Program analysis (pseudocode if possible)

[Vusi]

#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/route.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if_ether.h>
#include <net/if_dl.h>
#include <ifaddrs.h>
#include <stdio.h>

#include "ipschema.h "
#include "ssrv/sockaddr.h"

#ifndef lint
__RCSID("$Id: ethip.c 2314 2004-12-29 01:00:25Z dyoung $");
#endif

#define ETHIP "ethip"
#define WLANIP "wlanip"
#define RTMSGIP "rtip"
#define ETH6IP "eth6ip"
#define WLAN6IP "wlan6ip"

#define ENDSWITH(s, end) (strlen((s)) >= strlen((end)) && \
strcmp((s) + strlen((s)) - strlen((end)),
end) == 0)

void
usage(const char *proggie)
{
errx(EXIT_FAILU RE, "Usage: %s <interface>", proggie);
}

int
main(int argc, char **argv)
{
char buf[100];
struct sockaddr_dl *sdl;
int masklen, rc;
struct sockaddr *iaddr;
struct ether_addr mac;
struct ifaddrs *ifap, *ifa_iter;
ab_to_ip_t ab_to_ip;

if (argc < 2)
usage(argv[0]);

if (ENDSWITH(argv[0], ETHIP)) {
ab_to_ip = ab_to_eth_ip;
} else if (ENDSWITH(argv[0], WLANIP)) {
ab_to_ip = ab_to_wlan_ip;
} else if (ENDSWITH(argv[0], RTMSGIP)) {
ab_to_ip = ab_to_routemsg_ ip;
} else if (ENDSWITH(argv[0], ETH6IP)) {
ab_to_ip = ab_to_eth_ip6;
} else {
errx(EXIT_FAILU RE, "%s: unimplemented." , argv[0]);
}

if (getifaddrs(&if ap) == -1)
err(EXIT_FAILUR E, "ioctl");

for (ifa_iter = ifap; ifa_iter; ifa_iter = ifa_iter->ifa_next)
if (strcmp(ifa_ite r->ifa_name, argv[1]) == 0)
break;

if (!ifa_iter)
errx(EXIT_FAILU RE, "no such interface as %s", argv[1]);

for (ifa_iter = ifap; ifa_iter; ifa_iter = ifa_iter->ifa_next) {
if (strcmp(ifa_ite r->ifa_name, argv[1]) != 0)
continue;
if (ifa_iter->ifa_addr->sa_family == AF_LINK)
break;
}

if (!ifa_iter)
errx(EXIT_FAILU RE, "no link-level address for %s", argv[1]);

sdl = (struct sockaddr_dl *)ifa_iter->ifa_addr;

(void)memcpy(&m ac, LLADDR(sdl), sizeof(mac));
masklen = mac_to_ip(&mac, ab_to_ip, &iaddr);
rc = sockaddr_snprin tf(buf, sizeof(buf), "%a", iaddr);
if (rc == -1 || rc >= sizeof(buf))
errx(EXIT_FAILU RE, "%s: sockaddr_snprin tf", getprogname());
sockaddr_free(i addr);
(void)printf("% s/%d\n", buf, masklen);

freeifaddrs(ifa p);
return 0;
}

[Diez B. Roggisch]

Re: Program analysis (pseudocode if possible)

http://www.catb.org/~esr/faqs/smart-questions.html

[Bruno Desthuilliers]

Re: Program analysis (pseudocode if possible)

Vusi wrote:

