
5 | #include <linux/atm.h> | |
6 | #include <linux/atmdev.h> | |
7 | #include <linux/sched.h> | |
8 | #include <asm/uaccess.h> | |
9 | ||
10 | #include "signaling.h" | |
11 | #include "addr.h" | |
12 | ||
13 | static int check_addr(struct sockaddr_atmsvc *addr) | |
14 | { | |
15 | int i; | |
16 | ||
17 | if (addr->sas_family != AF_ATMSVC) | |
18 | return -EAFNOSUPPORT; | |
19 | if (!*addr->sas_addr.pub) | |
20 | return *addr->sas_addr.prv ? 0 : -EINVAL; | |
21 | for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */ | |
22 | if (!addr->sas_addr.pub[i]) | |
23 | return 0; | |
24 | return -EINVAL; | |
25 | } | |
26 | ||
27 | static int identical(struct sockaddr_atmsvc *a, struct sockaddr_atmsvc *b) | |
28 | { | |
29 | if (*a->sas_addr.prv) | |
30 | if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN)) | |
31 | return 0; | |
32 | if (!*a->sas_addr.pub) | |
33 | return !*b->sas_addr.pub; | |
34 | if (!*b->sas_addr.pub) | |
35 | return 0; | |
36 | return !strcmp(a->sas_addr.pub, b->sas_addr.pub); | |
37 | } | |
38 | ||
39 | static void notify_sigd(struct atm_dev *dev) | |
40 | { | |
41 | struct sockaddr_atmpvc pvc; | |
42 | ||
43 | pvc.sap_addr.itf = dev->number; | |
44 | sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL); | |
45 | } | |
46 | ||
47 | void atm_reset_addr(struct atm_dev *dev) | |
48 | { | |
49 | unsigned long flags; | |
50 | struct atm_dev_addr *this, *p; | |
51 | ||
52 | spin_lock_irqsave(&dev->lock, flags); | |
53 | list_for_each_entry_safe(this, p, &dev->local, entry) | |
54 | kfree(this); | |
55 | spin_unlock_irqrestore(&dev->lock, flags); | |
56 | notify_sigd(dev); | |
57 | } | |
58 | ||
59 | int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr) | |
60 | { | |
61 | unsigned long flags; | |
62 | struct atm_dev_addr *this; | |
63 | int error; | |
64 | ||
65 | error = check_addr(addr); | |
66 | if (error) | |
67 | return error; | |
68 | spin_lock_irqsave(&dev->lock, flags); | |
69 | list_for_each_entry(this, &dev->local, entry) { | |
70 | if (identical(&this->addr, addr)) { | |
71 | spin_unlock_irqrestore(&dev->lock, flags); | |
72 | return -EEXIST; | |
73 | } | |
74 | } | |
75 | this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC); | |
76 | if (!this) { | |
77 | spin_unlock_irqrestore(&dev->lock, flags); | |
78 | return -ENOMEM; | |
79 | } | |
80 | this->addr = *addr; | |
81 | list_add(&this->entry, &dev->local); | |
82 | spin_unlock_irqrestore(&dev->lock, flags); | |
83 | notify_sigd(dev); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr) | |
88 | { | |
89 | unsigned long flags; | |
90 | struct atm_dev_addr *this; | |
91 | int error; | |
92 | ||
93 | error = check_addr(addr); | |
94 | if (error) | |
95 | return error; | |
96 | spin_lock_irqsave(&dev->lock, flags); | |
97 | list_for_each_entry(this, &dev->local, entry) { | |
98 | if (identical(&this->addr, addr)) { | |
99 | list_del(&this->entry); | |
100 | spin_unlock_irqrestore(&dev->lock, flags); | |
101 | kfree(this); | |
102 | notify_sigd(dev); | |
103 | return 0; | |
104 | } | |
105 | } | |
106 | spin_unlock_irqrestore(&dev->lock, flags); | |
107 | return -ENOENT; | |
108 | } | |
109 | ||
110 | int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf, | |
111 | size_t size) | |
112 | { | |
113 | unsigned long flags; | |
114 | struct atm_dev_addr *this; | |
115 | int total = 0, error; | |
116 | struct sockaddr_atmsvc *tmp_buf, *tmp_bufp; | |
117 | ||
118 | spin_lock_irqsave(&dev->lock, flags); | |
119 | list_for_each_entry(this, &dev->local, entry) | |
120 | total += sizeof(struct sockaddr_atmsvc); | |
121 | tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC); | |
122 | if (!tmp_buf) { | |
123 | spin_unlock_irqrestore(&dev->lock, flags); | |
124 | return -ENOMEM; | |
125 | } | |
126 | list_for_each_entry(this, &dev->local, entry) | |
127 | memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc)); | |
128 | spin_unlock_irqrestore(&dev->lock, flags); | |
129 | error = total > size ? -E2BIG : total; | |
130 | if (copy_to_user(buf, tmp_buf, total < size ? total : size)) | |
131 | error = -EFAULT; | |
132 | kfree(tmp_buf); | |
133 | return error; | |
134 | } |