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freebsd-skq/usr.bin/tftp/main.c
delphij 12dcab665d - uri is expected to be nul-terminated (strchr used later), 
so use strlcpy instead of strncpy.
 - unroll the other two cases of strncpy+\0 to strlcpy.

MFC after:	2 weeks
2015-08-31 06:11:39 +00:00

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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#if 0
#ifndef lint
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
/*
* TFTP User Program -- Command Interface.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/tftp.h>
#include <ctype.h>
#include <err.h>
#include <histedit.h>
#include <netdb.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tftp-utils.h"
#include "tftp-io.h"
#include "tftp-options.h"
#include "tftp.h"
#define MAXLINE (2 * MAXPATHLEN)
#define TIMEOUT 5 /* secs between rexmt's */
typedef struct sockaddr_storage peeraddr;
static int connected;
static char mode[32];
static jmp_buf toplevel;
volatile int txrx_error;
static int peer;
#define MAX_MARGV 20
static int margc;
static char *margv[MAX_MARGV];
int verbose;
static char *port = NULL;
static void get(int, char **);
static void help(int, char **);
static void intr(int);
static void modecmd(int, char **);
static void put(int, char **);
static void quit(int, char **);
static void setascii(int, char **);
static void setbinary(int, char **);
static void setpeer0(char *, const char *);
static void setpeer(int, char **);
static void settimeoutpacket(int, char **);
static void settimeoutnetwork(int, char **);
static void setdebug(int, char **);
static void setverbose(int, char **);
static void showstatus(int, char **);
static void setblocksize(int, char **);
static void setblocksize2(int, char **);
static void setoptions(int, char **);
static void setrollover(int, char **);
static void setpacketdrop(int, char **);
static void command(void) __dead2;
static const char *command_prompt(void);
static void urihandling(char *URI);
static void getusage(char *);
static void makeargv(char *line);
static void putusage(char *);
static void settftpmode(const char *);
static char *tail(char *);
static struct cmd *getcmd(char *);
#define HELPINDENT (sizeof("connect"))
struct cmd {
const char *name;
void (*handler)(int, char **);
const char *help;
};
static struct cmd cmdtab[] = {
{ "connect", setpeer, "connect to remote tftp" },
{ "mode", modecmd, "set file transfer mode" },
{ "put", put, "send file" },
{ "get", get, "receive file" },
{ "quit", quit, "exit tftp" },
{ "verbose", setverbose, "toggle verbose mode" },
{ "status", showstatus, "show current status" },
{ "binary", setbinary, "set mode to octet" },
{ "ascii", setascii, "set mode to netascii" },
{ "rexmt", settimeoutpacket,
"set per-packet retransmission timeout[-]" },
{ "timeout", settimeoutnetwork,
"set total retransmission timeout" },
{ "trace", setdebug, "enable 'debug packet'[-]" },
{ "debug", setdebug, "enable verbose output" },
{ "blocksize", setblocksize, "set blocksize[*]" },
{ "blocksize2", setblocksize2, "set blocksize as a power of 2[**]" },
{ "rollover", setrollover, "rollover after 64K packets[**]" },
{ "options", setoptions,
"enable or disable RFC2347 style options" },
{ "help", help, "print help information" },
{ "packetdrop", setpacketdrop, "artificial packetloss feature" },
{ "?", help, "print help information" },
{ NULL, NULL, NULL }
};
static struct modes {
const char *m_name;
const char *m_mode;
} modes[] = {
{ "ascii", "netascii" },
{ "netascii", "netascii" },
{ "binary", "octet" },
{ "image", "octet" },
{ "octet", "octet" },
{ NULL, NULL }
};
int
main(int argc, char *argv[])
{
acting_as_client = 1;
peer = -1;
strcpy(mode, "netascii");
signal(SIGINT, intr);
if (argc > 1) {
if (setjmp(toplevel) != 0)
exit(txrx_error);
if (strncmp(argv[1], "tftp://", 7) == 0) {
urihandling(argv[1]);
exit(txrx_error);
}
setpeer(argc, argv);
}
if (setjmp(toplevel) != 0)
(void)putchar('\n');
init_options();
command();
}
/*
* RFC3617 handling of TFTP URIs:
*
* tftpURI = "tftp://" host "/" file [ mode ]
* mode = ";" "mode=" ( "netascii" / "octet" )
* file = *( unreserved / escaped )
* host = <as specified by RFC 2732>
* unreserved = <as specified in RFC 2396>
* escaped = <as specified in RFC 2396>
*
* We are cheating a little bit by allowing any mode as specified in the
* modes table defined earlier on in this file and mapping it on the real
* mode.
