#include "curl_setup.h"
#ifndef CURL_DISABLE_POP3
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_UTSNAME_H
#include <sys/utsname.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef __VMS
#include <in.h>
#include <inet.h>
#endif
#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
#undef in_addr_t
#define in_addr_t unsigned long
#endif
#include <curl/curl.h>
#include "urldata.h"
#include "sendf.h"
#include "if2ip.h"
#include "hostip.h"
#include "progress.h"
#include "transfer.h"
#include "escape.h"
#include "http.h"
#include "socks.h"
#include "pop3.h"
#include "strtoofft.h"
#include "strequal.h"
#include "sslgen.h"
#include "connect.h"
#include "strerror.h"
#include "select.h"
#include "multiif.h"
#include "url.h"
#include "rawstr.h"
#include "curl_sasl.h"
#include "curl_md5.h"
#include "warnless.h"
#define _MPRINTF_REPLACE
#include <curl/mprintf.h>
#include "curl_memory.h"
#include "memdebug.h"
static CURLcode pop3_parse_url_path(struct connectdata *conn);
static CURLcode pop3_parse_custom_request(struct connectdata *conn);
static CURLcode pop3_regular_transfer(struct connectdata *conn, bool *done);
static CURLcode pop3_do(struct connectdata *conn, bool *done);
static CURLcode pop3_done(struct connectdata *conn, CURLcode status,
bool premature);
static CURLcode pop3_connect(struct connectdata *conn, bool *done);
static CURLcode pop3_disconnect(struct connectdata *conn, bool dead);
static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done);
static int pop3_getsock(struct connectdata *conn, curl_socket_t *socks,
int numsocks);
static CURLcode pop3_doing(struct connectdata *conn, bool *dophase_done);
static CURLcode pop3_setup_connection(struct connectdata *conn);
const struct Curl_handler Curl_handler_pop3 = {
"POP3",
pop3_setup_connection,
pop3_do,
pop3_done,
ZERO_NULL,
pop3_connect,
pop3_multi_statemach,
pop3_doing,
pop3_getsock,
pop3_getsock,
ZERO_NULL,
ZERO_NULL,
pop3_disconnect,
ZERO_NULL,
PORT_POP3,
CURLPROTO_POP3,
PROTOPT_CLOSEACTION | PROTOPT_NOURLQUERY
};
#ifdef USE_SSL
const struct Curl_handler Curl_handler_pop3s = {
"POP3S",
pop3_setup_connection,
pop3_do,
pop3_done,
ZERO_NULL,
pop3_connect,
pop3_multi_statemach,
pop3_doing,
pop3_getsock,
pop3_getsock,
ZERO_NULL,
ZERO_NULL,
pop3_disconnect,
ZERO_NULL,
PORT_POP3S,
CURLPROTO_POP3 | CURLPROTO_POP3S,
PROTOPT_CLOSEACTION | PROTOPT_SSL
| PROTOPT_NOURLQUERY
};
#endif
#ifndef CURL_DISABLE_HTTP
static const struct Curl_handler Curl_handler_pop3_proxy = {
"POP3",
ZERO_NULL,
Curl_http,
Curl_http_done,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
PORT_POP3,
CURLPROTO_HTTP,
PROTOPT_NONE
};
#ifdef USE_SSL
static const struct Curl_handler Curl_handler_pop3s_proxy = {
"POP3S",
ZERO_NULL,
Curl_http,
Curl_http_done,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
PORT_POP3S,
CURLPROTO_HTTP,
PROTOPT_NONE
};
#endif
#endif
#ifdef USE_SSL
static void pop3_to_pop3s(struct connectdata *conn)
{
conn->handler = &Curl_handler_pop3s;
}
#else
#define pop3_to_pop3s(x) Curl_nop_stmt
#endif
static bool pop3_endofresp(struct connectdata *conn, char *line, size_t len,
int *resp)
{
struct pop3_conn *pop3c = &conn->proto.pop3c;
size_t wordlen;
size_t i;
if(len >= 4 && !memcmp("-ERR", line, 4)) {
*resp = '-';
return TRUE;
}
if(pop3c->state == POP3_SERVERGREET) {
if(len >= 3 && line[len - 3] == '>') {
