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Add -h option to rpcbind, used to specify what address to bind to for
UDP requests. Submitted by: mbr
This commit is contained in:
Alfred Perlstein
parent
58d646cdd3
commit
9fb9141723
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=99774
@ -72,6 +72,29 @@ will not fork when it starts, will print additional information
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during operation, and will abort on certain errors.
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With this option, the name-to-address translation consistency
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checks are shown in detail.
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.It Fl h
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Specify specific IP addresses to bind to for UDP requests.
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This option
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may be specified multiple times and is typically necessary when running
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on a multi-homed host.
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If no
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.Fl h
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option is specified,
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.Nm
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will bind to
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.Dv INADDR_ANY ,
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which could lead to problems on a multi-homed host due to
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.Nm
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returning a UDP packet from a different IP address than it was
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sent to.
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Note that when specifying IP addresses with
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.Fl h ,
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.Nm
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will automatically add
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.Li 127.0.0.1
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and if IPv6 is enabled,
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.Li ::1
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to the list.
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.It Fl i
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.Dq Insecure
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mode.
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@ -86,6 +86,10 @@ int insecure = 0;
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int oldstyle_local = 0;
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int verboselog = 0;
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char **hosts = NULL;
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int nhosts = 0;
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int on = 1;
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#ifdef WARMSTART
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/* Local Variable */
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static int warmstart = 0; /* Grab a old copy of registrations */
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@ -220,7 +224,10 @@ init_transport(struct netconfig *nconf)
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int status; /* bound checking ? */
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int aicode;
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int addrlen;
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int nhostsbak;
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int checkbind;
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struct sockaddr *sa;
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u_int32_t host_addr[4]; /* IPv4 or IPv6 */
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struct sockaddr_un sun;
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mode_t oldmask;
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@ -242,11 +249,14 @@ init_transport(struct netconfig *nconf)
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#endif
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/*
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* XXX - using RPC library internal functions.
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* XXX - using RPC library internal functions. For NC_TPI_CLTS
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* we call this later, for each socket we like to bind.
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*/
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if ((fd = __rpc_nconf2fd(nconf)) < 0) {
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syslog(LOG_ERR, "cannot create socket for %s", nconf->nc_netid);
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return (1);
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if (nconf->nc_semantics != NC_TPI_CLTS) {
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if ((fd = __rpc_nconf2fd(nconf)) < 0) {
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syslog(LOG_ERR, "cannot create socket for %s", nconf->nc_netid);
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return (1);
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}
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}
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if (!__rpc_nconf2sockinfo(nconf, &si)) {
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@ -271,59 +281,189 @@ init_transport(struct netconfig *nconf)
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hints.ai_family = si.si_af;
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hints.ai_socktype = si.si_socktype;
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hints.ai_protocol = si.si_proto;
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if ((aicode = getaddrinfo(NULL, servname, &hints, &res)) != 0) {
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syslog(LOG_ERR, "cannot get local address for %s: %s",
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nconf->nc_netid, gai_strerror(aicode));
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return 1;
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}
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if (nconf->nc_semantics == NC_TPI_CLTS) {
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/*
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* If no hosts were specified, just bind to INADDR_ANY. Otherwise
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* make sure 127.0.0.1 is added to the list.
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*/
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nhostsbak = nhosts;
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nhostsbak++;
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hosts = realloc(hosts, nhostsbak * sizeof(char *));
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if (nhostsbak == 1)
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hosts[0] = "*";
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else {
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if (hints.ai_family == AF_INET) {
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hosts[nhostsbak - 1] = "127.0.0.1";
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} else if (hints.ai_family == AF_INET6) {
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hosts[nhostsbak - 1] = "::1";
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} else
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return 1;
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}
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addrlen = res->ai_addrlen;
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sa = (struct sockaddr *)res->ai_addr;
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}
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oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
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if (bind(fd, sa, addrlen) < 0) {
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syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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(void) umask(oldmask);
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/* Copy the address */
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taddr.addr.len = taddr.addr.maxlen = addrlen;
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taddr.addr.buf = malloc(addrlen);
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if (taddr.addr.buf == NULL) {
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syslog(LOG_ERR, "cannot allocate memory for %s address",
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nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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memcpy(taddr.addr.buf, sa, addrlen);
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/*
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* Bind to specific IPs if asked to
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*/
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checkbind = 1;
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while (nhostsbak > 0) {
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--nhostsbak;
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/*
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* XXX - using RPC library internal functions.
