From a0069d69d064ba98176c7c19dc6c503909661ed0 Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Tue, 14 Dec 2021 15:50:29 +0000
Subject: initial commit

---
 thing.c | 210 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 210 insertions(+)
 create mode 100644 thing.c

diff --git a/thing.c b/thing.c
new file mode 100644
index 0000000..2ffd843
--- /dev/null
+++ b/thing.c
@@ -0,0 +1,210 @@
+#ifdef LOCAL
+#define HOST "0.0.0.0"
+#define PORT "6970"
+#else
+#define HOST "ubq323.website"
+#define PORT "6667"
+#endif
+
+#define NICK "ffbm"
+#define USERNAME "ffbm"
+#define REALNAME ",flappy fly bird man?"
+#define CHANNEL "#a"
+
+#define PIPE "/run/apionet.pipe"
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+int hasjoined = 0;
+
+ssize_t sendall(int sockfd, void *buf, size_t len) {
+    ssize_t total_sent = 0;
+    ssize_t sent;
+    do {
+        if ((sent = send(sockfd, buf+total_sent, len-total_sent, 0)) == -1) {
+            return -1;
+        }
+        total_sent += sent;
+    } while (total_sent < len);
+    total_sent = 0;
+    do {
+        if ((sent = write(0, buf+total_sent, len-total_sent)) == -1) {
+            return -1;
+        }
+        total_sent += sent;
+    } while (total_sent < len);
+    return total_sent;
+}
+
+int irc_connect() {
+    struct addrinfo hints;
+    int status, sockfd; 
+    struct addrinfo *res;
+    
+    memset(&hints, 0, sizeof hints);
+    hints.ai_family = AF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+
+    // assuming the first one is valid because it normally is 
+
+    if ((status = getaddrinfo(HOST, PORT, &hints, &res)) != 0) {
+        fprintf(stderr, "getaddrinfo fail: %s\n", gai_strerror(status));
+        return -1;
+    }
+
+    if ((sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) {
+        perror("socket");
+        return -1;
+    }
+    if (connect(sockfd, res->ai_addr, res->ai_addrlen) != 0) {
+        perror("connect");
+        return -1;
+    }
+    return sockfd;
+}
+
+int irc_handshake(int sockfd) {
+    char msg[] = "NICK "NICK"\r\nUSER "USERNAME" 0 * :"REALNAME"\r\nJOIN "CHANNEL"\r\n";
+    if (sendall(sockfd, msg, sizeof msg-1) == -1) {
+        return -1;
+    }
+    return 0;
+}
+
+void irc_handle(int sockfd, char *start, char *end) {
+    if (strncmp(start, "PING", 4) == 0) { 
+        start[1] = 'O';
+        sendall(sockfd, start, end-start);
+        start[1] = 'I';
+    }
+    char *str = strndup(start, end-start);    
+    printf("[%s]\n",str);
+    free(str);
+}
+
+void irc_recv(int sockfd) {
+    char recvbuf[1024];
+    ssize_t amt;
+    if ((amt = recv(sockfd, recvbuf, 1024, 0)) == -1) {
+        perror("recv");
+        exit(1);
+    }
+
+    char *start = &recvbuf[0];
+    char *cur;
+    char *end = start+amt ;
+    for (cur = start; cur < end; cur++) { 
+        if (*cur == '\r' && *(cur+1) == '\n') {
+            irc_handle(sockfd, start, cur+2);
+            start = cur + 2;
+            cur = start;
+        }
+    }
+}
+
+int main(int argc, char *argv[]) {
+    // this only works on linux, i think.
+    // sorry
+    int pipefd = open(PIPE, O_RDWR|O_NONBLOCK);
+    if (pipefd == -1) {
+        perror("(pipe) open");
+        return 1;
+    }
+
+    printf("bees\n");
+    int sockfd = irc_connect();
+    if (sockfd == -1) {
+        return 1;
+    }
+    if (irc_handshake(sockfd) != 0) {
+        perror("irc_handshake");
+        return 1;
+    }
+
+    // setup pollfds
+    struct pollfd pollfds[2] = {
+        {
+            .fd = pipefd,
+            .events = POLLIN,
+        }, 
+        {
+            .fd = sockfd,
+            .events = POLLIN,
+        },
+    };
+    printf("POLLIN %d POLLERR %d POLLHUP %d\n",POLLIN,POLLERR,POLLHUP);
+    for (;;) {
+        int r;
+        if ((r = poll(pollfds, 2, -1)) == -1) {
+            perror("poll");
+            return 1;
+        }
+        printf("poll %d\n",r);
+        printf("sock %d pipe %d\n",pollfds[1].revents, pollfds[0].revents);
+        
+        if (pollfds[1].revents & POLLHUP) {
+            // socket closed, probably
+            puts("socket hup");
+            break;
+        }
+        if (pollfds[1].revents & POLLERR) {
+            // socket error 
+            puts("socket err");
+            break;
+        }
+        if (pollfds[1].revents & POLLIN) {
+            // socket 
+            char buf[1];
+            // there is probably a better way of doing this 
+            // but if there is, i don't know what it is
+            ssize_t h = recv(sockfd, buf, 1, MSG_PEEK);
+            if (h<0) {
+                perror("recv");
+                return -1;
+            } else if (h == 0) {
+                // eof ish 
+                puts("socket end");
+                break;
+            } else {
+                irc_recv(sockfd);
+            }
+        }
+        if (pollfds[0].revents & POLLIN) {
+            puts("pipe");
+            ssize_t amt;
+            unsigned char buf[128];
+            if ((amt = read(pipefd, buf, 128)) == -1) {
+                perror("(pipe) read");
+                return 1;
+            }
+            for (size_t i = 0; i < amt; i++) {
+                if (buf[i] == '\r' || buf[i] == '\n' || buf[i] < ' ') {
+                    buf[i] = ' ';
+                }
+            }
+            char msg[] = "PRIVMSG "CHANNEL" :";
+
+            if (sendall(sockfd, msg, sizeof msg-1) == -1) { perror("sendall"); exit(1); }
+            if (sendall(sockfd, buf, amt) == -1) { perror("sendall"); exit(1); }
+            if (sendall(sockfd, "\r\n", 2) == -1) { perror("sendall"); exit(1); }
+        }
+    }
+        
+    
+    
+    
+    return 0;
+}
-- 
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