unsigned char *translate_hashbang(unsigned char *up)
{
unsigned char *u, *p, *dp, *data, *post_seq;
int q;
unsigned char *r;
int rl;
if (!strstr(cast_const_char up, "#!") && !strstr(cast_const_char up, "#%21")) return up;
u = stracpy(up);
p = extract_position(u);
if (!p) {
free_u_ret_up:
mem_free(u);
return up;
}
if (p[0] == '!') dp = p + 1;
else if (!casecmp(p, cast_uchar "%21", 3)) dp = p + 3;
else {
mem_free(p);
goto free_u_ret_up;
}
if (!(post_seq = cast_uchar strchr(cast_const_char u, POST_CHAR))) post_seq = cast_uchar strchr(cast_const_char u, 0);
data = get_url_data(u);
if (!data) data = u;
r = init_str();
rl = 0;
add_bytes_to_str(&r, &rl, u, post_seq - u);
q = (int)strlen(cast_const_char data);
if (q && (data[q - 1] == '&' || data[q - 1] == '?'))
;
else if (strchr(cast_const_char data, '?')) add_chr_to_str(&r, &rl, '&');
else add_chr_to_str(&r, &rl, '?');
add_to_str(&r, &rl, cast_uchar "_escaped_fragment_=");
for (; *dp; dp++) {
unsigned char c = *dp;
if (c <= 0x20 || c == 0x23 || c == 0x25 || c == 0x26 || c == 0x2b || c >= 0x7f) {
unsigned char h[4];
sprintf(cast_char h, "%%%02X", c);
add_to_str(&r, &rl, h);
} else {
add_chr_to_str(&r, &rl, c);
}
}
add_to_str(&r, &rl, post_seq);
mem_free(u);
mem_free(p);
mem_free(up);
return r;
}
void ftp_send_retr_req(struct connection *c, int state)
{
struct ftp_connection_info *fi;
unsigned char *login;
int logl = 0;
set_timeout(c);
login = init_str();
if (!c->info && !(fi = add_file_cmd_to_str(c))) {
mem_free(login);
return;
} else fi = c->info;
if (ftp_options.fast_ftp) a:add_to_str(&login, &logl, fi->cmdbuf);
else {
unsigned char *nl = strchr(fi->cmdbuf, '\n');
if (!nl) goto a;
nl++;
add_bytes_to_str(&login, &logl, fi->cmdbuf, nl - fi->cmdbuf);
memmove(fi->cmdbuf, nl, strlen(nl) + 1);
}
write_to_socket(c, c->sock1, login, strlen(login), ftp_retr_1);
mem_free(login);
setcstate(c, state);
}
void http_send_header(struct connection *c)
{
static unsigned char *accept_charset = NULL;
struct http_connection_info *info;
int http10 = http_bugs.http10;
struct cache_entry *e = NULL;
unsigned char *hdr;
unsigned char *h, *u;
int l = 0;
int la;
unsigned char *post;
unsigned char *host;
find_in_cache(c->url, &c->cache);
host = upcase(c->url[0]) != 'P' ? c->url : get_url_data(c->url);
set_timeout(c);
info = mem_calloc(sizeof(struct http_connection_info));
c->info = info;
if ((h = get_host_name(host))) {
info->bl_flags = get_blacklist_flags(h);
mem_free(h);
}
if (info->bl_flags & BL_HTTP10) http10 = 1;
info->http10 = http10;
post = strchr(host, POST_CHAR);
if (post) post++;
hdr = init_str();
if (!post) add_to_str(&hdr, &l, "GET ");
else {
add_to_str(&hdr, &l, "POST ");
c->unrestartable = 2;
}
if (upcase(c->url[0]) != 'P') add_to_str(&hdr, &l, "/");
if (!(u = get_url_data(c->url))) {
mem_free(hdr);
setcstate(c, S_BAD_URL);
http_end_request(c, 0);
return;
}
if (post && post < u) {