for(i = 0; i < len - 3; ++i) {
if(line[i] == '<') {
size_t timestamplen = len - 2 - i;
pop3c->apoptimestamp = (char *)calloc(1, timestamplen + 1);
if(!pop3c->apoptimestamp)
break;
memcpy(pop3c->apoptimestamp, line + i, timestamplen);
pop3c->apoptimestamp[timestamplen] = '\0';
break;
}
}
}
}
else if(pop3c->state == POP3_CAPA) {
if(len >= 1 && !memcmp(line, ".", 1)) {
*resp = '+';
return TRUE;
}
if(len >= 4 && !memcmp(line, "STLS", 4))
pop3c->tls_supported = TRUE;
else if(len >= 4 && !memcmp(line, "USER", 4))
pop3c->authtypes |= POP3_TYPE_CLEARTEXT;
else if(len >= 4 && !memcmp(line, "APOP", 4))
pop3c->authtypes |= POP3_TYPE_APOP;
else if(len >= 5 && !memcmp(line, "SASL ", 5)) {
pop3c->authtypes |= POP3_TYPE_SASL;
line += 5;
len -= 5;
for(;;) {
while(len &&
(*line == ' ' || *line == '\t' ||
*line == '\r' || *line == '\n')) {
line++;
len--;
}
if(!len)
break;
for(wordlen = 0; wordlen < len && line[wordlen] != ' ' &&
line[wordlen] != '\t' && line[wordlen] != '\r' &&
line[wordlen] != '\n';)
wordlen++;
if(wordlen == 5 && !memcmp(line, "LOGIN", 5))
pop3c->authmechs |= SASL_MECH_LOGIN;
else if(wordlen == 5 && !memcmp(line, "PLAIN", 5))
pop3c->authmechs |= SASL_MECH_PLAIN;
else if(wordlen == 8 && !memcmp(line, "CRAM-MD5", 8))
pop3c->authmechs |= SASL_MECH_CRAM_MD5;
else if(wordlen == 10 && !memcmp(line, "DIGEST-MD5", 10))
pop3c->authmechs |= SASL_MECH_DIGEST_MD5;
else if(wordlen == 6 && !memcmp(line, "GSSAPI", 6))
pop3c->authmechs |= SASL_MECH_GSSAPI;
else if(wordlen == 8 && !memcmp(line, "EXTERNAL", 8))
pop3c->authmechs |= SASL_MECH_EXTERNAL;
else if(wordlen == 4 && !memcmp(line, "NTLM", 4))
pop3c->authmechs |= SASL_MECH_NTLM;
line += wordlen;
len -= wordlen;
}
}
return FALSE;
}
if((len >= 3 && !memcmp("+OK", line, 3)) ||
(len >= 1 && !memcmp("+", line, 1))) {
*resp = '+';
return TRUE;
}
return FALSE;
}
static void state(struct connectdata *conn, pop3state newstate)
{
struct pop3_conn *pop3c = &conn->proto.pop3c;
#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
static const char * const names[] = {
"STOP",
"SERVERGREET",
"CAPA",
"STARTTLS",
"UPGRADETLS",
"AUTH_PLAIN",
"AUTH_LOGIN",
"AUTH_LOGIN_PASSWD",
"AUTH_CRAMMD5",
"AUTH_DIGESTMD5",
"AUTH_DIGESTMD5_RESP",
"AUTH_NTLM",
"AUTH_NTLM_TYPE2MSG",
"AUTH_FINAL",
"APOP",
"USER",
"PASS",
"COMMAND",
"QUIT",
};
if(pop3c->state != newstate)
infof(conn->data, "POP3 %p state change from %s to %s\n",
pop3c, names[pop3c->state], names[newstate]);
#endif
pop3c->state = newstate;
}
static CURLcode pop3_state_capa(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct pop3_conn *pop3c = &conn->proto.pop3c;
pop3c->authmechs = 0;
pop3c->authused = 0;
pop3c->tls_supported = FALSE;
result = Curl_pp_sendf(&pop3c->pp, "CAPA");
if(!result)
state(conn, POP3_CAPA);
return result;
}
static CURLcode pop3_state_starttls(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "STLS");
if(!result)
state(conn, POP3_STARTTLS);
return result;
}
static CURLcode pop3_state_upgrade_tls(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct pop3_conn *pop3c = &conn->proto.pop3c;
result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &pop3c->ssldone);
if(!result) {
if(pop3c->state != POP3_UPGRADETLS)
state(conn, POP3_UPGRADETLS);
if(pop3c->ssldone) {
pop3_to_pop3s(conn);
result = pop3_state_capa(conn);
}
}
return result;
}
