zircon/system/uapp/ping/ping.cpp - fuchsia - Git at Google

 // Copyright 2017 The Fuchsia Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <netdb.h>
 #include <netinet/in.h>
 #include <netinet/ip_icmp.h>
 #include <poll.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

 #include <zircon/compiler.h>
 #include <zircon/syscalls.h>

 #define USEC_TO_MSEC(x) (float(x) / 1000.0)

 const int MAX_PAYLOAD_SIZE_BYTES = 1400;

 typedef struct {
     icmphdr hdr;
     uint8_t payload[MAX_PAYLOAD_SIZE_BYTES];
 } __PACKED packet_t;

 struct Options {
     long interval_msec = 1000;
     long payload_size_bytes = 0;
     long count = 3;
     long timeout_msec = 1000;
     const char* host = nullptr;
     long min_payload_size_bytes = 0;

     explicit Options(long min) {
         payload_size_bytes = min;
         min_payload_size_bytes = min;
     }

     void Print() const {
         printf("Count: %ld, ", count);
         printf("Payload size: %ld bytes, ", payload_size_bytes);
         printf("Interval: %ld ms, ", interval_msec);
         printf("Timeout: %ld ms, ", timeout_msec);
         if (host != nullptr) {
             printf("Destination: %s\n", host);
         }
     }

     bool Validate() const {
         if (interval_msec <= 0) {
             fprintf(stderr, "interval must be positive: %ld\n", interval_msec);
             return false;
         }

         if (payload_size_bytes >= MAX_PAYLOAD_SIZE_BYTES) {
             fprintf(stderr, "payload size must be smaller than: %d\n", MAX_PAYLOAD_SIZE_BYTES);
             return false;
         }

         if (payload_size_bytes < min_payload_size_bytes) {
             fprintf(stderr, "payload size must be more than: %ld\n", min_payload_size_bytes);
             return false;
         }

         if (count <= 0) {
             fprintf(stderr, "count must be positive: %ld\n", count);
             return false;
         }

         if (timeout_msec <= 0) {
             fprintf(stderr, "timeout must be positive: %ld\n", timeout_msec);
             return false;
         }

         if (host == nullptr) {
             fprintf(stderr, "destination must be provided\n");
             return false;
         }
         return true;
     }

     int Usage() const {
         fprintf(stderr, "\n\tUsage: ping [ <option>* ] destination\n");
         fprintf(stderr, "\n\tSend ICMP ECHO_REQUEST to a destination. This destination\n");
         fprintf(stderr, "\tmay be a hostname (google.com) or an IP address (8.8.8.8).\n\n");
         fprintf(stderr, "\t-c count: Only send count packets (default = 3)\n");
         fprintf(stderr, "\t-i interval(ms): Time interval between pings (default = 1000)\n");
         fprintf(stderr, "\t-t timeout(ms): Timeout waiting for ping response (default = 1000)\n");
         fprintf(stderr, "\t-s size(bytes): Number of payload bytes (default = %ld, max 1400)\n",
                 payload_size_bytes);
         fprintf(stderr, "\t-h: View this help message\n\n");
         return -1;
     }

     int ParseCommandLine(int argc, char** argv) {
         int opt;
         while ((opt = getopt(argc, argv, "s:c:i:t:h")) != -1) {
             char* endptr = nullptr;
             switch (opt) {
             case 'h':
                 return Usage();
             case 'i':
                 interval_msec = strtol(optarg, &endptr, 10);
                 if (*endptr != '\0') {
                     fprintf(stderr, "-i must be followed by a non-negative integer\n");
                     return Usage();
                 }
                 break;
             case 's':
                 payload_size_bytes = strtol(optarg, &endptr, 10);
                 if (*endptr != '\0') {
                     fprintf(stderr, "-s must be followed by a non-negative integer\n");
                     return Usage();
                 }
                 break;
             case 'c':
                 count = strtol(optarg, &endptr, 10);
                 if (*endptr != '\0') {
                     fprintf(stderr, "-c must be followed by a non-negative integer\n");
                     return Usage();
                 }
                 break;
             case 't':
                 timeout_msec = strtol(optarg, &endptr, 10);
                 if (*endptr != '\0') {
                     fprintf(stderr, "-t must be followed by a non-negative integer\n");
                     return Usage();
                 }
                 break;
             default:
                 return Usage();
             }
         }
         if (optind >= argc) {
             fprintf(stderr, "missing destination\n");
             return Usage();
         }
         host = argv[optind];
         return 0;
     }
 };

