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306 lines
8.9 KiB
306 lines
8.9 KiB
diff --git a/daemon/remote.c b/daemon/remote.c
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index a2b2204..b6990f3 100644
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--- a/daemon/remote.c
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+++ b/daemon/remote.c
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@@ -81,6 +81,11 @@
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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+#ifdef HAVE_PWD_H
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+#include <pwd.h>
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+#include <sys/stat.h>
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+#include <fcntl.h>
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+#endif
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/* just for portability */
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#ifdef SQ
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@@ -235,7 +240,8 @@ void daemon_remote_delete(struct daemon_remote* rc)
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* @return false on failure.
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*/
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static int
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-add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err)
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+add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
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+ struct config_file* cfg)
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{
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struct addrinfo hints;
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struct addrinfo* res;
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@@ -246,29 +252,74 @@ add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err)
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snprintf(port, sizeof(port), "%d", nr);
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port[sizeof(port)-1]=0;
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memset(&hints, 0, sizeof(hints));
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- hints.ai_socktype = SOCK_STREAM;
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- hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
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- if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
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-#ifdef USE_WINSOCK
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- if(!noproto_is_err && r == EAI_NONAME) {
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- /* tried to lookup the address as name */
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- return 1; /* return success, but do nothing */
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+
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+ if(ip[0] == '/') {
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+ /* This looks like UNIX socket! */
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+ fd = create_domain_accept_sock(ip);
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+/*
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+ * When unbound starts, it first creates a socket and then
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+ * drops privs, so the socket is created as root user.
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+ * This is fine, but we would like to set _unbound user group
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+ * for this socket, and permissions should be 0660 so only
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+ * root and _unbound group members can invoke unbound-control.
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+ * The username used here is the same as username that unbound
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+ * uses for its worker processes.
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+ */
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+
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+/*
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+ * Note: this code is an exact copy of code from daemon.c
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+ * Normally this should be either wrapped into a function,
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+ * or gui/gid values should be retrieved at config parsing time
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+ * and then stored in configfile structure.
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+ * This requires action from unbound developers!
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+*/
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+#ifdef HAVE_GETPWNAM
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+ struct passwd *pwd = NULL;
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+ uid_t uid;
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+ gid_t gid;
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+ /* initialize, but not to 0 (root) */
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+ memset(&uid, 112, sizeof(uid));
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+ memset(&gid, 112, sizeof(gid));
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+ log_assert(cfg);
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+
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+ if(cfg->username && cfg->username[0]) {
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+ if((pwd = getpwnam(cfg->username)) == NULL)
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+ fatal_exit("user '%s' does not exist.",
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+ cfg->username);
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+ uid = pwd->pw_uid;
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+ gid = pwd->pw_gid;
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+ endpwent();
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}
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+
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+ chown(ip, 0, gid);
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+ chmod(ip, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
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+#endif
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+ } else {
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+ hints.ai_socktype = SOCK_STREAM;
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+ hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
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+ if((r = getaddrinfo(ip, port, &hints, &res)) != 0 || !res) {
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+#ifdef USE_WINSOCK
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+ if(!noproto_is_err && r == EAI_NONAME) {
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+ /* tried to lookup the address as name */
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+ return 1; /* return success, but do nothing */
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+ }
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#endif /* USE_WINSOCK */
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- log_err("control interface %s:%s getaddrinfo: %s %s",
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- ip?ip:"default", port, gai_strerror(r),
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+ log_err("control interface %s:%s getaddrinfo: %s %s",
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+ ip?ip:"default", port, gai_strerror(r),
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#ifdef EAI_SYSTEM
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r==EAI_SYSTEM?(char*)strerror(errno):""
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#else
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""
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#endif
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);
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- return 0;
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+ return 0;
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+ }
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+
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+ /* open fd */
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+ fd = create_tcp_accept_sock(res, 1, &noproto);
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+ freeaddrinfo(res);
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}
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- /* open fd */
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- fd = create_tcp_accept_sock(res, 1, &noproto);
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- freeaddrinfo(res);
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if(fd == -1 && noproto) {
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if(!noproto_is_err)
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return 1; /* return success, but do nothing */
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@@ -305,7 +356,7 @@ struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
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if(cfg->control_ifs) {
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struct config_strlist* p;
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for(p = cfg->control_ifs; p; p = p->next) {
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- if(!add_open(p->str, cfg->control_port, &l, 1)) {
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+ if(!add_open(p->str, cfg->control_port, &l, 1, cfg)) {
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listening_ports_free(l);
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return NULL;
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}
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@@ -313,12 +364,12 @@ struct listen_port* daemon_remote_open_ports(struct config_file* cfg)
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} else {
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/* defaults */
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if(cfg->do_ip6 &&
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- !add_open("::1", cfg->control_port, &l, 0)) {
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+ !add_open("::1", cfg->control_port, &l, 0, cfg)) {
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listening_ports_free(l);
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return NULL;
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}
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if(cfg->do_ip4 &&
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- !add_open("127.0.0.1", cfg->control_port, &l, 1)) {
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+ !add_open("127.0.0.1", cfg->control_port, &l, 1, cfg)) {
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listening_ports_free(l);
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return NULL;
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}
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diff --git a/services/listen_dnsport.c b/services/listen_dnsport.c
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index ea7ec3a..4cb04e2 100644
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--- a/services/listen_dnsport.c
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+++ b/services/listen_dnsport.c
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@@ -55,6 +55,10 @@
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#endif
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#include <fcntl.h>
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+#ifndef USE_WINSOCK
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+#include <sys/un.h>
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+#endif
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+
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/** number of queued TCP connections for listen() */
