2 * Copyright (c) 1997, 1998 Adrian Sun (asun@zoology.washington.edu)
3 * All rights reserved. See COPYRIGHT.
5 * this provides both proto_open() and proto_close() to account for
6 * protocol specific initialization and shutdown procedures. all the
7 * read/write stuff is done in dsi_stream.c. */
11 #endif /* HAVE_CONFIG_H */
13 #define USE_TCP_NODELAY
22 #endif /* HAVE_NETDB_H */
23 #include <sys/types.h>
25 #include <sys/socket.h>
28 #include <sys/ioctl.h>
31 #include <net/route.h>
34 #include <netinet/tcp.h>
35 #include <netinet/in.h>
36 #include <arpa/inet.h>
39 #include <atalk/logger.h>
42 #include <sys/sockio.h>
47 int allow_severity = log_info;
48 int deny_severity = log_warning;
51 #include <atalk/dsi.h>
52 #include <atalk/compat.h>
53 #include <atalk/util.h>
54 #include <atalk/errchk.h>
56 #include "dsi_private.h"
58 #define min(a,b) ((a) < (b) ? (a) : (b))
60 #ifndef DSI_TCPMAXPEND
61 #define DSI_TCPMAXPEND 20 /* max # of pending connections */
62 #endif /* DSI_TCPMAXPEND */
64 #ifndef DSI_TCPTIMEOUT
65 #define DSI_TCPTIMEOUT 120 /* timeout in seconds for connections */
66 #endif /* ! DSI_TCPTIMEOUT */
69 /* FIXME/SOCKLEN_T: socklen_t is a unix98 feature. */
71 #define SOCKLEN_T unsigned int
72 #endif /* ! SOCKLEN_T */
74 static void dsi_tcp_close(DSI *dsi)
76 if (dsi->socket == -1)
83 /* alarm handler for tcp_open */
84 static void timeout_handler(int sig _U_)
86 LOG(log_error, logtype_dsi, "dsi_tcp_open: connection timed out");
90 static struct itimerval itimer;
91 /* accept the socket and do a little sanity checking */
92 static int dsi_tcp_open(DSI *dsi)
97 len = sizeof(dsi->client);
98 dsi->socket = accept(dsi->serversock, (struct sockaddr *) &dsi->client, &len);
102 struct request_info req;
103 request_init(&req, RQ_DAEMON, dsi->program, RQ_FILE, dsi->socket, NULL);
105 if (!hosts_access(&req)) {
106 LOG(deny_severity, logtype_dsi, "refused connect from %s", eval_client(&req));
108 errno = ECONNREFUSED;
117 getitimer(ITIMER_PROF, &itimer);
118 if (0 == (pid = fork()) ) { /* child */
119 static struct itimerval timer = {{0, 0}, {DSI_TCPTIMEOUT, 0}};
120 struct sigaction newact, oldact;
121 uint8_t block[DSI_BLOCKSIZ];
124 /* Immediateyl mark globally that we're a child now */
128 server_reset_signal();
131 /* install an alarm to deal with non-responsive connections */
132 newact.sa_handler = timeout_handler;
133 sigemptyset(&newact.sa_mask);
135 sigemptyset(&oldact.sa_mask);
137 setitimer(ITIMER_PROF, &itimer, NULL);
139 if ((sigaction(SIGALRM, &newact, &oldact) < 0) ||
140 (setitimer(ITIMER_REAL, &timer, NULL) < 0)) {
141 LOG(log_error, logtype_dsi, "dsi_tcp_open: %s", strerror(errno));
146 /* read in commands. this is similar to dsi_receive except
147 * for the fact that we do some sanity checking to prevent
148 * delinquent connections from causing mischief. */
150 /* read in the first two bytes */
151 len = dsi_stream_read(dsi, block, 2);
153 /* connection already closed, don't log it (normal OSX 10.3 behaviour) */
156 if (len < 2 || (block[0] > DSIFL_MAX) || (block[1] > DSIFUNC_MAX)) {
157 LOG(log_error, logtype_dsi, "dsi_tcp_open: invalid header");
