diff options
Diffstat (limited to 'common/smtppass.c')
| -rw-r--r-- | common/smtppass.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/common/smtppass.c b/common/smtppass.c index dc1cf77..8b71f4d 100644 --- a/common/smtppass.c +++ b/common/smtppass.c @@ -78,7 +78,7 @@ typedef struct spthread spthread_t; /* ----------------------------------------------------------------------- - * STRINGS + * DATA */ #define CRLF "\r\n" @@ -93,6 +93,7 @@ spthread_t; #define SMTP_REJPREFIX "550 Content Rejected; " #define SMTP_DATA "DATA" CRLF +#define SMTP_NOOP "NOOP" CRLF #define SMTP_BANNER "220 smtp.passthru" CRLF #define SMTP_HELO_RSP "250 smtp.passthru" CRLF #define SMTP_EHLO_RSP "250-smtp.passthru" CRLF @@ -126,6 +127,9 @@ spthread_t; #define LINE_TOO_LONG(l) ((l) >= (SP_LINE_LENGTH - 2)) +/* The amount interval at which to send NOOPS to server */ +#define INTERACTION_DELTA 10 + /* ----------------------------------------------------------------------- * CONFIGURATION OPTIONS * @@ -179,6 +183,7 @@ static int read_server_response(spctx_t* ctx); static int parse_config_file(const char* configfile); static char* parse_address(char* line); static const char* get_successful_rsp(const char* line, int* cont); +static void do_server_noop(spctx_t* ctx); /* Used externally in some cases */ int sp_parse_option(const char* name, const char* option); @@ -1123,6 +1128,14 @@ int sp_read_data(spctx_t* ctx, const char** data) return -1; }; + /* + * During this time we're just reading from the client. If we haven't + * had any interaction with the server recently then send something + * to let it know we're still around. + */ + if((ctx->server.last_action + INTERACTION_DELTA) < time(NULL)) + do_server_noop(ctx); + if(ctx->_crlf && strcmp(ctx->client.line, DATA_END_SIG) == 0) return 0; @@ -1373,6 +1386,12 @@ static int read_server_response(spctx_t* ctx) return 0; } +static void do_server_noop(spctx_t* ctx) +{ + if(spio_write_data(ctx, &(ctx->server), SMTP_NOOP) != -1) + spio_read_line(ctx, &(ctx->server), SPIO_DISCARD); +} + void sp_setup_forked(spctx_t* ctx, int file) { /* Signals we've messed with */ |