This adds Service Location Protocol support. To use this patch, run these commands for a successful build: patch -p1 diff --git a/loadparm.c b/loadparm.c --- a/loadparm.c +++ b/loadparm.c @@ -98,6 +98,9 @@ typedef struct { char *socket_options; int rsync_port; +#ifdef HAVE_LIBSLP + int slp_refresh; +#endif } global_vars; /* This structure describes a single section. Their order must match the @@ -312,6 +315,9 @@ static struct parm_struct parm_table[] = {"motd file", P_STRING, P_GLOBAL,&Vars.g.motd_file, NULL,0}, {"pid file", P_STRING, P_GLOBAL,&Vars.g.pid_file, NULL,0}, {"port", P_INTEGER,P_GLOBAL,&Vars.g.rsync_port, NULL,0}, +#ifdef HAVE_LIBSLP + {"slp refresh", P_INTEGER,P_GLOBAL,&Vars.g.slp_refresh, NULL,0}, +#endif {"socket options", P_STRING, P_GLOBAL,&Vars.g.socket_options, NULL,0}, {"auth users", P_STRING, P_LOCAL, &Vars.l.auth_users, NULL,0}, @@ -443,6 +449,9 @@ FN_GLOBAL_STRING(lp_pid_file, &Vars.g.pid_file) FN_GLOBAL_STRING(lp_socket_options, &Vars.g.socket_options) FN_GLOBAL_INTEGER(lp_rsync_port, &Vars.g.rsync_port) +#ifdef HAVE_LIBSLP +FN_GLOBAL_INTEGER(lp_slp_refresh, &Vars.g.slp_refresh) +#endif FN_LOCAL_STRING(lp_auth_users, auth_users) FN_LOCAL_STRING(lp_charset, charset) diff --git a/main.c b/main.c --- a/main.c +++ b/main.c @@ -1238,6 +1238,18 @@ static int start_client(int argc, char *argv[]) if (!read_batch) { /* for read_batch, NO source is specified */ char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port); + + if (shell_machine && !shell_machine[0]) { +#ifdef HAVE_LIBSLP + /* User entered just rsync:// URI */ + print_service_list(); + exit_cleanup(0); +#else /* No SLP, die here */ + rprintf(FINFO, "No SLP support, cannot browse\n"); + exit_cleanup(RERR_SYNTAX); +#endif + } + if (path) { /* source is remote */ char *dummy_host; int dummy_port = 0; diff --git a/options.c b/options.c --- a/options.c +++ b/options.c @@ -567,6 +567,7 @@ static void print_rsync_version(enum logcode f) char const *links = "no "; char const *iconv = "no "; char const *ipv6 = "no "; + char const *slp = "no "; STRUCT_STAT *dumstat; #if SUBPROTOCOL_VERSION != 0 @@ -600,6 +601,9 @@ static void print_rsync_version(enum logcode f) #ifdef CAN_SET_SYMLINK_TIMES symtimes = ""; #endif +#if HAVE_LIBSLP + slp = ""; +#endif rprintf(f, "%s version %s protocol version %d%s\n", RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol); @@ -613,8 +617,8 @@ static void print_rsync_version(enum logcode f) (int)(sizeof (int64) * 8)); rprintf(f, " %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n", got_socketpair, hardlinks, links, ipv6, have_inplace); - rprintf(f, " %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes\n", - have_inplace, acls, xattrs, iconv, symtimes); + rprintf(f, " %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sSLP\n", + have_inplace, acls, xattrs, iconv, symtimes, slp); #ifdef MAINTAINER_MODE rprintf(f, "Panic Action: \"%s\"\n", get_panic_action()); diff --git a/rsync.h b/rsync.h --- a/rsync.h +++ b/rsync.h @@ -199,6 +199,10 @@ #define SIGNIFICANT_ITEM_FLAGS (~(\ ITEM_BASIS_TYPE_FOLLOWS | ITEM_XNAME_FOLLOWS | ITEM_LOCAL_CHANGE)) +/* this is the minimum we'll use, irrespective of config setting */ +/* definately don't set to less than about 30 seconds */ +#define SLP_MIN_TIMEOUT 120 + #define CFN_KEEP_DOT_DIRS (1<<0) #define CFN_KEEP_TRAILING_SLASH (1<<1) #define CFN_DROP_TRAILING_DOT_DIR (1<<2) diff --git a/rsync.yo b/rsync.yo --- a/rsync.yo +++ b/rsync.yo @@ -148,7 +148,12 @@ particular rsync daemon by leaving off the module name: quote(tt(rsync somehost.mydomain.com::)) -See the following section for more details. +And, if Service Location Protocol is available, the following will list the +available rsync servers: + +quote(tt(rsync rsync://)) + +See the following section for even more usage details. manpagesection(ADVANCED USAGE) diff --git a/rsyncd.conf b/rsyncd.conf new file mode 100644 --- /dev/null +++ b/rsyncd.conf @@ -0,0 +1,3 @@ + +slp refresh = 300 + diff --git a/rsyncd.conf.yo b/rsyncd.conf.yo --- a/rsyncd.conf.yo +++ b/rsyncd.conf.yo @@ -120,6 +120,15 @@ details on some of the options