diff --git a/server/listen.c b/server/listen.c index a8e9e6f..1a6c1d3 100644 --- a/server/listen.c +++ b/server/listen.c @@ -34,6 +34,10 @@ #include #endif +#ifdef HAVE_SYSTEMD +#include +#endif + /* we know core's module_index is 0 */ #undef APLOG_MODULE_INDEX #define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX @@ -59,9 +63,12 @@ static int ap_listenbacklog; static int ap_listencbratio; static int send_buffer_size; static int receive_buffer_size; +#ifdef HAVE_SYSTEMD +static int use_systemd = -1; +#endif /* TODO: make_sock is just begging and screaming for APR abstraction */ -static apr_status_t make_sock(apr_pool_t *p, ap_listen_rec *server) +static apr_status_t make_sock(apr_pool_t *p, ap_listen_rec *server, int do_bind_listen) { apr_socket_t *s = server->sd; int one = 1; @@ -94,20 +101,6 @@ static apr_status_t make_sock(apr_pool_t *p, ap_listen_rec *server) return stat; } -#if APR_HAVE_IPV6 - if (server->bind_addr->family == APR_INET6) { - stat = apr_socket_opt_set(s, APR_IPV6_V6ONLY, v6only_setting); - if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) { - ap_log_perror(APLOG_MARK, APLOG_CRIT, stat, p, APLOGNO(00069) - "make_sock: for address %pI, apr_socket_opt_set: " - "(IPV6_V6ONLY)", - server->bind_addr); - apr_socket_close(s); - return stat; - } - } -#endif - /* * To send data over high bandwidth-delay connections at full * speed we must force the TCP window to open wide enough to keep the @@ -169,21 +162,37 @@ static apr_status_t make_sock(apr_pool_t *p, ap_listen_rec *server) } #endif - if ((stat = apr_socket_bind(s, server->bind_addr)) != APR_SUCCESS) { - ap_log_perror(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, stat, p, APLOGNO(00072) - "make_sock: could not bind to address %pI", - server->bind_addr); - apr_socket_close(s); - return stat; - } + if (do_bind_listen) { +#if APR_HAVE_IPV6 + if (server->bind_addr->family == APR_INET6) { + stat = apr_socket_opt_set(s, APR_IPV6_V6ONLY, v6only_setting); + if (stat != APR_SUCCESS && stat != APR_ENOTIMPL) { + ap_log_perror(APLOG_MARK, APLOG_CRIT, stat, p, APLOGNO(00069) + "make_sock: for address %pI, apr_socket_opt_set: " + "(IPV6_V6ONLY)", + server->bind_addr); + apr_socket_close(s); + return stat; + } + } +#endif - if ((stat = apr_socket_listen(s, ap_listenbacklog)) != APR_SUCCESS) { - ap_log_perror(APLOG_MARK, APLOG_STARTUP|APLOG_ERR, stat, p, APLOGNO(00073) - "make_sock: unable to listen for connections " - "on address %pI", - server->bind_addr); - apr_socket_close(s); - return stat; + if ((stat = apr_socket_bind(s, server->bind_addr)) != APR_SUCCESS) { + ap_log_perror(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, stat, p, APLOGNO(00072) + "make_sock: could not bind to address %pI", + server->bind_addr); + apr_socket_close(s); + return stat; + } + + if ((stat = apr_socket_listen(s, ap_listenbacklog)) != APR_SUCCESS) { + ap_log_perror(APLOG_MARK, APLOG_STARTUP|APLOG_ERR, stat, p, APLOGNO(00073) + "make_sock: unable to listen for connections " + "on address %pI", + server->bind_addr); + apr_socket_close(s); + return stat; + } } #ifdef WIN32 @@ -315,6 +324,123 @@ static int find_listeners(ap_listen_rec **from, ap_listen_rec **to, return found; } +#ifdef HAVE_SYSTEMD + +static int find_systemd_socket(process_rec * process, apr_port_t port) { + int fdcount, fd; + int sdc = sd_listen_fds(0); + + if (sdc < 0) { + ap_log_perror(APLOG_MARK, APLOG_CRIT, sdc, process->pool, APLOGNO(02486) + "find_systemd_socket: Error parsing enviroment, sd_listen_fds returned %d", + sdc); + return -1; + } + + if (sdc == 0) { + ap_log_perror(APLOG_MARK, APLOG_CRIT, sdc, process->pool, APLOGNO(02487) + "find_systemd_socket: At least one socket must be set."); + return -1; + } + + fdcount = atoi(getenv("LISTEN_FDS")); + for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + fdcount; fd++) { + if (sd_is_socket_inet(fd, 0, 0, -1, port) > 0) { + return fd; + } + } + + return -1; +} + +static apr_status_t alloc_systemd_listener(process_rec * process, + int fd, const