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Diffstat (limited to 'openssl-1.1.0h/crypto/bio/bss_acpt.c')
-rw-r--r--openssl-1.1.0h/crypto/bio/bss_acpt.c562
1 files changed, 562 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/bio/bss_acpt.c b/openssl-1.1.0h/crypto/bio/bss_acpt.c
new file mode 100644
index 0000000..21d21c1
--- /dev/null
+++ b/openssl-1.1.0h/crypto/bio/bss_acpt.c
@@ -0,0 +1,562 @@
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include "bio_lcl.h"
+
+#ifndef OPENSSL_NO_SOCK
+
+typedef struct bio_accept_st {
+ int state;
+ int accept_family;
+ int bind_mode; /* Socket mode for BIO_listen */
+ int accepted_mode; /* Socket mode for BIO_accept (set on accepted sock) */
+ char *param_addr;
+ char *param_serv;
+
+ int accept_sock;
+
+ BIO_ADDRINFO *addr_first;
+ const BIO_ADDRINFO *addr_iter;
+ BIO_ADDR cache_accepting_addr; /* Useful if we asked for port 0 */
+ char *cache_accepting_name, *cache_accepting_serv;
+ BIO_ADDR cache_peer_addr;
+ char *cache_peer_name, *cache_peer_serv;
+
+ BIO *bio_chain;
+} BIO_ACCEPT;
+
+static int acpt_write(BIO *h, const char *buf, int num);
+static int acpt_read(BIO *h, char *buf, int size);
+static int acpt_puts(BIO *h, const char *str);
+static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int acpt_new(BIO *h);
+static int acpt_free(BIO *data);
+static int acpt_state(BIO *b, BIO_ACCEPT *c);
+static void acpt_close_socket(BIO *data);
+static BIO_ACCEPT *BIO_ACCEPT_new(void);
+static void BIO_ACCEPT_free(BIO_ACCEPT *a);
+
+# define ACPT_S_BEFORE 1
+# define ACPT_S_GET_ADDR 2
+# define ACPT_S_CREATE_SOCKET 3
+# define ACPT_S_LISTEN 4
+# define ACPT_S_ACCEPT 5
+# define ACPT_S_OK 6
+
+static const BIO_METHOD methods_acceptp = {
+ BIO_TYPE_ACCEPT,
+ "socket accept",
+ acpt_write,
+ acpt_read,
+ acpt_puts,
+ NULL, /* connect_gets, */
+ acpt_ctrl,
+ acpt_new,
+ acpt_free,
+ NULL, /* connect_callback_ctrl */
+};
+
+const BIO_METHOD *BIO_s_accept(void)
+{
+ return (&methods_acceptp);
+}
+
+static int acpt_new(BIO *bi)
+{
+ BIO_ACCEPT *ba;
+
+ bi->init = 0;
+ bi->num = (int)INVALID_SOCKET;
+ bi->flags = 0;
+ if ((ba = BIO_ACCEPT_new()) == NULL)
+ return (0);
+ bi->ptr = (char *)ba;
+ ba->state = ACPT_S_BEFORE;
+ bi->shutdown = 1;
+ return (1);
+}
+
+static BIO_ACCEPT *BIO_ACCEPT_new(void)
+{
+ BIO_ACCEPT *ret;
+
+ if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
+ return (NULL);
+ ret->accept_family = BIO_FAMILY_IPANY;
+ ret->accept_sock = (int)INVALID_SOCKET;
+ return (ret);
+}
+
+static void BIO_ACCEPT_free(BIO_ACCEPT *a)
+{
+ if (a == NULL)
+ return;
+
+ OPENSSL_free(a->param_addr);
+ OPENSSL_free(a->param_serv);
+ BIO_ADDRINFO_free(a->addr_first);
+ OPENSSL_free(a->cache_accepting_name);
+ OPENSSL_free(a->cache_accepting_serv);
+ OPENSSL_free(a->cache_peer_name);
+ OPENSSL_free(a->cache_peer_serv);
+ BIO_free(a->bio_chain);
+ OPENSSL_free(a);
+}
+
+static void acpt_close_socket(BIO *bio)
+{
+ BIO_ACCEPT *c;
+
+ c = (BIO_ACCEPT *)bio->ptr;
+ if (c->accept_sock != (int)INVALID_SOCKET) {
+ shutdown(c->accept_sock, 2);
+ closesocket(c->accept_sock);
+ c->accept_sock = (int)INVALID_SOCKET;
+ bio->num = (int)INVALID_SOCKET;
+ }
+}
+
+static int acpt_free(BIO *a)
+{
+ BIO_ACCEPT *data;
+
+ if (a == NULL)
+ return (0);
+ data = (BIO_ACCEPT *)a->ptr;
+
+ if (a->shutdown) {
+ acpt_close_socket(a);
+ BIO_ACCEPT_free(data);
+ a->ptr = NULL;
+ a->flags = 0;
+ a->init = 0;
+ }
+ return (1);
+}
+
+static int acpt_state(BIO *b, BIO_ACCEPT *c)
+{
+ BIO *bio = NULL, *dbio;
+ int s = -1, ret = -1;
+
+ for (;;) {
+ switch (c->state) {
+ case ACPT_S_BEFORE:
+ if (c->param_addr == NULL && c->param_serv == NULL) {
+ BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_ADDR_OR_SERVICE_SPECIFIED);
+ ERR_add_error_data(4,
+ "hostname=", c->param_addr,
+ " service=", c->param_serv);
+ goto exit_loop;
+ }
+
+ /* Because we're starting a new bind, any cached name and serv
+ * are now obsolete and need to be cleaned out.