*/
static void
urihandling(char *URI)
{
char uri[ARG_MAX];
char *host = NULL;
char *path = NULL;
char *opts = NULL;
const char *tmode = "octet";
char *s;
char line[MAXLINE];
int i;
strlcpy(uri, URI, ARG_MAX);
host = uri + 7;
if ((s = strchr(host, '/')) == NULL) {
fprintf(stderr,
"Invalid URI: Couldn't find / after hostname\n");
exit(1);
}
*s = '\0';
path = s + 1;
if ((s = strchr(path, ';')) != NULL) {
*s = '\0';
opts = s + 1;
if (strncmp(opts, "mode=", 5) == 0) {
tmode = opts;
tmode += 5;
for (i = 0; modes[i].m_name != NULL; i++) {
if (strcmp(modes[i].m_name, tmode) == 0)
break;
}
if (modes[i].m_name == NULL) {
fprintf(stderr, "Invalid mode: '%s'\n", mode);
exit(1);
}
settftpmode(modes[i].m_mode);
}
} else {
settftpmode("octet");
}
setpeer0(host, NULL);
sprintf(line, "get %s", path);
makeargv(line);
get(margc, margv);
}
static char hostname[MAXHOSTNAMELEN];
static void
setpeer0(char *host, const char *lport)
{
struct addrinfo hints, *res0, *res;
int error;
const char *cause = "unknown";
if (connected) {
close(peer);
peer = -1;
}
connected = 0;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
hints.ai_flags = AI_CANONNAME;
if (!lport)
lport = "tftp";
error = getaddrinfo(host, lport, &hints, &res0);
if (error) {
warnx("%s", gai_strerror(error));
return;
}
for (res = res0; res; res = res->ai_next) {
if (res->ai_addrlen > sizeof(peeraddr))
continue;
peer = socket(res->ai_family, res->ai_socktype,
res->ai_protocol);
if (peer < 0) {
cause = "socket";
continue;
}
memset(&peer_sock, 0, sizeof(peer_sock));
peer_sock.ss_family = res->ai_family;
peer_sock.ss_len = res->ai_addrlen;
if (bind(peer, (struct sockaddr *)&peer_sock, peer_sock.ss_len) < 0) {
cause = "bind";
close(peer);
peer = -1;
continue;
}
break;
}
if (peer < 0)
warn("%s", cause);
else {
/* res->ai_addr <= sizeof(peeraddr) is guaranteed */
memcpy(&peer_sock, res->ai_addr, res->ai_addrlen);
if (res->ai_canonname) {
(void) strlcpy(hostname, res->ai_canonname,
sizeof(hostname));
} else
(void) strlcpy(hostname, host, sizeof(hostname));
connected = 1;
}
freeaddrinfo(res0);
}
static void
setpeer(int argc, char *argv[])
{
char line[MAXLINE];
if (argc < 2) {
strcpy(line, "Connect ");
printf("(to) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv(line);
argc = margc;
argv = margv;
}
if ((argc < 2) || (argc > 3)) {
printf("usage: %s [host [port]]\n", argv[0]);
return;
}
if (argc == 3) {
port = argv[2];
setpeer0(argv[1], argv[2]);
} else
setpeer0(argv[1], NULL);
}
static void
modecmd(int argc, char *argv[])
{
struct modes *p;
const char *sep;
if (argc < 2) {
printf("Using %s mode to transfer files.\n", mode);
return;
}
if (argc == 2) {
for (p = modes; p->m_name; p++)
if (strcmp(argv[1], p->m_name) == 0)
break;
if (p->m_name) {
settftpmode(p->m_mode);
return;
}
printf("%s: unknown mode\n", argv[1]);
/* drop through and print usage message */
}
printf("usage: %s [", argv[0]);
sep = " ";
for (p = modes; p->m_name != NULL; p++) {
printf("%s%s", sep, p->m_name);
if (*sep == ' ')
sep = " | ";
}
printf(" ]\n");
return;
}
static void
setbinary(int argc __unused, char *argv[] __unused)
{
settftpmode("octet");
}
static void
setascii(int argc __unused, char *argv[] __unused)
{
settftpmode("netascii");
}
static void
settftpmode(const char *newmode)
{
strcpy(mode, newmode);
if (verbose)
printf("mode set to %s\n", mode);
}
/*
* Send file(s).