161 /* read in the rest of the header */
163 while (stored < DSI_BLOCKSIZ) {
164 len = dsi_stream_read(dsi, block + stored, sizeof(block) - stored);
168 LOG(log_error, logtype_dsi, "dsi_tcp_open: stream_read: %s", strerror(errno));
173 dsi->header.dsi_flags = block[0];
174 dsi->header.dsi_command = block[1];
175 memcpy(&dsi->header.dsi_requestID, block + 2,
176 sizeof(dsi->header.dsi_requestID));
177 memcpy(&dsi->header.dsi_code, block + 4, sizeof(dsi->header.dsi_code));
178 memcpy(&dsi->header.dsi_len, block + 8, sizeof(dsi->header.dsi_len));
179 memcpy(&dsi->header.dsi_reserved, block + 12,
180 sizeof(dsi->header.dsi_reserved));
181 dsi->clientID = ntohs(dsi->header.dsi_requestID);
183 /* make sure we don't over-write our buffers. */
184 dsi->cmdlen = min(ntohl(dsi->header.dsi_len), DSI_CMDSIZ);
187 while (stored < dsi->cmdlen) {
188 len = dsi_stream_read(dsi, dsi->commands + stored, dsi->cmdlen - stored);
192 LOG(log_error, logtype_dsi, "dsi_tcp_open: stream_read: %s", strerror(errno));
197 /* stop timer and restore signal handler */
199 memset(&timer, 0, sizeof(timer));
200 setitimer(ITIMER_REAL, &timer, NULL);
201 sigaction(SIGALRM, &oldact, NULL);
204 LOG(log_info, logtype_dsi, "AFP/TCP session from %s:%u",
205 getip_string((struct sockaddr *)&dsi->client),
206 getip_port((struct sockaddr *)&dsi->client));
209 /* send back our pid */
213 /* get it from the interface list */
218 static void guess_interface(DSI *dsi, const char *hostname, const char *port)
221 char **start, **list;
223 struct sockaddr_in *sa = (struct sockaddr_in *)&dsi->server;
225 start = list = getifacelist();
229 fd = socket(PF_INET, SOCK_STREAM, 0);
231 while (list && *list) {
232 strlcpy(ifr.ifr_name, *list, sizeof(ifr.ifr_name));
236 if (ioctl(dsi->serversock, SIOCGIFFLAGS, &ifr) < 0)
239 if (ifr.ifr_flags & (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_SLAVE))
242 if (!(ifr.ifr_flags & (IFF_UP | IFF_RUNNING)) )
245 if (ioctl(fd, SIOCGIFADDR, &ifr) < 0)
248 memset(&dsi->server, 0, sizeof(struct sockaddr_storage));
249 sa->sin_family = AF_INET;
250 sa->sin_port = htons(atoi(port));
251 sa->sin_addr = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
253 LOG(log_info, logtype_dsi, "dsi_tcp: '%s:%s' on interface '%s' will be used instead.",
254 getip_string((struct sockaddr *)&dsi->server), port, ifr.ifr_name);
257 LOG(log_info, logtype_dsi, "dsi_tcp (Chooser will not select afp/tcp) "
258 "Check to make sure %s is in /etc/hosts and the correct domain is in "
259 "/etc/resolv.conf: %s", hostname, strerror(errno));
263 freeifacelist(start);
267 #ifndef AI_NUMERICSERV
268 #define AI_NUMERICSERV 0
271 /* this needs to accept passed in addresses */
272 int dsi_tcp_init(DSI *dsi, const char *hostname, const char *inaddress, const char *inport)
276 char *p, *address = NULL;
277 struct addrinfo hints, *servinfo, *p;
279 /* Check whether address is of the from IP:PORT and split */
282 if (address && strchr(address, ':')) {
283 EC_NULL_LOG( address = strdup(inaddress) );
284 p = strchr(address, ':');
289 /* Prepare hint for getaddrinfo */
290 memset(&hints, 0, sizeof hints);
291 #if !defined(FREEBSD)