+ * QUESTION: should this be done in acpt_close_socket() instead?
+ */
+ OPENSSL_free(c->cache_accepting_name);
+ c->cache_accepting_name = NULL;
+ OPENSSL_free(c->cache_accepting_serv);
+ c->cache_accepting_serv = NULL;
+ OPENSSL_free(c->cache_peer_name);
+ c->cache_peer_name = NULL;
+ OPENSSL_free(c->cache_peer_serv);
+ c->cache_peer_serv = NULL;
+
+ c->state = ACPT_S_GET_ADDR;
+ break;
+
+ case ACPT_S_GET_ADDR:
+ {
+ int family = AF_UNSPEC;
+ switch (c->accept_family) {
+ case BIO_FAMILY_IPV6:
+ if (1) { /* This is a trick we use to avoid bit rot.
+ * at least the "else" part will always be
+ * compiled.
+ */
+#ifdef AF_INET6
+ family = AF_INET6;
+ } else {
+#endif
+ BIOerr(BIO_F_ACPT_STATE, BIO_R_UNAVAILABLE_IP_FAMILY);
+ goto exit_loop;
+ }
+ break;
+ case BIO_FAMILY_IPV4:
+ family = AF_INET;
+ break;
+ case BIO_FAMILY_IPANY:
+ family = AF_UNSPEC;
+ break;
+ default:
+ BIOerr(BIO_F_ACPT_STATE, BIO_R_UNSUPPORTED_IP_FAMILY);
+ goto exit_loop;
+ }
+ if (BIO_lookup(c->param_addr, c->param_serv, BIO_LOOKUP_SERVER,
+ family, SOCK_STREAM, &c->addr_first) == 0)
+ goto exit_loop;
+ }
+ if (c->addr_first == NULL) {
+ BIOerr(BIO_F_ACPT_STATE, BIO_R_LOOKUP_RETURNED_NOTHING);
+ goto exit_loop;
+ }
+ /* We're currently not iterating, but set this as preparation
+ * for possible future development in that regard
+ */
+ c->addr_iter = c->addr_first;
+ c->state = ACPT_S_CREATE_SOCKET;
+ break;
+
+ case ACPT_S_CREATE_SOCKET:
+ ret = BIO_socket(BIO_ADDRINFO_family(c->addr_iter),
+ BIO_ADDRINFO_socktype(c->addr_iter),
+ BIO_ADDRINFO_protocol(c->addr_iter), 0);
+ if (ret == (int)INVALID_SOCKET) {
+ SYSerr(SYS_F_SOCKET, get_last_socket_error());
+ ERR_add_error_data(4,
+ "hostname=", c->param_addr,
+ " service=", c->param_serv);
+ BIOerr(BIO_F_ACPT_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET);
+ goto exit_loop;
+ }
+ c->accept_sock = ret;
+ b->num = ret;
+ c->state = ACPT_S_LISTEN;
+ break;
+
+ case ACPT_S_LISTEN:
+ {
+ if (!BIO_listen(c->accept_sock,
+ BIO_ADDRINFO_address(c->addr_iter),
+ c->bind_mode)) {
+ BIO_closesocket(c->accept_sock);
+ goto exit_loop;
+ }
+ }
+
+ {
+ union BIO_sock_info_u info;
+
+ info.addr = &c->cache_accepting_addr;
+ if (!BIO_sock_info(c->accept_sock, BIO_SOCK_INFO_ADDRESS,
+ &info)) {
+ BIO_closesocket(c->accept_sock);
+ goto exit_loop;
+ }
+ }
+
+ c->cache_accepting_name =
+ BIO_ADDR_hostname_string(&c->cache_accepting_addr, 1);
+ c->cache_accepting_serv =
+ BIO_ADDR_service_string(&c->cache_accepting_addr, 1);
+ c->state = ACPT_S_ACCEPT;
+ s = -1;
+ ret = 1;
+ goto end;
+
+ case ACPT_S_ACCEPT:
+ if (b->next_bio != NULL) {
+ c->state = ACPT_S_OK;
+ break;
+ }
+ BIO_clear_retry_flags(b);
+ b->retry_reason = 0;
+
+ OPENSSL_free(c->cache_peer_name);
+ c->cache_peer_name = NULL;
+ OPENSSL_free(c->cache_peer_serv);
+ c->cache_peer_serv = NULL;
+
+ s = BIO_accept_ex(c->accept_sock, &c->cache_peer_addr,