 struct PingStatistics {
     uint64_t min_rtt_usec = UINT64_MAX;
     uint64_t max_rtt_usec = 0;
     uint64_t sum_rtt_usec = 0;
     uint16_t num_sent = 0;
     uint16_t num_lost = 0;

     void Update(uint64_t rtt_usec) {
         if (rtt_usec < min_rtt_usec) {
             min_rtt_usec = rtt_usec;
         }
         if (rtt_usec > max_rtt_usec) {
             max_rtt_usec = rtt_usec;
         }
         sum_rtt_usec += rtt_usec;
         num_sent++;
     }

     void Print() const {
         if (num_sent == 0) {
             printf("No echo request sent\n");
             return;
         }
         printf("RTT Min/Max/Avg = [ %.3f / %.3f / %.3f ] ms\n",
                USEC_TO_MSEC(min_rtt_usec),
                USEC_TO_MSEC(max_rtt_usec),
                USEC_TO_MSEC(sum_rtt_usec / num_sent));
     }
 };

 bool ValidateReceivedPacket(const packet_t& sent_packet, size_t sent_packet_size,
                             const packet_t& received_packet, size_t received_packet_size,
                             const Options& options) {
     if (received_packet_size != sent_packet_size) {
         fprintf(stderr, "Incorrect Packet size of received packet: %zu expected %zu\n",
                 received_packet_size, sent_packet_size);
         return false;
     }
     if (received_packet.hdr.type != ICMP_ECHOREPLY) {
         fprintf(stderr, "Incorrect Header type in received packet: %d expected: %d\n",
                 received_packet.hdr.type, ICMP_ECHOREPLY);
         return false;
     }
     if (received_packet.hdr.code != 0) {
         fprintf(stderr, "Incorrect Header code in received packet: %d expected: 0\n",
                 received_packet.hdr.code);
         return false;
     }

     // Do not match identifier.
     // RFC 792 and RFC 1122 3.2.2.6 require the echo reply carries the same value
     // from the echo request, implementations honor that. But the requester side
     // NAT may rewrite the identifier on echo request, which makes impossible
     // for the host to match.

     if (received_packet.hdr.un.echo.sequence != sent_packet.hdr.un.echo.sequence) {
         fprintf(stderr, "Incorrect Header sequence in received packet: %d expected: %d\n",
                 received_packet.hdr.un.echo.sequence, sent_packet.hdr.un.echo.sequence);
         return false;
     }
     if (memcmp(received_packet.payload, sent_packet.payload, options.payload_size_bytes) != 0) {
         fprintf(stderr, "Incorrect Payload content in received packet\n");
         return false;
     }
     return true;
 }

 int main(int argc, char** argv) {

     constexpr char ping_message[] = "This is an echo message!";
     long message_size = static_cast<long>(strlen(ping_message) + 1);
     Options options(message_size);
     PingStatistics stats;

     if (options.ParseCommandLine(argc, argv) != 0) {
         return -1;
     }

     if (!options.Validate()) {
         return options.Usage();
     }

     options.Print();

     int s = socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP);
     if (s < 0) {
         fprintf(stderr, "Could not acquire ICMP socket: %d\n", errno);
         return -1;
     }

     struct addrinfo hints;
     memset(&hints, 0, sizeof(hints));
     hints.ai_family = AF_UNSPEC;
     hints.ai_socktype = SOCK_DGRAM;
     hints.ai_flags = 0;
     hints.ai_protocol = IPPROTO_ICMP;
     struct addrinfo* info;
     if (getaddrinfo(options.host, NULL, &hints, &info)) {
         fprintf(stderr, "ping: unknown host %s\n", options.host);
         return -1;
     }

     struct sockaddr* saddr = info->ai_addr;
     char buf[256];
     if (saddr->sa_family == AF_INET) {
         struct sockaddr_in* iaddr = reinterpret_cast<struct sockaddr_in*>(saddr);
         inet_ntop(saddr->sa_family, &iaddr->sin_addr, buf, sizeof(buf));
     } else {
         struct sockaddr_in6* iaddr = reinterpret_cast<struct sockaddr_in6*>(saddr);
         inet_ntop(saddr->sa_family, &iaddr->sin6_addr, buf, sizeof(buf));
     }

     printf("PING %s (%s)\n", options.host, buf);

     uint16_t sequence = 1;
     packet_t packet, received_packet;
     ssize_t r = 0;
     ssize_t sent_packet_size = 0;
     const zx_ticks_t ticks_per_usec = zx_ticks_per_second() / 1000000;