you may be able to set. By default no special socket options are set. These settings can also be specified via the bf(--sockopts) command-line option. +dit(bf(slp refresh)) This parameter is used to determine how long service +advertisements are valid (measured in seconds), and is only applicable if +you have Service Location Protocol support compiled in. If this is +not set or is set to zero, then service advertisements never time out. If +this is set to less than 120 seconds, then 120 seconds is used. If it is +set to more than 65535, then 65535 is used (which is a limitation of SLP). +Using 3600 (one hour) is a good number if you tend to change your +configuration. + enddit() manpagesection(MODULE PARAMETERS) @@ -766,6 +775,7 @@ use chroot = yes max connections = 4 syslog facility = local5 pid file = /var/run/rsyncd.pid +slp refresh = 3600 [ftp] path = /var/ftp/./pub diff --git a/socket.c b/socket.c --- a/socket.c +++ b/socket.c @@ -530,6 +530,16 @@ void start_accept_loop(int port, int (*fn)(int, int)) { fd_set deffds; int *sp, maxfd, i; +#ifdef HAVE_LIBSLP + time_t next_slp_refresh; + short slp_timeout = lp_slp_refresh(); + if (slp_timeout) { + if (slp_timeout < SLP_MIN_TIMEOUT) + slp_timeout = SLP_MIN_TIMEOUT; + /* re-register before slp times out */ + slp_timeout -= 15; + } +#endif #ifdef HAVE_SIGACTION sigact.sa_flags = SA_NOCLDSTOP; @@ -558,14 +568,25 @@ void start_accept_loop(int port, int (*fn)(int, int)) maxfd = sp[i]; } +#ifdef HAVE_LIBSLP + next_slp_refresh = time(NULL) + slp_timeout; +#endif + /* now accept incoming connections - forking a new process * for each incoming connection */ while (1) { fd_set fds; pid_t pid; int fd; + int sel_ret; struct sockaddr_storage addr; socklen_t addrlen = sizeof addr; +#ifdef HAVE_LIBSLP + struct timeval slp_tv; + + slp_tv.tv_sec = 10; + slp_tv.tv_usec = 0; +#endif /* close log file before the potentially very long select so * file can be trimmed by another process instead of growing @@ -578,7 +599,18 @@ void start_accept_loop(int port, int (*fn)(int, int)) fds = deffds; #endif - if (select(maxfd + 1, &fds, NULL, NULL, NULL) < 1) +#ifdef HAVE_LIBSLP + sel_ret = select(maxfd + 1, &fds, NULL, NULL, + slp_timeout ? &slp_tv : NULL); + if (sel_ret == 0 && slp_timeout && time(NULL) > next_slp_refresh) { + rprintf(FINFO, "Service registration expired, refreshing it\n"); + register_services(); + next_slp_refresh = time(NULL) + slp_timeout; + } +#else + sel_ret = select(maxfd + 1, &fds, NULL, NULL, NULL); +#endif + if (sel_ret < 1) continue; for (i = 0, fd = -1; sp[i] >= 0; i++) { diff --git a/srvloc.c b/srvloc.c new file mode 100644 --- /dev/null +++ b/srvloc.c @@ -0,0 +1,103 @@ +/* -*- c-file-style: "linux"; -*- + + Copyright (C) 2002 by Brad Hards + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* This file implements the service location functionality */ +/* Basically, it uses normal Service Location Protocol API */ + +/* It is really a cheap hack - just to show how it might work + in a real application. +*/ + +#include "rsync.h" + +#include +#include +#include + +/* This one just prints out the attributes */ +static SLPBoolean getAttrCallback(UNUSED(SLPHandle hslp), const char *attrlist, + SLPError errcode, UNUSED(void *cookie)) +{ + char *cleanstr; + + if (errcode == SLP_OK) { + if (!strcmp(attrlist, "(comment=)")) + rprintf(FINFO, "\t(No description)\n"); + else { + cleanstr = strrchr(attrlist, ')') ; + *cleanstr = ' '; /* remove last ')' */ + rprintf(FINFO, "\t%s\n", strchr(attrlist, '=') + 1); + } + } + return SLP_FALSE; +} + +static SLPBoolean getSLPSrvURLCallback(UNUSED(SLPHandle hslp), + const char *srvurl, UNUSED(unsigned short lifetime), + SLPError errcode, void *cookie) +{ + SLPError result; + SLPHandle attrhslp; + + if (errcode == SLP_OK) { + /* chop service: off the front */ + rprintf(FINFO, " %s ", (strchr(srvurl, ':') + 1)); + /* check for any attributes */ + if (SLPOpen("en", SLP_FALSE,&attrhslp) == SLP_OK) { + result = SLPFindAttrs(attrhslp, srvurl, + "", /* return all attributes */ + "", /* use configured scopes */ + getAttrCallback, NULL); + if (result != SLP_OK) { + rprintf(FERROR, "errorcode: %i\n",result); + } + SLPClose(attrhslp); + } + *(SLPError*)cookie = SLP_OK; + } else + *(SLPError*)cookie = errcode; + + /* Return SLP_TRUE because we want to be called again + * if more services were found. */ + + return SLP_TRUE; +} + +int print_service_list(void) +{ + SLPError err; + SLPError callbackerr; + SLPHandle hslp; + + err = SLPOpen("en",SLP_FALSE,&hslp); + if (err != SLP_OK) { + rprintf(FERROR, "Error opening slp handle %i\n", err); + return err; + } + + SLPFindSrvs(hslp, "rsync", + 0, /* use configured scopes */ + 0, /* no attr filter */ + getSLPSrvURLCallback, &callbackerr); + + /* Now that we're done using slp, close the slp handle */ + SLPClose(hslp); + + return 0; +} diff --git a/srvreg.c b/srvreg.c new file mode 100644 --- /dev/null +++ b/srvreg.c @@ -0,0 +1,128 @@ +/* -*- c-file-style: "linux"; -*- + + Copyright (C) 2002 by Brad Hards + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* This file implements the service registration functionality */ + +/* Basically, it uses normal Service Location Protocol API */ + +#include "rsync.h" +#include "slp.h" +#include "netdb.h" + +extern int rsync_port; + +static void slp_callback(UNUSED(SLPHandle hslp), SLPError errcode, void *cookie) +{ + /* return the error code in the cookie */ + *(SLPError*)cookie = errcode; + + /* You could do something else here like print out + * the errcode, etc. Remember, as a general rule, + * do not try to do too much in a callback because + * it is being executed by the same thread that is + * reading slp packets from the wire. */ +} + +int register_services(void) +{ + SLPError err, callbackerr; + SLPHandle hslp; + int n; + int i; + char srv[120]; + char attr[120]; + char localhost[256]; + extern char *config_file; + short timeout; + struct addrinfo aih, *ai = 0; + + if (!lp_load(config_file, 0)) { + exit_cleanup(RERR_SYNTAX); + } + + n = lp_numservices(); + + if (0 == lp_slp_refresh()) + timeout = SLP_LIFETIME_MAXIMUM; /* don't expire, ever */ + else if (SLP_MIN_TIMEOUT > lp_slp_refresh()) + timeout = SLP_MIN_TIMEOUT; /* use a reasonable minimum */ + else if (SLP_LIFETIME_MAXIMUM <= lp_slp_refresh()) + timeout = (SLP_LIFETIME_MAXIMUM - 1); /* as long as possible */ + else + timeout = lp_slp_refresh(); + + rprintf(FINFO, "rsyncd registering %d service%s with slpd for %d seconds:\n", n, ((n==1)? "":"s"), timeout); + err = SLPOpen("en",SLP_FALSE,&hslp); + if (err != SLP_OK) { + rprintf(FINFO, "Error opening slp handle %i\n",err); + return err; + } + if (gethostname(localhost, sizeof localhost)) { + rprintf(FINFO, "Could not get hostname: %s\n", strerror(errno)); + return err; + } + memset(&aih, 0, sizeof aih); + aih.ai_family = PF_UNSPEC; + aih.ai_flags = AI_CANONNAME; + if (0 != (err = getaddrinfo(localhost, 0, &aih, &ai)) || !ai) { + rprintf(FINFO, "Could not resolve hostname: %s\n", gai_strerror(err)); + return err; + } + /* Register each service with SLP */ + for (i = 0; i < n; i++) { + if (!lp_list(i)) + continue; + + snprintf(srv, sizeof srv, "service:rsync://%s:%d/%s", + ai->ai_canonname, + rsync_port, + lp_name(i)); + rprintf(FINFO, " %s\n", srv); + if (lp_comment(i)) { + snprintf(attr, sizeof attr, "(comment=%s)", + lp_comment(i)); + } + err = SLPReg(hslp, + srv, /* service to register */ + timeout, + 0, /* this is ignored */ + attr, /* attributes */ + SLP_TRUE, /* new registration - don't change this */ + slp_callback, /* callback */ + &callbackerr); + + /* err may contain an error code that occurred as the slp library + * _prepared_ to make the call. */ + if (err != SLP_OK || callbackerr != SLP_OK) + rprintf(FINFO, "Error registering service with slp %i\n", err); + + /* callbackerr may contain an error code (that was assigned through + * the callback cookie) that occurred as slp packets were sent on + * the wire. */ + if (callbackerr != SLP_OK) + rprintf(FINFO, "Error registering service with slp %i\n",callbackerr); + } + + /* Now that we're done using slp, close the slp handle */ + freeaddrinfo(ai); + SLPClose(hslp); + + /* refresh is done in main select loop */ + return 0; +}