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Diffstat (limited to 'arch/um/drivers/mcast_user.c')
-rw-r--r--arch/um/drivers/mcast_user.c165
1 files changed, 0 insertions, 165 deletions
diff --git a/arch/um/drivers/mcast_user.c b/arch/um/drivers/mcast_user.c
deleted file mode 100644
index ee19e91568a2..000000000000
--- a/arch/um/drivers/mcast_user.c
+++ /dev/null
@@ -1,165 +0,0 @@
1/*
2 * user-mode-linux networking multicast transport
3 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 * Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org>
5 *
6 * based on the existing uml-networking code, which is
7 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
8 * James Leu (jleu@mindspring.net).
9 * Copyright (C) 2001 by various other people who didn't put their name here.
10 *
11 * Licensed under the GPL.
12 *
13 */
14
15#include <unistd.h>
16#include <errno.h>
17#include <netinet/in.h>
18#include "kern_constants.h"
19#include "mcast.h"
20#include "net_user.h"
21#include "um_malloc.h"
22#include "user.h"
23
24static struct sockaddr_in *new_addr(char *addr, unsigned short port)
25{
26 struct sockaddr_in *sin;
27
28 sin = uml_kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
29 if (sin == NULL) {
30 printk(UM_KERN_ERR "new_addr: allocation of sockaddr_in "
31 "failed\n");
32 return NULL;
33 }
34 sin->sin_family = AF_INET;
35 sin->sin_addr.s_addr = in_aton(addr);
36 sin->sin_port = htons(port);
37 return sin;
38}
39
40static int mcast_user_init(void *data, void *dev)
41{
42 struct mcast_data *pri = data;
43
44 pri->mcast_addr = new_addr(pri->addr, pri->port);
45 pri->dev = dev;
46 return 0;
47}
48
49static void mcast_remove(void *data)
50{
51 struct mcast_data *pri = data;
52
53 kfree(pri->mcast_addr);
54 pri->mcast_addr = NULL;
55}
56
57static int mcast_open(void *data)
58{
59 struct mcast_data *pri = data;
60 struct sockaddr_in *sin = pri->mcast_addr;
61 struct ip_mreq mreq;
62 int fd, yes = 1, err = -EINVAL;
63
64
65 if ((sin->sin_addr.s_addr == 0) || (sin->sin_port == 0))
66 goto out;
67
68 fd = socket(AF_INET, SOCK_DGRAM, 0);
69
70 if (fd < 0) {
71 err = -errno;
72 printk(UM_KERN_ERR "mcast_open : data socket failed, "
73 "errno = %d\n", errno);
74 goto out;
75 }
76
77 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
78 err = -errno;
79 printk(UM_KERN_ERR "mcast_open: SO_REUSEADDR failed, "
80 "errno = %d\n", errno);
81 goto out_close;
82 }
83
84 /* set ttl according to config */
85 if (setsockopt(fd, SOL_IP, IP_MULTICAST_TTL, &pri->ttl,
86 sizeof(pri->ttl)) < 0) {
87 err = -errno;
88 printk(UM_KERN_ERR "mcast_open: IP_MULTICAST_TTL failed, "
89 "error = %d\n", errno);
90 goto out_close;
91 }
92
93 /* set LOOP, so data does get fed back to local sockets */
94 if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
95 err = -errno;
96 printk(UM_KERN_ERR "mcast_open: IP_MULTICAST_LOOP failed, "
97 "error = %d\n", errno);
98 goto out_close;
99 }
100
101 /* bind socket to mcast address */
102 if (bind(fd, (struct sockaddr *) sin, sizeof(*sin)) < 0) {
103 err = -errno;
104 printk(UM_KERN_ERR "mcast_open : data bind failed, "
105 "errno = %d\n", errno);
106 goto out_close;
107 }
108
109 /* subscribe to the multicast group */
110 mreq.imr_multiaddr.s_addr = sin->sin_addr.s_addr;
111 mreq.imr_interface.s_addr = 0;
112 if (setsockopt(fd, SOL_IP, IP_ADD_MEMBERSHIP,
113 &mreq, sizeof(mreq)) < 0) {
114 err = -errno;
115 printk(UM_KERN_ERR "mcast_open: IP_ADD_MEMBERSHIP failed, "
116 "error = %d\n", errno);
117 printk(UM_KERN_ERR "There appears not to be a multicast-"
118 "capable network interface on the host.\n");
119 printk(UM_KERN_ERR "eth0 should be configured in order to use "
120 "the multicast transport.\n");
121 goto out_close;
122 }
123
124 return fd;
125
126 out_close:
127 close(fd);
128 out:
129 return err;
130}
131
132static void mcast_close(int fd, void *data)
133{
134 struct ip_mreq mreq;
135 struct mcast_data *pri = data;
136 struct sockaddr_in *sin = pri->mcast_addr;
137
138 mreq.imr_multiaddr.s_addr = sin->sin_addr.s_addr;
139 mreq.imr_interface.s_addr = 0;
140 if (setsockopt(fd, SOL_IP, IP_DROP_MEMBERSHIP,
141 &mreq, sizeof(mreq)) < 0) {
142 printk(UM_KERN_ERR "mcast_open: IP_DROP_MEMBERSHIP failed, "
143 "error = %d\n", errno);
144 }
145
146 close(fd);
147}
148
149int mcast_user_write(int fd, void *buf, int len, struct mcast_data *pri)
150{
151 struct sockaddr_in *data_addr = pri->mcast_addr;
152
153 return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));
154}
155
156const struct net_user_info mcast_user_info = {
157 .init = mcast_user_init,
158 .open = mcast_open,
159 .close = mcast_close,
160 .remove = mcast_remove,
161 .add_address = NULL,
162 .delete_address = NULL,
163 .mtu = ETH_MAX_PACKET,
164 .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
165};
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-16 11:26:07 -0400