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httpd/SOURCES/httpd-2.4.43-socket-activat...

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diff --git a/server/listen.c b/server/listen.c
index 5242c2a..e2e028a 100644
--- a/server/listen.c
+++ b/server/listen.c
@@ -34,6 +34,10 @@
#include <unistd.h>
#endif
+#ifdef HAVE_SYSTEMD
+#include <systemd/sd-daemon.h>
+#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);
}