*/
static void
put(int argc, char *argv[])
{
int fd;
int n;
char *cp, *targ;
char line[MAXLINE];
struct stat sb;
if (argc < 2) {
strcpy(line, "send ");
printf("(file) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv(line);
argc = margc;
argv = margv;
}
if (argc < 2) {
putusage(argv[0]);
return;
}
targ = argv[argc - 1];
if (strrchr(argv[argc - 1], ':')) {
char *lcp;
for (n = 1; n < argc - 1; n++)
if (strchr(argv[n], ':')) {
putusage(argv[0]);
return;
}
lcp = argv[argc - 1];
targ = strrchr(lcp, ':');
*targ++ = 0;
if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
lcp[strlen(lcp) - 1] = '\0';
lcp++;
}
setpeer0(lcp, NULL);
}
if (!connected) {
printf("No target machine specified.\n");
return;
}
if (argc < 4) {
cp = argc == 2 ? tail(targ) : argv[1];
fd = open(cp, O_RDONLY);
if (fd < 0) {
warn("%s", cp);
return;
}
stat(cp, &sb);
asprintf(&options[OPT_TSIZE].o_request, "%ju", sb.st_size);
if (verbose)
printf("putting %s to %s:%s [%s]\n",
cp, hostname, targ, mode);
xmitfile(peer, port, fd, targ, mode);
return;
}
/* this assumes the target is a directory */
/* on a remote unix system. hmmmm. */
cp = strchr(targ, '\0');
*cp++ = '/';
for (n = 1; n < argc - 1; n++) {
strcpy(cp, tail(argv[n]));
fd = open(argv[n], O_RDONLY);
if (fd < 0) {
warn("%s", argv[n]);
continue;
}
stat(cp, &sb);
asprintf(&options[OPT_TSIZE].o_request, "%ju", sb.st_size);
if (verbose)
printf("putting %s to %s:%s [%s]\n",
argv[n], hostname, targ, mode);
xmitfile(peer, port, fd, targ, mode);
}
}
static void
putusage(char *s)
{
printf("usage: %s file [remotename]\n", s);
printf(" %s file host:remotename\n", s);
printf(" %s file1 file2 ... fileN [[host:]remote-directory]\n", s);
}
/*
* Receive file(s).