char *proto, + ap_listen_rec **out_rec) +{ + apr_status_t rv; + struct sockaddr sa; + socklen_t len = sizeof(struct sockaddr); + apr_os_sock_info_t si; + ap_listen_rec *rec; + *out_rec = NULL; + + memset(&si, 0, sizeof(si)); + + rv = getsockname(fd, &sa, &len); + + if (rv != 0) { + rv = apr_get_netos_error(); + ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, process->pool, APLOGNO(02489) + "getsockname on %d failed.", fd); + return rv; + } + + si.os_sock = &fd; + si.family = sa.sa_family; + si.local = &sa; + si.type = SOCK_STREAM; + si.protocol = APR_PROTO_TCP; + + rec = apr_palloc(process->pool, sizeof(ap_listen_rec)); + rec->active = 0; + rec->next = 0; + + + rv = apr_os_sock_make(&rec->sd, &si, process->pool); + if (rv != APR_SUCCESS) { + ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, process->pool, APLOGNO(02490) + "apr_os_sock_make on %d failed.", fd); + return rv; + } + + rv = apr_socket_addr_get(&rec->bind_addr, APR_LOCAL, rec->sd); + if (rv != APR_SUCCESS) { + ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, process->pool, APLOGNO(02491) + "apr_socket_addr_get on %d failed.", fd); + return rv; + } + + rec->protocol = apr_pstrdup(process->pool, proto); + + *out_rec = rec; + + return make_sock(process->pool, rec, 0); +} + +static const char *set_systemd_listener(process_rec *process, apr_port_t port, + const char *proto) +{ + ap_listen_rec *last, *new; + apr_status_t rv; + int fd = find_systemd_socket(process, port); + if (fd < 0) { + return "Systemd socket activation is used, but this port is not " + "configured in systemd"; + } + + last = ap_listeners; + while (last && last->next) { + last = last->next; + } + + rv = alloc_systemd_listener(process, fd, proto, &new); + if (rv != APR_SUCCESS) { + return "Failed to setup socket passed by systemd using socket activation"; + } + + if (last == NULL) { + ap_listeners = last = new; + } + else { + last->next = new; + last = new; + } + + return NULL; +} + +#endif /* HAVE_SYSTEMD */ + static const char *alloc_listener(process_rec *process, const char *addr, apr_port_t port, const char* proto, void *slave) @@ -495,7 +621,7 @@ static int open_listeners(apr_pool_t *pool) } } #endif - if (make_sock(pool, lr) == APR_SUCCESS) { + if (make_sock(pool, lr, 1) == APR_SUCCESS) { ++num_open; } else { @@ -607,8 +733,28 @@ AP_DECLARE(int) ap_setup_listeners(server_rec *s) } } - if (open_listeners(s->process->pool)) { - return 0; +#ifdef HAVE_SYSTEMD + if (use_systemd) { + const char *userdata_key = "ap_open_systemd_listeners"; + void *data; + /* clear the enviroment on our second run + * so that none of our future children get confused. + */ + apr_pool_userdata_get(&data, userdata_key, s->process->pool); + if (!data) { + apr_pool_userdata_set((const void *)1, userdata_key, + apr_pool_cleanup_null, s->process->pool); + } + else { + sd_listen_fds(1); + } + } + else +#endif + { + if (open_listeners(s->process->pool)) { + return 0; + } } for (lr = ap_listeners; lr; lr = lr->next) { @@ -698,7 +844,7 @@ AP_DECLARE(apr_status_t) ap_duplicate_listeners(apr_pool_t *p, server_rec *s, duplr->bind_addr); return stat; } - make_sock(p, duplr); + make_sock(p, duplr, 1); #if AP_NONBLOCK_WHEN_MULTI_LISTEN use_nonblock = (ap_listeners && ap_listeners->next); stat = apr_socket_opt_set(duplr->sd, APR_SO_NONBLOCK, use_nonblock); @@ -825,6 +971,11 @@ AP_DECLARE_NONSTD(const char *) ap_set_listener(cmd_parms *cmd, void *dummy, if (argc < 1 || argc > 2) { return "Listen requires 1 or 2 arguments."; } +#ifdef HAVE_SYSTEMD + if (use_systemd == -1) { + use_systemd = sd_listen_fds(0) > 0; + } +#endif rv = apr_parse_addr_port(&host, &scope_id, &port, argv[0], cmd->pool); if (rv != APR_SUCCESS) { @@ -856,6 +1007,12 @@ AP_DECLARE_NONSTD(const char *) ap_set_listener(cmd_parms *cmd, void *dummy, ap_str_tolower(proto); } +#ifdef HAVE_SYSTEMD + if (use_systemd) { + return set_systemd_listener(cmd->server->process, port, proto); + } +#endif + return alloc_listener(cmd->server->process, host, port, proto, NULL); }