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authorErik Andersen2000-02-08 19:58:47 +0000
committerErik Andersen2000-02-08 19:58:47 +0000
commite49d5ecbbe51718fa925b6890a735e5937cc2aa2 (patch)
treec90bda10731ad9333ce3b404f993354c9fc104b8 /networking
parentc0bf817bbc5c7867fbe8fb76d5c39f8ee802692f (diff)
downloadbusybox-e49d5ecbbe51718fa925b6890a735e5937cc2aa2.zip
busybox-e49d5ecbbe51718fa925b6890a735e5937cc2aa2.tar.gz
Some formatting updates (ran the code through indent)
-Erik
Diffstat (limited to 'networking')
-rw-r--r--networking/hostname.c193
-rw-r--r--networking/nslookup.c185
-rw-r--r--networking/ping.c618
3 files changed, 511 insertions, 485 deletions
diff --git a/networking/hostname.c b/networking/hostname.c
index 68a5609..8cc334d 100644
--- a/networking/hostname.c
+++ b/networking/hostname.c
@@ -1,5 +1,6 @@
+/* vi: set sw=4 ts=4: */
/*
- * $Id: hostname.c,v 1.6 2000/02/07 05:29:42 erik Exp $
+ * $Id: hostname.c,v 1.7 2000/02/08 19:58:47 erik Exp $
* Mini hostname implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
@@ -29,110 +30,116 @@
#include <unistd.h>
#include <stdio.h>
-static const char* hostname_usage =
-"hostname [OPTION] {hostname | -F file}\n\n"
-"Get or set the hostname or DNS domain name. If a hostname is given\n"
-"(or a file with the -F parameter), the host name will be set.\n\n"
-"Options:\n"
-"\t-s\t\tShort\n"
-"\t-i\t\tAddresses for the hostname\n"
-"\t-d\t\tDNS domain name\n"
-"\t-F FILE\t\tUse the contents of FILE to specify the hostname\n";
+static const char *hostname_usage =
+ "hostname [OPTION] {hostname | -F file}\n\n"
+ "Get or set the hostname or DNS domain name. If a hostname is given\n"
+ "(or a file with the -F parameter), the host name will be set.\n\n"
+ "Options:\n"
+ "\t-s\t\tShort\n"
+
+ "\t-i\t\tAddresses for the hostname\n"
+ "\t-d\t\tDNS domain name\n"
+ "\t-F FILE\t\tUse the contents of FILE to specify the hostname\n";
void do_sethostname(char *s, int isfile)
{
- FILE *f;
- char buf[255];
-
- if (!s) return;
- if (!isfile) {
- if (sethostname(s, strlen(s)) < 0) {
- if (errno == EPERM)
- fprintf(stderr, "hostname: you must be root to change the hostname\n");
- else
- perror("sethostname");
- exit(1);
- }
- } else {
- if ((f = fopen(s, "r")) == NULL) {
- perror(s);
- exit(1);
+ FILE *f;
+ char buf[255];
+
+ if (!s)
+ return;
+ if (!isfile) {
+ if (sethostname(s, strlen(s)) < 0) {
+ if (errno == EPERM)
+ fprintf(stderr,
+ "hostname: you must be root to change the hostname\n");
+ else
+ perror("sethostname");
+ exit(1);
+ }
} else {
- fgets(buf, 255, f);
- fclose(f);
- if (buf[strlen(buf)-1] == '\n') buf[strlen(buf)-1] = 0;
- if (sethostname(buf, strlen(buf)) < 0) {
- perror("sethostname");
- exit(1);
- }
+ if ((f = fopen(s, "r")) == NULL) {
+ perror(s);
+ exit(1);
+ } else {
+ fgets(buf, 255, f);
+ fclose(f);
+ if (buf[strlen(buf) - 1] == '\n')
+ buf[strlen(buf) - 1] = 0;
+ if (sethostname(buf, strlen(buf)) < 0) {
