497 lines
18 KiB
C
497 lines
18 KiB
C
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <arpa/inet.h>
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#define USSL_SCRAMBLE_LEN 16
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#define USSL_MAX_KEY_LEN 16
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#define AUTH_TYPE_STRING_MAX_LEN 32
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enum ClientNegoStage {
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SEND_FIRST_NEGO_MESSAGE = 1,
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DOING_SSL_HANSHAKE = 2,
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};
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enum ServerNegoStage {
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SERVER_ACCEPT_CONNECTION = 1,
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SERVER_ACK_NEGO_AND_AUTH = 2,
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SERVER_ACK_NEGO_AND_SSL = 3,
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};
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static void auth_type_to_str(int auth_type, char *buf, size_t len)
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{
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if (USSL_AUTH_NONE == auth_type) {
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strncpy(buf, "NONE", len);
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} else if (USSL_AUTH_SSL_HANDSHAKE == auth_type) {
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strncpy(buf, "SSL_NO_ENCRYPT", len);
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} else if (USSL_AUTH_SSL_IO == auth_type) {
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strncpy(buf, "SSL_IO", len);
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}
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}
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static void get_client_addr(int fd, char *buf, int len)
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{
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struct sockaddr_storage addr;
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socklen_t sock_len = sizeof(addr);
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if (0 != getsockname(fd, (struct sockaddr *)&addr, &sock_len)) {
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ussl_log_warn("getsockname failed, fd:%d, errno:%d", fd, errno);
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} else {
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char src_addr[INET6_ADDRSTRLEN];
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if (AF_INET == addr.ss_family) {
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struct sockaddr_in *s = (struct sockaddr_in *)&addr;
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if (NULL != inet_ntop(AF_INET, &s->sin_addr, src_addr, INET_ADDRSTRLEN)) {
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if (snprintf(buf, len, "%s:%d", src_addr, ntohs(s->sin_port)) < 0) {
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ussl_log_warn("snprintf failed, errno:%d", errno);
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}
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} else {
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ussl_log_warn("call inet_ntop for AF_INET failed, errno:%d", errno);
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}
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} else {
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struct sockaddr_in6 *s = (struct sockaddr_in6 *)&addr;
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if (NULL != inet_ntop(AF_INET6, &s->sin6_addr, src_addr, INET6_ADDRSTRLEN)) {
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if (snprintf(buf, len, "[%s]:%d", src_addr, ntohs(s->sin6_port)) < 0) {
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ussl_log_warn("snprintf failed, errno:%d", errno);
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}
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} else {
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ussl_log_warn("call inet_ntop for AF_INET6 failed, errno:%d", errno);
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}
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}
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}
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}
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static int epoll_unregist_and_give_back(clientfd_sk_t *cs, int need_close)
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{
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int ret = 0;
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char client_addr[IP_STRING_MAX_LEN] = {0};
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get_client_addr(cs->fd_info.client_fd, client_addr, IP_STRING_MAX_LEN);
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if (need_close && cs->fd >= 0) {
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shutdown(cs->fd, SHUT_WR);
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}
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if (0 != (ret = libc_epoll_ctl(cs->ep->fd, EPOLL_CTL_DEL, cs->fd, NULL))) {
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ussl_log_warn("delete client fd from epoll failed, epfd:%d, fd:%d, errno:%d", cs->ep->fd,
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cs->fd, errno);
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} else if (0 != (ret = libc_epoll_ctl(cs->fd_info.org_epfd, EPOLL_CTL_ADD,
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cs->fd_info.client_fd, &cs->fd_info.event))) {
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ussl_log_warn("give back fd to origin epoll failed, fd:%d, errno:%d", cs->fd_info.client_fd,
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errno);
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} else {
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ussl_log_info("give back fd to origin epoll succ, client_fd:%d, client_epfd:%d, event:0x%x, client_addr:%s, need_close:%d",
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cs->fd_info.client_fd, cs->fd_info.org_epfd, cs->fd_info.event.events, client_addr, need_close);
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}
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cs->fd = -1;
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return ret;
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}
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static int is_local_ip_address(const char *addr)
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{
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int ret = 0;
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if (NULL != strstr(addr, "127.0.0.1")) {
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ret = 1;
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}
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return ret;
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}
