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smtp.c: Code policing and tidy up

This commit is contained in:
Steve Holme 2012-04-01 21:09:38 +01:00
parent 05a443adf2
commit 54866b68cd
1 changed files with 42 additions and 40 deletions
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82
lib/smtp.c
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@ -100,16 +100,15 @@
/* Local API functions */ /* Local API functions */
static CURLcode smtp_regular_transfer(struct connectdata *conn, bool *done); static CURLcode smtp_regular_transfer(struct connectdata *conn, bool *done);
static CURLcode smtp_do(struct connectdata *conn, bool *done); static CURLcode smtp_do(struct connectdata *conn, bool *done);
static CURLcode smtp_done(struct connectdata *conn, static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
CURLcode, bool premature); bool premature);
static CURLcode smtp_connect(struct connectdata *conn, bool *done); static CURLcode smtp_connect(struct connectdata *conn, bool *done);
static CURLcode smtp_disconnect(struct connectdata *conn, bool dead); static CURLcode smtp_disconnect(struct connectdata *conn, bool dead);
static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done); static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
static int smtp_getsock(struct connectdata *conn, static int smtp_getsock(struct connectdata *conn,
curl_socket_t *socks, curl_socket_t *socks,
int numsocks); int numsocks);
static CURLcode smtp_doing(struct connectdata *conn, static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done);
bool *dophase_done);
static CURLcode smtp_setup_connection(struct connectdata *conn); static CURLcode smtp_setup_connection(struct connectdata *conn);
static CURLcode smtp_state_upgrade_tls(struct connectdata *conn); static CURLcode smtp_state_upgrade_tls(struct connectdata *conn);
@ -230,7 +229,7 @@ static int smtp_endofresp(struct pingpong *pp, int *resp)
size_t wordlen; size_t wordlen;
if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2])) if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2]))
return FALSE; /* Nothing for us. */ return FALSE; /* Nothing for us */
if((result = (line[3] == ' ')) != 0) if((result = (line[3] == ' ')) != 0)
*resp = curlx_sltosi(strtol(line, NULL, 10)); *resp = curlx_sltosi(strtol(line, NULL, 10));
@ -309,8 +308,7 @@ static bool smtp_digest_get_key_value(const unsigned char *chlg,
#endif #endif
/* This is the ONLY way to change SMTP state! */ /* This is the ONLY way to change SMTP state! */
static void state(struct connectdata *conn, static void state(struct connectdata *conn, smtpstate newstate)
smtpstate newstate)
{ {
struct smtp_conn *smtpc = &conn->proto.smtpc; struct smtp_conn *smtpc = &conn->proto.smtpc;
#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS) #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
@ -394,7 +392,7 @@ static CURLcode smtp_auth_plain_data(struct connectdata *conn,
ulen = strlen(conn->user); ulen = strlen(conn->user);
plen = strlen(conn->passwd); plen = strlen(conn->passwd);
if(2 * ulen + plen + 2 > sizeof plainauth) { if(2 * ulen + plen + 2 > sizeof(plainauth)) {
*outlen = 0; *outlen = 0;
*outptr = NULL; *outptr = NULL;
return CURLE_OUT_OF_MEMORY; /* plainauth too small */ return CURLE_OUT_OF_MEMORY; /* plainauth too small */
@ -405,6 +403,7 @@ static CURLcode smtp_auth_plain_data(struct connectdata *conn,
memcpy(plainauth + ulen + 1, conn->user, ulen); memcpy(plainauth + ulen + 1, conn->user, ulen);
plainauth[2 * ulen + 1] = '\0'; plainauth[2 * ulen + 1] = '\0';
memcpy(plainauth + 2 * ulen + 2, conn->passwd, plen); memcpy(plainauth + 2 * ulen + 2, conn->passwd, plen);
return Curl_base64_encode(conn->data, plainauth, 2 * ulen + plen + 2, return Curl_base64_encode(conn->data, plainauth, 2 * ulen + plen + 2,
outptr, outlen); outptr, outlen);
} }
@ -447,7 +446,7 @@ static CURLcode smtp_authenticate(struct connectdata *conn)
smtpstate state2 = SMTP_STOP; smtpstate state2 = SMTP_STOP;
/* Check we have a username and password to authenticate with and end the /* Check we have a username and password to authenticate with and end the
connect phase if we don't. */ connect phase if we don't */
if(!conn->bits.user_passwd) { if(!conn->bits.user_passwd) {
