/*
- * $Id: dsi_tcp.c,v 1.10 2005-04-28 20:50:02 bfernhomberg Exp $
- *
* Copyright (c) 1997, 1998 Adrian Sun (asun@zoology.washington.edu)
* All rights reserved. See COPYRIGHT.
*
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#ifdef HAVE_UNISTD_H
#include <unistd.h>
-#endif /* HAVE_UNISTD_H */
#include <errno.h>
#ifdef HAVE_NETDB_H
#include <netdb.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
-
-#ifdef HAVE_STDINT_H
#include <stdint.h>
-#endif /* HAVE_STDINT_H */
#include <sys/ioctl.h>
#ifdef TRU64
#include <atalk/dsi.h>
#include <atalk/compat.h>
#include <atalk/util.h>
-#include <netatalk/endian.h>
-#include "dsi_private.h"
+#include <atalk/errchk.h>
#define min(a,b) ((a) < (b) ? (a) : (b))
static void dsi_tcp_close(DSI *dsi)
{
- if (dsi->socket == -1)
- return;
+ if (dsi->socket == -1)
+ return;
- close(dsi->socket);
- dsi->socket = -1;
+ close(dsi->socket);
+ dsi->socket = -1;
}
/* alarm handler for tcp_open */
-static void timeout_handler()
+static void timeout_handler(int sig _U_)
{
- LOG(log_error, logtype_default, "dsi_tcp_open: connection timed out");
- exit(EXITERR_CLNT);
+ LOG(log_error, logtype_dsi, "dsi_tcp_open: connection timed out");
+ exit(EXITERR_CLNT);
}
-#ifdef ATACC
-#define fork aTaC_fork
-#endif
-
static struct itimerval itimer;
/* accept the socket and do a little sanity checking */
static int dsi_tcp_open(DSI *dsi)
{
- pid_t pid;
- SOCKLEN_T len;
+ pid_t pid;
+ SOCKLEN_T len;
- len = sizeof(dsi->client);
- dsi->socket = accept(dsi->serversock, (struct sockaddr *) &dsi->client,
- &len);
+ len = sizeof(dsi->client);
+ dsi->socket = accept(dsi->serversock, (struct sockaddr *) &dsi->client, &len);
#ifdef TCPWRAP
- {
- struct request_info req;
- request_init(&req, RQ_DAEMON, dsi->program, RQ_FILE, dsi->socket, NULL);
- fromhost(&req);
- if (!hosts_access(&req)) {
- LOG(deny_severity, logtype_default, "refused connect from %s", eval_client(&req));
- close(dsi->socket);
- errno = ECONNREFUSED;
- dsi->socket = -1;
+ {
+ struct request_info req;
+ request_init(&req, RQ_DAEMON, dsi->program, RQ_FILE, dsi->socket, NULL);
+ fromhost(&req);
+ if (!hosts_access(&req)) {
+ LOG(deny_severity, logtype_dsi, "refused connect from %s", eval_client(&req));
+ close(dsi->socket);
+ errno = ECONNREFUSED;
+ dsi->socket = -1;
+ }
}
- }
#endif /* TCPWRAP */
- if (dsi->socket < 0)
- return -1;
-
- getitimer(ITIMER_PROF, &itimer);
- if (0 == (pid = fork()) ) { /* child */
- static struct itimerval timer = {{0, 0}, {DSI_TCPTIMEOUT, 0}};
- struct sigaction newact, oldact;
- u_int8_t block[DSI_BLOCKSIZ];
- size_t stored;
-
- /* reset signals */
- server_reset_signal();
-
- /* install an alarm to deal with non-responsive connections */
- newact.sa_handler = timeout_handler;
- sigemptyset(&newact.sa_mask);
- newact.sa_flags = 0;
- sigemptyset(&oldact.sa_mask);
- oldact.sa_flags = 0;
- setitimer(ITIMER_PROF, &itimer, NULL);
-
- if ((sigaction(SIGALRM, &newact, &oldact) < 0) ||
- (setitimer(ITIMER_REAL, &timer, NULL) < 0)) {
- LOG(log_error, logtype_default, "dsi_tcp_open: %s", strerror(errno));
- exit(EXITERR_SYS);
- }
-
- /* read in commands. this is similar to dsi_receive except
- * for the fact that we do some sanity checking to prevent
- * delinquent connections from causing mischief. */
-
- /* read in the first two bytes */
- len = dsi_stream_read(dsi, block, 2);
- if (!len ) {
- /* connection already closed, don't log it (normal OSX 10.3 behaviour) */
