diff options
Diffstat (limited to 'debian/patches/systemd-socket-activation.patch')
| -rw-r--r-- | debian/patches/systemd-socket-activation.patch | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/debian/patches/systemd-socket-activation.patch b/debian/patches/systemd-socket-activation.patch new file mode 100644 index 0000000..5441622 --- /dev/null +++ b/debian/patches/systemd-socket-activation.patch @@ -0,0 +1,138 @@ +From 4cedd1c9acac0fba598db2eaf43278dfe8e53ef0 Mon Sep 17 00:00:00 2001 +From: Steve Langasek <steve.langasek@ubuntu.com> +Date: Thu, 1 Sep 2022 16:03:37 +0100 +Subject: Support systemd socket activation + +Unlike inetd socket activation, with systemd socket activation the +supervisor passes the listened-on socket to the child process and lets +the child process handle the accept(). This lets us do delayed start +of the sshd daemon without becoming incompatible with config options +like ClientAliveCountMax. + +Last-Update: 2022-09-01 + +Patch-Name: systemd-socket-activation.patch +--- + sshd.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++--------- + 1 file changed, 75 insertions(+), 14 deletions(-) + +diff --git a/sshd.c b/sshd.c +index 0a4eefe01..fc22fcb62 100644 +--- a/sshd.c ++++ b/sshd.c +@@ -141,10 +141,16 @@ int deny_severity; + #endif /* LIBWRAP */ + + /* Re-exec fds */ +-#define REEXEC_DEVCRYPTO_RESERVED_FD (STDERR_FILENO + 1) +-#define REEXEC_STARTUP_PIPE_FD (STDERR_FILENO + 2) +-#define REEXEC_CONFIG_PASS_FD (STDERR_FILENO + 3) +-#define REEXEC_MIN_FREE_FD (STDERR_FILENO + 4) ++#ifdef HAVE_SYSTEMD ++#define SYSTEMD_OFFSET sd_listen_fds(0) ++#else ++#define SYSTEMD_OFFSET 0 ++#endif ++ ++#define REEXEC_DEVCRYPTO_RESERVED_FD (STDERR_FILENO + 1 + SYSTEMD_OFFSET) ++#define REEXEC_STARTUP_PIPE_FD (STDERR_FILENO + 2 + SYSTEMD_OFFSET) ++#define REEXEC_CONFIG_PASS_FD (STDERR_FILENO + 3 + SYSTEMD_OFFSET) ++#define REEXEC_MIN_FREE_FD (STDERR_FILENO + 4 + SYSTEMD_OFFSET) + + extern char *__progname; + +@@ -1025,6 +1031,48 @@ server_accept_inetd(int *sock_in, int *sock_out) + debug("inetd sockets after dupping: %d, %d", *sock_in, *sock_out); + } + ++#ifdef HAVE_SYSTEMD ++/* ++ * Configure our socket fds that were passed from systemd ++ */ ++static void ++setup_systemd_socket(int listen_sock) ++{ ++ int ret; ++ struct sockaddr_storage addr; ++ socklen_t len = sizeof(addr); ++ char ntop[NI_MAXHOST], strport[NI_MAXSERV]; ++ ++ if (getsockname(listen_sock, (struct sockaddr *)&addr, &len) != 0) ++ return; ++ ++ if (((struct sockaddr *)&addr)->sa_family != AF_INET ++ && ((struct sockaddr *)&addr)->sa_family != AF_INET6) ++ return; ++ if (num_listen_socks >= MAX_LISTEN_SOCKS) ++ fatal("Too many listen sockets. " ++ "Enlarge MAX_LISTEN_SOCKS"); ++ if ((ret = getnameinfo((struct sockaddr *)&addr, len, ntop, ++ sizeof(ntop), strport, sizeof(strport), ++ NI_NUMERICHOST|NI_NUMERICSERV)) != 0) { ++ error("getnameinfo failed: %.100s", ++ ssh_gai_strerror(ret)); ++ return; ++ } ++ if (set_nonblock(listen_sock) == -1) { ++ close(listen_sock); ++ return; ++ } ++ /* Socket options */ ++ set_reuseaddr(listen_sock); ++ ++ listen_socks[num_listen_socks] = listen_sock; ++ num_listen_socks++; ++ ++ logit("Server listening on %s port %s.", ntop, strport); ++} ++#endif ++ + /* + * Listen for TCP connections + */ +@@ -1104,22 +1152,35 @@ static void + server_listen(void) + { + u_int i; ++#ifdef HAVE_SYSTEMD ++ int systemd_socket_count; ++#endif + + /* Initialise per-source limit tracking. */ + srclimit_init(options.max_startups, options.per_source_max_startups, + options.per_source_masklen_ipv4, options.per_source_masklen_ipv6); + +- for (i = 0; i < options.num_listen_addrs; i++) { +- listen_on_addrs(&options.listen_addrs[i]); +- freeaddrinfo(options.listen_addrs[i].addrs); +- free(options.listen_addrs[i].rdomain); +- memset(&options.listen_addrs[i], 0, +- sizeof(options.listen_addrs[i])); ++#ifdef HAVE_SYSTEMD ++ systemd_socket_count = sd_listen_fds(0); ++ if (systemd_socket_count > 0) ++ { ++ int i; ++ for (i = 0; i < systemd_socket_count; i++) ++ setup_systemd_socket(SD_LISTEN_FDS_START + i); ++ } else ++#endif ++ { ++ for (i = 0; i < options.num_listen_addrs; i++) { ++ listen_on_addrs(&options.listen_addrs[i]); ++ freeaddrinfo(options.listen_addrs[i].addrs); ++ free(options.listen_addrs[i].rdomain); ++ memset(&options.listen_addrs[i], 0, ++ sizeof(options.listen_addrs[i])); ++ } ++ free(options.listen_addrs); ++ options.listen_addrs = NULL; ++ options.num_listen_addrs = 0; + } +- free(options.listen_addrs); +- options.listen_addrs = NULL; +- options.num_listen_addrs = 0; +- + if (!num_listen_socks) + fatal("Cannot bind any address."); + } |