state(conn, SMTP_STOP); state(conn, SMTP_STOP);
@ -455,7 +454,7 @@ static CURLcode smtp_authenticate(struct connectdata *conn)
} }
/* Check supported authentication mechanisms by decreasing order of /* Check supported authentication mechanisms by decreasing order of
security. */ security */
#ifndef CURL_DISABLE_CRYPTO_AUTH #ifndef CURL_DISABLE_CRYPTO_AUTH
if(smtpc->authmechs & SMTP_AUTH_DIGEST_MD5) { if(smtpc->authmechs & SMTP_AUTH_DIGEST_MD5) {
mech = "DIGEST-MD5"; mech = "DIGEST-MD5";
@ -495,7 +494,7 @@ static CURLcode smtp_authenticate(struct connectdata *conn)
} }
else { else {
infof(conn->data, "No known auth mechanisms supported!\n"); infof(conn->data, "No known auth mechanisms supported!\n");
result = CURLE_LOGIN_DENIED; /* Other mechanisms not supported. */ result = CURLE_LOGIN_DENIED; /* Other mechanisms not supported */
} }
if(!result) { if(!result) {
@ -724,7 +723,7 @@ static CURLcode smtp_state_authlogin_resp(struct connectdata *conn,
return result; return result;
} }
/* for responses to user entry of AUTH LOGIN. */ /* for responses to user entry of AUTH LOGIN */
static CURLcode smtp_state_authpasswd_resp(struct connectdata *conn, static CURLcode smtp_state_authpasswd_resp(struct connectdata *conn,
int smtpcode, int smtpcode,
smtpstate instate) smtpstate instate)
@ -766,7 +765,7 @@ static CURLcode smtp_state_authpasswd_resp(struct connectdata *conn,
#ifndef CURL_DISABLE_CRYPTO_AUTH #ifndef CURL_DISABLE_CRYPTO_AUTH
/* for AUTH CRAM-MD5 responses. */ /* for AUTH CRAM-MD5 responses */
static CURLcode smtp_state_authcram_resp(struct connectdata *conn, static CURLcode smtp_state_authcram_resp(struct connectdata *conn,
int smtpcode, int smtpcode,
smtpstate instate) smtpstate instate)
@ -789,7 +788,7 @@ static CURLcode smtp_state_authcram_resp(struct connectdata *conn,
return CURLE_LOGIN_DENIED; return CURLE_LOGIN_DENIED;
} }
/* Get the challenge. */ /* Get the challenge */
for(chlg64 += 4; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++) for(chlg64 += 4; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
; ;
@ -811,7 +810,7 @@ static CURLcode smtp_state_authcram_resp(struct connectdata *conn,
} }
} }
/* Compute digest. */ /* Compute digest */
ctxt = Curl_HMAC_init(Curl_HMAC_MD5, ctxt = Curl_HMAC_init(Curl_HMAC_MD5,
(const unsigned char *) conn->passwd, (const unsigned char *) conn->passwd,
curlx_uztoui(strlen(conn->passwd))); curlx_uztoui(strlen(conn->passwd)));
@ -828,15 +827,15 @@ static CURLcode smtp_state_authcram_resp(struct connectdata *conn,
Curl_HMAC_final(ctxt, digest); Curl_HMAC_final(ctxt, digest);
/* Prepare the reply. */ /* Prepare the reply */
snprintf(reply, sizeof reply, snprintf(reply, sizeof(reply),
"%s %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", "%s %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
conn->user, digest[0], digest[1], digest[2], digest[3], digest[4], conn->user, digest[0], digest[1], digest[2], digest[3], digest[4],
digest[5], digest[5],
digest[6], digest[7], digest[8], digest[9], digest[10], digest[11], digest[6], digest[7], digest[8], digest[9], digest[10], digest[11],
digest[12], digest[13], digest[14], digest[15]); digest[12], digest[13], digest[14], digest[15]);
/* Encode it to base64 and send it. */ /* Encode it to base64 and send it */
result = Curl_base64_encode(data, reply, 0, &rplyb64, &len); result = Curl_base64_encode(data, reply, 0, &rplyb64, &len);
if(!result) { if(!result) {
@ -904,21 +903,20 @@ static CURLcode smtp_state_authdigest_resp(struct connectdata *conn,
/* Retrieve nonce string from the challenge */ /* Retrieve nonce string from the challenge */
if(!smtp_digest_get_key_value(chlg, "nonce=\"", nonce, if(!smtp_digest_get_key_value(chlg, "nonce=\"", nonce,
sizeof(nonce), '\"')) { sizeof(nonce), '\"')) {
Curl_safefree(chlg); Curl_safefree(chlg);
return CURLE_LOGIN_DENIED; return CURLE_LOGIN_DENIED;
} }
/* Retrieve realm string from the challenge */ /* Retrieve realm string from the challenge */
if(!smtp_digest_get_key_value(chlg, "realm=\"", realm, if(!smtp_digest_get_key_value(chlg, "realm=\"", realm,
sizeof(realm), '\"')) { sizeof(realm), '\"')) {
/* Challenge does not have a realm, set empty string [RFC2831] page 6 */ /* Challenge does not have a realm, set empty string [RFC2831] page 6 */
strcpy(realm, ""); strcpy(realm, "");