static CURLcode pop3_state_user(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
if(!conn->bits.user_passwd) {
state(conn, POP3_STOP);
return result;
}
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "USER %s",
conn->user ? conn->user : "");
if(!result)
state(conn, POP3_USER);
return result;
}
#ifndef CURL_DISABLE_CRYPTO_AUTH
static CURLcode pop3_state_apop(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct pop3_conn *pop3c = &conn->proto.pop3c;
size_t i;
MD5_context *ctxt;
unsigned char digest[MD5_DIGEST_LEN];
char secret[2 * MD5_DIGEST_LEN + 1];
if(!conn->bits.user_passwd) {
state(conn, POP3_STOP);
return result;
}
ctxt = Curl_MD5_init(Curl_DIGEST_MD5);
if(!ctxt)
return CURLE_OUT_OF_MEMORY;
Curl_MD5_update(ctxt, (const unsigned char *) pop3c->apoptimestamp,
curlx_uztoui(strlen(pop3c->apoptimestamp)));
Curl_MD5_update(ctxt, (const unsigned char *) conn->passwd,
curlx_uztoui(strlen(conn->passwd)));
Curl_MD5_final(ctxt, digest);
for(i = 0; i < MD5_DIGEST_LEN; i++)
snprintf(&secret[2 * i], 3, "%02x", digest[i]);
result = Curl_pp_sendf(&pop3c->pp, "APOP %s %s", conn->user, secret);
if(!result)
state(conn, POP3_APOP);
return result;
}
#endif
static CURLcode pop3_authenticate(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct pop3_conn *pop3c = &conn->proto.pop3c;
const char *mech = NULL;
pop3state authstate = POP3_STOP;
if(!conn->bits.user_passwd) {
state(conn, POP3_STOP);
return result;
}
if(pop3c->authtypes & POP3_TYPE_SASL) {
#ifndef CURL_DISABLE_CRYPTO_AUTH
if(pop3c->authmechs & SASL_MECH_DIGEST_MD5) {
mech = "DIGEST-MD5";
authstate = POP3_AUTH_DIGESTMD5;
pop3c->authused = SASL_MECH_DIGEST_MD5;
}
else if(pop3c->authmechs & SASL_MECH_CRAM_MD5) {
mech = "CRAM-MD5";
authstate = POP3_AUTH_CRAMMD5;
pop3c->authused = SASL_MECH_CRAM_MD5;
}
else
#endif
#ifdef USE_NTLM
if(pop3c->authmechs & SASL_MECH_NTLM) {
mech = "NTLM";
authstate = POP3_AUTH_NTLM;
pop3c->authused = SASL_MECH_NTLM;
}
else
#endif
if(pop3c->authmechs & SASL_MECH_LOGIN) {
mech = "LOGIN";
authstate = POP3_AUTH_LOGIN;
pop3c->authused = SASL_MECH_LOGIN;
}
else if(pop3c->authmechs & SASL_MECH_PLAIN) {
mech = "PLAIN";
authstate = POP3_AUTH_PLAIN;
pop3c->authused = SASL_MECH_PLAIN;
}
}
if(mech) {
result = Curl_pp_sendf(&pop3c->pp, "AUTH %s", mech);
if(!result)
state(conn, authstate);
}
#ifndef CURL_DISABLE_CRYPTO_AUTH
else if(pop3c->authtypes & POP3_TYPE_APOP)
result = pop3_state_apop(conn);
#endif
else if(pop3c->authtypes & POP3_TYPE_CLEARTEXT)
result = pop3_state_user(conn);
else {
infof(conn->data, "No known authentication mechanisms supported!\n");
result = CURLE_LOGIN_DENIED;
}
return result;
}
static CURLcode pop3_state_servergreet_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate;
if(pop3code != '+') {
failf(data, "Got unexpected pop3-server response");
return CURLE_FTP_WEIRD_SERVER_REPLY;
}
result = pop3_state_capa(conn);
return result;
}
static CURLcode pop3_state_capa_resp(struct connectdata *conn, int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
struct pop3_conn *pop3c = &conn->proto.pop3c;
(void)instate;
if(pop3code != '+')
result = pop3_state_user(conn);
else if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
if(pop3c->tls_supported)
result = pop3_state_starttls(conn);
else if(data->set.use_ssl == CURLUSESSL_TRY)
result = pop3_authenticate(conn);
else {
failf(data, "STLS not supported.");
