Don't depend on IPv4-mapped IPv6 address to bind to both IPv4
and IPv6. Wrote at: Hakone. Powered by: Warner Losh's scotch whisky. Requested by: nork
This commit is contained in:
Hajimu UMEMOTO
parent
cdeb7b18af
commit
206fe568bf
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=120059
@ -68,16 +68,8 @@ Available options:
|
||||
.It Fl 4
|
||||
When
|
||||
.Fl D
|
||||
is specified, accept IPv4 connections.
|
||||
When
|
||||
.Fl 6
|
||||
is also specified, accept IPv4 connection via
|
||||
.Dv AF_INET6
|
||||
socket.
|
||||
When
|
||||
.Fl 6
|
||||
is not specified, accept IPv4 connection via
|
||||
.Dv AF_INET
|
||||
is specified, accept connections via
|
||||
.Dv AF_INET4
|
||||
socket.
|
||||
.It Fl 6
|
||||
When
|
||||
|
||||
@ -106,7 +106,6 @@ static char version[] = "Version 6.00LS";
|
||||
extern off_t restart_point;
|
||||
extern char cbuf[];
|
||||
|
||||
union sockunion server_addr;
|
||||
union sockunion ctrl_addr;
|
||||
union sockunion data_source;
|
||||
union sockunion data_dest;
|
||||
@ -258,6 +257,7 @@ static char *sgetsave(char *);
|
||||
static void reapchild(int);
|
||||
static void logxfer(char *, off_t, time_t);
|
||||
static char *doublequote(char *);
|
||||
static int *socksetup(int, char *, const char *);
|
||||
|
||||
static char *
|
||||
curdir(void)
|
||||
@ -282,7 +282,6 @@ main(int argc, char *argv[], char **envp)
|
||||
char *bindname = NULL;
|
||||
const char *bindport = "ftp";
|
||||
int family = AF_UNSPEC;
|
||||
int enable_v4 = 0;
|
||||
struct sigaction sa;
|
||||
|
||||
tzset(); /* in case no timezone database in ~ftp */
|
||||
@ -304,13 +303,11 @@ main(int argc, char *argv[], char **envp)
|
||||
"46a:AdDEhlmMoOp:P:rRSt:T:u:UvW")) != -1) {
|
||||
switch (ch) {
|
||||
case '4':
|
||||
enable_v4 = 1;
|
||||
if (family == AF_UNSPEC)
|
||||
family = AF_INET;
|
||||
family = (family == AF_INET6) ? AF_UNSPEC : AF_INET;
|
||||
break;
|
||||
|
||||
case '6':
|
||||
family = AF_INET6;
|
||||
family = (family == AF_INET) ? AF_UNSPEC : AF_INET6;
|
||||
break;
|
||||
|
||||
case 'a':
|
||||
@ -430,8 +427,9 @@ main(int argc, char *argv[], char **envp)
|
||||
openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
|
||||
|
||||
if (daemon_mode) {
|
||||
int ctl_sock, fd;
|
||||
struct addrinfo hints, *res;
|
||||
int *ctl_sock, fd, maxfd = -1, nfds, i;
|
||||
fd_set defreadfds, readfds;
|
||||
pid_t pid;
|
||||
|
||||
/*
|
||||
* Detach from parent.
|
||||
@ -442,61 +440,26 @@ main(int argc, char *argv[], char **envp)
|
||||
}
|
||||
sa.sa_handler = reapchild;
|
||||
(void)sigaction(SIGCHLD, &sa, NULL);
|
||||
/* init bind_sa */
|
||||
memset(&hints, 0, sizeof(hints));
|
||||
|
||||
hints.ai_family = family == AF_UNSPEC ? AF_INET : family;
|
||||
hints.ai_socktype = SOCK_STREAM;
|
||||
hints.ai_protocol = 0;
|
||||
hints.ai_flags = AI_PASSIVE;
|
||||
error = getaddrinfo(bindname, bindport, &hints, &res);
|
||||
if (error) {
|
||||
if (family == AF_UNSPEC) {
|
||||
hints.ai_family = AF_UNSPEC;
|
||||
error = getaddrinfo(bindname, bindport, &hints,
|
||||
&res);
|
||||
}
|
||||
}
|
||||
if (error) {
|
||||
syslog(LOG_ERR, "%s", gai_strerror(error));
|
||||
if (error == EAI_SYSTEM)
|
||||
syslog(LOG_ERR, "%s", strerror(errno));
|
||||
exit(1);
|
||||
}
|
||||
if (res->ai_addr == NULL) {
|
||||
syslog(LOG_ERR, "-a %s: getaddrinfo failed", hostname);
|
||||
exit(1);
|
||||
} else
|
||||
family = res->ai_addr->sa_family;
|
||||
/*
|
||||
* Open a socket, bind it to the FTP port, and start
|
||||
* listening.
