Add: error manager

Added function to print errors corresponding to the packet type and code values

includes/ft_ping.h

@@ -8,18 +8,15 @@
 #include <math.h>
 #include <stdlib.h>
 
-#include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/time.h>
 
-#include <netinet/ip_icmp.h>
 #include <arpa/inet.h>
 #include <netdb.h>
-#include <fcntl.h>
 
 #define PACKET_SIZE 64
 
-struct icmp_header
+struct net_icmp_header
 {
 	uint8_t type;
 	uint8_t code;
@@ -28,6 +25,14 @@ struct icmp_header
 	uint16_t seq;
 };
 
+struct net_packet
+{
+	uint8_t					data[PACKET_SIZE];
+	int						n_bytes;
+	struct sockaddr_in		addr;
+	struct net_icmp_header *icmp_hdr;
+};
+
 struct packet_stats
 {
 	uint16_t	n_packet_sent;
@@ -43,11 +48,13 @@ struct flags
 	double interval;
 	int preload_count;
 	int count;
+	int ttl;
 };
 
 //	PACKET UTILS
 uint16_t		make_checksum(uint16_t *data, int len);
 struct in_addr	get_addr_by_hostname(char *hostname);
+bool			parse_packet(struct net_packet packet, uint16_t seq, uint16_t checksum);
 
 //	MATH
 double			get_stddev(const double *timestamp_array);
@@ -59,6 +66,7 @@ long			ft_atoi(const char *nptr);
 //	VERBOSE
 void			print_help(void);
 bool			parse_opt(int argc, char **argv, struct flags *flags);
+void			print_packet_error(struct net_packet packet);
 
 // STATS
 void			print_recap(char *ip, const struct packet_stats stats);

includes/icmp_codes.h

@@ -0,0 +1,87 @@
+#pragma once
+
+typedef enum
+{
+    ICMP_ECHOREPLY = 0,        /* Echo Reply                        */
+    ICMP_DEST_UNREACH = 3,        /* Destination Unreachable        */
+    ICMP_SOURCE_QUENCH = 4,        /* Source Quench                */
+    ICMP_REDIRECT = 5,        /* Redirect (change route)        */
+    ICMP_ECHO = 8,        /* Echo Request                        */
+    ICMP_TIME_EXCEEDED = 11,        /* Time Exceeded                */
+    ICMP_PARAMETERPROB = 12,        /* Parameter Problem                */
+    ICMP_TIMESTAMP = 13,        /* Timestamp Request                */
+    ICMP_TIMESTAMPREPLY = 14,        /* Timestamp Reply                */
+    ICMP_INFO_REQUEST = 15,        /* Information Request                */
+    ICMP_INFO_REPLY = 16,        /* Information Reply                */
+    ICMP_ADDRESS = 17,        /* Address Mask Request                */
+    ICMP_ADDRESSREPLY = 18       /* Address Mask Reply                */
+}   net_icmp_types;
+
+
+typedef enum
+{
+    ICMP_NET_UNREACH = 0,        /* Network Unreachable                */
+    ICMP_HOST_UNREACH = 1,        /* Host Unreachable                */
+    ICMP_PROT_UNREACH = 2,        /* Protocol Unreachable                */
+    ICMP_PORT_UNREACH = 3,        /* Port Unreachable                */
+    ICMP_FRAG_NEEDED = 4,        /* Fragmentation Needed/DF set        */
+    ICMP_SR_FAILED = 5,        /* Source Route failed                */
+    ICMP_NET_UNKNOWN = 6,
+    ICMP_HOST_UNKNOWN = 7,
+    ICMP_HOST_ISOLATED = 8,
+    ICMP_NET_ANO = 9,
+    ICMP_HOST_ANO = 10,
+    ICMP_NET_UNR_TOS = 11,
+    ICMP_HOST_UNR_TOS = 12,
+    ICMP_PKT_FILTERED = 13,        /* Packet filtered */
+    ICMP_PREC_VIOLATION = 14,        /* Precedence violation */
+    ICMP_PREC_CUTOFF = 15        /* Precedence cut off */
+}   net_icmp_unreach_codes; /* Codes for UNREACH*/
+
+typedef enum
+{
+    ICMP_REDIR_NET = 0,
+    ICMP_REDIR_HOST = 1,
+    ICMP_REDIR_NETTOS = 2,
+    ICMP_REDIR_HOSTTOS = 3
+}   net_icmp_redirect_code; /* Codes for REDIRECT*/
+
+typedef enum
+{
+    ICMP_EXC_TTL = 0,
+    ICMP_EXC_FRAGTIME = 1
+}   net_icmp_time_code; /* Codes for TIME_EXCEEDED. */
+
+static const char *net_icmp_unreach_messages[] = 
+{
+    [ICMP_NET_UNREACH]    = "Network Unreachable",
+    [ICMP_HOST_UNREACH]   = "Host Unreachable",
+    [ICMP_PROT_UNREACH]   = "Protocol Unreachable",
+    [ICMP_PORT_UNREACH]   = "Port Unreachable",
+    [ICMP_FRAG_NEEDED]    = "Fragmentation Needed/DF set",
+    [ICMP_SR_FAILED]      = "Source Route failed",
+    [ICMP_NET_UNKNOWN]    = "Network Unknown",
+    [ICMP_HOST_UNKNOWN]   = "Host Unknown",
+    [ICMP_HOST_ISOLATED]  = "Host Isolated",
+    [ICMP_NET_ANO]        = "Network Administratively Prohibited",
+    [ICMP_HOST_ANO]       = "Host Administratively Prohibited",
+    [ICMP_NET_UNR_TOS]    = "Network Unreachable for TOS",
+    [ICMP_HOST_UNR_TOS]   = "Host Unreachable for TOS",
+    [ICMP_PKT_FILTERED]   = "Packet filtered",
+    [ICMP_PREC_VIOLATION] = "Precedence violation",
+    [ICMP_PREC_CUTOFF]    = "Precedence cut off"
+};
+
+static const char *net_icmp_redirect_messages[] = 
+{
+    [ICMP_REDIR_NET]    = "Redirect for Network",
+    [ICMP_REDIR_HOST]   = "Redirect for Host",
+    [ICMP_REDIR_NETTOS] = "Redirect for Network with TOS",
+    [ICMP_REDIR_HOSTTOS] = "Redirect for Host with TOS"
+};
+
+static const char *net_icmp_time_messages[] = 
+{
+    [ICMP_EXC_TTL]       = "Time-to-live exceeded",
+    [ICMP_EXC_FRAGTIME]  = "Fragment Reassembly Timeout"
+};