result = CURLE_USE_SSL_FAILED;
}
}
else
result = pop3_authenticate(conn);
return result;
}
static CURLcode pop3_state_starttls_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate;
if(pop3code != '+') {
if(data->set.use_ssl != CURLUSESSL_TRY) {
failf(data, "STARTTLS denied. %c", pop3code);
result = CURLE_USE_SSL_FAILED;
}
else
result = pop3_authenticate(conn);
}
else
result = pop3_state_upgrade_tls(conn);
return result;
}
static CURLcode pop3_state_auth_plain_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
size_t len = 0;
char *plainauth = NULL;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied. %c", pop3code);
result = CURLE_LOGIN_DENIED;
}
else {
result = Curl_sasl_create_plain_message(data, conn->user, conn->passwd,
&plainauth, &len);
if(!result) {
if(plainauth) {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", plainauth);
if(!result)
state(conn, POP3_AUTH_FINAL);
}
Curl_safefree(plainauth);
}
}
return result;
}
static CURLcode pop3_state_auth_login_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
size_t len = 0;
char *authuser = NULL;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied: %d", pop3code);
result = CURLE_LOGIN_DENIED;
}
else {
result = Curl_sasl_create_login_message(data, conn->user,
&authuser, &len);
if(!result) {
if(authuser) {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", authuser);
if(!result)
state(conn, POP3_AUTH_LOGIN_PASSWD);
}
Curl_safefree(authuser);
}
}
return result;
}
static CURLcode pop3_state_auth_login_password_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
size_t len = 0;
char *authpasswd = NULL;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied: %d", pop3code);
result = CURLE_LOGIN_DENIED;
}
else {
result = Curl_sasl_create_login_message(data, conn->passwd,
&authpasswd, &len);
if(!result) {
if(authpasswd) {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", authpasswd);
if(!result)
state(conn, POP3_AUTH_FINAL);
}
Curl_safefree(authpasswd);
}
}
return result;
}
#ifndef CURL_DISABLE_CRYPTO_AUTH
static CURLcode pop3_state_auth_cram_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
char *chlg64 = data->state.buffer;
size_t len = 0;
char *rplyb64 = NULL;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied: %d", pop3code);
return CURLE_LOGIN_DENIED;
}
for(chlg64 += 2; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
;
if(*chlg64 != '=') {
for(len = strlen(chlg64); len--;)
if(chlg64[len] != '\r' && chlg64[len] != '\n' && chlg64[len] != ' ' &&
chlg64[len] != '\t')
break;
if(++len) {
chlg64[len] = '\0';
}
}
result = Curl_sasl_create_cram_md5_message(data, chlg64, conn->user,
conn->passwd, &rplyb64, &len);
if(!result) {
if(rplyb64) {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", rplyb64);
if(!result)
state(conn, POP3_AUTH_FINAL);
}
Curl_safefree(rplyb64);
}
return result;
}
static CURLcode pop3_state_auth_digest_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
char *chlg64 = data->state.buffer;
size_t len = 0;
char *rplyb64 = NULL;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied: %d", pop3code);
return CURLE_LOGIN_DENIED;
}
for(chlg64 += 2; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
;
result = Curl_sasl_create_digest_md5_message(data, chlg64, conn->user,
conn->passwd, "pop",
&rplyb64, &len);
if(!result) {
if(rplyb64) {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", rplyb64);