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#define TCP_BACKLOG 5
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@@ -376,6 +380,53 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
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}
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int
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+create_domain_accept_sock(char *path) {
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+ int s;
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+ struct sockaddr_un unixaddr;
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+
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+#ifndef USE_WINSOCK
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+ unixaddr.sun_len = sizeof(unixaddr);
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+ unixaddr.sun_family = AF_UNIX;
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+ strlcpy(unixaddr.sun_path, path, 104);
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+
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+ if((s = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
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+ log_err("Cannot create UNIX socket %s (%s)",
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+ path, strerror(errno));
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+ return -1;
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+ }
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+
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+ if(unlink(path) && errno != ENOENT) {
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+ /* The socket already exists and cannot be removed */
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+ log_err("Cannot remove old UNIX socket %s (%s)",
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+ path, strerror(errno));
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+ return -1;
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+ }
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+
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+ if(bind(s, (struct sockaddr *) &unixaddr,
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+ sizeof(struct sockaddr_un)) == -1) {
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+ log_err("Cannot bind UNIX socket %s (%s)",
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+ path, strerror(errno));
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+ return -1;
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+ }
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+
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+ if(!fd_set_nonblock(s)) {
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+ log_err("Cannot set non-blocking mode");
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+ return -1;
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+ }
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+
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+ if(listen(s, TCP_BACKLOG) == -1) {
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+ log_err("can't listen: %s", strerror(errno));
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+ return -1;
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+ }
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+
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+ return s;
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+#else
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+ log_err("UNIX sockets are not supported");
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+ return -1;
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+#endif
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+}
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+
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+int
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create_tcp_accept_sock(struct addrinfo *addr, int v6only, int* noproto)
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{
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int s;
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diff --git a/smallapp/unbound-control.c b/smallapp/unbound-control.c
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index a872f92..10631fd 100644
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--- a/smallapp/unbound-control.c
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+++ b/smallapp/unbound-control.c
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@@ -59,6 +59,8 @@
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#include "util/locks.h"
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#include "util/net_help.h"
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+#include <sys/un.h>
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+
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/** Give unbound-control usage, and exit (1). */
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static void
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usage()
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@@ -158,6 +160,7 @@ contact_server(const char* svr, struct config_file* cfg, int statuscmd)
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{
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struct sockaddr_storage addr;
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socklen_t addrlen;
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+ int addrfamily = 0;
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int fd;
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/* use svr or the first config entry */
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if(!svr) {
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@@ -176,12 +179,21 @@ contact_server(const char* svr, struct config_file* cfg, int statuscmd)
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if(strchr(svr, '@')) {
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if(!extstrtoaddr(svr, &addr, &addrlen))
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fatal_exit("could not parse IP@port: %s", svr);
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+ } else if(svr[0] == '/') {
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+ struct sockaddr_un* unixsock = (struct sockaddr_un *) &addr;
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+ unixsock->sun_family = AF_UNIX;
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+ unixsock->sun_len = sizeof(unixsock);
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+ strlcpy(unixsock->sun_path, svr, 104);
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+ addrlen = sizeof(struct sockaddr_un);
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+ addrfamily = AF_UNIX;
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} else {
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if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen))
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fatal_exit("could not parse IP: %s", svr);
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}
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- fd = socket(addr_is_ip6(&addr, addrlen)?AF_INET6:AF_INET,
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- SOCK_STREAM, 0);
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+
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+ if(addrfamily != AF_UNIX)
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+ addrfamily = addr_is_ip6(&addr, addrlen)?AF_INET6:AF_INET;
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+ fd = socket(addrfamily, SOCK_STREAM, 0);
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if(fd == -1) {
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#ifndef USE_WINSOCK
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fatal_exit("socket: %s", strerror(errno));
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diff --git a/util/net_help.c b/util/net_help.c
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index b3136a3..5b5b4a3 100644
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--- a/util/net_help.c
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+++ b/util/net_help.c
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@@ -45,6 +45,7 @@
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#include "util/module.h"
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#include "util/regional.h"
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#include <fcntl.h>
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+#include <sys/un.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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@@ -135,7 +136,7 @@ log_addr(enum verbosity_value v, const char* str,
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{
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uint16_t port;
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const char* family = "unknown";
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- char dest[100];
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+ char dest[108];
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int af = (int)((struct sockaddr_in*)addr)->sin_family;
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void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr;
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if(verbosity < v)
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@@ -148,15 +149,23 @@ log_addr(enum verbosity_value v, const char* str,
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case AF_UNIX: family="unix"; break;
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default: break;
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}
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- if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) {
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- strncpy(dest, "(inet_ntop error)", sizeof(dest));
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+
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+ if(af != AF_UNIX) {
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+ if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) {
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+ strncpy(dest, "(inet_ntop error)", sizeof(dest));
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+ }
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+ dest[sizeof(dest)-1] = 0;
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+ port = ntohs(((struct sockaddr_in*)addr)->sin_port);
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+ if(verbosity >= 4)
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+ verbose(v, "%s %s %s port %d (len %d)", str, family,
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+ dest, (int)port, (int)addrlen);
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+ else verbose(v, "%s %s port %d", str, dest, (int)port);
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+ } else {
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+ struct sockaddr_un* unixsock;
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+ unixsock = (struct sockaddr_un *) addr;
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+ strlcpy(dest, unixsock->sun_path, sizeof(dest));
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+ verbose(v, "%s %s %s", str, family, dest);
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}
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- dest[sizeof(dest)-1] = 0;
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- port = ntohs(((struct sockaddr_in*)addr)->sin_port);
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- if(verbosity >= 4)
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- verbose(v, "%s %s %s port %d (len %d)", str, family, dest,
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- (int)port, (int)addrlen);
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- else verbose(v, "%s %s port %d", str, dest, (int)port);
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}
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int
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