- exit(EXITERR_CLNT);
- }
- if (len < 2 || (block[0] > DSIFL_MAX) || (block[1] > DSIFUNC_MAX)) {
- LOG(log_error, logtype_default, "dsi_tcp_open: invalid header");
- exit(EXITERR_CLNT);
- }
-
- /* read in the rest of the header */
- stored = 2;
- while (stored < DSI_BLOCKSIZ) {
- len = dsi_stream_read(dsi, block + stored, sizeof(block) - stored);
- if (len > 0)
- stored += len;
- else {
- LOG(log_error, logtype_default, "dsi_tcp_open: stream_read: %s", strerror(errno));
- exit(EXITERR_CLNT);
- }
+ if (dsi->socket < 0)
+ return -1;
+
+ getitimer(ITIMER_PROF, &itimer);
+ if (0 == (pid = fork()) ) { /* child */
+ static struct itimerval timer = {{0, 0}, {DSI_TCPTIMEOUT, 0}};
+ struct sigaction newact, oldact;
+ uint8_t block[DSI_BLOCKSIZ];
+ size_t stored;
+
+ /* Immediateyl mark globally that we're a child now */
+ parent_or_child = 1;
+
+ /* reset signals */
+ server_reset_signal();
+
+#ifndef DEBUGGING
+ /* install an alarm to deal with non-responsive connections */
+ newact.sa_handler = timeout_handler;
+ sigemptyset(&newact.sa_mask);
+ newact.sa_flags = 0;
+ sigemptyset(&oldact.sa_mask);
+ oldact.sa_flags = 0;
+ setitimer(ITIMER_PROF, &itimer, NULL);
+
+ if ((sigaction(SIGALRM, &newact, &oldact) < 0) ||
+ (setitimer(ITIMER_REAL, &timer, NULL) < 0)) {
+ LOG(log_error, logtype_dsi, "dsi_tcp_open: %s", strerror(errno));
+ exit(EXITERR_SYS);
+ }
+#endif
+
+ /* read in commands. this is similar to dsi_receive except
+ * for the fact that we do some sanity checking to prevent
+ * delinquent connections from causing mischief. */
+
+ /* read in the first two bytes */
+ len = dsi_stream_read(dsi, block, 2);
+ if (!len ) {
+ /* connection already closed, don't log it (normal OSX 10.3 behaviour) */
+ exit(EXITERR_CLNT);
+ }
+ if (len < 2 || (block[0] > DSIFL_MAX) || (block[1] > DSIFUNC_MAX)) {
+ LOG(log_error, logtype_dsi, "dsi_tcp_open: invalid header");
+ exit(EXITERR_CLNT);
+ }
+
+ /* read in the rest of the header */
+ stored = 2;
+ while (stored < DSI_BLOCKSIZ) {
+ len = dsi_stream_read(dsi, block + stored, sizeof(block) - stored);
+ if (len > 0)
+ stored += len;
+ else {
+ LOG(log_error, logtype_dsi, "dsi_tcp_open: stream_read: %s", strerror(errno));
+ exit(EXITERR_CLNT);
+ }
+ }
+
+ dsi->header.dsi_flags = block[0];
+ dsi->header.dsi_command = block[1];
+ memcpy(&dsi->header.dsi_requestID, block + 2,
+ sizeof(dsi->header.dsi_requestID));
+ memcpy(&dsi->header.dsi_code, block + 4, sizeof(dsi->header.dsi_code));
+ memcpy(&dsi->header.dsi_len, block + 8, sizeof(dsi->header.dsi_len));
+ memcpy(&dsi->header.dsi_reserved, block + 12,
+ sizeof(dsi->header.dsi_reserved));
+ dsi->clientID = ntohs(dsi->header.dsi_requestID);
+
+ /* make sure we don't over-write our buffers. */
+ dsi->cmdlen = min(ntohl(dsi->header.dsi_len), DSI_CMDSIZ);
+
+ stored = 0;
+ while (stored < dsi->cmdlen) {
+ len = dsi_stream_read(dsi, dsi->commands + stored, dsi->cmdlen - stored);
+ if (len > 0)
+ stored += len;
+ else {
+ LOG(log_error, logtype_dsi, "dsi_tcp_open: stream_read: %s", strerror(errno));
+ exit(EXITERR_CLNT);
+ }
+ }
+
+ /* stop timer and restore signal handler */
+#ifndef DEBUGGING
+ memset(&timer, 0, sizeof(timer));
+ setitimer(ITIMER_REAL, &timer, NULL);
+ sigaction(SIGALRM, &oldact, NULL);
+#endif
+
+ LOG(log_info, logtype_dsi, "AFP/TCP session from %s:%u",
+ getip_string((struct sockaddr *)&dsi->client),
+ getip_port((struct sockaddr *)&dsi->client));
}
-