if(!result)
state(conn, POP3_AUTH_DIGESTMD5_RESP);
}
Curl_safefree(rplyb64);
}
return result;
}
static CURLcode pop3_state_auth_digest_resp_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate;
if(pop3code != '+') {
failf(data, "Authentication failed: %d", pop3code);
result = CURLE_LOGIN_DENIED;
}
else {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "");
if(!result)
state(conn, POP3_AUTH_FINAL);
}
return result;
}
#endif
#ifdef USE_NTLM
static CURLcode pop3_state_auth_ntlm_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
size_t len = 0;
char *type1msg = NULL;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied: %d", pop3code);
result = CURLE_LOGIN_DENIED;
}
else {
result = Curl_sasl_create_ntlm_type1_message(conn->user, conn->passwd,
&conn->ntlm,
&type1msg, &len);
if(!result) {
if(type1msg) {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", type1msg);
if(!result)
state(conn, POP3_AUTH_NTLM_TYPE2MSG);
}
Curl_safefree(type1msg);
}
}
return result;
}
static CURLcode pop3_state_auth_ntlm_type2msg_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
size_t len = 0;
char *type3msg = NULL;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied: %d", pop3code);
result = CURLE_LOGIN_DENIED;
}
else {
result = Curl_sasl_create_ntlm_type3_message(data,
data->state.buffer + 2,
conn->user, conn->passwd,
&conn->ntlm,
&type3msg, &len);
if(!result) {
if(type3msg) {
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", type3msg);
if(!result)
state(conn, POP3_AUTH_FINAL);
}
Curl_safefree(type3msg);
}
}
return result;
}
#endif
static CURLcode pop3_state_auth_final_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate;
if(pop3code != '+') {
failf(data, "Authentication failed: %d", pop3code);
result = CURLE_LOGIN_DENIED;
}
else
state(conn, POP3_STOP);
return result;
}
#ifndef CURL_DISABLE_CRYPTO_AUTH
static CURLcode pop3_state_apop_resp(struct connectdata *conn, int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate;
if(pop3code != '+') {
failf(data, "Authentication failed: %d", pop3code);
result = CURLE_LOGIN_DENIED;
}
else
state(conn, POP3_STOP);
return result;
}
#endif
static CURLcode pop3_state_user_resp(struct connectdata *conn, int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied. %c", pop3code);
result = CURLE_LOGIN_DENIED;
}
else
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "PASS %s",
conn->passwd ? conn->passwd : "");
if(!result)
state(conn, POP3_PASS);
return result;
}
static CURLcode pop3_state_pass_resp(struct connectdata *conn, int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate;
if(pop3code != '+') {
failf(data, "Access denied. %c", pop3code);
result = CURLE_LOGIN_DENIED;
}
else
state(conn, POP3_STOP);
return result;
}
static CURLcode pop3_command(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
struct POP3 *pop3 = data->state.proto.pop3;
const char *command = NULL;
if(pop3->id[0] == '\0' || conn->data->set.ftp_list_only) {
command = "LIST";
if(pop3->id[0] != '\0')
pop3->transfer = FTPTRANSFER_INFO;
}
else
command = "RETR";
if(pop3->id[0] != '\0')
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s %s",
(pop3->custom && pop3->custom[0] != '\0' ?
pop3->custom : command), pop3->id);
else
result = Curl_pp_sendf(&conn->proto.pop3c.pp,
(pop3->custom && pop3->custom[0] != '\0' ?
