int make_socket_fd(int log_level, const char* address, int flags) {
SocketAddress a;
int fd, r;
r = socket_address_parse(&a, address);
if (r < 0) {
log_error("Failed to parse socket address \"%s\": %s",
address, strerror(-r));
return r;
}
fd = socket_address_listen(&a, flags, SOMAXCONN, SOCKET_ADDRESS_DEFAULT,
NULL, false, false, 0755, 0644, NULL);
if (fd < 0 || log_get_max_level() >= log_level) {
_cleanup_free_ char *p = NULL;
r = socket_address_print(&a, &p);
if (r < 0)
return log_error_errno(r, "socket_address_print(): %m");
if (fd < 0)
log_error_errno(fd, "Failed to listen on %s: %m", p);
else
log_full(log_level, "Listening on %s", p);
}
return fd;
}
static int print_socket(const char* desc, int fd) {
int r;
SocketAddress addr = {
.size = sizeof(union sockaddr_union),
.type = SOCK_STREAM,
};
int family;
r = getsockname(fd, &addr.sockaddr.sa, &addr.size);
if (r < 0) {
log_warning("Failed to query socket on fd:%d: %m", fd);
return 0;
}
family = socket_address_family(&addr);
switch(family) {
case AF_INET:
case AF_INET6: {
char* _cleanup_free_ a = NULL;
r = socket_address_print(&addr, &a);
if (r < 0)
log_warning("socket_address_print(): %s", strerror(-r));
else
log_info("%s %s address %s",
desc,
family == AF_INET ? "IP" : "IPv6",
a);
break;
}
default:
log_warning("Connection with unknown family %d", family);
}
return 0;
}
static int open_sockets(int *epoll_fd, bool accept) {
int n, fd;
int count = 0;
char **address;
n = sd_listen_fds(true);
if (n < 0) {
log_error("Failed to read listening file descriptors from environment: %s",
strerror(-n));
return n;
}
log_info("Received %d descriptors", n);
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
log_debug("Received descriptor fd:%d", fd);
print_socket("Listening on", fd);
if (!arg_accept) {
int r = set_nocloexec(fd);
if (r < 0)
return r;
}
count ++;
}
/** Note: we leak some fd's on error here. I doesn't matter
* much, since the program will exit immediately anyway, but
* would be a pain to fix.
*/
STRV_FOREACH(address, arg_listen) {
log_info("Opening address %s", *address);
fd = make_socket_fd(*address, SOCK_STREAM | (arg_accept*SOCK_CLOEXEC));
if (fd < 0) {
log_error("Failed to open '%s': %s", *address, strerror(-fd));
return fd;
}
count ++;
}
