summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--.gitignore1
-rw-r--r--Makefile5
-rw-r--r--pd_server.c83
3 files changed, 88 insertions, 1 deletions
diff --git a/.gitignore b/.gitignore
index 4007296..188150f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
tit4tat
prisoners_dilemma
+pd_server
diff --git a/Makefile b/Makefile
index 9f8ad86..23902ff 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,11 @@
-all: tit4tat prisoners_dilemma
+all: pd_server tit4tat prisoners_dilemma
tit4tat: tit4tat.c
gcc -std=c99 -Wall -o $@ $<
+pd_server: pd_server.c
+ gcc -o $@ $<
+
prisoners_dilemma: prisoners_dilemma.pl
gplc -o $@ $<
diff --git a/pd_server.c b/pd_server.c
new file mode 100644
index 0000000..d0b2315
--- /dev/null
+++ b/pd_server.c
@@ -0,0 +1,83 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+enum {
+ COORPERATION = 'c',
+ DEFECTION = 'd'
+};
+
+int pay(int a, int b)
+{
+ if (a == COORPERATION && b == DEFECTION) return 1;
+ if (a == DEFECTION && b == DEFECTION) return 2;
+ if (a == COORPERATION && b == COORPERATION) return 3;
+ if (a == DEFECTION && b == COORPERATION) return 4;
+
+ exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+ int sock, player[2], read_fd;
+ struct sockaddr_in serv_addr;
+ int port = 8068;
+ int rounds, i;
+ int optval = 1;
+
+ rounds = atoi(argv[1]);
+
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ if (sock < 0)
+ return EXIT_FAILURE;
+ setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
+ &optval, sizeof optval);
+ serv_addr.sin_family = AF_INET;
+ serv_addr.sin_addr.s_addr = INADDR_ANY;
+ serv_addr.sin_port = htons(port);
+ if (bind(sock, (struct sockaddr *) &serv_addr,
+ sizeof(serv_addr)) < 0) {
+ fprintf(stderr, "Failed to bind: %s\n",
+ strerror(errno));
+ return EXIT_FAILURE;
+ }
+ listen(sock, 2);
+
+ for (i = 0; i < 2; ++i) {
+ player[i] = accept(sock, NULL, NULL);
+ }
+ int a_payment = 0, b_payment = 0;
+ for (i = 0; i < rounds; ++i) {
+ char a, b;
+ read(player[0], &a, 1);
+ read(player[1], &b, 1);
+
+ if (a != 'c' && a != 'd') {
+ printf("a sent incorrect char: %c\n", a);
+ continue;
+ }
+ if (b != 'c' && b != 'd') {
+ printf("b sent incorrect char: %c\n", b);
+ continue;
+ }
+
+ a_payment += pay(a, b);
+ b_payment += pay(b, a);
+
+ printf("A [%c]: %d Euro\tB [%c]: %d Euro\t\t\tA: %d\tB: %d\n",
+ a, pay(a, b), b, pay(b, a), a_payment, b_payment);
+
+ write(player[0], &b, 1);
+ write(player[1], &a, 1);
+ }
+ close(player[0]);
+ close(player[1]);
+ close(sock);
+}