} }
/* Retrieve algorithm string from the challenge */ /* Retrieve algorithm string from the challenge */
if(!smtp_digest_get_key_value(chlg, "algorithm=", alg, if(!smtp_digest_get_key_value(chlg, "algorithm=", alg, sizeof(alg), ',')) {
sizeof(alg), ',')) {
Curl_safefree(chlg); Curl_safefree(chlg);
return CURLE_LOGIN_DENIED; return CURLE_LOGIN_DENIED;
} }
@ -1015,6 +1013,7 @@ static CURLcode smtp_state_authdigest_resp(struct connectdata *conn,
if(!result) if(!result)
state(conn, SMTP_AUTHDIGESTMD5_RESP); state(conn, SMTP_AUTHDIGESTMD5_RESP);
} }
Curl_safefree(rplyb64); Curl_safefree(rplyb64);
} }
@ -1048,7 +1047,7 @@ static CURLcode smtp_state_authdigest_resp_resp(struct connectdata *conn,
#endif #endif
#ifdef USE_NTLM #ifdef USE_NTLM
/* for the AUTH NTLM (without initial response) response. */ /* for the AUTH NTLM (without initial response) response */
static CURLcode smtp_state_auth_ntlm_resp(struct connectdata *conn, static CURLcode smtp_state_auth_ntlm_resp(struct connectdata *conn,
int smtpcode, int smtpcode,
smtpstate instate) smtpstate instate)
@ -1074,6 +1073,7 @@ static CURLcode smtp_state_auth_ntlm_resp(struct connectdata *conn,
if(!result) if(!result)
state(conn, SMTP_AUTHNTLM_TYPE2MSG); state(conn, SMTP_AUTHNTLM_TYPE2MSG);
} }
Curl_safefree(type1msg); Curl_safefree(type1msg);
} }
} }
@ -1081,7 +1081,7 @@ static CURLcode smtp_state_auth_ntlm_resp(struct connectdata *conn,
return result; return result;
} }
/* for the NTLM type-2 response (sent in reponse to our type-1 message). */ /* for the NTLM type-2 response (sent in reponse to our type-1 message) */
static CURLcode smtp_state_auth_ntlm_type2msg_resp(struct connectdata *conn, static CURLcode smtp_state_auth_ntlm_type2msg_resp(struct connectdata *conn,
int smtpcode, int smtpcode,
smtpstate instate) smtpstate instate)
@ -1111,6 +1111,7 @@ static CURLcode smtp_state_auth_ntlm_type2msg_resp(struct connectdata *conn,
if(!result) if(!result)
state(conn, SMTP_AUTH); state(conn, SMTP_AUTH);
} }
Curl_safefree(type3msg); Curl_safefree(type3msg);
} }
} }
@ -1120,7 +1121,7 @@ static CURLcode smtp_state_auth_ntlm_type2msg_resp(struct connectdata *conn,
} }
#endif #endif
/* for final responses to AUTH sequences. */ /* for the final responses to the AUTH sequence */
static CURLcode smtp_state_auth_resp(struct connectdata *conn, static CURLcode smtp_state_auth_resp(struct connectdata *conn,
int smtpcode, int smtpcode,
smtpstate instate) smtpstate instate)
@ -1135,7 +1136,7 @@ static CURLcode smtp_state_auth_resp(struct connectdata *conn,
result = CURLE_LOGIN_DENIED; result = CURLE_LOGIN_DENIED;
} }
else else
state(conn, SMTP_STOP); /* End of connect phase. */ state(conn, SMTP_STOP); /* End of connect phase */
return result; return result;
} }
@ -1241,6 +1242,7 @@ static CURLcode smtp_state_mail_resp(struct connectdata *conn,
{ {
CURLcode result = CURLE_OK; CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data; struct SessionHandle *data = conn->data;
(void)instate; /* no use for this yet */ (void)instate; /* no use for this yet */
if(smtpcode/100 != 2) { if(smtpcode/100 != 2) {
@ -1265,6 +1267,7 @@ static CURLcode smtp_state_rcpt_resp(struct connectdata *conn,
{ {
CURLcode result = CURLE_OK; CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data; struct SessionHandle *data = conn->data;
(void)instate; /* no use for this yet */ (void)instate; /* no use for this yet */
if(smtpcode/100 != 2) { if(smtpcode/100 != 2) {
@ -1453,8 +1456,7 @@ static CURLcode smtp_statemach_act(struct connectdata *conn)
} }
/* called repeatedly until done from multi.c */ /* called repeatedly until done from multi.c */
static CURLcode smtp_multi_statemach(struct connectdata *conn, static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done)
bool *done)
{ {
struct smtp_conn *smtpc = &conn->proto.smtpc; struct smtp_conn *smtpc = &conn->proto.smtpc;
CURLcode result; CURLcode result;
@ -1519,8 +1521,7 @@ static CURLcode smtp_init(struct connectdata *conn)
* connect phase is done when this function returns, or FALSE if not. When * connect phase is done when this function returns, or FALSE if not. When
* called as a part of the easy interface, it will always be TRUE. * called as a part of the easy interface, it will always be TRUE.