mem_free(hdr);
setcstate(c, S_BAD_URL);
http_end_request(c, 0);
return;
}
add_url_to_str(&hdr, &l, u);
if (!http10) add_to_str(&hdr, &l, " HTTP/1.1\r\n");
else add_to_str(&hdr, &l, " HTTP/1.0\r\n");
if ((h = get_host_name(host))) {
add_to_str(&hdr, &l, "Host: ");
add_to_str(&hdr, &l, h);
mem_free(h);
if ((h = get_port_str(host))) {
add_to_str(&hdr, &l, ":");
add_to_str(&hdr, &l, h);
mem_free(h);
}
add_to_str(&hdr, &l, "\r\n");
}
add_to_str(&hdr, &l, "User-Agent: ");
if (!(*http_bugs.fake_useragent)) {
add_to_str(&hdr, &l, "Links (" VERSION_STRING "; ");
add_to_str(&hdr, &l, system_name);
if (!F && !list_empty(terminals)) {
struct terminal *t = terminals.prev;
if (!t->spec->braille) {
add_to_str(&hdr, &l, "; ");
add_num_to_str(&hdr, &l, t->x);
add_to_str(&hdr, &l, "x");
add_num_to_str(&hdr, &l, t->y);
} else {
add_to_str(&hdr, &l, "; braille");
}
}
#ifdef G
if (F && drv) {
add_to_str(&hdr, &l, "; ");
add_to_str(&hdr, &l, drv->name);
}
#endif
add_to_str(&hdr, &l, ")\r\n");
}
else {
add_to_str(&hdr, &l, http_bugs.fake_useragent);
add_to_str(&hdr, &l, "\r\n");
}
switch (http_bugs.referer)
{
case REFERER_FAKE:
add_to_str(&hdr, &l, "Referer: ");
add_to_str(&hdr, &l, http_bugs.fake_referer);
add_to_str(&hdr, &l, "\r\n");
break;
case REFERER_SAME_URL:
add_to_str(&hdr, &l, "Referer: ");
add_url_to_str(&hdr, &l, host);
add_to_str(&hdr, &l, "\r\n");
break;
case REFERER_REAL_SAME_SERVER:
{
unsigned char *h, *j;
int brk = 1;
if ((h = get_host_name(host))) {
if ((j = get_host_name(c->prev_url))) {
if (!strcasecmp(h, j)) brk = 0;
mem_free(j);
}
mem_free(h);
}
if (brk) break;
/* fall through */
}
case REFERER_REAL:
{
unsigned char *ref;
unsigned char *user, *ins;
int ulen;
if (!(c->prev_url)) break; /* no referrer */
ref = stracpy(c->prev_url);
if (!parse_url(ref, NULL, &user, &ulen, NULL, NULL, &ins, NULL, NULL, NULL, NULL, NULL, NULL) && ulen && ins) {
memmove(user, ins, strlen(ins) + 1);
}
add_to_str(&hdr, &l, "Referer: ");
add_url_to_str(&hdr, &l, ref);
add_to_str(&hdr, &l, "\r\n");
mem_free(ref);
}
break;
}
add_to_str(&hdr, &l, "Accept: */*\r\n");
#if defined(HAVE_ZLIB) || defined(HAVE_BZIP2)
if (!http_bugs.no_compression && !(info->bl_flags & BL_NO_COMPRESSION)) {
int q = strlen(c->url);
if (q >= 2 && !strcasecmp(c->url + q - 2, ".Z")) goto skip_compress;
if (q >= 3 && !strcasecmp(c->url + q - 3, ".gz")) goto skip_compress;
if (q >= 4 && !strcasecmp(c->url + q - 4, ".bz2")) goto skip_compress;
add_to_str(&hdr, &l, "Accept-Encoding: ");
#if defined(HAVE_ZLIB)
add_to_str(&hdr, &l, "gzip, deflate, ");
#endif
#if defined(HAVE_BZIP2)
add_to_str(&hdr, &l, "bzip2, ");
#endif
hdr[l-2] = '\r';
hdr[l-1] = '\n';
skip_compress:
;
}
#endif
if (!(accept_charset)) {
int i;
unsigned char *cs, *ac;
int aclen = 0;
ac = init_str();
for (i = 0; (cs = get_cp_mime_name(i)); i++) {
if (aclen) add_to_str(&ac, &aclen, ", ");