+ perror("sethostname");
+ exit(1);
+ }
+ }
}
- }
}
int hostname_main(int argc, char **argv)
{
- int opt_short = 0;
- int opt_domain = 0;
- int opt_ip = 0;
- struct hostent *h;
- char *filename = NULL;
- char buf[255];
- char *s = NULL;
-
- if (argc < 1) usage(hostname_usage);
+ int opt_short = 0;
+ int opt_domain = 0;
+ int opt_ip = 0;
+ struct hostent *h;
+ char *filename = NULL;
+ char buf[255];
+ char *s = NULL;
- while (--argc > 0 && **(++argv) == '-') {
- while (*(++(*argv))) {
- switch (**argv) {
- case 's':
- opt_short = 1;
- break;
- case 'i':
- opt_ip = 1;
- break;
- case 'd':
- opt_domain = 1;
- break;
- case 'F':
- filename = optarg;
- if (--argc == 0) {
- usage(hostname_usage);
- }
- filename = *(++argv);
- break;
- default:
+ if (argc < 1)
usage(hostname_usage);
- }
- if (filename!=NULL)
- break;
+
+ while (--argc > 0 && **(++argv) == '-') {
+ while (*(++(*argv))) {
+ switch (**argv) {
+ case 's':
+ opt_short = 1;
+ break;
+ case 'i':
+ opt_ip = 1;
+ break;
+ case 'd':
+ opt_domain = 1;
+ break;
+ case 'F':
+ filename = optarg;
+ if (--argc == 0) {
+ usage(hostname_usage);
+ }
+ filename = *(++argv);
+ break;
+ default:
+ usage(hostname_usage);
+ }
+ if (filename != NULL)
+ break;
+ }
}
- }
- if (argc >= 1) {
- do_sethostname(*argv, 0);
- } else if (filename!=NULL) {
- do_sethostname(filename, 1);
- } else {
- gethostname(buf, 255);
- if (opt_short) {
- s = strchr(buf, '.');
- if (!s) s = buf; *s = 0;
- printf("%s\n", buf);
- } else if (opt_domain) {
- s = strchr(buf, '.');
- printf("%s\n", (s ? s+1 : ""));
- } else if (opt_ip) {
- h = gethostbyname(buf);
- if (!h) {
- printf("Host not found\n");
- exit(1);
- }
- printf("%s\n", inet_ntoa(*(struct in_addr *)(h->h_addr)));
- } else {
- printf("%s\n", buf);
- }
- }
- exit( 0);
+ if (argc >= 1) {
+ do_sethostname(*argv, 0);
+ } else if (filename != NULL) {
+ do_sethostname(filename, 1);
+ } else {
+ gethostname(buf, 255);
+ if (opt_short) {
+ s = strchr(buf, '.');
+ if (!s)
+ s = buf;
+ *s = 0;
+ printf("%s\n", buf);
+ } else if (opt_domain) {
+ s = strchr(buf, '.');
+ printf("%s\n", (s ? s + 1 : ""));
+ } else if (opt_ip) {
+ h = gethostbyname(buf);
+ if (!h) {
+ printf("Host not found\n");
+ exit(1);
+ }
+ printf("%s\n", inet_ntoa(*(struct in_addr *) (h->h_addr)));
+ } else {
+ printf("%s\n", buf);
+ }
+ }
+ exit(0);
}
-
diff --git a/networking/nslookup.c b/networking/nslookup.c
index 969d0b1..ffa7201 100644
--- a/networking/nslookup.c
+++ b/networking/nslookup.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
/*
* Mini nslookup implementation for busybox
*
@@ -41,148 +42,136 @@
| + find out how the real nslookup gets the default name server
*/
-static const char nslookup_usage[] =
- "nslookup [HOST]\n\n"
-;
+static const char nslookup_usage[] = "nslookup [HOST]\n\n";
/* I have to see how the real nslookup does this.
* I could dig through /etc/resolv.conf, but is there a
* better (programatic) way?
