#include "transparent-proxy.h"

#include "conns.h"

#include "heap.h"

#include "html-error.h"

#include "log.h"

#include "reqs.h"

#include "text.h"

#include "conf.h"

static int build_url (char **url, const char *host, int port, const char *path)

{

int len;

assert (url != NULL);

assert (host != NULL);

assert (port > 0 && port < 32768);

assert (path != NULL);

len = strlen (host) + strlen (path) + 14;

*url = (char *) safemalloc (len);

if (*url == NULL)

return -1;

return snprintf (*url, len, "http://%s:%d%s", host, port, path);

}

do_transparent_proxy (struct conn_s *connptr, hashmap_t hashofheaders,

struct request_s *request, struct config_s *conf,

char **url)

{

socklen_t length;

char *data;

size_t ulen = strlen (*url);

ssize_t i;

length = hashmap_entry_by_key (hashofheaders, "host", (void **) &data);

if (length <= 0) {

struct sockaddr_in dest_addr;

if (getsockname

(connptr->client_fd, (struct sockaddr *) &dest_addr,

&length) < 0) {

log_message (LOG_ERR,

"process_request: cannot get destination IP for %d",

connptr->client_fd);

indicate_http_error (connptr, 400, "Bad Request",

"detail", "Unknown destination",

"url", *url, NULL);

return 0;

}

request->host = (char *) safemalloc (17);

strlcpy (request->host, inet_ntoa (dest_addr.sin_addr), 17);

request->port = ntohs (dest_addr.sin_port);

request->path = (char *) safemalloc (ulen + 1);

strlcpy (request->path, *url, ulen + 1);

build_url (url, request->host, request->port, request->path);

log_message (LOG_INFO,

"process_request: trans IP %s %s for %d",

request->method, *url, connptr->client_fd);

} else {

request->host = (char *) safemalloc (length + 1);

if (sscanf (data, "%[^:]:%hu", request->host, &request->port) !=

2) {

strlcpy (request->host, data, length + 1);

request->port = HTTP_PORT;

}

request->path = (char *) safemalloc (ulen + 1);

strlcpy (request->path, *url, ulen + 1);

build_url (url, request->host, request->port, request->path);

log_message (LOG_INFO,

"process_request: trans Host %s %s for %d",

request->method, *url, connptr->client_fd);

}

if (conf->listen_addrs == NULL) {

return 1;

}

for (i = 0; i < vector_length(conf->listen_addrs); i++) {

const char *addr;

addr = (char *)vector_getentry(conf->listen_addrs, i, NULL);

if (addr && strcmp(request->host, addr) == 0) {

log_message(LOG_ERR,

"transparent: destination IP %s is local "

"on socket fd %d",

request->host, connptr->client_fd);

indicate_http_error(connptr, 400, "Bad Request",

"detail",

"You tried to connect to the "

"machine the proxy is running on",

"url", *url, NULL);

return 0;

}

}

return 1;

}