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Fixed textual socket name lengths and Unix domain sockaddr length.

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This commit is contained in:
Igor Sysoev
2017-09-14 18:16:22 +03:00
parent f3280c5dc9
commit 4d5e39e8c1
7 changed files with 79 additions and 43 deletions
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28
src/nxt_conn_accept.c
View File

@@ -117,8 +117,9 @@ nxt_conn_accept_alloc(nxt_task_t *task, nxt_listen_event_t *lev)
sa = ls->sockaddr;
remote->type = sa->type;
/*
* Set address family for unspecified Unix domain,
* because these sockaddr's are not be passed to accept().
* Set address family for unspecified Unix domain socket,
* because these sockaddr's are not updated by old BSD systems,
* see comment in nxt_conn_io_accept().
*/
remote->u.sockaddr.sa_family = sa->u.sockaddr.sa_family;
@@ -149,7 +150,7 @@ nxt_conn_listen_handler(nxt_task_t *task, void *obj, void *data)
void
nxt_conn_io_accept(nxt_task_t *task, void *obj, void *data)
{
socklen_t len;
socklen_t socklen;
nxt_conn_t *c;
nxt_socket_t s;
struct sockaddr *sa;
@@ -161,17 +162,18 @@ nxt_conn_io_accept(nxt_task_t *task, void *obj, void *data)
lev->ready--;
lev->socket.read_ready = (lev->ready != 0);
len = c->remote->socklen;
if (len >= sizeof(struct sockaddr)) {
sa = &c->remote->u.sockaddr;
} else {
sa = NULL;
len = 0;
}
s = accept(lev->socket.fd, sa, &len);
socklen = c->remote->socklen;
/*
* The returned socklen is ignored here, because sockaddr_in and
* sockaddr_in6 socklens are not changed. As to unspecified sockaddr_un
* it is 3 byte length and already prepared, because old BSDs return zero
* socklen and do not update the sockaddr_un at all; Linux returns 2 byte
* socklen and updates only the sa_family part; other systems copy 3 bytes
* and truncate surplus zero part. Only bound sockaddr_un will be really
* truncated here.
*/
s = accept(lev->socket.fd, sa, &socklen);
if (s == -1) {
nxt_conn_accept_error(task, lev, "accept", nxt_socket_errno);

5
src/nxt_controller.c
View File

@@ -281,11 +281,10 @@ nxt_runtime_controller_socket(nxt_task_t *task, nxt_runtime_t *rt)
}
ls->sockaddr->type = sa->type;
ls->socklen = sa->socklen;
ls->address_length = sa->length;
nxt_sockaddr_text(ls->sockaddr);
nxt_listen_socket_remote_size(ls, sa);
ls->socket = -1;
ls->backlog = NXT_LISTEN_BACKLOG;
ls->read_after_accept = 1;

18
src/nxt_epoll_engine.c
View File

@@ -985,7 +985,7 @@ nxt_epoll_poll(nxt_event_engine_t *engine, nxt_msec_t timeout)
static void
nxt_epoll_conn_io_accept4(nxt_task_t *task, void *obj, void *data)
{
socklen_t len;
socklen_t socklen;
nxt_conn_t *c;
nxt_socket_t s;
struct sockaddr *sa;
@@ -997,17 +997,13 @@ nxt_epoll_conn_io_accept4(nxt_task_t *task, void *obj, void *data)
lev->ready--;
lev->socket.read_ready = (lev->ready != 0);
len = c->remote->socklen;
if (len >= sizeof(struct sockaddr)) {
sa = &c->remote->u.sockaddr;
} else {
sa = NULL;
len = 0;
}
s = accept4(lev->socket.fd, sa, &len, SOCK_NONBLOCK);
socklen = c->remote->socklen;
/*
* The returned socklen is ignored here,
* see comment in nxt_conn_io_accept().
*/
s = accept4(lev->socket.fd, sa, &socklen, SOCK_NONBLOCK);
if (s != -1) {
c->socket.fd = s;

18
src/nxt_kqueue_engine.c
View File

@@ -929,7 +929,7 @@ nxt_kqueue_listen_handler(nxt_task_t *task, void *obj, void *data)
static void
nxt_kqueue_conn_io_accept(nxt_task_t *task, void *obj, void *data)
{
socklen_t len;
socklen_t socklen;
nxt_conn_t *c;
nxt_socket_t s;
struct sockaddr *sa;
@@ -944,17 +944,13 @@ nxt_kqueue_conn_io_accept(nxt_task_t *task, void *obj, void *data)
lev->socket.kq_available--;
lev->socket.read_ready = (lev->socket.kq_available != 0);
len = c->remote->socklen;
if (len >= sizeof(struct sockaddr)) {
sa = &c->remote->u.sockaddr;
} else {
sa = NULL;
len = 0;
}
s = accept(lev->socket.fd, sa, &len);
socklen = c->remote->socklen;
/*
* The returned socklen is ignored here,
* see comment in nxt_conn_io_accept().
*/
s = accept(lev->socket.fd, sa, &socklen);
if (s != -1) {
c->socket.fd = s;

41
src/nxt_listen_socket.c
View File

@@ -176,6 +176,47 @@ fail:
}
void
nxt_listen_socket_remote_size(nxt_listen_socket_t *ls, nxt_sockaddr_t *sa)
{
switch (sa->u.sockaddr.sa_family) {
#if (NXT_INET6)
case AF_INET6:
ls->socklen = sizeof(struct sockaddr_in6);
ls->address_length = NXT_INET6_ADDR_STR_LEN;
break;
#endif
#if (NXT_HAVE_UNIX_DOMAIN)
case AF_UNIX:
/*
* A remote socket is usually unbound and thus has unspecified Unix
* domain sockaddr_un which can be shortcut to 3 bytes. To handle
* a bound remote socket correctly ls->socklen should be larger, see
* comment in nxt_socket.h.
*/
ls->socklen = offsetof(struct sockaddr_un, sun_path) + 1;
ls->address_length = sizeof("unix:") - 1;
break;
#endif
default:
case AF_INET:
ls->socklen = sizeof(struct sockaddr_in);
ls->address_length = NXT_INET_ADDR_STR_LEN;
break;
}
}
size_t
nxt_listen_socket_pool_min_size(nxt_listen_socket_t *ls)
{

2
src/nxt_listen_socket.h
View File

@@ -56,6 +56,8 @@ NXT_EXPORT nxt_int_t nxt_listen_socket_create(nxt_task_t *task,
nxt_listen_socket_t *ls, nxt_bool_t bind_test);
NXT_EXPORT nxt_int_t nxt_listen_socket_update(nxt_task_t *task,
nxt_listen_socket_t *ls, nxt_listen_socket_t *prev);
NXT_EXPORT void nxt_listen_socket_remote_size(nxt_listen_socket_t *ls,
nxt_sockaddr_t *sa);
NXT_EXPORT size_t nxt_listen_socket_pool_min_size(nxt_listen_socket_t *ls);

4
src/nxt_router.c
View File

@@ -943,8 +943,8 @@ nxt_router_socket_conf(nxt_task_t *task, nxt_mp_t *mp, nxt_sockaddr_t *sa)
skcf->sockaddr = sa;
skcf->listen.sockaddr = sa;
skcf->listen.socklen = sa->socklen;
skcf->listen.address_length = sa->length;
nxt_listen_socket_remote_size(&skcf->listen, sa);
skcf->listen.socket = -1;
skcf->listen.backlog = NXT_LISTEN_BACKLOG;