- dsi->header.dsi_flags = block[0];
- dsi->header.dsi_command = block[1];
- memcpy(&dsi->header.dsi_requestID, block + 2,
- sizeof(dsi->header.dsi_requestID));
- memcpy(&dsi->header.dsi_code, block + 4, sizeof(dsi->header.dsi_code));
- memcpy(&dsi->header.dsi_len, block + 8, sizeof(dsi->header.dsi_len));
- memcpy(&dsi->header.dsi_reserved, block + 12,
- sizeof(dsi->header.dsi_reserved));
- dsi->clientID = ntohs(dsi->header.dsi_requestID);
-
- /* make sure we don't over-write our buffers. */
- dsi->cmdlen = min(ntohl(dsi->header.dsi_len), DSI_CMDSIZ);
-
- stored = 0;
- while (stored < dsi->cmdlen) {
- len = dsi_stream_read(dsi, dsi->commands + stored, dsi->cmdlen - stored);
- if (len > 0)
- stored += len;
- else {
- LOG(log_error, logtype_default, "dsi_tcp_open: stream_read: %s", strerror(errno));
- exit(EXITERR_CLNT);
- }
+
+ /* send back our pid */
+ return pid;
+}
+
+/* get it from the interface list */
+#ifndef IFF_SLAVE
+#define IFF_SLAVE 0
+#endif
+
+static void guess_interface(DSI *dsi, const char *hostname, const char *port)
+{
+ int fd;
+ char **start, **list;
+ struct ifreq ifr;
+ struct sockaddr_in *sa = (struct sockaddr_in *)&dsi->server;
+
+ start = list = getifacelist();
+ if (!start)
+ return;
+
+ fd = socket(PF_INET, SOCK_STREAM, 0);
+
+ while (list && *list) {
+ strlcpy(ifr.ifr_name, *list, sizeof(ifr.ifr_name));
+ list++;
+
+
+ if (ioctl(dsi->serversock, SIOCGIFFLAGS, &ifr) < 0)
+ continue;
+
+ if (ifr.ifr_flags & (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_SLAVE))
+ continue;
+
+ if (!(ifr.ifr_flags & (IFF_UP | IFF_RUNNING)) )
+ continue;
+
+ if (ioctl(fd, SIOCGIFADDR, &ifr) < 0)
+ continue;
+
+ memset(&dsi->server, 0, sizeof(struct sockaddr_storage));
+ sa->sin_family = AF_INET;
+ sa->sin_port = htons(atoi(port));
+ sa->sin_addr = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
+
+ LOG(log_info, logtype_dsi, "dsi_tcp: '%s:%s' on interface '%s' will be used instead.",
+ getip_string((struct sockaddr *)&dsi->server), port, ifr.ifr_name);
+ goto iflist_done;
}
-
- /* stop timer and restore signal handler */
- memset(&timer, 0, sizeof(timer));
- setitimer(ITIMER_REAL, &timer, NULL);
- sigaction(SIGALRM, &oldact, NULL);
-
- LOG(log_info, logtype_default,"ASIP session:%u(%d) from %s:%u(%d)",
- ntohs(dsi->server.sin_port), dsi->serversock,
- inet_ntoa(dsi->client.sin_addr), ntohs(dsi->client.sin_port),
- dsi->socket);
- }
-
- /* send back our pid */
- return pid;
+ LOG(log_info, logtype_dsi, "dsi_tcp (Chooser will not select afp/tcp) "
+ "Check to make sure %s is in /etc/hosts and the correct domain is in "
+ "/etc/resolv.conf: %s", hostname, strerror(errno));
+
+iflist_done:
+ close(fd);
+ freeifacelist(start);
}
+
+#ifndef AI_NUMERICSERV
+#define AI_NUMERICSERV 0
+#endif
+
/* this needs to accept passed in addresses */
-int dsi_tcp_init(DSI *dsi, const char *hostname, const char *address,
- const u_int16_t ipport, const int proxy)
+int dsi_tcp_init(DSI *dsi, const char *hostname, const char *inaddress, const char *inport)
{
- struct servent *service;
- struct hostent *host;
- int port;
-
- dsi->protocol = DSI_TCPIP;
-
- /* create a socket */
- if (proxy)
- dsi->serversock = -1;
- else if ((dsi->serversock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
- return 0;
-
- /* find port */
- if (ipport)
- port = htons(ipport);
- else if ((service = getservbyname("afpovertcp", "tcp")))
- port = service->s_port;
- else