pop3->custom : command));
if(!result)
state(conn, POP3_COMMAND);
return result;
}
static CURLcode pop3_state_command_resp(struct connectdata *conn,
int pop3code,
pop3state instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
struct POP3 *pop3 = data->state.proto.pop3;
struct pop3_conn *pop3c = &conn->proto.pop3c;
struct pingpong *pp = &pop3c->pp;
(void)instate;
if(pop3code != '+') {
state(conn, POP3_STOP);
return CURLE_RECV_ERROR;
}
pop3c->eob = 2;
pop3c->strip = 2;
if(pop3->transfer == FTPTRANSFER_BODY) {
Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, NULL, -1, NULL);
if(pp->cache) {
if(!data->set.opt_no_body) {
result = Curl_pop3_write(conn, pp->cache, pp->cache_size);
if(result)
return result;
}
Curl_safefree(pp->cache);
pp->cache_size = 0;
}
}
state(conn, POP3_STOP);
return result;
}
static CURLcode pop3_statemach_act(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
curl_socket_t sock = conn->sock[FIRSTSOCKET];
int pop3code;
struct pop3_conn *pop3c = &conn->proto.pop3c;
struct pingpong *pp = &pop3c->pp;
size_t nread = 0;
if(pop3c->state == POP3_UPGRADETLS)
return pop3_state_upgrade_tls(conn);
if(pp->sendleft)
return Curl_pp_flushsend(pp);
result = Curl_pp_readresp(sock, pp, &pop3code, &nread);
if(result)
return result;
if(pop3code) {
switch(pop3c->state) {
case POP3_SERVERGREET:
result = pop3_state_servergreet_resp(conn, pop3code, pop3c->state);
break;
case POP3_CAPA:
result = pop3_state_capa_resp(conn, pop3code, pop3c->state);
break;
case POP3_STARTTLS:
result = pop3_state_starttls_resp(conn, pop3code, pop3c->state);
break;
case POP3_AUTH_PLAIN:
result = pop3_state_auth_plain_resp(conn, pop3code, pop3c->state);
break;
case POP3_AUTH_LOGIN:
result = pop3_state_auth_login_resp(conn, pop3code, pop3c->state);
break;
case POP3_AUTH_LOGIN_PASSWD:
result = pop3_state_auth_login_password_resp(conn, pop3code,
pop3c->state);
break;
#ifndef CURL_DISABLE_CRYPTO_AUTH
case POP3_AUTH_CRAMMD5:
result = pop3_state_auth_cram_resp(conn, pop3code, pop3c->state);
break;
case POP3_AUTH_DIGESTMD5:
result = pop3_state_auth_digest_resp(conn, pop3code, pop3c->state);
break;
case POP3_AUTH_DIGESTMD5_RESP:
result = pop3_state_auth_digest_resp_resp(conn, pop3code, pop3c->state);
break;
#endif
#ifdef USE_NTLM
case POP3_AUTH_NTLM:
result = pop3_state_auth_ntlm_resp(conn, pop3code, pop3c->state);
break;
case POP3_AUTH_NTLM_TYPE2MSG:
result = pop3_state_auth_ntlm_type2msg_resp(conn, pop3code,
pop3c->state);
break;
#endif
case POP3_AUTH_FINAL:
result = pop3_state_auth_final_resp(conn, pop3code, pop3c->state);
break;
#ifndef CURL_DISABLE_CRYPTO_AUTH
case POP3_APOP:
result = pop3_state_apop_resp(conn, pop3code, pop3c->state);
break;
#endif
case POP3_USER:
result = pop3_state_user_resp(conn, pop3code, pop3c->state);
break;
case POP3_PASS:
result = pop3_state_pass_resp(conn, pop3code, pop3c->state);
break;
case POP3_COMMAND:
result = pop3_state_command_resp(conn, pop3code, pop3c->state);
break;
case POP3_QUIT:
default:
state(conn, POP3_STOP);
break;
}
}
return result;
}
static CURLcode pop3_multi_statemach(struct connectdata *conn, bool *done)
{
CURLcode result = CURLE_OK;
struct pop3_conn *pop3c = &conn->proto.pop3c;
if((conn->handler->flags & PROTOPT_SSL) && !pop3c->ssldone)
result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &pop3c->ssldone);
else
result = Curl_pp_statemach(&pop3c->pp, FALSE);
