commit b0ccba1b1bb6c0ab7932b0b2f405537e0862aefb
Author: Kamil Bartczak <kontakt@kamilbartczak.pl>
Date:   Sat Jan 12 22:50:44 2019 +0100

    cw2zad3

diff --git a/cw2zad3/drugie/client b/cw2zad3/drugie/client
new file mode 100755
index 0000000..ea7c70d
Binary files /dev/null and b/cw2zad3/drugie/client differ
diff --git a/cw2zad3/drugie/client.c b/cw2zad3/drugie/client.c
new file mode 100644
index 0000000..a7e4ae9
--- /dev/null
+++ b/cw2zad3/drugie/client.c
@@ -0,0 +1,63 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/time.h>
+
+#define BUFFER_SIZE 30000
+#define ATTEMPTS 100
+
+char buf[BUFFER_SIZE];
+
+/*
+argv[1] - nazwa hosta
+argv[2] - numer portu
+*/
+int main(int argc, char **argv)
+{
+    struct sockaddr_in endpoint;
+    int sdsocket, addrlen, i, received;
+    struct hostent *he;
+    struct timeval time_b, time_e;
+
+    if (argc<3) {
+        printf("podaj nazwe hosta i numer portu jako parametry\n");
+        return 1;
+    }
+
+    he = gethostbyname(argv[1]);
+    if (he == NULL) {
+        printf("Nieznany host: %s\n",argv[1]);
+        return 0;
+    }
+
+    endpoint.sin_family = AF_INET;
+    endpoint.sin_port = htons(atoi(argv[2]));
+    endpoint.sin_addr = *(struct in_addr*) he->h_addr;
+    addrlen = sizeof(struct sockaddr_in);
+
+    gettimeofday(&time_b, NULL);
+    for (i=0; i<ATTEMPTS; i++) {
+
+        if ((sdsocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+            printf("socket() %d nie powiodl sie\n", i);
+            return 1;
+        }
+
+        sendto(sdsocket, buf, BUFFER_SIZE, 0, (struct sockaddr*) &endpoint, addrlen);
+
+        received = 0;
+    }
+    gettimeofday(&time_e, NULL);
+
+    printf("czas: %.6f s\n",
+        (((double) (time_e.tv_sec - time_b.tv_sec) * 1000000) +
+        ((double) (time_e.tv_usec - time_b.tv_usec)))
+        / (1000000.0 * ATTEMPTS));
+    return 0;
+}
\ No newline at end of file
diff --git a/cw2zad3/drugie/server b/cw2zad3/drugie/server
new file mode 100755
index 0000000..d40b0f8
Binary files /dev/null and b/cw2zad3/drugie/server differ
diff --git a/cw2zad3/drugie/server.c b/cw2zad3/drugie/server.c
new file mode 100644
index 0000000..f382519
--- /dev/null
+++ b/cw2zad3/drugie/server.c
@@ -0,0 +1,63 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+/* rozmiar bufora */
+#define BUFFER_SIZE 30000
+
+/* liczba powtorzen */
+#define ATTEMPTS 100
+
+char buf[BUFFER_SIZE];
+
+/*
+argv[1] - numer portu
+*/
+int main(int argc, char **argv)
+{
+    struct sockaddr_in myaddr, endpoint;
+    int sdsocket, sdconnection, addrlen, received;
+
+    if (argc < 2) {
+        printf("podaj numer portu jako parametr\n");
+        return 1;
+    }
+
+    sdsocket = socket(AF_INET, SOCK_DGRAM, 0);
+    addrlen = sizeof(struct sockaddr_in);
+
+    myaddr.sin_family = AF_INET;
+    myaddr.sin_port = htons(atoi(argv[1]));
+    myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    if (bind(sdsocket,(struct sockaddr*) &myaddr,addrlen) < 0) {
+        printf("bind() nie powiodl sie\n");
+        return 1;
+    }
+
+    received = 0;
+
+    while(1) {
+    /* odbior moze odbywac sie w mniejszych
+        segmentach */
+        while (received < BUFFER_SIZE)
+        {
+            received += recvfrom(sdsocket,
+                            buf+received,
+                            BUFFER_SIZE-received,
+                            0,
+                            (struct sockaddr*) &endpoint,
+                            &addrlen);
+        }
+
+        sendto(sdsocket, buf, BUFFER_SIZE, 0, (struct sockaddr*) &endpoint, addrlen);
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/cw2zad3/pierwsze/client b/cw2zad3/pierwsze/client
new file mode 100755
index 0000000..4807a05
Binary files /dev/null and b/cw2zad3/pierwsze/client differ
diff --git a/cw2zad3/pierwsze/client.c b/cw2zad3/pierwsze/client.c