|
||||
*/
|
||||
ctl_sock = socket(family, SOCK_STREAM, 0);
|
||||
if (ctl_sock < 0) {
|
||||
syslog(LOG_ERR, "control socket: %m");
|
||||
exit(1);
|
||||
}
|
||||
if (setsockopt(ctl_sock, SOL_SOCKET, SO_REUSEADDR,
|
||||
&on, sizeof(on)) < 0)
|
||||
syslog(LOG_WARNING,
|
||||
"control setsockopt (SO_REUSEADDR): %m");
|
||||
if (family == AF_INET6 && enable_v4 == 0) {
|
||||
if (setsockopt(ctl_sock, IPPROTO_IPV6, IPV6_V6ONLY,
|
||||
&on, sizeof (on)) < 0)
|
||||
syslog(LOG_WARNING,
|
||||
"control setsockopt (IPV6_V6ONLY): %m");
|
||||
}
|
||||
memcpy(&server_addr, res->ai_addr, res->ai_addr->sa_len);
|
||||
if (bind(ctl_sock, (struct sockaddr *)&server_addr,
|
||||
server_addr.su_len) < 0) {
|
||||
syslog(LOG_ERR, "control bind: %m");
|
||||
exit(1);
|
||||
}
|
||||
if (listen(ctl_sock, 32) < 0) {
|
||||
syslog(LOG_ERR, "control listen: %m");
|
||||
ctl_sock = socksetup(family, bindname, bindport);
|
||||
if (ctl_sock == NULL)
|
||||
exit(1);
|
||||
|
||||
FD_ZERO(&defreadfds);
|
||||
for (i = 1; i <= *ctl_sock; i++) {
|
||||
FD_SET(ctl_sock[i], &defreadfds);
|
||||
if (listen(ctl_sock[i], 32) < 0) {
|
||||
syslog(LOG_ERR, "control listen: %m");
|
||||
exit(1);
|
||||
}
|
||||
if (maxfd < ctl_sock[i])
|
||||
maxfd = ctl_sock[i];
|
||||
}
|
||||
|
||||
/*
|
||||
* Atomically write process ID
|
||||
*/
|
||||
@ -524,16 +487,31 @@ main(int argc, char *argv[], char **envp)
|
||||
* children to handle them.
|
||||
*/
|
||||
while (1) {
|
||||
addrlen = server_addr.su_len;
|
||||
fd = accept(ctl_sock, (struct sockaddr *)&his_addr, &addrlen);
|
||||
if (fork() == 0) {
|
||||
/* child */
|
||||
(void) dup2(fd, 0);
|
||||
(void) dup2(fd, 1);
|
||||
close(ctl_sock);
|
||||
break;
|
||||
FD_COPY(&defreadfds, &readfds);
|
||||
nfds = select(maxfd + 1, &readfds, NULL, NULL, 0);
|
||||
if (nfds <= 0) {
|
||||
if (nfds < 0 && errno != EINTR)
|
||||
syslog(LOG_WARNING, "select: %m");
|
||||
continue;
|
||||
}
|
||||
close(fd);
|
||||
|
||||
pid = -1;
|
||||
for (i = 1; i <= *ctl_sock; i++)
|
||||
if (FD_ISSET(ctl_sock[i], &readfds)) {
|
||||
addrlen = sizeof(his_addr);
|
||||
fd = accept(ctl_sock[i],
|
||||
(struct sockaddr *)&his_addr,
|
||||
&addrlen);
|
||||
if ((pid = fork()) == 0) {
|
||||
/* child */
|
||||
(void) dup2(fd, 0);
|
||||
(void) dup2(fd, 1);
|
||||
close(ctl_sock[i]);
|
||||
} else
|
||||
close(fd);
|
||||
}
|
||||
if (pid == 0)
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
addrlen = sizeof(his_addr);
|
||||
@ -3162,3 +3140,73 @@ doublequote(char *s)
|
||||
|
||||
return (s2);
|
||||
}
|
||||
|
||||
/* setup server socket for specified address family */
|
||||
/* if af is PF_UNSPEC more than one socket may be returned */
|
||||
/* the returned list is dynamically allocated, so caller needs to free it */
|
||||
static int *
|
||||
socksetup(int af, char *bindname, const char *bindport)
|
||||
{
|
||||
struct addrinfo hints, *res, *r;
|
||||
int error, maxs, *s, *socks;
|
||||
const int on = 1;
|
||||
|
||||
memset(&hints, 0, sizeof(hints));
|
||||
hints.ai_flags = AI_PASSIVE;
|
||||
hints.ai_family = af;
|
||||
hints.ai_socktype = SOCK_STREAM;
|
||||
error = getaddrinfo(bindname, bindport, &hints, &res);
|
||||
if (error) {
|
||||
syslog(LOG_ERR, "%s", gai_strerror(error));
|
||||
if (error == EAI_SYSTEM)
|
||||
syslog(LOG_ERR, "%s", strerror(errno));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Count max number of sockets we may open */
|
||||
for (maxs = 0, r = res; r; r = r->ai_next, maxs++)
|
||||
;
|
||||
socks = malloc((maxs + 1) * sizeof(int));
|
||||
if (!socks) {
|
||||
freeaddrinfo(res);
|
||||
syslog(LOG_ERR, "couldn't allocate memory for sockets");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
*socks = 0; /* num of sockets counter at start of array */
|
||||
s = socks + 1;
|
||||
for (r = res; r; r = r->ai_next) {
|
||||
*s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
|
||||
if (*s < 0) {
|
||||
syslog(LOG_DEBUG, "control socket: %m");
|
||||
continue;
|
||||
}
|
||||
if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
|
||||
&on, sizeof(on)) < 0)
|
||||
syslog(LOG_WARNING,
|
||||
"control setsockopt (SO_REUSEADDR): %m");
|
||||
if (r->ai_family == AF_INET6) {
|
||||
if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
|
||||
&on, sizeof(on)) < 0)
|
||||
syslog(LOG_WARNING,
|
||||
"control setsockopt (IPV6_V6ONLY): %m");
|
||||
}
|
||||
if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
|
||||
syslog(LOG_DEBUG, "control bind: %m");
|
||||
close(*s);
|
||||
continue;
|
||||
}
|
||||
(*socks)++;
|
||||
s++;
|
||||
}
|
||||
|
||||
if (res)
|
||||
freeaddrinfo(res);
|
||||
|
||||
if (*socks == 0) {
|
||||
syslog(LOG_ERR, "control socket: Couldn't bind to any socket");
|
||||
free(socks);
|
||||
return NULL;
|
||||
}
|
||||
return(socks);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user