else add_to_str(&ac, &aclen, "Accept-Charset: ");
add_to_str(&ac, &aclen, cs);
}
if (aclen) add_to_str(&ac, &aclen, "\r\n");
if ((accept_charset = malloc(strlen(ac) + 1))) strcpy(accept_charset, ac);
else accept_charset = "";
mem_free(ac);
}
if (!(info->bl_flags & BL_NO_CHARSET) && !http_bugs.no_accept_charset) add_to_str(&hdr, &l, accept_charset);
if (!(info->bl_flags & BL_NO_ACCEPT_LANGUAGE)) {
add_to_str(&hdr, &l, "Accept-Language: ");
la = l;
add_to_str(&hdr, &l, _(TEXT(T__ACCEPT_LANGUAGE), NULL));
add_to_str(&hdr, &l, ", ");
if (!strstr(hdr + la, "en,") && !strstr(hdr + la, "en;")) add_to_str(&hdr, &l, "en;q=0.2, ");
add_to_str(&hdr, &l, "*;q=0.1\r\n");
}
if (!http10) {
if (upcase(c->url[0]) != 'P') add_to_str(&hdr, &l, "Connection: ");
else add_to_str(&hdr, &l, "Proxy-Connection: ");
if (!post || !http_bugs.bug_post_no_keepalive) add_to_str(&hdr, &l, "Keep-Alive\r\n");
else add_to_str(&hdr, &l, "close\r\n");
}
if ((e = c->cache)) {
int code, vers;
if (get_http_code(e->head, &code, &vers) || code >= 400) goto skip_ifmod_and_range;
if (!e->incomplete && e->head && c->no_cache <= NC_IF_MOD) {
unsigned char *m;
if (e->last_modified) m = stracpy(e->last_modified);
else if ((m = parse_http_header(e->head, "Date", NULL))) ;
else if ((m = parse_http_header(e->head, "Expires", NULL))) ;
else goto skip_ifmod;
add_to_str(&hdr, &l, "If-Modified-Since: ");
add_to_str(&hdr, &l, m);
add_to_str(&hdr, &l, "\r\n");
mem_free(m);
}
skip_ifmod:
;
}
if (c->from && (c->est_length == -1 || c->from < c->est_length) && c->no_cache < NC_IF_MOD && !(info->bl_flags & BL_NO_RANGE)) {
/* If the cached entity is compressed and we turned off compression,
request the whole file */
if ((info->bl_flags & BL_NO_COMPRESSION || http_bugs.no_compression) && e) {
unsigned char *d;
if ((d = parse_http_header(e->head, "Transfer-Encoding", NULL))) {
mem_free(d);
goto skip_range;
}
}
add_to_str(&hdr, &l, "Range: bytes=");
add_num_to_str(&hdr, &l, c->from);
add_to_str(&hdr, &l, "-\r\n");
skip_range:
;
}
skip_ifmod_and_range:
if (c->no_cache >= NC_PR_NO_CACHE) add_to_str(&hdr, &l, "Pragma: no-cache\r\nCache-Control: no-cache\r\n");
if ((h = get_auth_string(c->url))) {
add_to_str(&hdr, &l, h);
mem_free(h);
}
if (post) {
unsigned char *pd = strchr(post, '\n');
if (pd) {
add_to_str(&hdr, &l, "Content-Type: ");
add_bytes_to_str(&hdr, &l, post, pd - post);
add_to_str(&hdr, &l, "\r\n");
post = pd + 1;
}
add_to_str(&hdr, &l, "Content-Length: ");
add_num_to_str(&hdr, &l, strlen(post) / 2);
add_to_str(&hdr, &l, "\r\n");
}
send_cookies(&hdr, &l, host);
add_to_str(&hdr, &l, "\r\n");
if (post) {
while (post[0] && post[1]) {
int h1, h2;
h1 = post[0] <= '9' ? (unsigned)post[0] - '0' : post[0] >= 'A' ? upcase(post[0]) - 'A' + 10 : 0;
if (h1 < 0 || h1 >= 16) h1 = 0;
h2 = post[1] <= '9' ? (unsigned)post[1] - '0' : post[1] >= 'A' ? upcase(post[1]) - 'A' + 10 : 0;