new file mode 100644
index 0000000..7d3a37f
--- /dev/null
+++ b/cw2zad3/pierwsze/client.c
@@ -0,0 +1,74 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/time.h>
+
+#define BUFFER_SIZE 30000
+#define ATTEMPTS 100
+
+char buf[BUFFER_SIZE];
+
+/*
+argv[1] - nazwa hosta
+argv[2] - numer portu
+*/
+int main(int argc, char **argv)
+{
+    struct sockaddr_in endpoint;
+    int sdsocket, addrlen, i, received;
+    struct hostent *he;
+    struct timeval time_b, time_e;
+
+    if (argc<3) {
+        printf("podaj nazwe hosta i numer portu jako parametry (provide hostname and port number in command line)\n");
+        return 1;
+    }
+
+    he = gethostbyname(argv[1]);
+    if (he == NULL) {
+        printf("Nieznany host (unknown kost): %s\n",argv[1]);
+        return 0;
+    }
+
+    endpoint.sin_family = AF_INET;
+    endpoint.sin_port = htons(atoi(argv[2]));
+    endpoint.sin_addr = *(struct in_addr*) he->h_addr;
+    addrlen = sizeof(struct sockaddr_in);
+
+    gettimeofday(&time_b, NULL);
+    for (i=0; i<ATTEMPTS; i++) {
+
+        if ((sdsocket = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+            printf("socket() %d nie powiodl sie (failed)\n", i);
+            return 1;
+        }
+
+        if (connect(sdsocket,(struct sockaddr*) &endpoint, addrlen) < 0) {
+            printf("connect() %d nie powiodl sie (failed)\n", i);
+            return 0;
+        }
+        send(sdsocket, buf, BUFFER_SIZE, 0);
+        received = 0;
+        while (received < BUFFER_SIZE)
+        {
+            received += recv(sdsocket, 
+                             buf+received, 
+                             BUFFER_SIZE-received, 
+                             0);
+        }
+        close(sdsocket);
+    }
+    gettimeofday(&time_e, NULL);
+
+    printf("czas: %.6f s\n",
+        (((double) (time_e.tv_sec - time_b.tv_sec) * 1000000) +
+        ((double) (time_e.tv_usec - time_b.tv_usec)))
+        / (1000000.0 * ATTEMPTS));
+    return 0;
+}
diff --git a/cw2zad3/pierwsze/server b/cw2zad3/pierwsze/server
new file mode 100755
index 0000000..8646ccd
Binary files /dev/null and b/cw2zad3/pierwsze/server differ
diff --git a/cw2zad3/pierwsze/server.c b/cw2zad3/pierwsze/server.c
new file mode 100644
index 0000000..24dfe3d
--- /dev/null
+++ b/cw2zad3/pierwsze/server.c
@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+/* rozmiar bufora */
+#define BUFFER_SIZE 30000
+
+/* liczba powtorzen */
+#define ATTEMPTS 100
+
+char buf[BUFFER_SIZE];
+
+/*
+argv[1] - numer portu
+*/
+int main(int argc, char **argv)
+{
+    struct sockaddr_in myaddr, endpoint;
+    int sdsocket, sdconnection, addrlen, received;
+
+    if (argc < 2) {
+        printf("podaj numer portu jako parametr\n");
+        return 1;
+    }
+
+    sdsocket = socket(AF_INET, SOCK_STREAM, 0);
+    addrlen = sizeof(struct sockaddr_in);
+
+    myaddr.sin_family = AF_INET;
+    myaddr.sin_port = htons(atoi(argv[1]));
+    myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    if (bind(sdsocket,(struct sockaddr*) &myaddr,addrlen) < 0) {
+        printf("bind() nie powiodl sie\n");
+        return 1;
+    }
+
+    if (listen(sdsocket, 10) < 0) {
+        printf("listen() nie powiodl sie\n");
+        return 1;
+    }
+
+    while ((sdconnection = 
+            accept(sdsocket, 
+                   (struct sockaddr*) &endpoint, 
+                   &addrlen)) >= 0) 
+    {
+        received = 0;
+        /* odbior moze odbywac sie w mniejszych
+        segmentach */
+        while (received < BUFFER_SIZE)
+        {
+            received += recv(sdconnection, 
+                             buf+received, 
+                             BUFFER_SIZE-received,
+                             0);
+        }
+        send(sdconnection, buf, BUFFER_SIZE, 0);
+        close(sdconnection);
+    }
+
+    close(sdsocket);
+    return 0;
+}
+