| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| #include <ngx_mail.h> |
| #include <ngx_mail_smtp_module.h> |
| |
| |
| static void ngx_mail_smtp_resolve_addr_handler(ngx_resolver_ctx_t *ctx); |
| static void ngx_mail_smtp_resolve_name(ngx_event_t *rev); |
| static void ngx_mail_smtp_resolve_name_handler(ngx_resolver_ctx_t *ctx); |
| static void ngx_mail_smtp_greeting(ngx_mail_session_t *s, ngx_connection_t *c); |
| static void ngx_mail_smtp_invalid_pipelining(ngx_event_t *rev); |
| static ngx_int_t ngx_mail_smtp_create_buffer(ngx_mail_session_t *s, |
| ngx_connection_t *c); |
| |
| static ngx_int_t ngx_mail_smtp_helo(ngx_mail_session_t *s, ngx_connection_t *c); |
| static ngx_int_t ngx_mail_smtp_auth(ngx_mail_session_t *s, ngx_connection_t *c); |
| static ngx_int_t ngx_mail_smtp_mail(ngx_mail_session_t *s, ngx_connection_t *c); |
| static ngx_int_t ngx_mail_smtp_starttls(ngx_mail_session_t *s, |
| ngx_connection_t *c); |
| static ngx_int_t ngx_mail_smtp_rset(ngx_mail_session_t *s, ngx_connection_t *c); |
| static ngx_int_t ngx_mail_smtp_rcpt(ngx_mail_session_t *s, ngx_connection_t *c); |
| |
| static ngx_int_t ngx_mail_smtp_discard_command(ngx_mail_session_t *s, |
| ngx_connection_t *c, char *err); |
| static void ngx_mail_smtp_log_rejected_command(ngx_mail_session_t *s, |
| ngx_connection_t *c, char *err); |
| |
| |
| static u_char smtp_ok[] = "250 2.0.0 OK" CRLF; |
| static u_char smtp_bye[] = "221 2.0.0 Bye" CRLF; |
| static u_char smtp_starttls[] = "220 2.0.0 Start TLS" CRLF; |
| static u_char smtp_next[] = "334 " CRLF; |
| static u_char smtp_username[] = "334 VXNlcm5hbWU6" CRLF; |
| static u_char smtp_password[] = "334 UGFzc3dvcmQ6" CRLF; |
| static u_char smtp_invalid_command[] = "500 5.5.1 Invalid command" CRLF; |
| static u_char smtp_invalid_pipelining[] = |
| "503 5.5.0 Improper use of SMTP command pipelining" CRLF; |
| static u_char smtp_invalid_argument[] = "501 5.5.4 Invalid argument" CRLF; |
| static u_char smtp_auth_required[] = "530 5.7.1 Authentication required" CRLF; |
| static u_char smtp_bad_sequence[] = "503 5.5.1 Bad sequence of commands" CRLF; |
| |
| |
| static ngx_str_t smtp_unavailable = ngx_string("[UNAVAILABLE]"); |
| static ngx_str_t smtp_tempunavail = ngx_string("[TEMPUNAVAIL]"); |
| |
| |
| void |
| ngx_mail_smtp_init_session(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_resolver_ctx_t *ctx; |
| ngx_mail_core_srv_conf_t *cscf; |
| |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
| |
| if (cscf->resolver == NULL) { |
| s->host = smtp_unavailable; |
| ngx_mail_smtp_greeting(s, c); |
| return; |
| } |
| |
| #if (NGX_HAVE_UNIX_DOMAIN) |
| if (c->sockaddr->sa_family == AF_UNIX) { |
| s->host = smtp_tempunavail; |
| ngx_mail_smtp_greeting(s, c); |
| return; |
| } |
| #endif |
| |
| c->log->action = "in resolving client address"; |
| |
| ctx = ngx_resolve_start(cscf->resolver, NULL); |
| if (ctx == NULL) { |
| ngx_mail_close_connection(c); |
| return; |
| } |
| |
| ctx->addr.sockaddr = c->sockaddr; |
| ctx->addr.socklen = c->socklen; |
| ctx->handler = ngx_mail_smtp_resolve_addr_handler; |
| ctx->data = s; |
| ctx->timeout = cscf->resolver_timeout; |
| |
| if (ngx_resolve_addr(ctx) != NGX_OK) { |
| ngx_mail_close_connection(c); |
| } |
| } |