- port = htons(DSI_AFPOVERTCP_PORT);
-
- /* find address */
- if (!address)
- dsi->server.sin_addr.s_addr = htonl(INADDR_ANY);
- else if (inet_aton(address, &dsi->server.sin_addr) == 0) {
- LOG(log_info, logtype_default, "dsi_tcp: invalid address (%s)", address);
- return 0;
- }
-
- dsi->server.sin_family = AF_INET;
- dsi->server.sin_port = port;
-
- if (!proxy) {
- /* this deals w/ quick close/opens */
-#ifdef SO_REUSEADDR
- port = 1;
- setsockopt(dsi->serversock, SOL_SOCKET, SO_REUSEADDR, &port, sizeof(port));
+ EC_INIT;
+ int flag;
+ char *a = NULL, *b;
+ const char *address;
+ const char *port;
+ struct addrinfo hints, *servinfo, *p;
+
+ /* Check whether address is of the from IP:PORT and split */
+ address = inaddress;
+ port = inport;
+ if (address && strchr(address, ':')) {
+ EC_NULL_LOG( address = a = strdup(address) );
+ b = strchr(a, ':');
+ *b = 0;
+ port = b + 1;
+ }
+
+ /* Prepare hint for getaddrinfo */
+ memset(&hints, 0, sizeof hints);
+#if !defined(FREEBSD)
+ hints.ai_family = AF_UNSPEC;
#endif
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_NUMERICSERV;
-#ifdef USE_TCP_NODELAY
+ if ( ! address) {
+ hints.ai_flags |= AI_PASSIVE;
+#if defined(FREEBSD)
+ hints.ai_family = AF_INET6;
+#endif
+ } else {
+ hints.ai_flags |= AI_NUMERICHOST;
+#if defined(FREEBSD)
+ hints.ai_family = AF_UNSPEC;
+#endif
+ }
+ if ((ret = getaddrinfo(address ? address : NULL, port, &hints, &servinfo)) != 0) {
+ LOG(log_error, logtype_dsi, "dsi_tcp_init: getaddrinfo: %s\n", gai_strerror(ret));
+ EC_FAIL;
+ }
+
+ /* loop through all the results and bind to the first we can */
+ for (p = servinfo; p != NULL; p = p->ai_next) {
+ if ((dsi->serversock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
+ LOG(log_info, logtype_dsi, "dsi_tcp_init: socket: %s", strerror(errno));
+ continue;
+ }
+
+ /*
+ * Set some socket options:
+ * SO_REUSEADDR deals w/ quick close/opens
+ * TCP_NODELAY diables Nagle
+ */
+#ifdef SO_REUSEADDR
+ flag = 1;
+ setsockopt(dsi->serversock, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof(flag));
+#endif
+#if defined(FREEBSD) && defined(IPV6_BINDV6ONLY)
+ int on = 0;
+ setsockopt(dsi->serversock, IPPROTO_IPV6, IPV6_BINDV6ONLY, (char *)&on, sizeof (on));
+#endif
+#ifdef USE_TCP_NODELAY
#ifndef SOL_TCP
#define SOL_TCP IPPROTO_TCP
-#endif
-
- port = 1;
- setsockopt(dsi->serversock, SOL_TCP, TCP_NODELAY, &port, sizeof(port));
+#endif
+ flag = 1;
+ setsockopt(dsi->serversock, SOL_TCP, TCP_NODELAY, &flag, sizeof(flag));
#endif /* USE_TCP_NODELAY */
+
+ if (bind(dsi->serversock, p->ai_addr, p->ai_addrlen) == -1) {
+ close(dsi->serversock);
+ LOG(log_info, logtype_dsi, "dsi_tcp_init: bind: %s\n", strerror(errno));
+ continue;
+ }
+
+ if (listen(dsi->serversock, DSI_TCPMAXPEND) < 0) {
+ close(dsi->serversock);
+ LOG(log_info, logtype_dsi, "dsi_tcp_init: listen: %s\n", strerror(errno));
+ continue;
+ }
+
+ break;
+ }
- /* now, bind the socket and set it up for listening */
- if ((bind(dsi->serversock, (struct sockaddr *) &dsi->server,
- sizeof(dsi->server)) < 0) ||
- (listen(dsi->serversock, DSI_TCPMAXPEND) < 0)) {
- close(dsi->serversock);
- return 0;
+ if (p == NULL) {
+ LOG(log_error, logtype_dsi, "dsi_tcp_init: no suitable network config for TCP socket");
+ freeaddrinfo(servinfo);
+ EC_FAIL;
}
- }
-
- /* Point protocol specific functions to tcp versions */
- dsi->proto_open = dsi_tcp_open;
- dsi->proto_close = dsi_tcp_close;
-
