This source file includes following definitions.
- loopback_xmit
- get_stats
- loopback_open
- loopback_init
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21 #include <linux/config.h>
22 #include <linux/kernel.h>
23 #include <linux/sched.h>
24 #include <linux/fs.h>
25 #include <linux/types.h>
26 #include <linux/string.h>
27 #include <linux/socket.h>
28 #include <linux/errno.h>
29 #include <linux/fcntl.h>
30 #include <linux/in.h>
31 #include <linux/if_ether.h>
32
33 #include <asm/system.h>
34 #include <asm/segment.h>
35 #include <asm/io.h>
36
37 #include <linux/inet.h>
38 #include <linux/netdevice.h>
39 #include <linux/etherdevice.h>
40 #include <linux/skbuff.h>
41
42
43 static int
44 loopback_xmit(struct sk_buff *skb, struct device *dev)
45 {
46 struct enet_statistics *stats = (struct enet_statistics *)dev->priv;
47 int done;
48
49 if (skb == NULL || dev == NULL) return(0);
50
51 cli();
52 if (dev->tbusy != 0) {
53 sti();
54 stats->tx_errors++;
55 return(1);
56 }
57 dev->tbusy = 1;
58 sti();
59
60 done = dev_rint(skb->data, skb->len, 0, dev);
61 if (skb->free) kfree_skb(skb, FREE_WRITE);
62
63 while (done != 1) {
64 done = dev_rint(NULL, 0, 0, dev);
65 }
66 stats->tx_packets++;
67
68 dev->tbusy = 0;
69
70 #if 1
71 __asm__("cmpl $0,_intr_count\n\t"
72 "jne 1f\n\t"
73 "movl _bh_active,%%eax\n\t"
74 "testl _bh_mask,%%eax\n\t"
75 "je 1f\n\t"
76 "incl _intr_count\n\t"
77 "call _do_bottom_half\n\t"
78 "decl _intr_count\n"
79 "1:"
80 :
81 :
82 : "ax", "dx", "cx");
83 #endif
84
85 return(0);
86 }
87
88 static struct enet_statistics *
89 get_stats(struct device *dev)
90 {
91 return (struct enet_statistics *)dev->priv;
92 }
93
94 static int loopback_open(struct device *dev)
95 {
96 dev->flags|=IFF_LOOPBACK;
97 return 0;
98 }
99
100
101 int
102 loopback_init(struct device *dev)
103 {
104 int i;
105
106 dev->mtu = 2000;
107 dev->tbusy = 0;
108 dev->hard_start_xmit = loopback_xmit;
109 dev->open = NULL;
110 #if 1
111 dev->hard_header = eth_header;
112 dev->hard_header_len = ETH_HLEN;
113 dev->addr_len = ETH_ALEN;
114 dev->type = ARPHRD_ETHER;
115 dev->type_trans = eth_type_trans;
116 dev->rebuild_header = eth_rebuild_header;
117 dev->open = loopback_open;
118 #else
119 dev->hard_header_length = 0;
120 dev->addr_len = 0;
121 dev->type = 0;
122 dev->hard_header = NULL;
123 dev->type_trans = NULL;
124 dev->rebuild_header = NULL;
125 #endif
126
127
128 dev->flags = IFF_LOOPBACK;
129 dev->family = AF_INET;
130 #ifdef CONFIG_INET
131 dev->pa_addr = in_aton("127.0.0.1");
132 dev->pa_brdaddr = in_aton("127.255.255.255");
133 dev->pa_mask = in_aton("255.0.0.0");
134 dev->pa_alen = sizeof(unsigned long);
135 #endif
136 dev->priv = kmalloc(sizeof(struct enet_statistics), GFP_KERNEL);
137 memset(dev->priv, 0, sizeof(struct enet_statistics));
138 dev->get_stats = get_stats;
139
140
141 for (i = 0; i < DEV_NUMBUFFS; i++)
142 skb_queue_head_init(&dev->buffs[i]);
143
144 return(0);
145 };