*/
-static void
-server_fprint(FILE *dst)
+static void server_fprint(FILE * dst)
{
- fprintf(dst, "Server: %s\n", "something");
- fprintf(dst, "Address: %s\n\n", "something");
+ fprintf(dst, "Server: %s\n", "something");
+ fprintf(dst, "Address: %s\n\n", "something");
}
/* only works for IPv4 */
-static int
-addr_fprint(char *addr, FILE *dst)
+static int addr_fprint(char *addr, FILE * dst)
{
- uint8_t split[4];
- uint32_t ip;
- uint32_t *x = (uint32_t *) addr;
-
- ip = ntohl(*x);
- split[0] = (ip & 0xff000000) >> 24;
- split[1] = (ip & 0x00ff0000) >> 16;
- split[2] = (ip & 0x0000ff00) >> 8;
- split[3] = (ip & 0x000000ff);
- fprintf (
- dst, "%d.%d.%d.%d",
- split[0], split[1], split[2], split[3]
- );
- return 0;
+ uint8_t split[4];
+ uint32_t ip;
+ uint32_t *x = (uint32_t *) addr;
+
+ ip = ntohl(*x);
+ split[0] = (ip & 0xff000000) >> 24;
+ split[1] = (ip & 0x00ff0000) >> 16;
+ split[2] = (ip & 0x0000ff00) >> 8;
+ split[3] = (ip & 0x000000ff);
+ fprintf(dst, "%d.%d.%d.%d", split[0], split[1], split[2], split[3]
+ );
+ return 0;
}
/* changes a c-string matching the perl regex \d+\.\d+\.\d+\.\d+
* into a uint32_t
*/
-static uint32_t
-str_to_addr(const char *addr)
+static uint32_t str_to_addr(const char *addr)
{
- uint32_t split[4];
- uint32_t ip;
+ uint32_t split[4];
+ uint32_t ip;
- sscanf(addr, "%d.%d.%d.%d",
- &split[0], &split[1], &split[2], &split[3]);
+ sscanf(addr, "%d.%d.%d.%d",
+ &split[0], &split[1], &split[2], &split[3]);
- /* assuming sscanf worked */
- ip = (split[0] << 24) |
- (split[1] << 16) |
- (split[2] << 8) |
- (split[3]);
+ /* assuming sscanf worked */
+ ip = (split[0] << 24) |
+ (split[1] << 16) | (split[2] << 8) | (split[3]);
- return htonl(ip);
+ return htonl(ip);
}
/* takes the NULL-terminated array h_addr_list, and
* prints its contents appropriately
*/
-static int
-addr_list_fprint(char **h_addr_list, FILE *dst)
+static int addr_list_fprint(char **h_addr_list, FILE * dst)
{
- int i, j;
- char *addr_string = (h_addr_list[1])
- ? "Addresses"
- : "Address";
-
- fprintf(dst, "%s: ", addr_string);
- for (i = 0, j = 0; h_addr_list[i]; i++, j++) {
- addr_fprint(h_addr_list[i], dst);
-
- /* real nslookup does this */
- if (j == 4) {
- if (h_addr_list[i+1]) {
- fprintf(dst, "\n ");
- }
- j = 0;
- } else {
- if (h_addr_list[i+1]) {
- fprintf(dst, ", ");
- }
- }
+ int i, j;
+ char *addr_string = (h_addr_list[1])
+ ? "Addresses" : "Address";
+
+ fprintf(dst, "%s: ", addr_string);
+ for (i = 0, j = 0; h_addr_list[i]; i++, j++) {
+ addr_fprint(h_addr_list[i], dst);
+
+ /* real nslookup does this */
+ if (j == 4) {
+ if (h_addr_list[i + 1]) {
+ fprintf(dst, "\n ");
+ }
+ j = 0;
+ } else {
+ if (h_addr_list[i + 1]) {
+ fprintf(dst, ", ");
+ }
+ }
- }
- fprintf(dst,"\n");
- return 0;
+ }
+ fprintf(dst, "\n");
+ return 0;
}
/* gethostbyaddr wrapper */
-static struct hostent *
-gethostbyaddr_wrapper(const char *address)
+static struct hostent *gethostbyaddr_wrapper(const char *address)
{
- struct in_addr addr;
+ struct in_addr addr;
- addr.s_addr = str_to_addr(address);
- return gethostbyaddr((char *) &addr, 4, AF_INET); /* IPv4 only for now */
+ addr.s_addr = str_to_addr(address);
+ return gethostbyaddr((char *) &addr, 4, AF_INET); /* IPv4 only for now */
}
/* print the results as nslookup would */
-static struct hostent *
-hostent_fprint(struct hostent *host, FILE *dst)
+static struct hostent *hostent_fprint(struct hostent *host, FILE * dst)
{
- if (host) {
- fprintf(dst, "Name: %s\n", host->h_name);
- addr_list_fprint(host->h_addr_list, dst);
- } else {
- fprintf(dst, "*** %s\n", hstrerror(h_errno));
- }
- return host;