| |
| |
| static void |
| ngx_mail_smtp_resolve_addr_handler(ngx_resolver_ctx_t *ctx) |
| { |
| ngx_connection_t *c; |
| ngx_mail_session_t *s; |
| |
| s = ctx->data; |
| c = s->connection; |
| |
| if (ctx->state) { |
| ngx_log_error(NGX_LOG_ERR, c->log, 0, |
| "%V could not be resolved (%i: %s)", |
| &c->addr_text, ctx->state, |
| ngx_resolver_strerror(ctx->state)); |
| |
| if (ctx->state == NGX_RESOLVE_NXDOMAIN) { |
| s->host = smtp_unavailable; |
| |
| } else { |
| s->host = smtp_tempunavail; |
| } |
| |
| ngx_resolve_addr_done(ctx); |
| |
| ngx_mail_smtp_greeting(s, s->connection); |
| |
| return; |
| } |
| |
| c->log->action = "in resolving client hostname"; |
| |
| s->host.data = ngx_pstrdup(c->pool, &ctx->name); |
| if (s->host.data == NULL) { |
| ngx_resolve_addr_done(ctx); |
| ngx_mail_close_connection(c); |
| return; |
| } |
| |
| s->host.len = ctx->name.len; |
| |
| ngx_resolve_addr_done(ctx); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
| "address resolved: %V", &s->host); |
| |
| c->read->handler = ngx_mail_smtp_resolve_name; |
| |
| ngx_post_event(c->read, &ngx_posted_events); |
| } |
| |
| |
| static void |
| ngx_mail_smtp_resolve_name(ngx_event_t *rev) |
| { |
| ngx_connection_t *c; |
| ngx_mail_session_t *s; |
| ngx_resolver_ctx_t *ctx; |
| ngx_mail_core_srv_conf_t *cscf; |
| |
| c = rev->data; |
| s = c->data; |
| |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
| |
| ctx = ngx_resolve_start(cscf->resolver, NULL); |
| if (ctx == NULL) { |
| ngx_mail_close_connection(c); |
| return; |
| } |
| |
| ctx->name = s->host; |
| ctx->handler = ngx_mail_smtp_resolve_name_handler; |
| ctx->data = s; |
| ctx->timeout = cscf->resolver_timeout; |
| |
| if (ngx_resolve_name(ctx) != NGX_OK) { |
| ngx_mail_close_connection(c); |
| } |
| } |
| |
| |
| static void |
| ngx_mail_smtp_resolve_name_handler(ngx_resolver_ctx_t *ctx) |
| { |
| ngx_uint_t i; |
| ngx_connection_t *c; |
| ngx_mail_session_t *s; |
| |
| s = ctx->data; |
| c = s->connection; |
| |
| if (ctx->state) { |
| ngx_log_error(NGX_LOG_ERR, c->log, 0, |
| "\"%V\" could not be resolved (%i: %s)", |
| &ctx->name, ctx->state, |
| ngx_resolver_strerror(ctx->state)); |
| |
| if (ctx->state == NGX_RESOLVE_NXDOMAIN) { |
| s->host = smtp_unavailable; |
| |
| } else { |
| s->host = smtp_tempunavail; |
| } |
| |
| } else { |
| |
| #if (NGX_DEBUG) |
| { |
| u_char text[NGX_SOCKADDR_STRLEN]; |
| ngx_str_t addr; |
| |
| addr.data = text; |
| |
| for (i = 0; i < ctx->naddrs; i++) { |
| addr.len = ngx_sock_ntop(ctx->addrs[i].sockaddr, |
| ctx->addrs[i].socklen, |
| text, NGX_SOCKADDR_STRLEN, 0); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
| "name was resolved to %V", &addr); |
| } |
| } |
| #endif |
| |
| for (i = 0; i < ctx->naddrs; i++) { |
| if (ngx_cmp_sockaddr(ctx->addrs[i].sockaddr, ctx->addrs[i].socklen, |
| c->sockaddr, c->socklen, 0) |
| == NGX_OK) |
| { |
| goto found; |
| } |
| } |
| |
| s->host = smtp_unavailable; |
| } |
| |
| found: |
| |
| ngx_resolve_name_done(ctx); |
| |
| ngx_mail_smtp_greeting(s, c); |
| } |
| |
| |
| static void |
| ngx_mail_smtp_greeting(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_msec_t timeout; |
| ngx_mail_core_srv_conf_t *cscf; |