if (h2 < 0 || h2 >= 16) h2 = 0;
add_chr_to_str(&hdr, &l, h1 * 16 + h2);
post += 2;
}
}
write_to_socket(c, c->sock1, hdr, l, http_get_header);
mem_free(hdr);
setcstate(c, S_SENT);
}
static struct ftp_connection_info *add_file_cmd_to_str(struct connection *c)
{
unsigned char *d = get_url_data(c->url);
unsigned char *de;
int del;
unsigned char port_string[50];
struct ftp_connection_info *inf, *inf2;
unsigned char *s;
int l;
if (!d) {
internal("get_url_data failed");
setcstate(c, S_INTERNAL);
abort_connection(c);
return NULL;
}
de = init_str(), del = 0;
add_conv_str(&de, &del, d, strlen(cast_const_char d), -2);
d = de;
inf = mem_alloc(sizeof(struct ftp_connection_info));
memset(inf, 0, sizeof(struct ftp_connection_info));
l = 0;
s = init_str();
inf->pasv = ftp_options.passive_ftp;
#ifdef LINKS_2
if (*c->socks_proxy) inf->pasv = 1;
if (ftp_options.eprt_epsv || is_ipv6(c->sock1)) inf->eprt_epsv = 1;
#endif
c->info = inf;
if (!inf->pasv) {
int ps;
#ifdef SUPPORT_IPV6
if (is_ipv6(c->sock1)) {
ps = get_pasv_socket_ipv6(c, c->sock1, &c->sock2, port_string);
if (ps) {
mem_free(d);
mem_free(s);
return NULL;
}
} else
#endif
{
unsigned char pc[6];
ps = get_pasv_socket(c, c->sock1, &c->sock2, pc);
if (ps) {
mem_free(d);
mem_free(s);
return NULL;
}
if (inf->eprt_epsv)
sprintf(cast_char port_string, "|1|%d.%d.%d.%d|%d|", pc[0], pc[1], pc[2], pc[3], (pc[4] << 8) | pc[5]);
else
sprintf(cast_char port_string, "%d,%d,%d,%d,%d,%d", pc[0], pc[1], pc[2], pc[3], pc[4], pc[5]);
}
if (strlen(cast_const_char port_string) >= sizeof(port_string))
internal("buffer overflow in get_pasv_socket_ipv6: %d > %d", (int)strlen(cast_const_char port_string), (int)sizeof(port_string));
}
#ifdef HAVE_IPTOS
if (ftp_options.set_tos) {
int rx;
int on = IPTOS_THROUGHPUT;
EINTRLOOP(rx, setsockopt(c->sock2, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)));
}
#endif
if (!(de = cast_uchar strchr(cast_const_char d, POST_CHAR))) de = d + strlen(cast_const_char d);
if (d == de || de[-1] == '/') {
inf->dir = 1;
inf->pending_commands = 4;
add_to_str(&s, &l, cast_uchar "TYPE A\r\n");
add_port_pasv(&s, &l, inf, port_string);
add_to_str(&s, &l, cast_uchar "CWD /");
add_bytes_to_str(&s, &l, d, de - d);
add_to_str(&s, &l, cast_uchar "\r\nLIST\r\n");
c->from = 0;
} else {
inf->dir = 0;
inf->pending_commands = 3;
add_to_str(&s, &l, cast_uchar "TYPE I\r\n");
add_port_pasv(&s, &l, inf, port_string);
if (c->from && c->no_cache < NC_IF_MOD) {
add_to_str(&s, &l, cast_uchar "REST ");
add_num_to_str(&s, &l, c->from);
add_to_str(&s, &l, cast_uchar "\r\n");
inf->rest_sent = 1;
inf->pending_commands++;
} else c->from = 0;
add_to_str(&s, &l, cast_uchar "RETR /");
add_bytes_to_str(&s, &l, d, de - d);
add_to_str(&s, &l, cast_uchar "\r\n");
}
inf->opc = inf->pending_commands;
if ((unsigned)l > MAXINT - sizeof(struct ftp_connection_info) - 1) overalloc();