+ if (host) {
+ fprintf(dst, "Name: %s\n", host->h_name);
+ addr_list_fprint(host->h_addr_list, dst);
+ } else {
+ fprintf(dst, "*** %s\n", hstrerror(h_errno));
+ }
+ return host;
}
/* naive function to check whether char *s is an ip address */
-static int
-is_ip_address(const char *s)
+static int is_ip_address(const char *s)
{
- while (*s) {
- if ((isdigit(*s)) || (*s == '.')) { s++; continue; }
- return 0;
- }
- return 1;
+ while (*s) {
+ if ((isdigit(*s)) || (*s == '.')) {
+ s++;
+ continue;
+ }
+ return 0;
+ }
+ return 1;
}
/* ________________________________________________________________________ */
-int
-nslookup_main(int argc, char **argv)
+int nslookup_main(int argc, char **argv)
{
- struct hostent *host;
-
- if (argc < 2) {
- usage(nslookup_usage);
- }
-
- server_fprint(stdout);
- if (is_ip_address(argv[1])) {
- host = gethostbyaddr_wrapper(argv[1]);
- } else {
- host = gethostbyname(argv[1]);
- }
- hostent_fprint(host, stdout);
- return 0;
+ struct hostent *host;
+
+ if (argc < 2) {
+ usage(nslookup_usage);
+ }
+
+ server_fprint(stdout);
+ if (is_ip_address(argv[1])) {
+ host = gethostbyaddr_wrapper(argv[1]);
+ } else {
+ host = gethostbyname(argv[1]);
+ }
+ hostent_fprint(host, stdout);
+ return 0;
}
-/* $Id: nslookup.c,v 1.3 2000/02/07 05:29:42 erik Exp $ */
+/* $Id: nslookup.c,v 1.4 2000/02/08 19:58:47 erik Exp $ */
diff --git a/networking/ping.c b/networking/ping.c
index 3ffbdc5..c9cf5ff 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -1,5 +1,6 @@
+/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.10 2000/02/07 05:29:42 erik Exp $
+ * $Id: ping.c,v 1.11 2000/02/08 19:58:47 erik Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
@@ -53,7 +54,7 @@
#define MAXPACKET 65468
#define MAX_DUP_CHK (8 * 128)
#define MAXWAIT 10
-#define PINGINTERVAL 1 /* second */
+#define PINGINTERVAL 1 /* second */
#define O_QUIET (1 << 0)
@@ -66,118 +67,124 @@
/* common routines */
static int in_cksum(unsigned short *buf, int sz)
{
- int nleft = sz;
- int sum = 0;
- unsigned short *w = buf;
- unsigned short ans = 0;
-
- while (nleft > 1) {
- sum += *w++;
- nleft -= 2;
- }
-
- if (nleft == 1) {
- *(unsigned char *)(&ans) = *(unsigned char *)w;
- sum += ans;
- }
-
- sum = (sum >> 16) + (sum & 0xFFFF);
- sum += (sum >> 16);
- ans = ~sum;
- return(ans);
-}
+ int nleft = sz;
+ int sum = 0;
+ unsigned short *w = buf;
+ unsigned short ans = 0;
+
+ while (nleft > 1) {
+ sum += *w++;
+ nleft -= 2;
+ }
+
+ if (nleft == 1) {
+ *(unsigned char *) (&ans) = *(unsigned char *) w;
+ sum += ans;
+ }
+
+ sum = (sum >> 16) + (sum & 0xFFFF);
+ sum += (sum >> 16);
+ ans = ~sum;
+ return (ans);
+}
/* simple version */
#ifdef BB_SIMPLE_PING
-static const char* ping_usage = "ping host\n\n";
+static const char *ping_usage = "ping host\n\n";
-static char* hostname = NULL;
+static char *hostname = NULL;
static void noresp(int ign)
{
- printf("No response from %s\n", hostname);
- exit(0);
+ printf("No response from %s\n", hostname);
+ exit(0);
}
static int ping(const char *host)
{
- struct hostent *h;
- struct sockaddr_in pingaddr;
- struct icmp *pkt;
- int pingsock, c;
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
-
- if ((pingsock = socket(AF_INET, SOCK_RAW, 1)) < 0) { /* 1 == ICMP */
- perror("ping");
- exit(1);
- }
-
- /* drop root privs if running setuid */
- setuid(getuid());
-
- memset(&pingaddr, 0, sizeof(struct sockaddr_in));
- pingaddr.sin_family = AF_INET;
- if (!(h = gethostbyname(host))) {
- fprintf(stderr, "ping: unknown host %s\n", host);
- exit(1);
- }
- memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
- hostname = h->h_name;
-