| ngx_mail_smtp_srv_conf_t *sscf; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
| "smtp greeting for \"%V\"", &s->host); |
| |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
| sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module); |
| |
| timeout = sscf->greeting_delay ? sscf->greeting_delay : cscf->timeout; |
| ngx_add_timer(c->read, timeout); |
| |
| if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
| ngx_mail_close_connection(c); |
| } |
| |
| if (sscf->greeting_delay) { |
| c->read->handler = ngx_mail_smtp_invalid_pipelining; |
| return; |
| } |
| |
| c->read->handler = ngx_mail_smtp_init_protocol; |
| |
| s->out = sscf->greeting; |
| |
| ngx_mail_send(c->write); |
| } |
| |
| |
| static void |
| ngx_mail_smtp_invalid_pipelining(ngx_event_t *rev) |
| { |
| ngx_connection_t *c; |
| ngx_mail_session_t *s; |
| ngx_mail_core_srv_conf_t *cscf; |
| ngx_mail_smtp_srv_conf_t *sscf; |
| |
| c = rev->data; |
| s = c->data; |
| |
| c->log->action = "in delay pipelining state"; |
| |
| if (rev->timedout) { |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "delay greeting"); |
| |
| rev->timedout = 0; |
| |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
| |
| c->read->handler = ngx_mail_smtp_init_protocol; |
| |
| ngx_add_timer(c->read, cscf->timeout); |
| |
| if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
| ngx_mail_close_connection(c); |
| return; |
| } |
| |
| sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module); |
| |
| s->out = sscf->greeting; |
| |
| } else { |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "invalid pipelining"); |
| |
| if (s->buffer == NULL) { |
| if (ngx_mail_smtp_create_buffer(s, c) != NGX_OK) { |
| return; |
| } |
| } |
| |
| if (ngx_mail_smtp_discard_command(s, c, |
| "client was rejected before greeting: \"%V\"") |
| != NGX_OK) |
| { |
| return; |
| } |
| |
| ngx_str_set(&s->out, smtp_invalid_pipelining); |
| s->quit = 1; |
| } |
| |
| ngx_mail_send(c->write); |
| } |
| |
| |
| void |
| ngx_mail_smtp_init_protocol(ngx_event_t *rev) |
| { |
| ngx_connection_t *c; |
| ngx_mail_session_t *s; |
| |
| c = rev->data; |
| |
| c->log->action = "in auth state"; |
| |
| if (rev->timedout) { |
| ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
| c->timedout = 1; |
| ngx_mail_close_connection(c); |
| return; |
| } |
| |
| s = c->data; |
| |
| if (s->buffer == NULL) { |
| if (ngx_mail_smtp_create_buffer(s, c) != NGX_OK) { |
| return; |
| } |
| } |
| |
| s->mail_state = ngx_smtp_start; |
| c->read->handler = ngx_mail_smtp_auth_state; |
| |
| ngx_mail_smtp_auth_state(rev); |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_create_buffer(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_mail_smtp_srv_conf_t *sscf; |
| |
| if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) == NGX_ERROR) { |
| ngx_mail_session_internal_server_error(s); |
| return NGX_ERROR; |
| } |
| |
| sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module); |
| |
| s->buffer = ngx_create_temp_buf(c->pool, sscf->client_buffer_size); |
| if (s->buffer == NULL) { |
| ngx_mail_session_internal_server_error(s); |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| void |
| ngx_mail_smtp_auth_state(ngx_event_t *rev) |
| { |
| ngx_int_t rc; |
| ngx_connection_t *c; |