inf2 = mem_realloc(inf, sizeof(struct ftp_connection_info) + l + 1);
strcpy(cast_char (inf = inf2)->cmdbuf, cast_const_char s);
mem_free(s);
c->info = inf;
mem_free(d);
return inf;
}
struct ftp_connection_info *add_file_cmd_to_str(struct connection *c)
{
unsigned char *d = get_url_data(c->url);
unsigned char *de;
int del;
unsigned char pc[6];
int ps;
struct ftp_connection_info *inf, *inf2;
unsigned char *s;
int l;
if (!d) {
internal("get_url_data failed");
setcstate(c, S_INTERNAL);
abort_connection(c);
return NULL;
}
de = init_str(), del = 0;
add_conv_str(&de, &del, d, strlen(d), -2);
d = de;
inf = mem_alloc(sizeof(struct ftp_connection_info));
memset(inf, 0, sizeof(struct ftp_connection_info));
l = 0;
s = init_str();
inf->pasv = ftp_options.passive_ftp;
if (*c->socks_proxy) inf->pasv = 1;
c->info = inf;
if (!inf->pasv) if ((ps = get_pasv_socket(c, c->sock1, &c->sock2, pc))) {
mem_free(d);
return NULL;
}
#ifdef HAVE_IPTOS
if (ftp_options.set_tos) {
int on = IPTOS_THROUGHPUT;
setsockopt(c->sock2, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int));
}
#endif
if (!(de = strchr(d, POST_CHAR))) de = d + strlen(d);
if (d == de || de[-1] == '/') {
inf->dir = 1;
inf->pending_commands = 4;
add_to_str(&s, &l, "TYPE A\r\n");
if (!inf->pasv) {
add_to_str(&s, &l, "PORT ");
add_num_to_str(&s, &l, pc[0]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[1]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[2]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[3]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[4]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[5]);
add_to_str(&s, &l, "\r\n");
} else {
add_to_str(&s, &l, "PASV\r\n");
}
add_to_str(&s, &l, "CWD /");
add_bytes_to_str(&s, &l, d, de - d);
add_to_str(&s, &l, "\r\nLIST\r\n");
c->from = 0;
} else {
inf->dir = 0;
inf->pending_commands = 3;
add_to_str(&s, &l, "TYPE I\r\n");
if (!inf->pasv) {
add_to_str(&s, &l, "PORT ");
add_num_to_str(&s, &l, pc[0]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[1]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[2]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[3]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[4]);
add_chr_to_str(&s, &l, ',');
add_num_to_str(&s, &l, pc[5]);
add_to_str(&s, &l, "\r\n");
} else {
add_to_str(&s, &l, "PASV\r\n");
}
if (c->from && c->no_cache < NC_IF_MOD) {
add_to_str(&s, &l, "REST ");
add_num_to_str(&s, &l, c->from);
add_to_str(&s, &l, "\r\n");
inf->rest_sent = 1;
inf->pending_commands++;
} else c->from = 0;
add_to_str(&s, &l, "RETR /");
add_bytes_to_str(&s, &l, d, de - d);
add_to_str(&s, &l, "\r\n");
}
inf->opc = inf->pending_commands;
if ((unsigned)l > MAXINT - sizeof(struct ftp_connection_info) - 1) overalloc();
inf2 = mem_realloc(inf, sizeof(struct ftp_connection_info) + l + 1);
strcpy((inf = inf2)->cmdbuf, s);
mem_free(s);
c->info = inf;
mem_free(d);
return inf;
}
