The protocolentry class provides methods for retrieving network protocol definitions. These are usually defined in a file like /etc/protocols on unix-like systems or C:\Windows\System32\drivers\etc\protocol on Windows, or are served from another source via the name-service switch.
Protocols can be looked up by name or number.
This example retrieves network protocol information for the "tcp" protocol.
#include <rudiments/protocolentry.h>
#include <rudiments/stdio.h>
int main(int argc, const char **argv) {
// get the protocol entry for the "tcp" protocol
protocolentry pe;
pe.initialize("tcp");
// print out details
stdoutput.printf(" Name: %s\n",pe.getName());
stdoutput.printf(" Alias list:\n");
for (uint32_t i=0; pe.getAliasList() && pe.getAliasList()[i]; i++) {
stdoutput.printf(" %s\n",pe.getAliasList()[i]);
}
stdoutput.printf(" Number: %d\n",pe.getNumber());
stdoutput.printf("\n");
}
This example retrieves network protocol information for "protocol number 6".
#include <rudiments/protocolentry.h>
#include <rudiments/stdio.h>
int main(int argc, const char **argv) {
// get the protocol entry for "protocol number 6"
protocolentry pe;
pe.initialize(6);
// print out details
stdoutput.printf(" Name: %s\n",pe.getName());
stdoutput.printf(" Alias list:\n");
for (uint32_t i=0; pe.getAliasList() && pe.getAliasList()[i]; i++) {
stdoutput.printf(" %s\n",pe.getAliasList()[i]);
}
stdoutput.printf(" Number: %d\n",pe.getNumber());
stdoutput.printf("\n");
}