- /* get real address for GetStatus. we'll go through the list of
- * interfaces if necessary. */
-
- if (address) {
- /* address is a parameter, use it 'as is' */
- return 1;
- }
-
- if (!(host = gethostbyname(hostname)) ) { /* we can't resolve the name */
-
- LOG(log_info, logtype_default, "dsi_tcp: cannot resolve hostname '%s'", hostname);
- if (proxy) {
- /* give up we have nothing to advertise */
- return 0;
- }
- }
- else {
- if (((struct in_addr *) host->h_addr)->s_addr != 0x100007F) { /* FIXME ugly check */
- dsi->server.sin_addr.s_addr = ((struct in_addr *) host->h_addr)->s_addr;
- return 1;
- }
- LOG(log_info, logtype_default, "dsi_tcp: hostname '%s' resolves to loopback address", hostname);
- }
- {
- char **start, **list;
- struct ifreq ifr;
-
- /* get it from the interface list */
- start = list = getifacelist();
- while (list && *list) {
- strlcpy(ifr.ifr_name, *list, sizeof(ifr.ifr_name));
- list++;
-#ifndef IFF_SLAVE
-#define IFF_SLAVE 0
-#endif
+ /* Copy struct sockaddr to struct sockaddr_storage */
+ memcpy(&dsi->server, p->ai_addr, p->ai_addrlen);
+ freeaddrinfo(servinfo);
- if (ioctl(dsi->serversock, SIOCGIFFLAGS, &ifr) < 0)
- continue;
+ /* Point protocol specific functions to tcp versions */
+ dsi->proto_open = dsi_tcp_open;
+ dsi->proto_close = dsi_tcp_close;
- if (ifr.ifr_flags & (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_SLAVE))
- continue;
+ /* get real address for GetStatus. */
- if (!(ifr.ifr_flags & (IFF_UP | IFF_RUNNING)) )
- continue;
+ if (address) {
+ /* address is a parameter, use it 'as is' */
+ goto EC_CLEANUP;
+ }
- if (ioctl(dsi->serversock, SIOCGIFADDR, &ifr) < 0)
- continue;
-
- dsi->server.sin_addr.s_addr =
- ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr;
- LOG(log_info, logtype_default, "dsi_tcp: '%s' on interface '%s' will be used instead.",
- inet_ntoa(dsi->server.sin_addr), ifr.ifr_name);
- goto iflist_done;
- }
- LOG(log_info, logtype_default, "dsi_tcp (Chooser will not select afp/tcp) \
-Check to make sure %s is in /etc/hosts and the correct domain is in \
-/etc/resolv.conf: %s", hostname, strerror(errno));
+ /* Prepare hint for getaddrinfo */
+ memset(&hints, 0, sizeof hints);
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
-iflist_done:
- if (start)
- freeifacelist(start);
- }
+ if ((ret = getaddrinfo(hostname, port, &hints, &servinfo)) != 0) {
+ LOG(log_info, logtype_dsi, "dsi_tcp_init: getaddrinfo '%s': %s\n", hostname, gai_strerror(ret));
+ goto interfaces;
+ }
+
+ for (p = servinfo; p != NULL; p = p->ai_next) {
+ if (p->ai_family == AF_INET) { // IPv4
+ struct sockaddr_in *ipv4 = (struct sockaddr_in *)p->ai_addr;
+ if ( (ipv4->sin_addr.s_addr & htonl(0x7f000000)) != htonl(0x7f000000) )
+ break;
+ } else { // IPv6
+ struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)p->ai_addr;
+ unsigned char ipv6loopb[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
+ if ((memcmp(ipv6->sin6_addr.s6_addr, ipv6loopb, 16)) != 0)
+ break;
+ }
+ }
+
+ if (p) {
+ /* Store found address in dsi->server */
+ memcpy(&dsi->server, p->ai_addr, p->ai_addrlen);
+ freeaddrinfo(servinfo);
+ goto EC_CLEANUP;
+ }
+ LOG(log_info, logtype_dsi, "dsi_tcp: hostname '%s' resolves to loopback address", hostname);
+ freeaddrinfo(servinfo);
- return 1;
+interfaces:
+ guess_interface(dsi, hostname, port ? port : "548");
+EC_CLEANUP:
+ if (a)
+ free(a);
+ EC_EXIT;
}
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