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static int handle_client_writable_event(ussl_sock_t *s)
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{
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int ret = EAGAIN;
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int err = 0;
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int so_error = 0;
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int need_giveback = 0;
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socklen_t len = sizeof(err);
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clientfd_sk_t *cs = (clientfd_sk_t *)s;
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if (-1 == (err = getsockopt(cs->fd, SOL_SOCKET, SO_ERROR, (void *)&so_error, &len))) {
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ussl_log_error("call getsockopt failed, fd:%d, errno:%d", cs->fd, errno);
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} else if (0 != so_error) {
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ussl_log_warn("there is an error on the socket, fd:%d, so_error:%d", cs->fd, so_error);
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} else {
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// 1.remode EPOLLOUT & add EPOLLIN
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cs->mask &= ~EPOLLOUT;
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struct epoll_event event;
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uint32_t new_flags = EPOLLIN | EPOLLERR;
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int client_am = get_client_auth_methods();
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if (0 != (err = libc_epoll_ctl(cs->ep->fd, EPOLL_CTL_MOD, cs->fd,
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ussl_make_epoll_event(&event, new_flags, (ussl_sock_t *)cs)))) {
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ussl_log_error("modify epoll flag failed, fd:%d, errno:%d", cs->fd, errno);
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} else { // 3.send negotiation message
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int need_send_negotiation = 1;
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if (USSL_AUTH_NONE == client_am) {
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if (1 == cs->fd_info.send_negotiation) {
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need_send_negotiation = 1;
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} else {
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need_send_negotiation = 0;
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}
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need_giveback = 1;
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} else {
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need_send_negotiation = 1;
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}
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if (1 == need_send_negotiation) {
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negotiation_message_t nego_msg;
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nego_msg.type = client_am;
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nego_msg.client_gid = cs->fd_info.client_gid;
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if (0 != (err = send_negotiation_message(cs->fd, (char *)&nego_msg, sizeof(nego_msg)))) {
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ussl_log_warn("send negotiation message failed, fd:%d, err:%d, errno:%d", cs->fd, err,
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errno);
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} else { // 4.add to timeout list (if needed)
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// succ log
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char client_addr[IP_STRING_MAX_LEN] = {0};
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get_client_addr(cs->fd, client_addr, IP_STRING_MAX_LEN);
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char auth_type[AUTH_TYPE_STRING_MAX_LEN] = {0};
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auth_type_to_str(nego_msg.type, auth_type, AUTH_TYPE_STRING_MAX_LEN);
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ussl_log_info("client send negotiation message succ, fd:%d, addr:%s, auth_method:%s, gid:0x%lx",
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cs->fd, client_addr, auth_type, cs->fd_info.client_gid);
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if (USSL_AUTH_NONE == client_am) {
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need_giveback = 1;
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} else {
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if (is_local_ip_address(client_addr)) {
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need_giveback = 1;
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} else {
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cs->start_time = time(NULL);
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add_to_timeout_list(&cs->timeout_link);
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cs->fd_info.stage = SEND_FIRST_NEGO_MESSAGE;
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ret = EAGAIN;
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}
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}
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}
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}
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}
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}
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if (0 != err || 0 != so_error || need_giveback) {
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int need_close = ((err != 0) || (so_error != 0)) ? 1 : 0;
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if (0 != (err = epoll_unregist_and_give_back(cs, need_close))) {
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ussl_log_warn("epoll_unregist_and_give_back failed, fd:%d, err:%d", cs->fd, err);
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}
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ret = EUCLEAN;
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}
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return ret;
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}
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static void client_stop_timer_and_give_back_fd(clientfd_sk_t *cs, int need_close)
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{
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int err = 0;
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remove_from_timeout_list(&cs->timeout_link);
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if (0 != (err = epoll_unregist_and_give_back(cs, need_close))) {
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ussl_log_warn("unregist and give back failed, fd:%d, err:%d", cs->fd, err);
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}
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}
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static void handle_recv_fail(ssize_t rbytes, clientfd_sk_t *s, int *ret)