*/
static void
get(int argc, char *argv[])
{
int fd;
int n;
char *cp;
char *src;
char line[MAXLINE];
if (argc < 2) {
strcpy(line, "get ");
printf("(files) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv(line);
argc = margc;
argv = margv;
}
if (argc < 2) {
getusage(argv[0]);
return;
}
if (!connected) {
for (n = 1; n < argc ; n++)
if (strrchr(argv[n], ':') == 0) {
printf("No remote host specified and "
"no host given for file '%s'\n", argv[n]);
getusage(argv[0]);
return;
}
}
for (n = 1; n < argc ; n++) {
src = strrchr(argv[n], ':');
if (src == NULL)
src = argv[n];
else {
char *lcp;
*src++ = 0;
lcp = argv[n];
if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
lcp[strlen(lcp) - 1] = '\0';
lcp++;
}
setpeer0(lcp, NULL);
if (!connected)
continue;
}
if (argc < 4) {
cp = argc == 3 ? argv[2] : tail(src);
fd = creat(cp, 0644);
if (fd < 0) {
warn("%s", cp);
return;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
recvfile(peer, port, fd, src, mode);
break;
}
cp = tail(src); /* new .. jdg */
fd = creat(cp, 0644);
if (fd < 0) {
warn("%s", cp);
continue;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
recvfile(peer, port, fd, src, mode);
}
}
static void
getusage(char *s)
{
printf("usage: %s file [localname]\n", s);
printf(" %s [host:]file [localname]\n", s);
printf(" %s [host1:]file1 [host2:]file2 ... [hostN:]fileN\n", s);
}
static void
settimeoutpacket(int argc, char *argv[])
{
int t;
char line[MAXLINE];
if (argc < 2) {
strcpy(line, "Packet timeout ");
printf("(value) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv(line);
argc = margc;
argv = margv;
}
if (argc != 2) {
printf("usage: %s value\n", argv[0]);
return;
}
t = atoi(argv[1]);
if (t < 0) {
printf("%s: bad value\n", argv[1]);
return;
}
settimeouts(t, timeoutnetwork, maxtimeouts);
}
static void
settimeoutnetwork(int argc, char *argv[])
{
int t;
char line[MAXLINE];
if (argc < 2) {
strcpy(line, "Network timeout ");
printf("(value) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv(line);
argc = margc;
argv = margv;
}
if (argc != 2) {
printf("usage: %s value\n", argv[0]);
return;
}
t = atoi(argv[1]);
if (t < 0) {
printf("%s: bad value\n", argv[1]);
return;
}
settimeouts(timeoutpacket, t, maxtimeouts);
}
static void
showstatus(int argc __unused, char *argv[] __unused)
{
printf("Remote host: %s\n",
connected ? hostname : "none specified yet");
printf("RFC2347 Options support: %s\n",
options_rfc_enabled ? "enabled" : "disabled");
printf("Non-RFC defined options support: %s\n",
options_extra_enabled ? "enabled" : "disabled");
printf("Mode: %s\n", mode);
printf("Verbose: %s\n", verbose ? "on" : "off");
printf("Debug: %s\n", debug_show(debug));
printf("Artificial packetloss: %d in 100 packets\n",
packetdroppercentage);
printf("Segment size: %d bytes\n", segsize);
printf("Network timeout: %d seconds\n", timeoutpacket);
printf("Maximum network timeout: %d seconds\n", timeoutnetwork);
printf("Maximum timeouts: %d \n", maxtimeouts);
}
static void
intr(int dummy __unused)
{
signal(SIGALRM, SIG_IGN);
alarm(0);
longjmp(toplevel, -1);
}
static char *
tail(char *filename)
{
char *s;
while (*filename) {
s = strrchr(filename, '/');
if (s == NULL)
break;
if (s[1])
return (s + 1);
*s = '\0';
}
return (filename);
}
static const char *
command_prompt(void)
{
return ("tftp> ");
}
/*
* Command parser.
*/
static void
command(void)
{
HistEvent he;
struct cmd *c;
static EditLine *el;
static History *hist;
const char *bp;
char *cp;
int len, num, vrbose;
char line[MAXLINE];
vrbose = isatty(0);
if (vrbose) {
el = el_init("tftp", stdin, stdout, stderr);
hist = history_init();
history(hist, &he, H_SETSIZE, 100);
el_set(el, EL_HIST, history, hist);
el_set(el, EL_EDITOR, "emacs");
el_set(el, EL_PROMPT, command_prompt);
el_set(el, EL_SIGNAL, 1);
el_source(el, NULL);
}
for (;;) {
if (vrbose) {
if ((bp = el_gets(el, &num)) == NULL || num == 0)
exit(0);
len = (num > MAXLINE) ? MAXLINE : num;
memcpy(line, bp, len);
line[len] = '\0';
history(hist, &he, H_ENTER, bp);
} else {
line[0] = 0;
if (fgets(line, sizeof line , stdin) == NULL) {
if (feof(stdin)) {
exit(txrx_error);
} else {
continue;
}
}
}
if ((cp = strchr(line, '\n')))
*cp = '\0';
if (line[0] == 0)
continue;
makeargv(line);
if (margc == 0)
continue;
c = getcmd(margv[0]);
if (c == (struct cmd *)-1) {
printf("?Ambiguous command\n");
continue;
}
if (c == 0) {
printf("?Invalid command\n");
continue;
}
(*c->handler)(margc, margv);
}
}
static struct cmd *
getcmd(char *name)
{
const char *p, *q;
struct cmd *c, *found;
int nmatches, longest;
longest = 0;
nmatches = 0;
found = 0;
for (c = cmdtab; (p = c->name) != NULL; c++) {
for (q = name; *q == *p++; q++)
if (*q == 0) /* exact match? */
return (c);
if (!*q) { /* the name was a prefix */
if (q - name > longest) {
longest = q - name;
nmatches = 1;
found = c;
} else if (q - name == longest)
nmatches++;
}
}
if (nmatches > 1)
return ((struct cmd *)-1);
return (found);
}
/*
* Slice a string up into argc/argv.