- pkt = (struct icmp *)packet;
- memset(pkt, 0, sizeof(packet));
- pkt->icmp_type = ICMP_ECHO;
- pkt->icmp_cksum = in_cksum((unsigned short *)pkt, sizeof(packet));
-
- c = sendto(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *)&pingaddr, sizeof(struct sockaddr_in));
-
- if (c < 0 || c != sizeof(packet)) {
- if (c < 0) perror("ping");
- fprintf(stderr, "ping: write incomplete\n");
- exit(1);
- }
-
- signal(SIGALRM, noresp);
- alarm(5); /* give the host 5000ms to respond */
- /* listen for replies */
- while (1) {
- struct sockaddr_in from;
- size_t fromlen = sizeof(from);
-
- if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *)&from, &fromlen)) < 0) {
- if (errno == EINTR) continue;
- perror("ping");
- continue;
+ struct hostent *h;
+ struct sockaddr_in pingaddr;
+ struct icmp *pkt;
+ int pingsock, c;
+ char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+
+ if ((pingsock = socket(AF_INET, SOCK_RAW, 1)) < 0) { /* 1 == ICMP */
+ perror("ping");
+ exit(1);
+ }
+
+ /* drop root privs if running setuid */
+ setuid(getuid());
+
+ memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+ pingaddr.sin_family = AF_INET;
+ if (!(h = gethostbyname(host))) {
+ fprintf(stderr, "ping: unknown host %s\n", host);
+ exit(1);
+ }
+ memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
+ hostname = h->h_name;
+
+ pkt = (struct icmp *) packet;
+ memset(pkt, 0, sizeof(packet));
+ pkt->icmp_type = ICMP_ECHO;
+ pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
+
+ c = sendto(pingsock, packet, sizeof(packet), 0,
+ (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+
+ if (c < 0 || c != sizeof(packet)) {
+ if (c < 0)
+ perror("ping");
+ fprintf(stderr, "ping: write incomplete\n");
+ exit(1);
+ }
+
+ signal(SIGALRM, noresp);
+ alarm(5); /* give the host 5000ms to respond */
+ /* listen for replies */
+ while (1) {
+ struct sockaddr_in from;
+ size_t fromlen = sizeof(from);
+
+ if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
+ (struct sockaddr *) &from, &fromlen)) < 0) {
+ if (errno == EINTR)
+ continue;
+ perror("ping");
+ continue;
+ }
+ if (c >= 76) { /* ip + icmp */
+ struct iphdr *iphdr = (struct iphdr *) packet;
+
+ pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */
+ if (pkt->icmp_type == ICMP_ECHOREPLY)
+ break;
+ }
}
- if (c >= 76) { /* ip + icmp */
- struct iphdr *iphdr = (struct iphdr *)packet;
- pkt = (struct icmp *)(packet + (iphdr->ihl << 2)); /* skip ip hdr */
- if (pkt->icmp_type == ICMP_ECHOREPLY) break;
- }
- }
- printf("%s is alive!\n", hostname);
- return(TRUE);
+ printf("%s is alive!\n", hostname);
+ return (TRUE);
}
extern int ping_main(int argc, char **argv)
{
- argc--;
- argv++;
- if (argc < 1) usage(ping_usage);
- ping(*argv);
- exit(TRUE);
+ argc--;
+ argv++;
+ if (argc < 1)
+ usage(ping_usage);
+ ping(*argv);
+ exit(TRUE);
}
-#else
+#else
/* full(er) version */
-static const char* ping_usage = "ping [OPTION]... host\n\n"
-"Send ICMP ECHO_REQUEST packets to network hosts.\n\n"
-"Options:\n"
-"\t-q\t\tQuiet mode, only displays output at start"
-"\t\t\tand when finished.\n"
-"\t-c COUNT\tSend only COUNT pings.\n";
+static const char *ping_usage = "ping [OPTION]... host\n\n"
+ "Send ICMP ECHO_REQUEST packets to network hosts.\n\n"
+ "Options:\n"
+ "\t-q\t\tQuiet mode, only displays output at start"
+
+ "\t\t\tand when finished.\n" "\t-c COUNT\tSend only COUNT pings.\n";
static char *hostname = NULL;
static struct sockaddr_in pingaddr;
@@ -196,224 +203,247 @@ static void ping(char *);
/**************************************************************************/
-static void pingstats(int ign) {
