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limit email size #247

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Merged
theyoyojo merged 1 commit into from
Mar 17, 2025
Merged

limit email size #247

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7 changes: 6 additions & 1 deletion smtp/smtp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,11 @@
#define HOSTNAME
#endif

//default to 64k limit for incoming mail. Override with `-DEMAIL_SIZE_LIMIT=whatever` if desired
#ifndef EMAIL_SIZE_LIMIT
#define EMAIL_SIZE_LIMIT 65536
#endif

#define UPPERCASE_LETTERS(MACRO) \
MACRO('A') \
MACRO('B') \
Expand Down Expand Up @@ -686,7 +691,7 @@ static void handle_data(enum state *state)
#define ERROR_NES(...) { warnx(__VA_ARGS__); error = NOT_ENOUGH_SPACE; last_state = dstate = BODY; break; }
#define ERROR_USI(...) { warnx(__VA_ARGS__); error = USER_SYNTAX_ISSUE; last_state = dstate = BODY; break; }
#define ERROR_ISE(...) { warnx(__VA_ARGS__); error = INTERNAL_SERVER_ERROR; last_state = dstate = BODY; break; }
#define CHECK_WRITE_FAIL(VARNAME) { if(0 > VARNAME) ERROR_NES("not enough space %d", __LINE__) else curr_size += (off_t)VARNAME; }
#define CHECK_WRITE_FAIL(VARNAME) { if(curr_size > EMAIL_SIZE_LIMIT || 0 > VARNAME) ERROR_NES("not enough space %d", __LINE__) else curr_size += (off_t)VARNAME; }
for(enum data_state dstate = HEADERS, last_state = HEADERS; dstate != FINISHED;)
{
if(dstate == BODY && last_state == HEADERS)
Expand Down