+ c->accepted_mode);
+
+ /* If the returned socket is invalid, this might still be
+ * retryable
+ */
+ if (s < 0) {
+ if (BIO_sock_should_retry(s)) {
+ BIO_set_retry_special(b);
+ b->retry_reason = BIO_RR_ACCEPT;
+ goto end;
+ }
+ }
+
+ /* If it wasn't retryable, we fail */
+ if (s < 0) {
+ ret = s;
+ goto exit_loop;
+ }
+
+ bio = BIO_new_socket(s, BIO_CLOSE);
+ if (bio == NULL)
+ goto exit_loop;
+
+ BIO_set_callback(bio, BIO_get_callback(b));
+ BIO_set_callback_arg(bio, BIO_get_callback_arg(b));
+
+ /*
+ * If the accept BIO has an bio_chain, we dup it and put the new
+ * socket at the end.
+ */
+ if (c->bio_chain != NULL) {
+ if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL)
+ goto exit_loop;
+ if (!BIO_push(dbio, bio))
+ goto exit_loop;
+ bio = dbio;
+ }
+ if (BIO_push(b, bio) == NULL)
+ goto exit_loop;
+
+ c->cache_peer_name =
+ BIO_ADDR_hostname_string(&c->cache_peer_addr, 1);
+ c->cache_peer_serv =
+ BIO_ADDR_service_string(&c->cache_peer_addr, 1);
+ c->state = ACPT_S_OK;
+ bio = NULL;
+ ret = 1;
+ goto end;
+
+ case ACPT_S_OK:
+ if (b->next_bio == NULL) {
+ c->state = ACPT_S_ACCEPT;
+ break;
+ }
+ ret = 1;
+ goto end;
+
+ default:
+ ret = 0;
+ goto end;
+ }
+ }
+
+ exit_loop:
+ if (bio != NULL)
+ BIO_free(bio);
+ else if (s >= 0)
+ BIO_closesocket(s);
+ end:
+ return ret;
+}
+
+static int acpt_read(BIO *b, char *out, int outl)
+{
+ int ret = 0;
+ BIO_ACCEPT *data;
+
+ BIO_clear_retry_flags(b);
+ data = (BIO_ACCEPT *)b->ptr;
+
+ while (b->next_bio == NULL) {
+ ret = acpt_state(b, data);
+ if (ret <= 0)
+ return (ret);
+ }
+
+ ret = BIO_read(b->next_bio, out, outl);
+ BIO_copy_next_retry(b);
+ return (ret);
+}
+
+static int acpt_write(BIO *b, const char *in, int inl)
+{
+ int ret;
+ BIO_ACCEPT *data;
+
+ BIO_clear_retry_flags(b);
+ data = (BIO_ACCEPT *)b->ptr;
+
+ while (b->next_bio == NULL) {
+ ret = acpt_state(b, data);
+ if (ret <= 0)
+ return (ret);
+ }
+
+ ret = BIO_write(b->next_bio, in, inl);
+ BIO_copy_next_retry(b);
+ return (ret);
+}
+
+static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr)
+{
+ int *ip;
+ long ret = 1;
+ BIO_ACCEPT *data;
+ char **pp;
+
+ data = (BIO_ACCEPT *)b->ptr;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ ret = 0;
+ data->state = ACPT_S_BEFORE;
+ acpt_close_socket(b);
+ BIO_ADDRINFO_free(data->addr_first);
+ data->addr_first = NULL;
+ b->flags = 0;
+ break;
+ case BIO_C_DO_STATE_MACHINE:
+ /* use this one to start the connection */
+ ret = (long)acpt_state(b, data);
+ break;
+ case BIO_C_SET_ACCEPT:
+ if (ptr != NULL) {
+ if (num == 0) {
+ char *hold_serv = data->param_serv;
+ /* We affect the hostname regardless. However, the input
+ * string might contain a host:service spec, so we must
+ * parse it, which might or might not affect the service
+ */
+ OPENSSL_free(data->param_addr);
+ data->param_addr = NULL;
+ ret = BIO_parse_hostserv(ptr,