- signal(SIGINT, SIG_IGN);
-
- printf("\n--- %s ping statistics ---\n", hostname);
- printf("%ld packets transmitted, ", ntransmitted);
- printf("%ld packets received, ", nreceived);
- if (nrepeats)
- printf("%ld duplicates, ", nrepeats);
- if (ntransmitted)
- printf("%ld%% packet loss\n",
- (ntransmitted - nreceived)*100/ntransmitted);
- if (nreceived)
- printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
- tmin/10, tmin%10,
- (tsum/(nreceived+nrepeats))/10,
- (tsum/(nreceived+nrepeats))%10,
- tmax/10, tmax%10);
- exit(0);
+static void pingstats(int ign)
+{
+ signal(SIGINT, SIG_IGN);
+
+ printf("\n--- %s ping statistics ---\n", hostname);
+ printf("%ld packets transmitted, ", ntransmitted);
+ printf("%ld packets received, ", nreceived);
+ if (nrepeats)
+ printf("%ld duplicates, ", nrepeats);
+ if (ntransmitted)
+ printf("%ld%% packet loss\n",
+ (ntransmitted - nreceived) * 100 / ntransmitted);
+ if (nreceived)
+ printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
+ tmin / 10, tmin % 10,
+ (tsum / (nreceived + nrepeats)) / 10,
+ (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
+ exit(0);
}
static void sendping(int ign)
{
- struct icmp *pkt;
- int i;
- char packet[DEFDATALEN + 8];
-
- pkt = (struct icmp *)packet;
-
- pkt->icmp_type = ICMP_ECHO;
- pkt->icmp_code = 0;
- pkt->icmp_cksum = 0;
- pkt->icmp_seq = ntransmitted++;
- pkt->icmp_id = myid;
- CLR(pkt->icmp_seq % MAX_DUP_CHK);
-
- gettimeofday((struct timeval *)&packet[8], NULL);
- pkt->icmp_cksum = in_cksum((unsigned short *)pkt, sizeof(packet));
-
- i = sendto(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *)&pingaddr, sizeof(struct sockaddr_in));
-
- if (i < 0 || i != sizeof(packet)) {
- if (i < 0) perror("ping");
- fprintf(stderr, "ping wrote %d chars; %d expected\n", i, sizeof(packet));
- exit(1);
- }
-
- signal(SIGALRM, sendping);
- if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
- alarm(PINGINTERVAL);
- } else { /* done, wait for the last ping to come back */
- /* todo, don't necessarily need to wait so long... */
- signal(SIGALRM, pingstats);
- alarm(MAXWAIT);
- }
+ struct icmp *pkt;
+ int i;
+ char packet[DEFDATALEN + 8];
+
+ pkt = (struct icmp *) packet;
+
+ pkt->icmp_type = ICMP_ECHO;
+ pkt->icmp_code = 0;
+ pkt->icmp_cksum = 0;
+ pkt->icmp_seq = ntransmitted++;
+ pkt->icmp_id = myid;
+ CLR(pkt->icmp_seq % MAX_DUP_CHK);
+
+ gettimeofday((struct timeval *) &packet[8], NULL);
+ pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
+
+ i = sendto(pingsock, packet, sizeof(packet), 0,
+ (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+
+ if (i < 0 || i != sizeof(packet)) {
+ if (i < 0)
+ perror("ping");
+ fprintf(stderr, "ping wrote %d chars; %d expected\n", i,
+ sizeof(packet));
+ exit(1);
+ }
+
+ signal(SIGALRM, sendping);
+ if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
+ alarm(PINGINTERVAL);
+ } else { /* done, wait for the last ping to come back */
+ /* todo, don't necessarily need to wait so long... */
+ signal(SIGALRM, pingstats);
+ alarm(MAXWAIT);
+ }
}
-
+
static void unpack(char *buf, int sz, struct sockaddr_in *from)
{
- struct icmp *icmppkt;
- struct iphdr *iphdr;
- struct timeval tv, *tp;
- int hlen, dupflag;
- unsigned long triptime;
-
- gettimeofday(&tv, NULL);
-
- /* check IP header */
- iphdr = (struct iphdr *)buf;
- hlen = iphdr->ihl << 2;
- /* discard if too short */
- if (sz < (DEFDATALEN + ICMP_MINLEN)) return;
-
- sz -= hlen;
- icmppkt = (struct icmp *)(buf + hlen);
-
- if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
- if (icmppkt->icmp_id != myid) return; /* not our ping */
- ++nreceived;