| ngx_mail_session_t *s; |
| |
| c = rev->data; |
| s = c->data; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp auth state"); |
| |
| if (rev->timedout) { |
| ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); |
| c->timedout = 1; |
| ngx_mail_close_connection(c); |
| return; |
| } |
| |
| if (s->out.len) { |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp send handler busy"); |
| s->blocked = 1; |
| return; |
| } |
| |
| s->blocked = 0; |
| |
| rc = ngx_mail_read_command(s, c); |
| |
| if (rc == NGX_AGAIN || rc == NGX_ERROR) { |
| return; |
| } |
| |
| ngx_str_set(&s->out, smtp_ok); |
| |
| if (rc == NGX_OK) { |
| switch (s->mail_state) { |
| |
| case ngx_smtp_start: |
| |
| switch (s->command) { |
| |
| case NGX_SMTP_HELO: |
| case NGX_SMTP_EHLO: |
| rc = ngx_mail_smtp_helo(s, c); |
| break; |
| |
| case NGX_SMTP_AUTH: |
| rc = ngx_mail_smtp_auth(s, c); |
| break; |
| |
| case NGX_SMTP_QUIT: |
| s->quit = 1; |
| ngx_str_set(&s->out, smtp_bye); |
| break; |
| |
| case NGX_SMTP_MAIL: |
| rc = ngx_mail_smtp_mail(s, c); |
| break; |
| |
| case NGX_SMTP_RCPT: |
| rc = ngx_mail_smtp_rcpt(s, c); |
| break; |
| |
| case NGX_SMTP_RSET: |
| rc = ngx_mail_smtp_rset(s, c); |
| break; |
| |
| case NGX_SMTP_NOOP: |
| break; |
| |
| case NGX_SMTP_STARTTLS: |
| rc = ngx_mail_smtp_starttls(s, c); |
| ngx_str_set(&s->out, smtp_starttls); |
| break; |
| |
| default: |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; |
| break; |
| } |
| |
| break; |
| |
| case ngx_smtp_auth_login_username: |
| rc = ngx_mail_auth_login_username(s, c, 0); |
| |
| ngx_str_set(&s->out, smtp_password); |
| s->mail_state = ngx_smtp_auth_login_password; |
| break; |
| |
| case ngx_smtp_auth_login_password: |
| rc = ngx_mail_auth_login_password(s, c); |
| break; |
| |
| case ngx_smtp_auth_plain: |
| rc = ngx_mail_auth_plain(s, c, 0); |
| break; |
| |
| case ngx_smtp_auth_cram_md5: |
| rc = ngx_mail_auth_cram_md5(s, c); |
| break; |
| } |
| } |
| |
| if (s->buffer->pos < s->buffer->last) { |
| s->blocked = 1; |
| } |
| |
| switch (rc) { |
| |
| case NGX_DONE: |
| ngx_mail_auth(s, c); |
| return; |
| |
| case NGX_ERROR: |
| ngx_mail_session_internal_server_error(s); |
| return; |
| |
| case NGX_MAIL_PARSE_INVALID_COMMAND: |
| s->mail_state = ngx_smtp_start; |
| s->state = 0; |
| ngx_str_set(&s->out, smtp_invalid_command); |
| |
| /* fall through */ |
| |
| case NGX_OK: |
| s->args.nelts = 0; |
| |
| if (s->buffer->pos == s->buffer->last) { |
| s->buffer->pos = s->buffer->start; |
| s->buffer->last = s->buffer->start; |
| } |
| |
| if (s->state) { |
| s->arg_start = s->buffer->pos; |
| } |
| |
| ngx_mail_send(c->write); |
| } |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_helo(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_str_t *arg; |
| ngx_mail_smtp_srv_conf_t *sscf; |
| |
| if (s->args.nelts != 1) { |
| ngx_str_set(&s->out, smtp_invalid_argument); |
| s->state = 0; |
| return NGX_OK; |
| } |
| |
| arg = s->args.elts; |
| |
| s->smtp_helo.len = arg[0].len; |
| |
| s->smtp_helo.data = ngx_pnalloc(c->pool, arg[0].len); |
| if (s->smtp_helo.data == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memcpy(s->smtp_helo.data, arg[0].data, arg[0].len); |
| |
| ngx_str_null(&s->smtp_from); |
