--- /dev/null
+#include <ccan/foreach/foreach.h>
+#include <ccan/failtest/failtest_override.h>
+#include <ccan/failtest/failtest.h>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define CCAN_RFC822_DEBUG
+
+#include <ccan/rfc822/rfc822.h>
+
+#include <ccan/rfc822/rfc822.c>
+
+#include "testdata.h"
+#include "helper.h"
+
+#define NAME_TEMPLATE "X-Bad-Header"
+#define NAME_TEMPLATE_LEN (strlen(NAME_TEMPLATE))
+
+const char bad_name_template[] =
+ NAME_TEMPLATE ": This is a good header that will become bad\n";
+
+static bool bad_name(const char *buf, char c)
+{
+ struct rfc822_msg *msg;
+ struct rfc822_header *hdr;
+ enum rfc822_header_errors errs;
+ struct bytestring hname;
+
+ msg = rfc822_start(NULL, buf, strlen(buf));
+
+ allocation_failure_check();
+
+ hdr = rfc822_first_header(msg);
+ ok1(hdr);
+
+ allocation_failure_check();
+
+ errs = rfc822_header_errors(msg, hdr);
+
+ allocation_failure_check();
+
+ ok1(!(errs & ~RFC822_HDR_BAD_NAME_CHARS));
+
+ /* Check raw_name still works properly */
+ hname = rfc822_header_raw_name(msg, hdr);
+
+ allocation_failure_check();
+
+ ok1(hname.ptr && hname.len == NAME_TEMPLATE_LEN);
+ ok1((hname.ptr[0] == c) &&
+ (memcmp(hname.ptr + 1, NAME_TEMPLATE + 1, NAME_TEMPLATE_LEN - 1) == 0));
+
+ rfc822_free(msg);
+
+ allocation_failure_check();
+
+ return !!(errs & RFC822_HDR_BAD_NAME_CHARS);
+}
+
+int main(int argc, char *argv[])
+{
+ char c;
+
+ failtest_setup(argc, argv);
+
+ plan_tests(5 * (1 + 3 + 4));
+
+ ok1(!bad_name(bad_name_template, bad_name_template[0]));
+
+ /* Good characters */
+ foreach_int(c, 'a', 'Z', '3') {
+ char *tmp = strdup(bad_name_template);
+
+ tmp[0] = c;
+
+ ok1(!bad_name(tmp, c));
+
+ free(tmp);
+ }
+
+ /* Bad characters */
+ foreach_int(c, ' ', '\t', '\b', '\x80') {
+ char *tmp = strdup(bad_name_template);
+
+ tmp[0] = c;
+
+ ok1(bad_name(tmp, c));
+
+ free(tmp);
+ }
+
+ /* This exits depending on whether all tests passed */
+ failtest_exit(exit_status());
+}