- tp = (struct timeval *)icmppkt->icmp_data;
-
- if ((tv.tv_usec -= tp->tv_usec) < 0) {
- --tv.tv_sec;
- tv.tv_usec += 1000000;
- }
- tv.tv_sec -= tp->tv_sec;
-
- triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
- tsum += triptime;
- if (triptime < tmin) tmin = triptime;
- if (triptime > tmax) tmax = triptime;
-
- if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
- ++nrepeats;
- --nreceived;
- dupflag = 1;
+ struct icmp *icmppkt;
+ struct iphdr *iphdr;
+ struct timeval tv, *tp;
+ int hlen, dupflag;
+ unsigned long triptime;
+
+ gettimeofday(&tv, NULL);
+
+ /* check IP header */
+ iphdr = (struct iphdr *) buf;
+ hlen = iphdr->ihl << 2;
+ /* discard if too short */
+ if (sz < (DEFDATALEN + ICMP_MINLEN))
+ return;
+
+ sz -= hlen;
+ icmppkt = (struct icmp *) (buf + hlen);
+
+ if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
+ if (icmppkt->icmp_id != myid)
+ return; /* not our ping */
+ ++nreceived;
+ tp = (struct timeval *) icmppkt->icmp_data;
+
+ if ((tv.tv_usec -= tp->tv_usec) < 0) {
+ --tv.tv_sec;
+ tv.tv_usec += 1000000;
+ }
+ tv.tv_sec -= tp->tv_sec;
+
+ triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
+ tsum += triptime;
+ if (triptime < tmin)
+ tmin = triptime;
+ if (triptime > tmax)
+ tmax = triptime;
+
+ if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
+ ++nrepeats;
+ --nreceived;
+ dupflag = 1;
+ } else {
+ SET(icmppkt->icmp_seq % MAX_DUP_CHK);
+ dupflag = 0;
+ }
+
+ if (options & O_QUIET)
+ return;
+
+ printf("%d bytes from %s: icmp_seq=%u", sz,
+ inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
+ icmppkt->icmp_seq);
+ printf(" ttl=%d", iphdr->ttl);
+ printf(" time=%lu.%lu ms", triptime / 10, triptime % 10);
+ if (dupflag)
+ printf(" (DUP!)");
+ printf("\n");
} else {
- SET(icmppkt->icmp_seq % MAX_DUP_CHK);
- dupflag = 0;
+ fprintf(stderr,
+ "Warning: unknown ICMP packet received (not echo-reply)\n");
}
-
- if (options & O_QUIET) return;
-
- printf("%d bytes from %s: icmp_seq=%u", sz,
- inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
- icmppkt->icmp_seq);
- printf(" ttl=%d", iphdr->ttl);
- printf(" time=%lu.%lu ms", triptime/10, triptime%10);
- if (dupflag) printf(" (DUP!)");
- printf("\n");
- } else {
- fprintf(stderr, "Warning: unknown ICMP packet received (not echo-reply)\n");
- }
}
static void ping(char *host)
{
- struct protoent *proto;
- struct hostent *h;
- char buf[MAXHOSTNAMELEN];
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
- int sockopt;
-
- proto = getprotobyname("icmp");
- /* if getprotobyname failed, just silently force
- * proto->p_proto to have the correct value for "icmp" */
- if ((pingsock = socket(AF_INET, SOCK_RAW,
- (proto ? proto->p_proto : 1))) < 0) { /* 1 == ICMP */
- if (errno == EPERM) {
- fprintf(stderr, "ping: permission denied. (are you root?)\n");
- } else {
- perror("ping");
+ struct protoent *proto;
+ struct hostent *h;
+ char buf[MAXHOSTNAMELEN];
+ char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+ int sockopt;
+
+ proto = getprotobyname("icmp");
+ /* if getprotobyname failed, just silently force
+ * proto->p_proto to have the correct value for "icmp" */
+ if ((pingsock = socket(AF_INET, SOCK_RAW,
+ (proto ? proto->p_proto : 1))) < 0) { /* 1 == ICMP */
+ if (errno == EPERM) {
+ fprintf(stderr, "ping: permission denied. (are you root?)\n");
+ } else {
+ perror("ping");
+ }
+ exit(1);
}
- exit(1);
- }
-
- /* drop root privs if running setuid */
- setuid(getuid());
-
- memset(&pingaddr, 0, sizeof(struct sockaddr_in));
- pingaddr.sin_family = AF_INET;
- if (!(h = gethostbyname(host))) {
- fprintf(stderr, "ping: unknown host %s\n", host);
- exit(1);
