circlecloud/proxychains-ng
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remove dangerous uses of inet_ntoa

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rofl0r 2012-01-27 20:00:22 +01:00
parent 526fb8b410
commit 5b5cc604a6
3 changed files with 44 additions and 31 deletions
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42
src/core.c
View File

@ -93,6 +93,30 @@ in_addr_t make_internal_ip(uint32_t index) {
return (in_addr_t) ret.as_int; return (in_addr_t) ret.as_int;
} }
// stolen from libulz (C) rofl0r
void pc_stringfromipv4(unsigned char *ip_buf_4_bytes, char *outbuf_16_bytes) {
unsigned char *p;
char *o = outbuf_16_bytes;
unsigned char n;
for(p = ip_buf_4_bytes; p < ip_buf_4_bytes + 4; p++) {
n = *p;
if(*p >= 100) {
if(*p >= 200)
*(o++) = '2';
else
*(o++) = '1';
n %= 100;
}
if(*p >= 10) {
*(o++) = (n / 10) + '0';
n %= 10;
}
*(o++) = n + '0';
*(o++) = '.';
}
o[-1] = 0;
}
static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static int poll_retry(struct pollfd *fds, nfds_t nfsd, int timeout) { static int poll_retry(struct pollfd *fds, nfds_t nfsd, int timeout) {
@ -277,12 +301,16 @@ static int tunnel_to(int sock, ip_type ip, unsigned short port, proxy_type pt, c
int len; int len;
unsigned char buff[BUFF_SIZE]; unsigned char buff[BUFF_SIZE];
char ip_buf[16];
//memset (buff, 0, sizeof(buff)); //memset (buff, 0, sizeof(buff));
switch (pt) { switch (pt) {
case HTTP_TYPE:{ case HTTP_TYPE:{
if(!dns_len) if(!dns_len) {
dns_name = inet_ntoa(*(struct in_addr *) &ip.as_int); pc_stringfromipv4(&ip.octet[0], ip_buf);
dns_name = ip_buf;
}
snprintf((char *) buff, sizeof(buff), "CONNECT %s:%d HTTP/1.0\r\n", dns_name, snprintf((char *) buff, sizeof(buff), "CONNECT %s:%d HTTP/1.0\r\n", dns_name,
ntohs(port)); ntohs(port));
@ -487,13 +515,15 @@ static int tunnel_to(int sock, ip_type ip, unsigned short port, proxy_type pt, c
static int start_chain(int *fd, proxy_data * pd, char *begin_mark) { static int start_chain(int *fd, proxy_data * pd, char *begin_mark) {
struct sockaddr_in addr; struct sockaddr_in addr;
char ip_buf[16];
*fd = socket(PF_INET, SOCK_STREAM, 0); *fd = socket(PF_INET, SOCK_STREAM, 0);
if(*fd == -1) if(*fd == -1)
goto error; goto error;
pc_stringfromipv4(&pd->ip.octet[0], ip_buf);
proxychains_write_log(LOG_PREFIX "%s " TP " %s:%d ", proxychains_write_log(LOG_PREFIX "%s " TP " %s:%d ",
begin_mark, inet_ntoa(*(struct in_addr *) &pd->ip), htons(pd->port)); begin_mark, ip_buf, htons(pd->port));
pd->ps = PLAY_STATE; pd->ps = PLAY_STATE;
memset(&addr, 0, sizeof(addr)); memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET; addr.sin_family = AF_INET;
@ -570,6 +600,7 @@ static unsigned int calc_alive(proxy_data * pd, unsigned int proxy_count) {
static int chain_step(int ns, proxy_data * pfrom, proxy_data * pto) { static int chain_step(int ns, proxy_data * pfrom, proxy_data * pto) {
int retcode = -1; int retcode = -1;
char *hostname; char *hostname;
char ip_buf[16];
PDEBUG("chain_step()\n"); PDEBUG("chain_step()\n");
@ -579,7 +610,8 @@ static int chain_step(int ns, proxy_data * pfrom, proxy_data * pto) {
goto usenumericip; goto usenumericip;
} else { } else {
usenumericip: usenumericip:
hostname = inet_ntoa(*(struct in_addr *) &pto->ip); pc_stringfromipv4(&pto->ip.octet[0], ip_buf);
hostname = ip_buf;
} }
proxychains_write_log(TP " %s:%d ", hostname, htons(pto->port)); proxychains_write_log(TP " %s:%d ", hostname, htons(pto->port));

2
src/core.h
View File

@ -142,6 +142,8 @@ int proxy_getaddrinfo(const char *node, const char *service,
struct hostent* proxy_gethostbyname(const char *name); struct hostent* proxy_gethostbyname(const char *name);
void pc_stringfromipv4(unsigned char *ip_buf_4_bytes, char *outbuf_16_bytes);
#ifdef DEBUG #ifdef DEBUG
# define PDEBUG(fmt, args...) fprintf(stderr,"DEBUG:"fmt, ## args) # define PDEBUG(fmt, args...) fprintf(stderr,"DEBUG:"fmt, ## args)
#else #else

31
src/libproxychains.c
View File

@ -385,6 +385,7 @@ int getnameinfo(const struct sockaddr *sa,
socklen_t salen, char *host, socklen_t hostlen, char *serv, socklen_t servlen, int flags) socklen_t salen, char *host, socklen_t hostlen, char *serv, socklen_t servlen, int flags)
#endif #endif
{ {
char ip_buf[16];
int ret = 0; int ret = 0;
if(!init_l) if(!init_l)
@ -395,38 +396,16 @@ int getnameinfo(const struct sockaddr *sa,
if(!proxychains_resolver) { if(!proxychains_resolver) {
ret = true_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); ret = true_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
} else { } else {
if(hostlen) if(hostlen) {
strncpy(host, inet_ntoa(SOCKADDR_2(*sa)), hostlen); pc_stringfromipv4((unsigned char*) &(SOCKADDR_2(*sa)), ip_buf);
strncpy(host, ip_buf, hostlen);
}
if(servlen) if(servlen)
snprintf(serv, servlen, "%d", ntohs(SOCKPORT(*sa))); snprintf(serv, servlen, "%d", ntohs(SOCKPORT(*sa)));
} }
return ret; return ret;
} }
// stolen from libulz (C) rofl0r
static void pc_stringfromipv4(unsigned char *ip_buf_4_bytes, char *outbuf_16_bytes) {
unsigned char *p;
char *o = outbuf_16_bytes;
unsigned char n;
for(p = ip_buf_4_bytes; p < ip_buf_4_bytes + 4; p++) {
n = *p;
if(*p >= 100) {
if(*p >= 200)
*(o++) = '2';
else
*(o++) = '1';
n %= 100;
}
if(*p >= 10) {
*(o++) = (n / 10) + '0';
n %= 10;
}
*(o++) = n + '0';
*(o++) = '.';
}
o[-1] = 0;
}
struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) { struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) {
static char buf[16]; static char buf[16];
static char ipv4[4]; static char ipv4[4];