cosmopolitan/test/libc/dns/servicestxt_test.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
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#include "libc/dns/servicestxt.h"

#include "libc/dns/dns.h"
#include "libc/dns/ent.h"
#include "libc/calls/calls.h"
#include "libc/testlib/testlib.h"

char testlib_enable_tmp_setup_teardown;

void SetUp() {
  int fd;
  const char* sample = "\
# skip comment string\n\
chargen		19/tcp		ttytst source\n\
chargen		19/udp		ttytst source\n\
ssh		    22/tcp		# SSH Remote Login Protocol";

  ASSERT_NE(-1, (fd = creat("services", 0755)));
  ASSERT_NE(-1, write(fd, sample, strlen(sample)));
  ASSERT_NE(-1, close(fd));
}

TEST(LookupServicesByPort, GetNameWhenPortCorrect) {
  char name[16]; /* sample has only names of length 3 */
  char proto1[] = "tcp";
  char proto2[] = "udp";
  char* localproto[1];

  localproto[0] = NULL;
  ASSERT_EQ(
      -1, /* non existent port */
      LookupServicesByPort(965, localproto, name, sizeof(name), "services"));
  ASSERT_EQ(NULL, localproto[0]);

  ASSERT_EQ(
      -1, /* port not in network byte order */
      LookupServicesByPort(22, localproto, name, sizeof(name), "services"));
  ASSERT_EQ(NULL, localproto[0]);

  localproto[0] = proto2;
  ASSERT_EQ(-1, /* port ok but wrong protocol */
            LookupServicesByPort(htons(22), localproto, name, sizeof(name),
                                 "services"));
  ASSERT_EQ(localproto[0], proto2);

  localproto[0] = proto1;
  ASSERT_EQ(0, LookupServicesByPort(htons(22), localproto, name, sizeof(name),
                                    "services"));
  ASSERT_STREQ(name, "ssh");
  ASSERT_EQ(localproto[0], proto1);

  localproto[0] = proto2;
  ASSERT_EQ(0, LookupServicesByPort(htons(19), localproto, name,
                                    sizeof(name), "services"));
  ASSERT_STREQ(name, "chargen");
  ASSERT_EQ(localproto[0], proto2);

  localproto[0] = NULL;
  ASSERT_EQ(0, /* pick first matching protocol */
            LookupServicesByPort(htons(19), localproto, name, sizeof(name),
                                 "services"));
  ASSERT_STREQ(name, "chargen");
  ASSERT_NE(NULL, localproto[0]); /* got alloc'd during the call */
  ASSERT_STREQ(localproto[0], "tcp");
  free(localproto[0]);
}

TEST(LookupServicesByName, GetPortWhenNameOrAlias) {
  char name[16]; /* sample has only names of length 3 */
  char proto1[] = "tcp";
  char proto2[] = "udp";
  char* localproto[1];

  localproto[0] = NULL;
  ASSERT_EQ(
      -1, /* non-existent name */
      LookupServicesByName("http", localproto, name, sizeof(name), "services"));
  ASSERT_EQ(NULL, localproto[0]);

  localproto[0] = proto2;
  ASSERT_EQ(
      -1, /* name exists but wrong protocol */
      LookupServicesByName("ssh", localproto, name, sizeof(name), "services"));
  ASSERT_EQ(localproto[0], proto2);

  localproto[0] = proto1;
  ASSERT_EQ(
      htons(22), /* in network byte order */
      LookupServicesByName("ssh", localproto, name, sizeof(name), "services"));
  ASSERT_STREQ(name, "ssh"); /* official name written to buffer */
  ASSERT_EQ(localproto[0], proto1);

  localproto[0] = proto2;
  ASSERT_EQ(htons(19), /* works if alias provided */
            LookupServicesByName("ttytst", localproto, name, sizeof(name),
                                 "services"));
  ASSERT_STREQ(name, "chargen"); /* official name written to buffer */
  ASSERT_EQ(localproto[0], proto2);

  localproto[0] = NULL;
  ASSERT_EQ(htons(19), /* pick first matching protocol */
            LookupServicesByName("source", localproto, name, sizeof(name),
                                 "services"));
  ASSERT_STREQ(name, "chargen");
  ASSERT_NE(NULL, localproto[0]); /* got alloc'd during the call */
  ASSERT_STREQ(localproto[0], "tcp");
  free(localproto[0]);
}