     while (options.count-- > 0) {
         memset(&packet, 0, sizeof(packet));
         packet.hdr.type = ICMP_ECHO;
         packet.hdr.code = 0;
         packet.hdr.un.echo.id = 0;
         packet.hdr.un.echo.sequence = htons(sequence++);
         strcpy(reinterpret_cast<char*>(packet.payload), ping_message);
         // Netstack will overwrite the checksum
         zx_ticks_t before = zx_ticks_get();
         sent_packet_size = sizeof(packet.hdr) + options.payload_size_bytes;
         r = sendto(s, &packet, sent_packet_size, 0, saddr, sizeof(*saddr));
         if (r < 0) {
             fprintf(stderr, "ping: Could not send packet\n");
             return -1;
         }

         struct pollfd fd;
         fd.fd = s;
         fd.events = POLLIN;
         switch (poll(&fd, 1, static_cast<int>(options.timeout_msec))) {
         case 1:
             if (fd.revents & POLLIN) {
                 r = recvfrom(s, &received_packet, sizeof(received_packet), 0, NULL, NULL);
                 if (!ValidateReceivedPacket(packet, sent_packet_size, received_packet, r, options)) {
                     fprintf(stderr, "ping: Received packet didn't match sent packet: %d\n",
                             packet.hdr.un.echo.sequence);
                 }
                 break;
             } else {
                 fprintf(stderr, "ping: Spurious wakeup from poll\n");
                 r = -1;
                 break;
             }
         case 0:
             fprintf(stderr, "ping: Timeout after %d ms\n", static_cast<int>(options.timeout_msec));
             __FALLTHROUGH;
         default:
             r = -1;
         }

         if (r < 0) {
             fprintf(stderr, "ping: Could not read result of ping\n");
             return -1;
         }
         zx_ticks_t after = zx_ticks_get();
         int seq = ntohs(packet.hdr.un.echo.sequence);
         uint64_t usec = (after - before) / ticks_per_usec;
         stats.Update(usec);
         printf("%" PRIu64 " bytes from %s : icmp_seq=%d rtt=%.3f ms\n",
                r, options.host, seq, (float)usec / 1000.0);
         if (options.count > 0) {
             usleep(static_cast<unsigned int>(options.interval_msec * 1000));
         }
     }
     freeaddrinfo(info);
     stats.Print();
     close(s);
     return 0;
 }
	// Copyright 2017 The Fuchsia Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include <arpa/inet.h>
	#include <errno.h>
	#include <fcntl.h>
	#include <limits.h>
	#include <netdb.h>
	#include <netinet/in.h>
	#include <netinet/ip_icmp.h>
	#include <poll.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>

	#include <zircon/compiler.h>
	#include <zircon/syscalls.h>

	#define USEC_TO_MSEC(x) (float(x) / 1000.0)

	const int MAX_PAYLOAD_SIZE_BYTES = 1400;

	typedef struct {
	icmphdr hdr;
	uint8_t payload[MAX_PAYLOAD_SIZE_BYTES];
	} __PACKED packet_t;

	struct Options {
	long interval_msec = 1000;
	long payload_size_bytes = 0;
	long count = 3;
	long timeout_msec = 1000;
	const char* host = nullptr;
	long min_payload_size_bytes = 0;

	explicit Options(long min) {
	payload_size_bytes = min;
	min_payload_size_bytes = min;
	}

	void Print() const {
	printf("Count: %ld, ", count);
	printf("Payload size: %ld bytes, ", payload_size_bytes);
	printf("Interval: %ld ms, ", interval_msec);
	printf("Timeout: %ld ms, ", timeout_msec);
	if (host != nullptr) {
	printf("Destination: %s\n", host);
	}
	}

	bool Validate() const {
	if (interval_msec <= 0) {
	fprintf(stderr, "interval must be positive: %ld\n", interval_msec);
	return false;
	}

	if (payload_size_bytes >= MAX_PAYLOAD_SIZE_BYTES) {
	fprintf(stderr, "payload size must be smaller than: %d\n", MAX_PAYLOAD_SIZE_BYTES);
	return false;
	}

	if (payload_size_bytes < min_payload_size_bytes) {
	fprintf(stderr, "payload size must be more than: %ld\n", min_payload_size_bytes);
	return false;
	}

	if (count <= 0) {
	fprintf(stderr, "count must be positive: %ld\n", count);
	return false;
	}

	if (timeout_msec <= 0) {
	fprintf(stderr, "timeout must be positive: %ld\n", timeout_msec);
	return false;
	}

	if (host == nullptr) {
	fprintf(stderr, "destination must be provided\n");
	return false;
	}
	return true;
	}

