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Userland: Allow ping <hostname> :^)
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parent
696f9c5bc0
commit
4ea625e08b
Notes:
sideshowbarker
2024-07-19 14:59:45 +09:00
Author: https://github.com/awesomekling Commit: https://github.com/SerenityOS/serenity/commit/4ea625e08b4
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@ -1,9 +1,11 @@
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <time.h>
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uint16_t internet_checksum(const void* ptr, size_t count)
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@ -33,6 +35,11 @@ inline void timersub(struct timeval* a, struct timeval* b, struct timeval* resul
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int main(int argc, char** argv)
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{
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if (argc != 2) {
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printf("usage: ping <host>\n");
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return 0;
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}
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int fd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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if (fd < 0) {
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perror("socket");
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@ -46,9 +53,11 @@ int main(int argc, char** argv)
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return 1;
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}
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const char* addr_str = "127.0.0.1";
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if (argc > 1)
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addr_str = argv[1];
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auto* hostent = gethostbyname(argv[1]);
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if (!hostent) {
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printf("Lookup failed for '%s'\n", argv[1]);
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return 1;
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}
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pid_t pid = getpid();
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@ -57,7 +66,7 @@ int main(int argc, char** argv)
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peer_address.sin_family = AF_INET;
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peer_address.sin_port = 0;
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rc = inet_pton(AF_INET, addr_str, &peer_address.sin_addr);
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peer_address.sin_addr.s_addr = *(const in_addr_t*)hostent->h_addr_list[0];
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struct PingPacket {
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struct icmphdr header;
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