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#include "sockets.h"
// get sockaddr, IPv4 or IPv6:
void *get_in_addr(struct sockaddr *sa) {
if (sa->sa_family == AF_INET) {
return &(((struct sockaddr_in*)sa)->sin_addr);
}
return &(((struct sockaddr_in6*)sa)->sin6_addr);
}
// Create socket to connect to real IRC server
int createserversocket(char *host, char *port) {
int sockfd;
struct addrinfo hints, *servinfo, *p;
int rv;// return value for getaddrinfo (for error message)
char s[INET6_ADDRSTRLEN];
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if ((rv = getaddrinfo(host, port, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
// loop through all the results and connect to the first we can
for (p = servinfo; p != NULL; p = p->ai_next) {
if ((sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
perror("bouncer-server: socket");
continue;
}
if (connect(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
close(sockfd);
perror("bouncer-server: connect");
continue;
}
break;
}
if (p == NULL) {
fprintf(stderr, "bouncer-server: failed to connect\n");
return 2;
}
inet_ntop(p->ai_family, get_in_addr((struct sockaddr *)p->ai_addr), s, sizeof s);
printf("bouncer-server: connecting to %s\n", s);
freeaddrinfo(servinfo); // all done with this structure
return sockfd;
}
// Create listening socket to listen for bouncer client connections
int createclientsocket(char *listenport) {
listenport = BOUNCERLISTENPORT;
int listener; // listening socket descriptor
int rv; // return value for getaddrinfo (for error message)
struct addrinfo hints, *ai, *p;
int yes = 1; // for enabling socket options with setsockopt
// get us a socket and bind it
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if ((rv = getaddrinfo(NULL, listenport, &hints, &ai)) != 0) {
fprintf(stderr, "bouncer-client: %s\n", gai_strerror(rv));
exit(1);
}
// Try for IPv6
for (p = ai; p != NULL; p = p->ai_next) {
if (p->ai_family == AF_INET6) {
listener = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
if (listener != -1) {
// success, got IPv6!
printf("success, got IPv6! ai_family: %d\n", p->ai_family);
break;
}
}
}
// Try for IPv4 if IPv6 failed
if (listener < 0) {
for (p = ai; p != NULL; p = p->ai_next) {
if (p->ai_family == AF_INET) {
listener = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
if (listener != -1) {
// moderate success, got IPv4!
printf("moderate success, got IPv4! ai_family: %d\n", p->ai_family);
break;
}
}
}
}
// allow address re-use
setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)); // 1 as in non-zero as in enable
if (bind(listener, p->ai_addr, p->ai_addrlen) < 0) {
// failed to bind
close(listener);
printf("bouncer-client: failed to bind, exiting...\n");
exit(1);
}
// if we got here, it means we didn't get bound
if (p == NULL) {
fprintf(stderr, "bouncer-client: failed to bind\n");
exit(2);
}
freeaddrinfo(ai); // all done with this
// listen
if (listen(listener, BACKLOG) == -1) {
perror("listen");
exit(1);
}
return listener;
}
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