	int Usage() const {
	fprintf(stderr, "\n\tUsage: ping [ <option>* ] destination\n");
	fprintf(stderr, "\n\tSend ICMP ECHO_REQUEST to a destination. This destination\n");
	fprintf(stderr, "\tmay be a hostname (google.com) or an IP address (8.8.8.8).\n\n");
	fprintf(stderr, "\t-c count: Only send count packets (default = 3)\n");
	fprintf(stderr, "\t-i interval(ms): Time interval between pings (default = 1000)\n");
	fprintf(stderr, "\t-t timeout(ms): Timeout waiting for ping response (default = 1000)\n");
	fprintf(stderr, "\t-s size(bytes): Number of payload bytes (default = %ld, max 1400)\n",
	payload_size_bytes);
	fprintf(stderr, "\t-h: View this help message\n\n");
	return -1;
	}

	int ParseCommandLine(int argc, char** argv) {
	int opt;
	while ((opt = getopt(argc, argv, "s:c:i:t:h")) != -1) {
	char* endptr = nullptr;
	switch (opt) {
	case 'h':
	return Usage();
	case 'i':
	interval_msec = strtol(optarg, &endptr, 10);
	if (*endptr != '\0') {
	fprintf(stderr, "-i must be followed by a non-negative integer\n");
	return Usage();
	}
	break;
	case 's':
	payload_size_bytes = strtol(optarg, &endptr, 10);
	if (*endptr != '\0') {
	fprintf(stderr, "-s must be followed by a non-negative integer\n");
	return Usage();
	}
	break;
	case 'c':
	count = strtol(optarg, &endptr, 10);
	if (*endptr != '\0') {
	fprintf(stderr, "-c must be followed by a non-negative integer\n");
	return Usage();
	}
	break;
	case 't':
	timeout_msec = strtol(optarg, &endptr, 10);
	if (*endptr != '\0') {
	fprintf(stderr, "-t must be followed by a non-negative integer\n");
	return Usage();
	}
	break;
	default:
	return Usage();
	}
	}
	if (optind >= argc) {
	fprintf(stderr, "missing destination\n");
	return Usage();
	}
	host = argv[optind];
	return 0;
	}
	};

	struct PingStatistics {
	uint64_t min_rtt_usec = UINT64_MAX;
	uint64_t max_rtt_usec = 0;
	uint64_t sum_rtt_usec = 0;
	uint16_t num_sent = 0;
	uint16_t num_lost = 0;

	void Update(uint64_t rtt_usec) {
	if (rtt_usec < min_rtt_usec) {
	min_rtt_usec = rtt_usec;
	}
	if (rtt_usec > max_rtt_usec) {
	max_rtt_usec = rtt_usec;
	}
	sum_rtt_usec += rtt_usec;
	num_sent++;
	}

	void Print() const {
	if (num_sent == 0) {
	printf("No echo request sent\n");
	return;
	}
	printf("RTT Min/Max/Avg = [ %.3f / %.3f / %.3f ] ms\n",
	USEC_TO_MSEC(min_rtt_usec),
	USEC_TO_MSEC(max_rtt_usec),
	USEC_TO_MSEC(sum_rtt_usec / num_sent));
	}
	};

	bool ValidateReceivedPacket(const packet_t& sent_packet, size_t sent_packet_size,
	const packet_t& received_packet, size_t received_packet_size,
	const Options& options) {
	if (received_packet_size != sent_packet_size) {
	fprintf(stderr, "Incorrect Packet size of received packet: %zu expected %zu\n",
	received_packet_size, sent_packet_size);
	return false;
	}
	if (received_packet.hdr.type != ICMP_ECHOREPLY) {
	fprintf(stderr, "Incorrect Header type in received packet: %d expected: %d\n",
	received_packet.hdr.type, ICMP_ECHOREPLY);
	return false;
	}
	if (received_packet.hdr.code != 0) {
	fprintf(stderr, "Incorrect Header code in received packet: %d expected: 0\n",
	received_packet.hdr.code);
	return false;
	}

	// Do not match identifier.
	// RFC 792 and RFC 1122 3.2.2.6 require the echo reply carries the same value
	// from the echo request, implementations honor that. But the requester side
	// NAT may rewrite the identifier on echo request, which makes impossible
	// for the host to match.

