added .gitignore to ignore builds

[irssi-notify.git] / server.c

diff --git a/server.c b/server.c
index 74cf914..527d737 100644 (file)
--- a/server.c
+++ b/server.c
@@ -1,7 +1,3 @@
-/*
-** server.c -- a stream socket server demo
-*/
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -24,29 +20,28 @@ void sigchld_handler(int s)
        while(waitpid(-1, NULL, WNOHANG) > 0);
 }
 
-// get sockaddr, IPv4 or IPv6:
+// get sockaddr, IPv4
 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);
 }
 
 int main(void)
 {
-       int sockfd, new_fd;  // listen on sock_fd, new connection on new_fd
+       int sockfd, activefd;  // listen on sockfd, new connection on activefd
        struct addrinfo hints, *servinfo, *p;
        struct sockaddr_storage their_addr; // connector's address information
        socklen_t sin_size;
        struct sigaction sa;
        int yes=1;
-       char s[INET6_ADDRSTRLEN];
+       char source[INET6_ADDRSTRLEN];
+//    char CLIENT_IP[15] = "107.21.205.69\0";
        int rv;
 
-       memset(&hints, 0, sizeof hints);
-       hints.ai_family = AF_UNSPEC;
+       memset(&hints, 0, sizeof hints); // make sure the struct is empty
+       hints.ai_family = AF_INET; // IPv4
        hints.ai_socktype = SOCK_STREAM;
        hints.ai_flags = AI_PASSIVE; // use my IP
 
@@ -55,11 +50,13 @@ int main(void)
                return 1;
        }
 
+    // servinfo now points to a linked list of 1 or more struct addrinfos
+
        // loop through all the results and bind 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("server: socket");
+                       perror("irssi-notify: socket");
                        continue;
                }
 
@@ -71,7 +68,7 @@ int main(void)
 
                if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
                        close(sockfd);
-                       perror("server: bind");
+                       perror("irssi-notify: bind");
                        continue;
                }
 
@@ -79,7 +76,7 @@ int main(void)
        }
 
        if (p == NULL)  {
-               fprintf(stderr, "server: failed to bind\n");
+               fprintf(stderr, "irssi-notify: failed to bind\n");
                return 2;
        }
 
@@ -98,31 +95,47 @@ int main(void)
                exit(1);
        }
 
-       printf("server: waiting for connections...\n");
+       printf("irssi-notify: waiting for connections...\n");
 
        while(1) {  // main accept() loop
                sin_size = sizeof their_addr;
-               new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
-               if (new_fd == -1) {
+               activefd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
+               if (activefd == -1) {
                        perror("accept");
                        continue;
                }
 
                inet_ntop(their_addr.ss_family,
                        get_in_addr((struct sockaddr *)&their_addr),
-                       s, sizeof s);
-               printf("server: got connection from %s\n", s);
+                       source, sizeof source);
+
+        if (strcmp(source, "50.16.219.8") != 0 &&
+                strcmp(source, "127.0.0.1") != 0){
+            close(activefd);
+            continue;
+        }                                                                       
 
                if (!fork()) { // this is the child process
                        close(sockfd); // child doesn't need the listener
-                       if (send(new_fd, "Hello, world!", 13, 0) == -1)
-                               perror("send");
-                       close(new_fd);
+            char buf[4096];
+            if (recv(activefd, buf, 99, 0) == -1) {
+                perror("recv");
+                exit(1);
+            }
+            buf[4096] = '\0';
+            printf("irssi-notify: recieved '%s'\n", buf);
+            if (!fork()){
+                setenv("DISPLAY", ":0", 1); // doesn't seem to be doing the trick
+                execlp("notify-display",
+                        "notify-display", buf, NULL);
+            // the first argument to execl is the command, the second is the first argument
+            // passed to the program ($0), customarily the evocation of the command
+            }
+                       close(activefd);
                        exit(0);
                }
-               close(new_fd);  // parent doesn't need this
+               close(activefd);
        }
 
        return 0;
 }
-