*/
static void
makeargv(char *line)
{
char *cp;
char **argp = margv;
margc = 0;
if ((cp = strchr(line, '\n')) != NULL)
*cp = '\0';
for (cp = line; margc < MAX_MARGV - 1 && *cp != '\0';) {
while (isspace(*cp))
cp++;
if (*cp == '\0')
break;
*argp++ = cp;
margc += 1;
while (*cp != '\0' && !isspace(*cp))
cp++;
if (*cp == '\0')
break;
*cp++ = '\0';
}
*argp++ = 0;
}
static void
quit(int argc __unused, char *argv[] __unused)
{
exit(txrx_error);
}
/*
* Help command.
*/
static void
help(int argc, char *argv[])
{
struct cmd *c;
if (argc == 1) {
printf("Commands may be abbreviated. Commands are:\n\n");
for (c = cmdtab; c->name; c++)
printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
printf("\n[-] : You shouldn't use these ones anymore.\n");
printf("[*] : RFC2347 options support required.\n");
printf("[**] : Non-standard RFC2347 option.\n");
return;
}
while (--argc > 0) {
char *arg;
arg = *++argv;
c = getcmd(arg);
if (c == (struct cmd *)-1)
printf("?Ambiguous help command: %s\n", arg);
else if (c == (struct cmd *)0)
printf("?Invalid help command: %s\n", arg);
else
printf("%s\n", c->help);
}
}
static void
setverbose(int argc __unused, char *argv[] __unused)
{
verbose = !verbose;
printf("Verbose mode %s.\n", verbose ? "on" : "off");
}
static void
setoptions(int argc, char *argv[])
{
if (argc == 2) {
if (strcasecmp(argv[1], "enable") == 0 ||
strcasecmp(argv[1], "on") == 0) {
options_extra_enabled = 1;
options_rfc_enabled = 1;
}
if (strcasecmp(argv[1], "disable") == 0 ||
strcasecmp(argv[1], "off") == 0) {
options_extra_enabled = 0;
options_rfc_enabled = 0;
}
if (strcasecmp(argv[1], "extra") == 0)
options_extra_enabled = !options_extra_enabled;
}
printf("Support for RFC2347 style options are now %s.\n",
options_rfc_enabled ? "enabled" : "disabled");
printf("Support for non-RFC defined options are now %s.\n",
options_extra_enabled ? "enabled" : "disabled");
printf("\nThe following options are available:\n"
"\toptions on : enable support for RFC2347 style options\n"
"\toptions off : disable support for RFC2347 style options\n"
"\toptions extra : toggle support for non-RFC defined options\n"
);
}
static void
setrollover(int argc, char *argv[])
{
if (argc == 2) {
if (strcasecmp(argv[1], "never") == 0 ||
strcasecmp(argv[1], "none") == 0) {
free(options[OPT_ROLLOVER].o_request);
options[OPT_ROLLOVER].o_request = NULL;
}
if (strcasecmp(argv[1], "1") == 0) {
free(options[OPT_ROLLOVER].o_request);
options[OPT_ROLLOVER].o_request = strdup("1");
}
if (strcasecmp(argv[1], "0") == 0) {
free(options[OPT_ROLLOVER].o_request);
options[OPT_ROLLOVER].o_request = strdup("0");
}
}
printf("Support for the rollover options is %s.\n",
options[OPT_ROLLOVER].o_request != NULL ? "enabled" : "disabled");
if (options[OPT_ROLLOVER].o_request != NULL)
printf("Block rollover will be to block %s.\n",
options[OPT_ROLLOVER].o_request);
printf("\nThe following rollover options are available:\n"
"\trollover 0 : rollover to block zero (default)\n"