	if (received_packet.hdr.un.echo.sequence != sent_packet.hdr.un.echo.sequence) {
	fprintf(stderr, "Incorrect Header sequence in received packet: %d expected: %d\n",
	received_packet.hdr.un.echo.sequence, sent_packet.hdr.un.echo.sequence);
	return false;
	}
	if (memcmp(received_packet.payload, sent_packet.payload, options.payload_size_bytes) != 0) {
	fprintf(stderr, "Incorrect Payload content in received packet\n");
	return false;
	}
	return true;
	}

	int main(int argc, char** argv) {

	constexpr char ping_message[] = "This is an echo message!";
	long message_size = static_cast<long>(strlen(ping_message) + 1);
	Options options(message_size);
	PingStatistics stats;

	if (options.ParseCommandLine(argc, argv) != 0) {
	return -1;
	}

	if (!options.Validate()) {
	return options.Usage();
	}

	options.Print();

	int s = socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP);
	if (s < 0) {
	fprintf(stderr, "Could not acquire ICMP socket: %d\n", errno);
	return -1;
	}

	struct addrinfo hints;
	memset(&hints, 0, sizeof(hints));
	hints.ai_family = AF_UNSPEC;
	hints.ai_socktype = SOCK_DGRAM;
	hints.ai_flags = 0;
	hints.ai_protocol = IPPROTO_ICMP;
	struct addrinfo* info;
	if (getaddrinfo(options.host, NULL, &hints, &info)) {
	fprintf(stderr, "ping: unknown host %s\n", options.host);
	return -1;
	}

	struct sockaddr* saddr = info->ai_addr;
	char buf[256];
	if (saddr->sa_family == AF_INET) {
	struct sockaddr_in* iaddr = reinterpret_cast<struct sockaddr_in*>(saddr);
	inet_ntop(saddr->sa_family, &iaddr->sin_addr, buf, sizeof(buf));
	} else {
	struct sockaddr_in6* iaddr = reinterpret_cast<struct sockaddr_in6*>(saddr);
	inet_ntop(saddr->sa_family, &iaddr->sin6_addr, buf, sizeof(buf));
	}

	printf("PING %s (%s)\n", options.host, buf);

	uint16_t sequence = 1;
	packet_t packet, received_packet;
	ssize_t r = 0;
	ssize_t sent_packet_size = 0;
	const zx_ticks_t ticks_per_usec = zx_ticks_per_second() / 1000000;

	while (options.count-- > 0) {
	memset(&packet, 0, sizeof(packet));
	packet.hdr.type = ICMP_ECHO;
	packet.hdr.code = 0;
	packet.hdr.un.echo.id = 0;
	packet.hdr.un.echo.sequence = htons(sequence++);
	strcpy(reinterpret_cast<char*>(packet.payload), ping_message);
	// Netstack will overwrite the checksum
	zx_ticks_t before = zx_ticks_get();
	sent_packet_size = sizeof(packet.hdr) + options.payload_size_bytes;
	r = sendto(s, &packet, sent_packet_size, 0, saddr, sizeof(*saddr));
	if (r < 0) {
	fprintf(stderr, "ping: Could not send packet\n");
	return -1;
	}

	struct pollfd fd;
	fd.fd = s;
	fd.events = POLLIN;
	switch (poll(&fd, 1, static_cast<int>(options.timeout_msec))) {
	case 1:
	if (fd.revents & POLLIN) {
	r = recvfrom(s, &received_packet, sizeof(received_packet), 0, NULL, NULL);
	if (!ValidateReceivedPacket(packet, sent_packet_size, received_packet, r, options)) {
	fprintf(stderr, "ping: Received packet didn't match sent packet: %d\n",
	packet.hdr.un.echo.sequence);
	}
	break;
	} else {
	fprintf(stderr, "ping: Spurious wakeup from poll\n");
	r = -1;
	break;
	}
	case 0:
	fprintf(stderr, "ping: Timeout after %d ms\n", static_cast<int>(options.timeout_msec));
	__FALLTHROUGH;
	default:
	r = -1;
	}

	if (r < 0) {
	fprintf(stderr, "ping: Could not read result of ping\n");
	return -1;
	}
	zx_ticks_t after = zx_ticks_get();
	int seq = ntohs(packet.hdr.un.echo.sequence);
	uint64_t usec = (after - before) / ticks_per_usec;
	stats.Update(usec);
	printf("%" PRIu64 " bytes from %s : icmp_seq=%d rtt=%.3f ms\n",
	r, options.host, seq, (float)usec / 1000.0);
	if (options.count > 0) {
	usleep(static_cast<unsigned int>(options.interval_msec * 1000));
	}
	}
	freeaddrinfo(info);
	stats.Print();
	close(s);
	return 0;
	}