*/ */
static CURLcode smtp_connect(struct connectdata *conn, static CURLcode smtp_connect(struct connectdata *conn, bool *done)
bool *done) /* see description above */
{ {
CURLcode result; CURLcode result;
struct smtp_conn *smtpc = &conn->proto.smtpc; struct smtp_conn *smtpc = &conn->proto.smtpc;
@ -1556,7 +1557,8 @@ static CURLcode smtp_connect(struct connectdata *conn,
return result; return result;
} }
Curl_pp_init(pp); /* init the response reader stuff */ /* Initialise the response reader stuff */
Curl_pp_init(pp);
pp->response_time = RESP_TIMEOUT; /* set default response time-out */ pp->response_time = RESP_TIMEOUT; /* set default response time-out */
pp->statemach_act = smtp_statemach_act; pp->statemach_act = smtp_statemach_act;
@ -1800,8 +1802,7 @@ static CURLcode smtp_disconnect(struct connectdata *conn,
} }
/* call this when the DO phase has completed */ /* call this when the DO phase has completed */
static CURLcode smtp_dophase_done(struct connectdata *conn, static CURLcode smtp_dophase_done(struct connectdata *conn, bool connected)
bool connected)
{ {
struct FTP *smtp = conn->data->state.proto.smtp; struct FTP *smtp = conn->data->state.proto.smtp;
struct smtp_conn *smtpc = &conn->proto.smtpc; struct smtp_conn *smtpc = &conn->proto.smtpc;
@ -1817,8 +1818,7 @@ static CURLcode smtp_dophase_done(struct connectdata *conn,
} }
/* called from multi.c while DOing */ /* called from multi.c while DOing */
static CURLcode smtp_doing(struct connectdata *conn, static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done)
bool *dophase_done)
{ {
CURLcode result; CURLcode result;
result = smtp_multi_statemach(conn, dophase_done); result = smtp_multi_statemach(conn, dophase_done);
@ -1938,7 +1938,7 @@ CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread)
memcpy(&data->state.scratch[si], SMTP_EOB, smtpc->eob); memcpy(&data->state.scratch[si], SMTP_EOB, smtpc->eob);
si += smtpc->eob; si += smtpc->eob;
/* then compare the first byte */ /* Then compare the first byte */
if(SMTP_EOB[0] == data->req.upload_fromhere[i]) if(SMTP_EOB[0] == data->req.upload_fromhere[i])
smtpc->eob = 1; smtpc->eob = 1;
else else
@ -1954,7 +1954,9 @@ CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread)
memcpy(&data->state.scratch[si], SMTP_EOB_REPL, memcpy(&data->state.scratch[si], SMTP_EOB_REPL,
SMTP_EOB_REPL_LEN); SMTP_EOB_REPL_LEN);
si += SMTP_EOB_REPL_LEN; si += SMTP_EOB_REPL_LEN;
smtpc->eob = 2; /* start over at two bytes */
/* Start over at two bytes */
smtpc->eob = 2;
} }
else if(!smtpc->eob) else if(!smtpc->eob)
data->state.scratch[si++] = data->req.upload_fromhere[i]; data->state.scratch[si++] = data->req.upload_fromhere[i];
@ -1968,13 +1970,13 @@ CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread)
} }
if(si != nread) { if(si != nread) {
/* only use the new buffer if we replaced something */ /* Only use the new buffer if we replaced something */
nread = si; nread = si;
/* upload from the new (replaced) buffer instead */ /* Upload from the new (replaced) buffer instead */
data->req.upload_fromhere = data->state.scratch; data->req.upload_fromhere = data->state.scratch;
/* set the new amount too */ /* Set the new amount too */
data->req.upload_present = nread; data->req.upload_present = nread;
} }