| ngx_str_null(&s->smtp_to); |
| |
| sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module); |
| |
| if (s->command == NGX_SMTP_HELO) { |
| s->out = sscf->server_name; |
| |
| } else { |
| s->esmtp = 1; |
| |
| #if (NGX_MAIL_SSL) |
| |
| if (c->ssl == NULL) { |
| ngx_mail_ssl_conf_t *sslcf; |
| |
| sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
| |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { |
| s->out = sscf->starttls_capability; |
| return NGX_OK; |
| } |
| |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
| s->out = sscf->starttls_only_capability; |
| return NGX_OK; |
| } |
| } |
| #endif |
| |
| s->out = sscf->capability; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_int_t rc; |
| ngx_mail_core_srv_conf_t *cscf; |
| ngx_mail_smtp_srv_conf_t *sscf; |
| |
| #if (NGX_MAIL_SSL) |
| if (ngx_mail_starttls_only(s, c)) { |
| return NGX_MAIL_PARSE_INVALID_COMMAND; |
| } |
| #endif |
| |
| if (s->args.nelts == 0) { |
| ngx_str_set(&s->out, smtp_invalid_argument); |
| s->state = 0; |
| return NGX_OK; |
| } |
| |
| rc = ngx_mail_auth_parse(s, c); |
| |
| switch (rc) { |
| |
| case NGX_MAIL_AUTH_LOGIN: |
| |
| ngx_str_set(&s->out, smtp_username); |
| s->mail_state = ngx_smtp_auth_login_username; |
| |
| return NGX_OK; |
| |
| case NGX_MAIL_AUTH_LOGIN_USERNAME: |
| |
| ngx_str_set(&s->out, smtp_password); |
| s->mail_state = ngx_smtp_auth_login_password; |
| |
| return ngx_mail_auth_login_username(s, c, 1); |
| |
| case NGX_MAIL_AUTH_PLAIN: |
| |
| ngx_str_set(&s->out, smtp_next); |
| s->mail_state = ngx_smtp_auth_plain; |
| |
| return NGX_OK; |
| |
| case NGX_MAIL_AUTH_CRAM_MD5: |
| |
| sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module); |
| |
| if (!(sscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { |
| return NGX_MAIL_PARSE_INVALID_COMMAND; |
| } |
| |
| if (s->salt.data == NULL) { |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
| |
| if (ngx_mail_salt(s, c, cscf) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| } |
| |
| if (ngx_mail_auth_cram_md5_salt(s, c, "334 ", 4) == NGX_OK) { |
| s->mail_state = ngx_smtp_auth_cram_md5; |
| return NGX_OK; |
| } |
| |
| return NGX_ERROR; |
| } |
| |
| return rc; |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_mail(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_str_t *arg, cmd; |
| ngx_mail_smtp_srv_conf_t *sscf; |
| |
| sscf = ngx_mail_get_module_srv_conf(s, ngx_mail_smtp_module); |
| |
| if (!(sscf->auth_methods & NGX_MAIL_AUTH_NONE_ENABLED)) { |
| ngx_mail_smtp_log_rejected_command(s, c, "client was rejected: \"%V\""); |
| ngx_str_set(&s->out, smtp_auth_required); |
| return NGX_OK; |
| } |
| |
| /* auth none */ |
| |
| if (s->smtp_from.len) { |
| ngx_str_set(&s->out, smtp_bad_sequence); |
| return NGX_OK; |
| } |
| |
| if (s->args.nelts == 0) { |
| ngx_str_set(&s->out, smtp_invalid_argument); |
| return NGX_OK; |
| } |
| |
| arg = s->args.elts; |
| arg += s->args.nelts - 1; |
| |
| cmd.len = arg->data + arg->len - s->cmd.data; |
| cmd.data = s->cmd.data; |
| |
| s->smtp_from.len = cmd.len; |
| |
| s->smtp_from.data = ngx_pnalloc(c->pool, cmd.len); |
| if (s->smtp_from.data == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memcpy(s->smtp_from.data, cmd.data, cmd.len); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
