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deal with too small/long requests

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This commit is contained in:
prx 2021-02-25 18:37:48 +01:00
parent 458592594e
commit efa1f639fc
1 changed files with 15 additions and 6 deletions
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21
main.c
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@ -20,7 +20,7 @@
#include "utils.h"
#define GEMINI_PART 9
#define GEMINI_REQUEST_MAX 1024 /* see https://gemini.circumlunar.space/docs/specification.html */
#define GEMINI_REQUEST_MAX 1024 /* https://gemini.circumlunar.space/docs/specification.html */
@ -358,19 +358,27 @@ main(int argc, char **argv)
*/
drop_privileges(user, chroot_dir);
size_t reqlen = 0;
/*
* read 1024 chars from stdin
* to get the request
*/
if (fgets(request, GEMINI_REQUEST_MAX, stdin) == NULL) {
status(59, "request is too long (1024 max)");
errlog("request is too long (1024 max): %s", request);
reqlen = fread(request, 1, GEMINI_REQUEST_MAX, stdin);
/* now should end of file, or request is too long */
if (feof(stdin) == 0) {
status(59, "request too long");
errlog("request too long");
}
/* remove \r\n at the end of string */
pos = strchr(request, '\r');
if (pos != NULL)
pos = strstr(request, "\r\n");
if (pos != NULL) {
*pos = '\0';
} else {
status(59, "malformed request, must end with \r\n");
errlog("malformed request, must end with \r\n");
}
/*
* check if the beginning of the request starts with
@ -378,6 +386,7 @@ main(int argc, char **argv)
*/
if (strncmp(request, "gemini://", GEMINI_PART) != 0) {
/* error code url malformed */
status(59, "request malformed : must start with gemini://");
errlog("request «%s» doesn't match gemini://",
request);
}