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{
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if (0 == rbytes) {
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ussl_log_info("read EOF, peer close connection, fd:%d", s->fd);
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client_stop_timer_and_give_back_fd(s, 1);
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*ret = EUCLEAN;
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} else {
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if (EINTR == errno) {
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*ret = 0;
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} else if (EAGAIN == errno || EWOULDBLOCK == errno) {
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s->mask &= ~EPOLLIN;
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*ret = EAGAIN;
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} else {
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ussl_log_warn("read failed, fd:%d, errno:%d", s->fd, errno);
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client_stop_timer_and_give_back_fd(s, 1);
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*ret = EUCLEAN;
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}
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}
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}
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static int client_do_ssl_handshake(clientfd_sk_t *cs)
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{
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int ret = EAGAIN;
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int err = 0;
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err = ssl_do_handshake(cs->fd);
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if (0 == err) {
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// stop timer and give back
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client_stop_timer_and_give_back_fd(cs, 0);
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ret = EUCLEAN;
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} else if (EAGAIN == err) {
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ret = EAGAIN;
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} else {
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ussl_log_warn("client do ssl handshake failed, fd:%d, err:%d, errno:%d", cs->fd, err, errno);
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client_stop_timer_and_give_back_fd(cs, 1);
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ret = EUCLEAN;
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}
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return ret;
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}
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static int handle_client_readable_event(ussl_sock_t *s)
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{
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int ret = EAGAIN;
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clientfd_sk_t *cs = (clientfd_sk_t *)s;
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char client_addr[IP_STRING_MAX_LEN] = {0};
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get_client_addr(cs->fd, client_addr, IP_STRING_MAX_LEN);
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char auth_type[AUTH_TYPE_STRING_MAX_LEN] = {0};
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auth_type_to_str(cs->fd_info.auth_methods, auth_type, AUTH_TYPE_STRING_MAX_LEN);
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if (SEND_FIRST_NEGO_MESSAGE == cs->fd_info.stage) {
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int64_t rbytes = 0;
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char buf[USSL_BUF_LEN];
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// peek
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while ((rbytes = recv(cs->fd, buf, sizeof(buf), MSG_PEEK)) < 0 && EINTR == errno)
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;
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if (rbytes <= 0) {
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handle_recv_fail(rbytes, cs, &ret);
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} else if (rbytes < sizeof(negotiation_head_t)) {
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ret = 0;
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} else { // get mag len & read msg
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negotiation_head_t msg_head;
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memcpy(&msg_head, buf, sizeof(msg_head));
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if (NEGOTIATION_MAGIC != msg_head.magic) {
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client_stop_timer_and_give_back_fd(cs, 1);
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ret = EUCLEAN;
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} else {
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while ((rbytes = recv(cs->fd, buf, sizeof(msg_head) + msg_head.len, 0)) <= 0 &&
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EINTR == errno)
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;
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if (rbytes <= 0) {
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handle_recv_fail(rbytes, cs, &ret);
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} else {
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negotiation_message_t nego_msg;
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memcpy(&nego_msg, buf + sizeof(msg_head), sizeof(nego_msg));
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if (USSL_AUTH_SSL_HANDSHAKE == nego_msg.type || USSL_AUTH_SSL_IO == nego_msg.type) {
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// do ssl handshake
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if (0 !=
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(ret = fd_enable_ssl_for_client(cs->fd, cs->fd_info.ssl_ctx_id, nego_msg.type))) {
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client_stop_timer_and_give_back_fd(cs, 1);
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ussl_log_error("create SSL failed, fd:%d, errno:%d", s->fd, errno);
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} else {
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ussl_log_info("client do ssl handshake first, fd:%d, addr:%s, auth_method:%s", cs->fd,
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client_addr, auth_type);
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ret = client_do_ssl_handshake(cs);
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if (EAGAIN == ret) {
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cs->fd_info.stage = DOING_SSL_HANSHAKE;
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}
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}
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}
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}
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}
