Mercurial > hg > nginx
changeset 7838:815c63581be4
Mail: POP3 pipelining support.
The change is mostly the same as the SMTP one (04e43d03e153 and 3f5d0af4e40a),
and ensures that nginx is able to properly handle or reject multiple POP3
commands, as required by the PIPELINING capability (RFC 2449). The s->cmd
field is not really used and set for consistency.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Wed, 19 May 2021 03:13:18 +0300 |
| parents | ba8a8299b904 |
| children | 3974f4e56a4e |
| files | src/mail/ngx_mail_parse.c src/mail/ngx_mail_pop3_handler.c src/mail/ngx_mail_proxy_module.c |
| diffstat | 3 files changed, 45 insertions(+), 6 deletions(-) [+] |
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line diff
--- a/src/mail/ngx_mail_parse.c +++ b/src/mail/ngx_mail_parse.c @@ -21,6 +21,8 @@ ngx_mail_pop3_parse_command(ngx_mail_ses ngx_str_t *arg; enum { sw_start = 0, + sw_command, + sw_invalid, sw_spaces_before_argument, sw_argument, sw_almost_done @@ -35,8 +37,14 @@ ngx_mail_pop3_parse_command(ngx_mail_ses /* POP3 command */ case sw_start: + s->cmd_start = p; + state = sw_command; + + /* fall through */ + + case sw_command: if (ch == ' ' || ch == CR || ch == LF) { - c = s->buffer->start; + c = s->cmd_start; if (p - c == 4) { @@ -85,6 +93,9 @@ ngx_mail_pop3_parse_command(ngx_mail_ses goto invalid; } + s->cmd.data = s->cmd_start; + s->cmd.len = p - s->cmd_start; + switch (ch) { case ' ': state = sw_spaces_before_argument; @@ -104,6 +115,9 @@ ngx_mail_pop3_parse_command(ngx_mail_ses break; + case sw_invalid: + goto invalid; + case sw_spaces_before_argument: switch (ch) { case ' ': @@ -205,10 +219,22 @@ done: invalid: - s->state = sw_start; + s->state = sw_invalid; s->arg_start = NULL; - return NGX_MAIL_PARSE_INVALID_COMMAND; + /* skip invalid command till LF */ + + for ( /* void */ ; p < s->buffer->last; p++) { + if (*p == LF) { + s->state = sw_start; + s->buffer->pos = p + 1; + return NGX_MAIL_PARSE_INVALID_COMMAND; + } + } + + s->buffer->pos = p; + + return NGX_AGAIN; }
--- a/src/mail/ngx_mail_pop3_handler.c +++ b/src/mail/ngx_mail_pop3_handler.c @@ -262,6 +262,10 @@ ngx_mail_pop3_auth_state(ngx_event_t *re } } + if (s->buffer->pos < s->buffer->last) { + s->blocked = 1; + } + switch (rc) { case NGX_DONE: @@ -283,11 +287,14 @@ ngx_mail_pop3_auth_state(ngx_event_t *re case NGX_OK: s->args.nelts = 0; - s->buffer->pos = s->buffer->start; - s->buffer->last = s->buffer->start; + + 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->start; + s->arg_start = s->buffer->pos; } if (ngx_handle_read_event(c->read, 0) != NGX_OK) { @@ -400,6 +407,8 @@ ngx_mail_pop3_stls(ngx_mail_session_t *s if (c->ssl == NULL) { sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); if (sslcf->starttls) { + s->buffer->pos = s->buffer->start; + s->buffer->last = s->buffer->start; c->read->handler = ngx_mail_starttls_handler; return NGX_OK; }
--- a/src/mail/ngx_mail_proxy_module.c +++ b/src/mail/ngx_mail_proxy_module.c @@ -327,6 +327,10 @@ ngx_mail_proxy_pop3_handler(ngx_event_t c->log->action = NULL; ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in"); + if (s->buffer->pos < s->buffer->last) { + ngx_post_event(c->write, &ngx_posted_events); + } + ngx_mail_proxy_handler(s->connection->write); return;