2 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
3 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
4 * Licensed under the GPL
11 #include <sys/socket.h>
12 #include <sys/types.h>
20 static struct mconsole_command commands[] = {
21 { "version", mconsole_version, 1 },
22 { "halt", mconsole_halt, 0 },
23 { "reboot", mconsole_reboot, 0 },
24 { "config", mconsole_config, 0 },
25 { "remove", mconsole_remove, 0 },
26 { "sysrq", mconsole_sysrq, 1 },
27 { "help", mconsole_help, 1 },
28 { "cad", mconsole_cad, 1 },
29 { "stop", mconsole_stop, 0 },
30 { "go", mconsole_go, 1 },
33 /* Initialized in mconsole_init, which is an initcall */
34 char mconsole_socket_name[256];
36 int mconsole_reply_v0(struct mc_request *req, char *reply)
42 iov.iov_len = strlen(reply);
44 msg.msg_name = &(req->origin);
45 msg.msg_namelen = req->originlen;
48 msg.msg_control = NULL;
49 msg.msg_controllen = 0;
52 return sendmsg(req->originating_fd, &msg, 0);
55 static struct mconsole_command *mconsole_parse(struct mc_request *req)
57 struct mconsole_command *cmd;
60 for(i=0;i<sizeof(commands)/sizeof(commands[0]);i++){
62 if(!strncmp(req->request.data, cmd->command,
63 strlen(cmd->command))){
70 #define MIN(a,b) ((a)<(b) ? (a):(b))
73 #define STRING(x) STRINGX(x)
75 int mconsole_get_request(int fd, struct mc_request *req)
79 req->originlen = sizeof(req->origin);
80 req->len = recvfrom(fd, &req->request, sizeof(req->request), 0,
81 (struct sockaddr *) req->origin, &req->originlen);
85 req->originating_fd = fd;
87 if(req->request.magic != MCONSOLE_MAGIC){
88 /* Unversioned request */
89 len = MIN(sizeof(req->request.data) - 1,
90 strlen((char *) &req->request));
91 memmove(req->request.data, &req->request, len);
92 req->request.data[len] = '\0';
94 req->request.magic = MCONSOLE_MAGIC;
95 req->request.version = 0;
96 req->request.len = len;
98 mconsole_reply_v0(req, "ERR Version 0 mconsole clients are "
99 "not supported by this driver");
103 if(req->request.len >= MCONSOLE_MAX_DATA){
104 mconsole_reply(req, "Request too large", 1, 0);
107 if(req->request.version != MCONSOLE_VERSION){
108 mconsole_reply(req, "This driver only supports version "
109 STRING(MCONSOLE_VERSION) " clients", 1, 0);
112 req->request.data[req->request.len] = '\0';
113 req->cmd = mconsole_parse(req);
114 if(req->cmd == NULL){
115 mconsole_reply(req, "Unknown command", 1, 0);
122 int mconsole_reply(struct mc_request *req, char *str, int err, int more)
124 struct mconsole_reply reply;
131 /* err can only be true on the first packet */
134 len = MIN(total, MCONSOLE_MAX_DATA - 1);
136 if(len == total) reply.more = more;
139 memcpy(reply.data, str, len);
140 reply.data[len] = '\0';
144 len = sizeof(reply) + reply.len - sizeof(reply.data);
146 n = sendto(req->originating_fd, &reply, len, 0,
147 (struct sockaddr *) req->origin, req->originlen);
149 if(n < 0) return(-errno);
154 int mconsole_unlink_socket(void)
156 unlink(mconsole_socket_name);
160 static int notify_sock = -1;
162 int mconsole_notify(char *sock_name, int type, const void *data, int len)
164 struct sockaddr_un target;
165 struct mconsole_notify packet;
170 notify_sock = socket(PF_UNIX, SOCK_DGRAM, 0);
172 printk("mconsole_notify - socket failed, errno = %d\n",
182 target.sun_family = AF_UNIX;
183 strcpy(target.sun_path, sock_name);
185 packet.magic = MCONSOLE_MAGIC;
186 packet.version = MCONSOLE_VERSION;
188 len = (len > sizeof(packet.data)) ? sizeof(packet.data) : len;
190 memcpy(packet.data, data, len);
193 len = sizeof(packet) + packet.len - sizeof(packet.data);
194 n = sendto(notify_sock, &packet, len, 0, (struct sockaddr *) &target,
197 printk("mconsole_notify - sendto failed, errno = %d\n", errno);
204 * Overrides for Emacs so that we follow Linus's tabbing style.
205 * Emacs will notice this stuff at the end of the file and automatically
206 * adjust the settings for this buffer only. This must remain at the end
208 * ---------------------------------------------------------------------------
210 * c-file-style: "linux"