"\trollover 1 : rollover to block one\n"
"\trollover never : do not support the rollover option\n"
"\trollover none : do not support the rollover option\n"
);
}
static void
setdebug(int argc, char *argv[])
{
int i;
if (argc != 1) {
i = 1;
while (i < argc)
debug ^= debug_find(argv[i++]);
}
printf("The following debugging is enabled: %s\n", debug_show(debug));
printf("\nThe following debugs are available:\n");
i = 0;
while (debugs[i].name != NULL) {
printf("\t%s\t%s\n", debugs[i].name, debugs[i].desc);
i++;
}
}
static void
setblocksize(int argc, char *argv[])
{
if (!options_rfc_enabled)
printf("RFC2347 style options are not enabled "
"(but proceeding anyway)\n");
if (argc != 1) {
int size = atoi(argv[1]);
size_t max;
u_long maxdgram;
max = sizeof(maxdgram);
if (sysctlbyname("net.inet.udp.maxdgram",
&maxdgram, &max, NULL, 0) < 0) {
perror("sysctl: net.inet.udp.maxdgram");
return;
}
if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
printf("Blocksize should be between %d and %d bytes.\n",
BLKSIZE_MIN, BLKSIZE_MAX);
return;
} else if (size > (int)maxdgram - 4) {
printf("Blocksize can't be bigger than %ld bytes due "
"to the net.inet.udp.maxdgram sysctl limitation.\n",
maxdgram - 4);
asprintf(&options[OPT_BLKSIZE].o_request,
"%ld", maxdgram - 4);
} else {
asprintf(&options[OPT_BLKSIZE].o_request, "%d", size);
}
}
printf("Blocksize is now %s bytes.\n", options[OPT_BLKSIZE].o_request);
}
static void
setblocksize2(int argc, char *argv[])
{
if (!options_rfc_enabled || !options_extra_enabled)
printf(
"RFC2347 style or non-RFC defined options are not enabled "
"(but proceeding anyway)\n");
if (argc != 1) {
int size = atoi(argv[1]);
int i;
size_t max;
u_long maxdgram;
int sizes[] = {
8, 16, 32, 64, 128, 256, 512, 1024,
2048, 4096, 8192, 16384, 32768, 0
};
max = sizeof(maxdgram);
if (sysctlbyname("net.inet.udp.maxdgram",
&maxdgram, &max, NULL, 0) < 0) {
perror("sysctl: net.inet.udp.maxdgram");
return;
}
for (i = 0; sizes[i] != 0; i++) {
if (sizes[i] == size) break;
}
if (sizes[i] == 0) {
printf("Blocksize2 should be a power of two between "
"8 and 32768.\n");
return;
}
if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
printf("Blocksize2 should be between "
"%d and %d bytes.\n", BLKSIZE_MIN, BLKSIZE_MAX);
return;
} else if (size > (int)maxdgram - 4) {
printf("Blocksize2 can't be bigger than %ld bytes due "
"to the net.inet.udp.maxdgram sysctl limitation.\n",
maxdgram - 4);
for (i = 0; sizes[i+1] != 0; i++) {
if ((int)maxdgram < sizes[i+1]) break;
}
asprintf(&options[OPT_BLKSIZE2].o_request,
"%d", sizes[i]);
} else {
asprintf(&options[OPT_BLKSIZE2].o_request, "%d", size);
}
}
printf("Blocksize2 is now %s bytes.\n",
options[OPT_BLKSIZE2].o_request);
}
static void
setpacketdrop(int argc, char *argv[])
{
if (argc != 1)
packetdroppercentage = atoi(argv[1]);
printf("Randomly %d in 100 packets will be dropped\n",
packetdroppercentage);
}
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