#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/route.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if_ether.h>
#include <net/if_dl.h>
#include <ifaddrs.h>
#include <stdio.h>
>
#include "ipschema.h "
#include "ssrv/sockaddr.h"
>
#ifndef lint
__RCSID("$Id: ethip.c 2314 2004-12-29 01:00:25Z dyoung $");
#endif
>
#define ETHIP "ethip"
#define WLANIP "wlanip"
#define RTMSGIP "rtip"
#define ETH6IP "eth6ip"
#define WLAN6IP "wlan6ip"
>
#define ENDSWITH(s, end) (strlen((s)) >= strlen((end)) && \
strcmp((s) + strlen((s)) - strlen((end)),
end) == 0)
>
void
usage(const char *proggie)
{
errx(EXIT_FAILU RE, "Usage: %s <interface>", proggie);
}
>
int
main(int argc, char **argv)
{
char buf[100];
struct sockaddr_dl *sdl;
int masklen, rc;
struct sockaddr *iaddr;
struct ether_addr mac;
struct ifaddrs *ifap, *ifa_iter;
ab_to_ip_t ab_to_ip;
>
if (argc < 2)
usage(argv[0]);
>
if (ENDSWITH(argv[0], ETHIP)) {
ab_to_ip = ab_to_eth_ip;
} else if (ENDSWITH(argv[0], WLANIP)) {
ab_to_ip = ab_to_wlan_ip;
} else if (ENDSWITH(argv[0], RTMSGIP)) {
ab_to_ip = ab_to_routemsg_ ip;
} else if (ENDSWITH(argv[0], ETH6IP)) {
ab_to_ip = ab_to_eth_ip6;
} else {
errx(EXIT_FAILU RE, "%s: unimplemented." , argv[0]);
}
>
if (getifaddrs(&if ap) == -1)
err(EXIT_FAILUR E, "ioctl");
>
for (ifa_iter = ifap; ifa_iter; ifa_iter = ifa_iter->ifa_next)
if (strcmp(ifa_ite r->ifa_name, argv[1]) == 0)
break;
>
if (!ifa_iter)
errx(EXIT_FAILU RE, "no such interface as %s", argv[1]);
>
for (ifa_iter = ifap; ifa_iter; ifa_iter = ifa_iter->ifa_next) {
if (strcmp(ifa_ite r->ifa_name, argv[1]) != 0)
continue;
if (ifa_iter->ifa_addr->sa_family == AF_LINK)
break;
}
>
if (!ifa_iter)
errx(EXIT_FAILU RE, "no link-level address for %s", argv[1]);
>
sdl = (struct sockaddr_dl *)ifa_iter->ifa_addr;
>
(void)memcpy(&m ac, LLADDR(sdl), sizeof(mac));
masklen = mac_to_ip(&mac, ab_to_ip, &iaddr);
rc = sockaddr_snprin tf(buf, sizeof(buf), "%a", iaddr);
if (rc == -1 || rc >= sizeof(buf))
errx(EXIT_FAILU RE, "%s: sockaddr_snprin tf", getprogname());
sockaddr_free(i addr);
(void)printf("% s/%d\n", buf, masklen);
>
freeifaddrs(ifa p);
return 0;
}
>

<pseudocode>

BEGIN PROGRAM
read_this('http ://www.catb.org/~esr/faqs/smart-questions.html' )
do_your_homewor k()
END PROGRAM

--
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb@xiludom. gro'.split('@')])"

[Paul McGuire]

Re: Program analysis (pseudocode if possible)

"Bruno Desthuilliers" <onurb@xiludom. growrote in message
news:44a93c41$0 $22783$626a54ce @news.free.fr.. .
<snip>

<pseudocode>
>
BEGIN PROGRAM
read_this('http ://www.catb.org/~esr/faqs/smart-questions.html' )
do_your_homewor k()

if (cant_figure_it _out)
post_specific_q uestion_on_rele vant_newsgroup( "comp.lang. c")

END PROGRAM
>
--
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb@xiludom. gro'.split('@')])"

[Bruno Desthuilliers]

Re: Program analysis (pseudocode if possible)

Paul McGuire wrote:

"Bruno Desthuilliers" <onurb@xiludom. growrote in message
news:44a93c41$0 $22783$626a54ce @news.free.fr.. .
<snip>
>

>><pseudocode >
>>
>>BEGIN PROGRAM
> read_this('http ://www.catb.org/~esr/faqs/smart-questions.html' )
> do_your_homewor k()

>
if (cant_figure_it _out)

BEGIN

post_specific_q uestion_on_rele vant_newsgroup( "comp.lang. c")

answer =
post_specific_q uestion_on_rele vant_newsgroup( "comp.lang. c")
assert answer == DO_YOUR_HOMEWOR K
END IF

>>END PROGRAM
>>
>>--
>>bruno desthuilliers
>>python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
>>p in 'onurb@xiludom. gro'.split('@')])"

>
>
>

--
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb@xiludom. gro'.split('@')])"