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}
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} else {
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ussl_log_info("client do ssl handshake again, fd:%d, addr:%s, auth_method:%s", cs->fd,
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client_addr, auth_type);
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ret = client_do_ssl_handshake(cs);
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}
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return ret;
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}
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int clientfd_sk_handle_event(clientfd_sk_t *s)
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{
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int ret = EAGAIN;
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if (ussl_skt(s, OUT)) {
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ret = handle_client_writable_event((ussl_sock_t *)s);
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} else if (ussl_skt(s, IN)) {
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ret = handle_client_readable_event((ussl_sock_t *)s);
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}
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return ret;
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}
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static int remove_from_epoll_and_dispatch(acceptfd_sk_t *s, uint64_t gid)
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{
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int err = EUCLEAN;
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remove_from_timeout_list(&s->timeout_link);
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int ret = 0;
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if (0 != (ret = libc_epoll_ctl(s->ep->fd, EPOLL_CTL_DEL, s->fd, NULL))) {
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ussl_log_warn("remove acceptfd from epoll failed, epfd:%d, fd:%d, errno:%d", s->ep->fd, s->fd,
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errno);
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} else if (0 != (ret = dispatch_accept_fd_to_certain_group(s->fd, gid))) {
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ussl_log_warn("dispatch fd to default group failed, fd:%d, ret:%d", s->fd, ret);
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}
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if (0 != ret && s->fd >= 0) {
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close(s->fd);
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}
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s->fd = -1;
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return err;
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}
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void get_src_addr(int fd, char *buf, int len)
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{
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struct sockaddr_storage addr;
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socklen_t sock_len = sizeof(addr);
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if (0 != getpeername(fd, (struct sockaddr *)&addr, &sock_len)) {
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ussl_log_warn("getpeername failed, fd:%d, errno:%d", fd, errno);
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} else {
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char src_addr[INET6_ADDRSTRLEN];
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if (AF_INET == addr.ss_family) {
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struct sockaddr_in *s = (struct sockaddr_in *)&addr;
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if (NULL != inet_ntop(AF_INET, &s->sin_addr, src_addr, INET_ADDRSTRLEN)) {
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if (snprintf(buf, len, "%s:%d", src_addr, ntohs(s->sin_port)) < 0) {
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ussl_log_warn("snprintf failed, errno:%d", errno);
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}
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} else {
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ussl_log_warn("call inet_ntop for AF_INET failed, errno:%d", errno);
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}
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} else {
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struct sockaddr_in6 *s = (struct sockaddr_in6 *)&addr;
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if (NULL != inet_ntop(AF_INET6, &s->sin6_addr, src_addr, INET6_ADDRSTRLEN)) {
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if (snprintf(buf, len, "[%s]:%d", src_addr, ntohs(s->sin6_port)) < 0) {
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ussl_log_warn("snprintf failed, errno:%d", errno);
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}
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} else {
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ussl_log_warn("call inet_ntop for AF_INET6 failed, errno:%d", errno);
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}
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}
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}
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}
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static void handle_acceptfd_error(acceptfd_sk_t *s, int *err)
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{
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remove_from_timeout_list(&s->timeout_link);
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*err = EUCLEAN;
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if (s->fd >= 0) {
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close(s->fd);
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}
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s->fd = -1;
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}
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static int acceptfd_handle_first_readable_event(acceptfd_sk_t *s)
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{
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int err = 0;
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char buf[256];
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ssize_t rbytes = recv(s->fd, buf, sizeof(buf), MSG_PEEK);
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negotiation_head_t *h = (typeof(h))buf;
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char src_addr[IP_STRING_MAX_LEN] = {0};
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get_src_addr(s->fd, src_addr, IP_STRING_MAX_LEN);
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if (0 == rbytes) {
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handle_acceptfd_error(s, &err);
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} else if (rbytes < 0) {
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if (EINTR == errno) {
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} else if (EAGAIN == errno || EWOULDBLOCK == errno) {