- }
-
- if (h->h_addrtype != AF_INET) {
- fprintf(stderr, "ping: unknown address type; only AF_INET is currently supported.\n");
- exit(1);
- }
-
- pingaddr.sin_family = AF_INET; /* h->h_addrtype */
- memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
- strncpy(buf, h->h_name, sizeof(buf)-1);
- hostname = buf;
-
- /* enable broadcast pings */
- sockopt = 1;
- setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *)&sockopt, sizeof(sockopt));
-
- /* set recv buf for broadcast pings */
- sockopt = 48 * 1024;
- setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *)&sockopt, sizeof(sockopt));
-
- printf("PING %s (%s): %d data bytes\n",
- hostname, inet_ntoa(*(struct in_addr *)&pingaddr.sin_addr.s_addr),
- DEFDATALEN);
-
- signal(SIGINT, pingstats);
-
- /* start the ping's going ... */
- sendping(0);
-
- /* listen for replies */
- while (1) {
- struct sockaddr_in from;
- size_t fromlen = sizeof(from);
- int c;
-
- if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *)&from, &fromlen)) < 0) {
- if (errno == EINTR) continue;
- perror("ping");
- continue;
+
+ /* drop root privs if running setuid */
+ setuid(getuid());
+
+ memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+ pingaddr.sin_family = AF_INET;
+ if (!(h = gethostbyname(host))) {
+ fprintf(stderr, "ping: unknown host %s\n", host);
+ exit(1);
+ }
+
+ if (h->h_addrtype != AF_INET) {
+ fprintf(stderr,
+ "ping: unknown address type; only AF_INET is currently supported.\n");
+ exit(1);
}
- unpack(packet, c, &from);
- if (pingcount > 0 && nreceived >= pingcount) break;
- }
- pingstats(0);
+
+ pingaddr.sin_family = AF_INET; /* h->h_addrtype */
+ memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
+ strncpy(buf, h->h_name, sizeof(buf) - 1);
+ hostname = buf;
+
+ /* enable broadcast pings */
+ sockopt = 1;
+ setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
+ sizeof(sockopt));
+
+ /* set recv buf for broadcast pings */
+ sockopt = 48 * 1024;
+ setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
+ sizeof(sockopt));
+
+ printf("PING %s (%s): %d data bytes\n",
+ hostname,
+ inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
+ DEFDATALEN);
+
+ signal(SIGINT, pingstats);
+
+ /* start the ping's going ... */
+ sendping(0);
+
+ /* listen for replies */
+ while (1) {
+ struct sockaddr_in from;
+ size_t fromlen = sizeof(from);
+ int c;
+
+ if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
+ (struct sockaddr *) &from, &fromlen)) < 0) {
+ if (errno == EINTR)
+ continue;
+ perror("ping");
+ continue;
+ }
+ unpack(packet, c, &from);
+ if (pingcount > 0 && nreceived >= pingcount)
+ break;
+ }
+ pingstats(0);
}
extern int ping_main(int argc, char **argv)
{
- char *thisarg;
-
- argc--;
- argv++;
- options = 0;
- /* Parse any options */
- while (argc > 1) {
- if (**argv != '-') usage(ping_usage);
- thisarg = *argv; thisarg++;
- switch (*thisarg) {
- case 'q': options |= O_QUIET; break;
- case 'c':
- argc--; argv++;
- pingcount = atoi(*argv);
- break;
- default:
- usage(ping_usage);
- }
- argc--; argv++;
- }
- if (argc < 1) usage(ping_usage);
-
- myid = getpid() & 0xFFFF;
- ping(*argv);
- exit(TRUE);
+ char *thisarg;
+
+ argc--;
+ argv++;
+ options = 0;
+ /* Parse any options */
+ while (argc > 1) {
+ if (**argv != '-')
+ usage(ping_usage);
+ thisarg = *argv;
+ thisarg++;
+ switch (*thisarg) {
+ case 'q':
+ options |= O_QUIET;
+ break;
+ case 'c':
+ argc--;
+ argv++;
+ pingcount = atoi(*argv);
+ break;
+ default:
+ usage(ping_usage);
+ }
+ argc--;
+ argv++;
+ }
+ if (argc < 1)
+ usage(ping_usage);
+
+ myid = getpid() & 0xFFFF;
+ ping(*argv);
+ exit(TRUE);
}
#endif