+ &data->param_addr,
+ &data->param_serv,
+ BIO_PARSE_PRIO_SERV);
+ if (hold_serv != data->param_serv)
+ OPENSSL_free(hold_serv);
+ b->init = 1;
+ } else if (num == 1) {
+ OPENSSL_free(data->param_serv);
+ data->param_serv = BUF_strdup(ptr);
+ b->init = 1;
+ } else if (num == 2) {
+ data->bind_mode |= BIO_SOCK_NONBLOCK;
+ } else if (num == 3) {
+ BIO_free(data->bio_chain);
+ data->bio_chain = (BIO *)ptr;
+ } else if (num == 4) {
+ data->accept_family = *(int *)ptr;
+ }
+ } else {
+ if (num == 2) {
+ data->bind_mode &= ~BIO_SOCK_NONBLOCK;
+ }
+ }
+ break;
+ case BIO_C_SET_NBIO:
+ if (num != 0)
+ data->accepted_mode |= BIO_SOCK_NONBLOCK;
+ else
+ data->accepted_mode &= ~BIO_SOCK_NONBLOCK;
+ break;
+ case BIO_C_SET_FD:
+ b->init = 1;
+ b->num = *((int *)ptr);
+ data->accept_sock = b->num;
+ data->state = ACPT_S_ACCEPT;
+ b->shutdown = (int)num;
+ b->init = 1;
+ break;
+ case BIO_C_GET_FD:
+ if (b->init) {
+ ip = (int *)ptr;
+ if (ip != NULL)
+ *ip = data->accept_sock;
+ ret = data->accept_sock;
+ } else
+ ret = -1;
+ break;
+ case BIO_C_GET_ACCEPT:
+ if (b->init) {
+ if (num == 0 && ptr != NULL) {
+ pp = (char **)ptr;
+ *pp = data->cache_accepting_name;
+ } else if (num == 1 && ptr != NULL) {
+ pp = (char **)ptr;
+ *pp = data->cache_accepting_serv;
+ } else if (num == 2 && ptr != NULL) {
+ pp = (char **)ptr;
+ *pp = data->cache_peer_name;
+ } else if (num == 3 && ptr != NULL) {
+ pp = (char **)ptr;
+ *pp = data->cache_peer_serv;
+ } else if (num == 4) {
+ switch (BIO_ADDRINFO_family(data->addr_iter)) {
+#ifdef AF_INET6
+ case AF_INET6:
+ ret = BIO_FAMILY_IPV6;
+ break;
+#endif
+ case AF_INET:
+ ret = BIO_FAMILY_IPV4;
+ break;
+ case 0:
+ ret = data->accept_family;
+ break;
+ default:
+ ret = -1;
+ break;
+ }
+ } else
+ ret = -1;
+ } else
+ ret = -1;
+ break;
+ case BIO_CTRL_GET_CLOSE:
+ ret = b->shutdown;
+ break;
+ case BIO_CTRL_SET_CLOSE:
+ b->shutdown = (int)num;
+ break;
+ case BIO_CTRL_PENDING:
+ case BIO_CTRL_WPENDING:
+ ret = 0;
+ break;
+ case BIO_CTRL_FLUSH:
+ break;
+ case BIO_C_SET_BIND_MODE:
+ data->bind_mode = (int)num;
+ break;
+ case BIO_C_GET_BIND_MODE:
+ ret = (long)data->bind_mode;
+ break;
+ case BIO_CTRL_DUP:
+/*- dbio=(BIO *)ptr;
+ if (data->param_port) EAY EAY
+ BIO_set_port(dbio,data->param_port);
+ if (data->param_hostname)
+ BIO_set_hostname(dbio,data->param_hostname);
+ BIO_set_nbio(dbio,data->nbio); */
+ break;
+
+ default:
+ ret = 0;
+ break;
+ }
+ return (ret);
+}
+
+static int acpt_puts(BIO *bp, const char *str)
+{
+ int n, ret;
+
+ n = strlen(str);
+ ret = acpt_write(bp, str, n);
+ return (ret);
+}
+
+BIO *BIO_new_accept(const char *str)
+{
+ BIO *ret;
+
+ ret = BIO_new(BIO_s_accept());
+ if (ret == NULL)
+ return (NULL);
+ if (BIO_set_accept_name(ret, str))
+ return (ret);
+ BIO_free(ret);
+ return (NULL);
+}
+
+#endif
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