| "smtp mail from:\"%V\"", &s->smtp_from); |
| |
| ngx_str_set(&s->out, smtp_ok); |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_rcpt(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_str_t *arg, cmd; |
| |
| if (s->smtp_from.len == 0) { |
| ngx_str_set(&s->out, smtp_bad_sequence); |
| return NGX_OK; |
| } |
| |
| if (s->args.nelts == 0) { |
| ngx_str_set(&s->out, smtp_invalid_argument); |
| return NGX_OK; |
| } |
| |
| arg = s->args.elts; |
| arg += s->args.nelts - 1; |
| |
| cmd.len = arg->data + arg->len - s->cmd.data; |
| cmd.data = s->cmd.data; |
| |
| s->smtp_to.len = cmd.len; |
| |
| s->smtp_to.data = ngx_pnalloc(c->pool, cmd.len); |
| if (s->smtp_to.data == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memcpy(s->smtp_to.data, cmd.data, cmd.len); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, |
| "smtp rcpt to:\"%V\"", &s->smtp_to); |
| |
| s->auth_method = NGX_MAIL_AUTH_NONE; |
| |
| return NGX_DONE; |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_rset(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| ngx_str_null(&s->smtp_from); |
| ngx_str_null(&s->smtp_to); |
| ngx_str_set(&s->out, smtp_ok); |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_starttls(ngx_mail_session_t *s, ngx_connection_t *c) |
| { |
| #if (NGX_MAIL_SSL) |
| ngx_mail_ssl_conf_t *sslcf; |
| |
| if (c->ssl == NULL) { |
| sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
| if (sslcf->starttls) { |
| |
| /* |
| * RFC3207 requires us to discard any knowledge |
| * obtained from client before STARTTLS. |
| */ |
| |
| ngx_str_null(&s->smtp_helo); |
| ngx_str_null(&s->smtp_from); |
| ngx_str_null(&s->smtp_to); |
| |
| s->buffer->pos = s->buffer->start; |
| s->buffer->last = s->buffer->start; |
| |
| c->read->handler = ngx_mail_starttls_handler; |
| return NGX_OK; |
| } |
| } |
| |
| #endif |
| |
| return NGX_MAIL_PARSE_INVALID_COMMAND; |
| } |
| |
| |
| static ngx_int_t |
| ngx_mail_smtp_discard_command(ngx_mail_session_t *s, ngx_connection_t *c, |
| char *err) |
| { |
| ssize_t n; |
| |
| n = c->recv(c, s->buffer->last, s->buffer->end - s->buffer->last); |
| |
| if (n == NGX_ERROR || n == 0) { |
| ngx_mail_close_connection(c); |
| return NGX_ERROR; |
| } |
| |
| if (n > 0) { |
| s->buffer->last += n; |
| } |
| |
| if (n == NGX_AGAIN) { |
| if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
| ngx_mail_session_internal_server_error(s); |
| return NGX_ERROR; |
| } |
| |
| return NGX_AGAIN; |
| } |
| |
| ngx_mail_smtp_log_rejected_command(s, c, err); |
| |
| s->buffer->pos = s->buffer->start; |
| s->buffer->last = s->buffer->start; |
| |
| return NGX_OK; |
| } |
| |
| |
| static void |
| ngx_mail_smtp_log_rejected_command(ngx_mail_session_t *s, ngx_connection_t *c, |
| char *err) |
| { |
| u_char ch; |
| ngx_str_t cmd; |
| ngx_uint_t i; |
| |
| if (c->log->log_level < NGX_LOG_INFO) { |
| return; |
| } |
| |
| cmd.len = s->buffer->last - s->buffer->start; |
| cmd.data = s->buffer->start; |
| |
| for (i = 0; i < cmd.len; i++) { |
| ch = cmd.data[i]; |
| |
| if (ch != CR && ch != LF) { |
| continue; |
| } |
| |
| cmd.data[i] = '_'; |
| } |
| |
| cmd.len = i; |
| |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, err, &cmd); |
| } |