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#include <assert.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void checkEntryByValue(char* name, int port, char** aliasArray) {
struct protoent* entry;
char** aliases;
// Perform a protocol look up by name
entry = getprotobyname(name);
assert(entry != NULL);
// Check results
assert(strcmp(name, entry->p_name) == 0);
assert(port == entry->p_proto);
aliases = entry->p_aliases;
for (int i = 0; aliases[i] != NULL; i++) {
assert(strcmp(aliases[i], aliasArray[i]) == 0);
}
// Perform a protocol look up by number
entry = getprotobynumber(port);
assert(entry != NULL);
// Check results
assert(strcmp(name, entry->p_name) == 0);
assert(port == entry->p_proto);
aliases = entry->p_aliases;
for (int i = 0; aliases[i] != NULL; i++) {
assert(strcmp(aliases[i], aliasArray[i]) == 0);
}
}
void checkEntryDatabase() {
struct protoent* entry;
// Don't call setprotoent() initially as getprotoent() should open the "database" if necessary.
entry = getprotoent();
assert(entry != NULL);
assert(strcmp("tcp", entry->p_name) == 0);
entry = getprotoent();
assert(entry != NULL);
assert(strcmp("udp", entry->p_name) == 0);
// Check that setprotoent() correctly sets the next entry to the first entry
setprotoent(1);
entry = getprotoent();
assert(entry != NULL);
assert(strcmp("tcp", entry->p_name) == 0);
entry = getprotoent();
assert(entry != NULL);
assert(strcmp("udp", entry->p_name) == 0);
// If we do a getprotoent() that goes past the end of the 'database' check that it returns NULL.
entry = getprotoent();
assert(entry == NULL);
}
int main() {
// First check getprotobyname() and getprotobynumber()
char* aliases[] = {"TCP"};
checkEntryByValue("tcp", 6, aliases);
aliases[0] = "UDP";
checkEntryByValue("udp", 17, aliases);
// Check that the doomsday protocol hasn't been implemented :-) ......
assert(getprotobyname("doomsday") == NULL);
// Now check setprotoent() and getprotoent()
checkEntryDatabase();
endprotoent();
puts("success");
return EXIT_SUCCESS;
}
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