292 hints.ai_family = AF_UNSPEC;
294 hints.ai_socktype = SOCK_STREAM;
295 hints.ai_flags = AI_NUMERICSERV;
298 hints.ai_flags |= AI_PASSIVE;
300 hints.ai_family = AF_INET6;
303 hints.ai_flags |= AI_NUMERICHOST;
305 hints.ai_family = AF_UNSPEC;
308 if ((ret = getaddrinfo(address ? address : NULL, port, &hints, &servinfo)) != 0) {
309 LOG(log_error, logtype_dsi, "dsi_tcp_init: getaddrinfo: %s\n", gai_strerror(ret));
313 /* create a socket */
315 dsi->serversock = -1;
317 /* loop through all the results and bind to the first we can */
318 for (p = servinfo; p != NULL; p = p->ai_next) {
319 if ((dsi->serversock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
320 LOG(log_info, logtype_dsi, "dsi_tcp_init: socket: %s", strerror(errno));
325 * Set some socket options:
326 * SO_REUSEADDR deals w/ quick close/opens
327 * TCP_NODELAY diables Nagle
331 setsockopt(dsi->serversock, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof(flag));
333 #if defined(FREEBSD) && defined(IPV6_BINDV6ONLY)
335 setsockopt(dsi->serversock, IPPROTO_IPV6, IPV6_BINDV6ONLY, (char *)&on, sizeof (on));
338 #ifdef USE_TCP_NODELAY
340 #define SOL_TCP IPPROTO_TCP
343 setsockopt(dsi->serversock, SOL_TCP, TCP_NODELAY, &flag, sizeof(flag));
344 #endif /* USE_TCP_NODELAY */
346 if (bind(dsi->serversock, p->ai_addr, p->ai_addrlen) == -1) {
347 close(dsi->serversock);
348 LOG(log_info, logtype_dsi, "dsi_tcp_init: bind: %s\n", strerror(errno));
352 if (listen(dsi->serversock, DSI_TCPMAXPEND) < 0) {
353 close(dsi->serversock);
354 LOG(log_info, logtype_dsi, "dsi_tcp_init: listen: %s\n", strerror(errno));
362 LOG(log_error, logtype_dsi, "dsi_tcp_init: no suitable network config for TCP socket");
363 freeaddrinfo(servinfo);
367 /* Copy struct sockaddr to struct sockaddr_storage */
368 memcpy(&dsi->server, p->ai_addr, p->ai_addrlen);
369 freeaddrinfo(servinfo);
372 /* Point protocol specific functions to tcp versions */
373 dsi->proto_open = dsi_tcp_open;
374 dsi->proto_close = dsi_tcp_close;
376 /* get real address for GetStatus. */
379 /* address is a parameter, use it 'as is' */
383 /* Prepare hint for getaddrinfo */
384 memset(&hints, 0, sizeof hints);
385 hints.ai_family = AF_UNSPEC;
386 hints.ai_socktype = SOCK_STREAM;
388 if ((ret = getaddrinfo(hostname, port, &hints, &servinfo)) != 0) {
389 LOG(log_info, logtype_dsi, "dsi_tcp_init: getaddrinfo '%s': %s\n", hostname, gai_strerror(ret));
393 for (p = servinfo; p != NULL; p = p->ai_next) {
394 if (p->ai_family == AF_INET) { // IPv4
395 struct sockaddr_in *ipv4 = (struct sockaddr_in *)p->ai_addr;
396 if ( (ipv4->sin_addr.s_addr & htonl(0x7f000000)) != htonl(0x7f000000) )
399 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)p->ai_addr;
400 unsigned char ipv6loopb[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
401 if ((memcmp(ipv6->sin6_addr.s6_addr, ipv6loopb, 16)) != 0)
407 /* Store found address in dsi->server */
408 memcpy(&dsi->server, p->ai_addr, p->ai_addrlen);
409 freeaddrinfo(servinfo);
412 LOG(log_info, logtype_dsi, "dsi_tcp: hostname '%s' resolves to loopback address", hostname);
413 freeaddrinfo(servinfo);
416 guess_interface(dsi, hostname, port ? port : "548");