*done = (pop3c->state == POP3_STOP) ? TRUE : FALSE;
return result;
}
static CURLcode pop3_block_statemach(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct pop3_conn *pop3c = &conn->proto.pop3c;
while(pop3c->state != POP3_STOP && !result)
result = Curl_pp_statemach(&pop3c->pp, TRUE);
return result;
}
static CURLcode pop3_init(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
struct POP3 *pop3 = data->state.proto.pop3;
if(!pop3) {
pop3 = data->state.proto.pop3 = calloc(sizeof(struct POP3), 1);
if(!pop3)
result = CURLE_OUT_OF_MEMORY;
}
return result;
}
static int pop3_getsock(struct connectdata *conn, curl_socket_t *socks,
int numsocks)
{
return Curl_pp_getsock(&conn->proto.pop3c.pp, socks, numsocks);
}
static CURLcode pop3_connect(struct connectdata *conn, bool *done)
{
CURLcode result = CURLE_OK;
struct pop3_conn *pop3c = &conn->proto.pop3c;
struct pingpong *pp = &pop3c->pp;
*done = FALSE;
Curl_reset_reqproto(conn);
result = pop3_init(conn);
if(result)
return result;
conn->bits.close = FALSE;
pp->response_time = RESP_TIMEOUT;
pp->statemach_act = pop3_statemach_act;
pp->endofresp = pop3_endofresp;
pp->conn = conn;
Curl_pp_init(pp);
state(conn, POP3_SERVERGREET);
result = pop3_multi_statemach(conn, done);
return result;
}
static CURLcode pop3_done(struct connectdata *conn, CURLcode status,
bool premature)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
struct POP3 *pop3 = data->state.proto.pop3;
(void)premature;
if(!pop3)
return CURLE_OK;
if(status) {
conn->bits.close = TRUE;
result = status;
}
Curl_safefree(pop3->id);
Curl_safefree(pop3->custom);
pop3->transfer = FTPTRANSFER_BODY;
return result;
}
static CURLcode pop3_perform(struct connectdata *conn, bool *connected,
bool *dophase_done)
{
CURLcode result = CURLE_OK;
DEBUGF(infof(conn->data, "DO phase starts\n"));
if(conn->data->set.opt_no_body) {
struct POP3 *pop3 = conn->data->state.proto.pop3;
pop3->transfer = FTPTRANSFER_INFO;
}
*dophase_done = FALSE;
result = pop3_command(conn);
if(result)
return result;
result = pop3_multi_statemach(conn, dophase_done);
*connected = conn->bits.tcpconnect[FIRSTSOCKET];
if(*dophase_done)
DEBUGF(infof(conn->data, "DO phase is complete\n"));
return result;
}
static CURLcode pop3_do(struct connectdata *conn, bool *done)
{
CURLcode result = CURLE_OK;
*done = FALSE;
Curl_reset_reqproto(conn);
result = pop3_init(conn);
if(result)
return result;
result = pop3_parse_url_path(conn);
if(result)
return result;
result = pop3_parse_custom_request(conn);
if(result)
return result;
result = pop3_regular_transfer(conn, done);
return result;
}
static CURLcode pop3_quit(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
result = Curl_pp_sendf(&conn->proto.pop3c.pp, "QUIT");
if(!result)
state(conn, POP3_QUIT);
return result;
}
static CURLcode pop3_disconnect(struct connectdata *conn,
bool dead_connection)
{
struct pop3_conn *pop3c = &conn->proto.pop3c;
if(!dead_connection && pop3c->pp.conn)
if(!pop3_quit(conn))
(void)pop3_block_statemach(conn);
Curl_pp_disconnect(&pop3c->pp);
Curl_sasl_cleanup(conn, pop3c->authused);
Curl_safefree(pop3c->apoptimestamp);
return CURLE_OK;
}
static CURLcode pop3_parse_url_path(struct connectdata *conn)
{
struct SessionHandle *data = conn->data;
struct POP3 *pop3 = data->state.proto.pop3;
const char *path = data->state.path;
