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-rw-r--r--Semestr 4/aisd/Wykłady/Notatka 7 - Programowanie Dynamiczne cd.pdfbin0 -> 214965 bytes
-rw-r--r--Semestr 4/sieci/pracownia1/traceroute.c21
2 files changed, 18 insertions, 3 deletions
diff --git a/Semestr 4/aisd/Wykłady/Notatka 7 - Programowanie Dynamiczne cd.pdf b/Semestr 4/aisd/Wykłady/Notatka 7 - Programowanie Dynamiczne cd.pdf
new file mode 100644
index 0000000..7040119
--- /dev/null
+++ b/Semestr 4/aisd/Wykłady/Notatka 7 - Programowanie Dynamiczne cd.pdf
Binary files differ
diff --git a/Semestr 4/sieci/pracownia1/traceroute.c b/Semestr 4/sieci/pracownia1/traceroute.c
index 7918957..88d233a 100644
--- a/Semestr 4/sieci/pracownia1/traceroute.c
+++ b/Semestr 4/sieci/pracownia1/traceroute.c
@@ -7,6 +7,7 @@
#include <stdlib.h>
#include <netinet/ip_icmp.h>
#include <assert.h>
+#include <time.h>
#define MAX_TTL 30
#define MESSAGES_PER_TTL 3
@@ -84,12 +85,26 @@ void send_icmp_packet(int sockfd, struct sockaddr_in *destination, int ttl) {
fprintf(stdout, "Bytes sent: %ld\n", bytes_sent);
}
+/* Return ip address of the sender of recceived package */
+in_addr_t recv_dontwait(int sockfd) {
+ struct sockaddr_in sender;
+ socklen_t sender_len = sizeof(sender);
+ uint8_t buffer[IP_MAXPACKET];
+
+ ssize_t packet_len = recvfrom(sockfd, buffer, IP_MAXPACKET, MSG_DONTWAIT,
+ (struct sockaddr*)&sender, &sender_len);
+
+ if (packet_len == -1) {
+ fprintf(stderr, "Error while recieving a packet: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ return sender.sin_addr.s_addr;
+}
+
int traceroute(struct sockaddr_in *destination) {
int sockfd = create_raw_icmp_socket();
- struct sockaddr_in sender;
- socklen_t sender_len = sizeof(sender);
- uint8_t buffer[IP_MAXPACKET];
for (int ttl = 1; ttl <= MAX_TTL; ++ttl) {
send_icmp_packet(sockfd, destination, ttl);
}