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added logic to determine who's client and who's server

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danemacfadden
2025-06-20 22:51:25 -06:00
parent 4d56ad394c
commit 1ebfafa0d1
1 changed files with 68 additions and 59 deletions
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main.c
+13 -4
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@@ -20,7 +20,7 @@
#define MAXBUFSIZE 30 #define MAXBUFSIZE 30
int socketfd, socketfd_send; int socketfd;
struct addrinfo hints, remote_hints; struct addrinfo hints, remote_hints;
struct addrinfo *servinfo, *remote_servinfo; struct addrinfo *servinfo, *remote_servinfo;
@@ -56,12 +56,14 @@ int main(int argc, char* argv[]) {
remote_machine = argv[2]; remote_machine = argv[2];
remote_port = argv[3]; remote_port = argv[3];
if (atoi(local_port) < atoi(remote_port)) {
/* Congrats, you're the server */
memset(&hints, 0, sizeof(hints)); memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET; hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM; hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE; hints.ai_flags = AI_PASSIVE;
if ((status = getaddrinfo(remote_machine, local_port, &hints, &servinfo)) != 0) { if ((status = getaddrinfo(NULL, local_port, &hints, &servinfo)) != 0) {
fprintf(stderr,"getaddrinfo error: %s\n",gai_strerror(status)); fprintf(stderr,"getaddrinfo error: %s\n",gai_strerror(status));
exit(1); exit(1);
} }
@@ -91,7 +93,9 @@ int main(int argc, char* argv[]) {
else { else {
servinfo = p; servinfo = p;
} }
}
else {
/* You're the client */
/* Get remote info */ /* Get remote info */
memset(&remote_hints, 0, sizeof(remote_hints)); memset(&remote_hints, 0, sizeof(remote_hints));
remote_hints.ai_family = AF_INET; remote_hints.ai_family = AF_INET;
@@ -104,7 +108,7 @@ int main(int argc, char* argv[]) {
} }
for (q = remote_servinfo; q != NULL; q = q->ai_next) { for (q = remote_servinfo; q != NULL; q = q->ai_next) {
/* Create socket */ /* Create socket */
if ((socketfd_send = socket(q->ai_family, if ((socketfd = socket(q->ai_family,
q->ai_socktype, q->ai_socktype,
q->ai_protocol)) == -1) { q->ai_protocol)) == -1) {
perror("talker: socket"); perror("talker: socket");
@@ -121,6 +125,11 @@ int main(int argc, char* argv[]) {
else { else {
remote_servinfo = q; remote_servinfo = q;
} }
}
pthread_create(&input_thread, NULL, input, (void*) msg); pthread_create(&input_thread, NULL, input, (void*) msg);