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s->mask &= ~EPOLLIN;
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err = EAGAIN;
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} else {
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handle_acceptfd_error(s, &err);
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}
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} else if (rbytes < sizeof(negotiation_head_t)) {
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} else if (h->magic != NEGOTIATION_MAGIC) {
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int need_dispatch = 0;
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if (test_server_auth_methods(USSL_AUTH_NONE)) {
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need_dispatch = 1;
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} else if (is_local_ip_address(src_addr)) {
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ussl_log_info("local ip address:%s, need dispatch", src_addr);
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need_dispatch = 1;
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} else if (h->magic == 0x12345678 || h->magic == 0x78563412) {
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ussl_log_info("easy negotation message, need dispatch, src:%s, fd:%d", src_addr, s->fd);
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need_dispatch = 1;
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}
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if (need_dispatch) {
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ussl_log_info("recv non-negotiation message, the fd will be dispatched, fd:%d, src_addr:%s, magic:0x%x",
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s->fd, src_addr, h->magic);
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err = remove_from_epoll_and_dispatch(s, UINT64_MAX);
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} else {
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char auth_type[AUTH_TYPE_STRING_MAX_LEN] = {0};
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auth_type_to_str(get_server_auth_methods(), auth_type, AUTH_TYPE_STRING_MAX_LEN);
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ussl_log_warn("connection is not allowed, fd:%d, src_addr:%s, server_auth_method:%s, "
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"rbytes:%ld, magic:%x",
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s->fd, src_addr, auth_type, rbytes, h->magic);
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handle_acceptfd_error(s, &err);
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}
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} else if (h->len + sizeof(*h) > rbytes) {
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// need read more
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} else {
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while ((rbytes = recv(s->fd, buf, h->len + sizeof(negotiation_head_t), 0)) < 0 &&
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EINTR == errno)
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;
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if (rbytes != (h->len + sizeof(negotiation_head_t))) {
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ussl_log_warn("consume nego message failed, rbytes:%ld, fd:%d, errno:%d", rbytes, s->fd,
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errno);
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handle_acceptfd_error(s, &err);
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} else {
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if (is_local_ip_address(src_addr)) {
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err = remove_from_epoll_and_dispatch(s, UINT64_MAX);
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ussl_log_info("local ip address:%s, dispatch after consume", src_addr);
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} else {
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negotiation_message_t *nego_message = (typeof(nego_message))(h + 1);
|
|
s->fd_info.client_gid = nego_message->client_gid;
|
|
char auth_type[AUTH_TYPE_STRING_MAX_LEN] = {0};
|
|
auth_type_to_str(nego_message->type, auth_type, AUTH_TYPE_STRING_MAX_LEN);
|
|
if (USSL_AUTH_NONE == nego_message->type) {
|
|
if (test_server_auth_methods(USSL_AUTH_NONE)) {
|
|
ussl_log_info("auth mothod is NONE, the fd will be dispatched, fd:%d, src_addr:%s", s->fd,
|
|
src_addr);
|
|
err = remove_from_epoll_and_dispatch(s, nego_message->client_gid);
|
|
} else {
|
|
ussl_log_warn("ussl server not support mode:%s, fd:%d", auth_type, s->fd);
|
|
handle_acceptfd_error(s, &err);
|
|
}
|
|
} else if (USSL_AUTH_SSL_IO == nego_message->type ||
|
|
USSL_AUTH_SSL_HANDSHAKE == nego_message->type) {
|
|
if (test_server_auth_methods(USSL_AUTH_SSL_IO) ||
|
|
test_server_auth_methods(USSL_AUTH_SSL_HANDSHAKE)) {
|
|
if (-1 == ssl_config_ctx_id) {
|
|
ussl_log_error("ssl config not configured!");
|
|
handle_acceptfd_error(s, &err);
|
|
} else {
|
|
negotiation_message_t nego_message_ack;
|
|
nego_message_ack.type = nego_message->type;
|
|
if (0 != fd_enable_ssl_for_server(s->fd, ssl_config_ctx_id, nego_message->type)) {
|
|
ussl_log_error("fd_enable_ssl_for_server failed, fd:%d", s->fd);
|
|
handle_acceptfd_error(s, &err);
|
|
} else if (0 != send_negotiation_message(s->fd, (char *)&nego_message_ack,
|
|
sizeof(nego_message_ack))) {
|
|
ussl_log_warn("send_negotiation_message failed, auth-mode:%d, fd:%d",
|
|
nego_message->type, s->fd);
|
|
handle_acceptfd_error(s, &err);
|
|
} else {
|
|
ussl_log_info("auth method is SSL_NO_ENCRYPT or SSL_IO, and the negotiation message "
|
|
"has be sent, fd:%d, src_addr:%s",
|
|
s->fd, src_addr);
|
|
s->fd_info.stage = SERVER_ACK_NEGO_AND_SSL;
|
|
err = EAGAIN;
|
|
}
|
|
}
|
|
} else {
|
|
ussl_log_warn("ussl server not support mode:%s, fd:%d", auth_type, s->fd);
|
|
handle_acceptfd_error(s, &err);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int acceptfd_handle_ssl_event(acceptfd_sk_t *s)
|
|
{
|
|
int ret = 0;
|
|
char src_addr[IP_STRING_MAX_LEN] = {0};
|
|
get_src_addr(s->fd, src_addr, IP_STRING_MAX_LEN);
|
|
ret = ssl_do_handshake(s->fd);
|
|
if (0 == ret) {
|
|
ussl_log_info("ssl_do_handshake succ, fd:%d, client_gid:%lu, src_addr:%s", s->fd, s->fd_info.client_gid, src_addr);
|
|
remove_from_epoll_and_dispatch(s, s->fd_info.client_gid);
|
|
ret = EUCLEAN;
|
|
} else if (EAGAIN == ret) {
|
|
} else {
|
|
ussl_log_warn("ssl_do_handshake failed, fd:%d, ret:%d, src_addr:%s", s->fd, ret, src_addr);
|
|
remove_from_timeout_list(&s->timeout_link);
|
|
if (s->fd >= 0) {
|
|
close(s->fd);
|
|
}
|
|
s->fd = -1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int acceptfd_sk_handle_event(acceptfd_sk_t *s)
|
|
{
|
|
int ret = 0;
|
|
if (ussl_skt(s, IN)) {
|
|
if (SERVER_ACCEPT_CONNECTION == s->fd_info.stage) {
|
|
ret = acceptfd_handle_first_readable_event(s);
|
|
} else if (SERVER_ACK_NEGO_AND_SSL == s->fd_info.stage) {
|
|
ret = acceptfd_handle_ssl_event(s);
|
|
}
|
|
}
|
|
return ret;
|
|
} |