return Curl_urldecode(data, path, 0, &pop3->id, NULL, TRUE);
}
static CURLcode pop3_parse_custom_request(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
struct POP3 *pop3 = data->state.proto.pop3;
const char *custom = data->set.str[STRING_CUSTOMREQUEST];
if(custom)
result = Curl_urldecode(data, custom, 0, &pop3->custom, NULL, TRUE);
return result;
}
static CURLcode pop3_dophase_done(struct connectdata *conn, bool connected)
{
(void)conn;
(void)connected;
return CURLE_OK;
}
static CURLcode pop3_doing(struct connectdata *conn, bool *dophase_done)
{
CURLcode result = pop3_multi_statemach(conn, dophase_done);
if(result)
DEBUGF(infof(conn->data, "DO phase failed\n"));
else if(*dophase_done) {
result = pop3_dophase_done(conn, FALSE );
DEBUGF(infof(conn->data, "DO phase is complete\n"));
}
return result;
}
static CURLcode pop3_regular_transfer(struct connectdata *conn,
bool *dophase_done)
{
CURLcode result = CURLE_OK;
bool connected = FALSE;
struct SessionHandle *data = conn->data;
data->req.size = -1;
Curl_pgrsSetUploadCounter(data, 0);
Curl_pgrsSetDownloadCounter(data, 0);
Curl_pgrsSetUploadSize(data, 0);
Curl_pgrsSetDownloadSize(data, 0);
result = pop3_perform(conn, &connected, dophase_done);
if(!result && *dophase_done)
result = pop3_dophase_done(conn, connected);
return result;
}
static CURLcode pop3_setup_connection(struct connectdata *conn)
{
struct SessionHandle *data = conn->data;
if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
#ifndef CURL_DISABLE_HTTP
if(conn->handler == &Curl_handler_pop3)
conn->handler = &Curl_handler_pop3_proxy;
else {
#ifdef USE_SSL
conn->handler = &Curl_handler_pop3s_proxy;
#else
failf(data, "POP3S not supported!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
conn->bits.close = FALSE;
#else
failf(data, "POP3 over http proxy requires HTTP support built-in!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
data->state.path++;
return CURLE_OK;
}
CURLcode Curl_pop3_write(struct connectdata *conn, char *str, size_t nread)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
struct SingleRequest *k = &data->req;
struct pop3_conn *pop3c = &conn->proto.pop3c;
bool strip_dot = FALSE;
size_t last = 0;
size_t i;
for(i = 0; i < nread; i++) {
size_t prev = pop3c->eob;
switch(str[i]) {
case 0x0d:
if(pop3c->eob == 0) {
pop3c->eob++;
if(i) {
result = Curl_client_write(conn, CLIENTWRITE_BODY, &str[last],
i - last);
if(result)
return result;
last = i;
}
}
else if(pop3c->eob == 3)
pop3c->eob++;
else
pop3c->eob = 1;
break;
case 0x0a:
if(pop3c->eob == 1 || pop3c->eob == 4)
pop3c->eob++;
else
pop3c->eob = 0;
break;
case 0x2e:
if(pop3c->eob == 2)
pop3c->eob++;
else if(pop3c->eob == 3) {
strip_dot = TRUE;
pop3c->eob = 0;
}
else
pop3c->eob = 0;
break;
default:
pop3c->eob = 0;
break;
}
if(prev && prev >= pop3c->eob) {
while(prev && pop3c->strip) {
prev--;
pop3c->strip--;
}
if(prev) {
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char*)POP3_EOB,
strip_dot ? prev - 1 : prev);
if(result)
return result;
last = i;
strip_dot = FALSE;
}
}
}
if(pop3c->eob == POP3_EOB_LEN) {
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)POP3_EOB, 2);
k->keepon &= ~KEEP_RECV;
pop3c->eob = 0;
return result;
}
if(pop3c->eob)
return CURLE_OK;
if(nread - last) {
result = Curl_client_write(conn, CLIENTWRITE_BODY, &str[last],
nread - last);
}
return result;
}
#endif