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#include "irc.h"
#include "debug.h"
#include "conf.h"
#include "util.h"
int g_ircsock = -1;
char *g_chanlist[] = {
"a",
"b",
"g",
"cg",
"secret-channel",
};
const int g_nchannels = sizeof(g_chanlist)/sizeof(g_chanlist[0]);
int
irc_connect()
{
struct addrinfo hints;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
printf("connecting to %s:%s....\n",HOST,PORT);
int status;
struct addrinfo *res;
if ((status = getaddrinfo(HOST, PORT, &hints, &res)) != 0) {
fprintf(stderr, "gettaddrinfo fail: %s\n", gai_strerror(status));
return -1;
}
int sockfd;
for (; res != NULL; res = res->ai_next) {
if ((sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) {
perror("socket");
continue;
}
if (connect(sockfd, res->ai_addr, res->ai_addrlen) != 0) {
perror("connect");
continue;
}
goto success;
}
return -1;
success:
g_ircsock = sockfd;
return 0;
}
int
irc_sendall(char msg[], size_t len)
{
return sendall(g_ircsock, msg, len);
}
int
irc_handshake()
{
#define E(x) do { if (x==-1) { perror("irc_sendall"); return -1; } } while(0)
char msg1[] = "NICK "NICK"\r\nUSER "USERNAME" 0 * :"REALNAME"\r\n";
E(irc_sendall(msg1, sizeof msg1-1));
for (int i = 0; i<g_nchannels; i++) {
if (strlen(g_chanlist[i]) > 16) {
fprintf(stderr,"channel name too long (%s)\n",g_chanlist[i]);
return -1;
}
E(irc_sendall("JOIN #",6));
E(irc_sendall(g_chanlist[i],strlen(g_chanlist[i])));
E(irc_sendall("\r\n",2));
}
#undef E
return 0;
}
/* **** */
static void
handle(char msg[], size_t len)
{
printf("HANDLE {");
int i;
for (i=0; i<len; i++) {
switch (msg[i]) {
case '\r':
printf("<CR>");
break;
case '\n':
printf("<LF>");
break;
default:
putchar(msg[i]);
break;
}
}
printf("}\n");
if (len >=4 && strncmp(msg, "PING", 4) == 0) {
DP("ponging");
// this modifies buffer in place. which is presumably fine
msg[1] = 'O';
irc_sendall(msg,len);
}
}
#define RECVBUF_SIZE 1024
char recv_buf[RECVBUF_SIZE];
char *recv_cur = &recv_buf[0];
// one past the end
char *recv_end = &recv_buf[RECVBUF_SIZE];
// i can't be bothered to implement a proper circular buffer
// (it'd be more effort than this anyway, for very little gain)
// the start of the buffer (index 0) is always the start of the buffer
// then cur points to one past the most recently recieved byte.
// after processing a message, if there's more stuff in the buffer, memmove it back.
// returns -2 on eof, -1 on other error, 0 on success
int
irc_recv()
{
ssize_t amt;
if ((amt = recv(g_ircsock, recv_cur, recv_end-recv_cur, 0)) == -1) {
// socket error
perror("recv");
return -1;
} else if (amt == 0) {
// eof
fprintf(stderr,"irc eof\n");
return -2;
}
DPf("recieved %ld ",amt);
// find the end of a message
char *c;
char *end = recv_cur+amt;
char *msg_start = recv_buf;
DPn("BUF",recv_buf,end-recv_buf);
for (c=recv_buf; c<end; c++) {
if (*c == '\r' && *(c+1) == '\n') {
handle(msg_start, (c+2)-msg_start);
msg_start = c+2;
c++;
}
}
if (msg_start == end)
recv_cur = recv_buf;
else {
size_t remlen = end - msg_start;
if (remlen > 512) {
fprintf(stderr,"my receive buffer is filled with NONSENSE!!!\n");
return -1;
}
if (recv_buf != msg_start) {
DPf("mem moving %ld\n",remlen);
memmove(recv_buf, msg_start, remlen);
}
recv_cur = recv_buf + remlen;
}
return 0;
}
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