int main(int argc, char *argv[]) {
Context context = {};
int r, n, fd;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
r = sd_event_default(&context.event);
if (r < 0) {
log_error_errno(r, "Failed to allocate event loop: %m");
goto finish;
}
r = sd_resolve_default(&context.resolve);
if (r < 0) {
log_error_errno(r, "Failed to allocate resolver: %m");
goto finish;
}
r = sd_resolve_attach_event(context.resolve, context.event, 0);
if (r < 0) {
log_error_errno(r, "Failed to attach resolver: %m");
goto finish;
}
sd_event_set_watchdog(context.event, true);
n = sd_listen_fds(1);
if (n < 0) {
log_error("Failed to receive sockets from parent.");
r = n;
goto finish;
} else if (n == 0) {
log_error("Didn't get any sockets passed in.");
r = -EINVAL;
goto finish;
}
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
r = add_listen_socket(&context, fd);
if (r < 0)
goto finish;
}
r = sd_event_loop(context.event);
if (r < 0) {
log_error_errno(r, "Failed to run event loop: %m");
goto finish;
}
finish:
context_free(&context);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
static inline int bind_to_one(const char *definition, int default_port, int listen_backlog) {
int added = 0;
struct addrinfo hints;
struct addrinfo *result, *rp;
char buffer[strlen(definition) + 1];
strcpy(buffer, definition);
char buffer2[10 + 1];
snprintfz(buffer2, 10, "%d", default_port);
char *ip = buffer, *port = buffer2;
char *e = ip;
if(*e == '[') {
e = ++ip;
while(*e && *e != ']') e++;
if(*e == ']') {
*e = '\0';
e++;
}
}
else {
while(*e && *e != ':') e++;
}
if(*e == ':') {
port = e + 1;
*e = '\0';
}
if(!*ip || *ip == '*' || !strcmp(ip, "any") || !strcmp(ip, "all"))
ip = NULL;
if(!*port)
port = buffer2;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */
hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */
hints.ai_protocol = 0; /* Any protocol */
hints.ai_canonname = NULL;
hints.ai_addr = NULL;
hints.ai_next = NULL;
int r = getaddrinfo(ip, port, &hints, &result);
if (r != 0) {
error("getaddrinfo('%s', '%s'): %s\n", ip, port, gai_strerror(r));
return -1;
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
int fd = -1;
char rip[INET_ADDRSTRLEN + INET6_ADDRSTRLEN] = "INVALID";
int rport = default_port;
switch (rp->ai_addr->sa_family) {
case AF_INET: {
struct sockaddr_in *sin = (struct sockaddr_in *) rp->ai_addr;
inet_ntop(AF_INET, &sin->sin_addr, rip, INET_ADDRSTRLEN);
rport = ntohs(sin->sin_port);
fd = create_listen_socket4(rip, rport, listen_backlog);
break;
}
case AF_INET6: {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) rp->ai_addr;
inet_ntop(AF_INET6, &sin6->sin6_addr, rip, INET6_ADDRSTRLEN);
rport = ntohs(sin6->sin6_port);
fd = create_listen_socket6(rip, rport, listen_backlog);
break;
}
}
if (fd == -1)
error("Cannot bind to ip '%s', port %d", rip, default_port);
else {
add_listen_socket(fd, rip, rport);
added++;
}
}
return added;
}