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*/
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if ((fd = __rpc_nconf2fd(nconf)) < 0) {
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syslog(LOG_ERR, "cannot create socket for %s", nconf->nc_netid);
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return (1);
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}
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switch (hints.ai_family) {
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case AF_INET:
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if (inet_pton(AF_INET, hosts[nhostsbak], host_addr) == 1) {
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hints.ai_flags &= AI_NUMERICHOST;
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} else {
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/*
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* Skip if we have a AF_INET6 adress
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*/
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if (inet_pton(AF_INET6, hosts[nhostsbak],
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host_addr) == 1)
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continue;
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}
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break;
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case AF_INET6:
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if (inet_pton(AF_INET6, hosts[nhostsbak], host_addr) == 1) {
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hints.ai_flags &= AI_NUMERICHOST;
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} else {
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/*
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* Skip if we have a AF_INET adress
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*/
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if (inet_pton(AF_INET, hosts[nhostsbak],
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host_addr) == 1)
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continue;
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}
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if (setsockopt(fd, IPPROTO_IPV6,
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IPV6_BINDV6ONLY, &on, sizeof on) < 0) {
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syslog(LOG_ERR, "can't set v6-only binding for "
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"udp6 socket: %m");
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continue;
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}
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break;
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default:
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break;
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}
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/*
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* If no hosts were specified, just bind to INADDR_ANY
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*/
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if (strcmp("*", hosts[nhostsbak]) == 0)
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hosts[nhostsbak] = NULL;
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if ((aicode = getaddrinfo(hosts[nhostsbak],
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servname, &hints, &res)) != 0) {
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syslog(LOG_ERR, "cannot get local address for %s: %s",
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nconf->nc_netid, gai_strerror(aicode));
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continue;
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}
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addrlen = res->ai_addrlen;
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sa = (struct sockaddr *)res->ai_addr;
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oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
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if (bind(fd, sa, addrlen) != 0) {
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syslog(LOG_ERR, "cannot bind %s on %s: %m",
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hosts[nhostsbak], nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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continue;
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} else
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checkbind++;
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(void) umask(oldmask);
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/* Copy the address */
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taddr.addr.len = taddr.addr.maxlen = addrlen;
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taddr.addr.buf = malloc(addrlen);
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if (taddr.addr.buf == NULL) {
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syslog(LOG_ERR, "cannot allocate memory for %s address",
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nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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memcpy(taddr.addr.buf, sa, addrlen);
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#ifdef ND_DEBUG
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if (debugging) {
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/* for debugging print out our universal address */
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char *uaddr;
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struct netbuf nb;
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if (debugging) {
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/* for debugging print out our universal address */
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char *uaddr;
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struct netbuf nb;
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nb.buf = sa;
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nb.len = nb.maxlen = sa->sa_len;
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uaddr = taddr2uaddr(nconf, &nb);
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(void) fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
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(void) free(uaddr);
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}
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nb.buf = sa;
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nb.len = nb.maxlen = sa->sa_len;
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uaddr = taddr2uaddr(nconf, &nb);
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(void) fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
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(void) free(uaddr);
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}
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#endif
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if (res != NULL)
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freeaddrinfo(res);
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if (nconf->nc_semantics != NC_TPI_CLTS)
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listen(fd, SOMAXCONN);
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if (nconf->nc_semantics != NC_TPI_CLTS)
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listen(fd, SOMAXCONN);
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my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 0, 0);
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if (my_xprt == (SVCXPRT *)NULL) {
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syslog(LOG_ERR, "%s: could not create service",
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nconf->nc_netid);
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goto error;
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}
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}
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if (!checkbind)
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return 1;
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} else {
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if (strcmp(nconf->nc_netid, "unix") != 0) {
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if ((aicode = getaddrinfo(NULL, servname, &hints, &res)) != 0) {
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syslog(LOG_ERR, "cannot get local address for %s: %s",
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nconf->nc_netid, gai_strerror(aicode));
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return 1;
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}
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addrlen = res->ai_addrlen;
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sa = (struct sockaddr *)res->ai_addr;
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}
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oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
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if (bind(fd, sa, addrlen) < 0) {
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syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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(void) umask(oldmask);
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my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 0, 0);
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if (my_xprt == (SVCXPRT *)NULL) {
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syslog(LOG_ERR, "%s: could not create service",
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nconf->nc_netid);
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goto error;
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/* Copy the address */
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taddr.addr.len = taddr.addr.maxlen = addrlen;
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taddr.addr.buf = malloc(addrlen);
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if (taddr.addr.buf == NULL) {
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syslog(LOG_ERR, "cannot allocate memory for %s address",
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nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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memcpy(taddr.addr.buf, sa, addrlen);
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#ifdef ND_DEBUG
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if (debugging) {
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/* for debugging print out our universal address */
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char *uaddr;
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struct netbuf nb;
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nb.buf = sa;
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nb.len = nb.maxlen = sa->sa_len;
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uaddr = taddr2uaddr(nconf, &nb);
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(void) fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
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(void) free(uaddr);
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}
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#endif
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if (nconf->nc_semantics != NC_TPI_CLTS)
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listen(fd, SOMAXCONN);
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my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 0, 0);
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if (my_xprt == (SVCXPRT *)NULL) {
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syslog(LOG_ERR, "%s: could not create service",
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nconf->nc_netid);
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goto error;
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}
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}
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#ifdef PORTMAP
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@ -513,7 +653,7 @@ parseargs(int argc, char *argv[])
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{
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int c;
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while ((c = getopt(argc, argv, "dwailLs")) != -1) {
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while ((c = getopt(argc, argv, "dwah:ilLs")) != -1) {
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switch (c) {
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case 'a':
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doabort = 1; /* when debugging, do an abort on */
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@ -522,6 +662,15 @@ parseargs(int argc, char *argv[])
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case 'd':
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debugging = 1;
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break;
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case 'h':
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++nhosts;
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hosts = realloc(hosts, nhosts * sizeof(char *));
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if (hosts == NULL)
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errx(1, "Out of memory");
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hosts[nhosts - 1] = strdup(optarg);
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if (hosts[nhosts - 1] == NULL)
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errx(1, "Out of memory");
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break;
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case 'i':
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insecure = 1;
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break;
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