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postfix-3.5-20200112

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This commit is contained in:
Wietse Venema 2020-01-12 00:00:00 -05:00 committed by Viktor Dukhovni
parent 960a802133
commit e1b52f45e3
15 changed files with 882 additions and 315 deletions
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83
postfix/.indent.pro vendored
View File

@ -20,7 +20,6 @@
-TBH_TABLE -TBH_TABLE
-TBINATTR -TBINATTR
-TBINATTR_INFO -TBINATTR_INFO
-Tbind_props
-TBINHASH -TBINHASH
-TBINHASH_INFO -TBINHASH_INFO
-TBIO -TBIO
@ -38,10 +37,9 @@
-TBYTE_MASK -TBYTE_MASK
-TCFG_PARSER -TCFG_PARSER
-TCIDR_MATCH -TCIDR_MATCH
-Tcipher_probe_t
-TCLEANUP_REGION -TCLEANUP_REGION
-TCLEANUP_STAT_DETAIL
-TCLEANUP_STATE -TCLEANUP_STATE
-TCLEANUP_STAT_DETAIL
-TCLIENT_LIST -TCLIENT_LIST
-TCLNT_STREAM -TCLNT_STREAM
-TCONFIG_BOOL_FN_TABLE -TCONFIG_BOOL_FN_TABLE
@ -65,11 +63,9 @@
-TCRYPTO_EX_DATA -TCRYPTO_EX_DATA
-TCTABLE -TCTABLE
-TCTABLE_ENTRY -TCTABLE_ENTRY
-Td2i_X509_t
-Tdane_digest
-TDB_COMMON_CTX -TDB_COMMON_CTX
-TDELIVER_ATTR
-TDELIVERED_HDR_INFO -TDELIVERED_HDR_INFO
-TDELIVER_ATTR
-TDELIVER_REQUEST -TDELIVER_REQUEST
-TDELTA_TIME -TDELTA_TIME
-TDICT -TDICT
@ -150,9 +146,7 @@
-TEVP_PKEY -TEVP_PKEY
-TEXPAND_ATTR -TEXPAND_ATTR
-TFILE -TFILE
-Tfilter_ctx
-TFORWARD_INFO -TFORWARD_INFO
-Tgeneral_name_stack_t
-THBC_ACTION_CALL_BACKS -THBC_ACTION_CALL_BACKS
-THBC_CALL_BACKS -THBC_CALL_BACKS
-THBC_CHECKS -THBC_CHECKS
@ -164,18 +158,17 @@
-THOST -THOST
-THTABLE -THTABLE
-THTABLE_INFO -THTABLE_INFO
-Tiana_digest
-TINET_ADDR_LIST -TINET_ADDR_LIST
-TINET_PROTO_INFO -TINET_PROTO_INFO
-TINSTANCE -TINSTANCE
-TINST_SELECTION -TINST_SELECTION
-TINT32_TYPE -TINT32_TYPE
-TINT_TABLE
-TINTV -TINTV
-TINT_TABLE
-TJMP_BUF_WRAPPER -TJMP_BUF_WRAPPER
-TLDAP -TLDAP
-TLDAP_CONN
-TLDAPMessage -TLDAPMessage
-TLDAP_CONN
-TLIB_DP -TLIB_DP
-TLIB_FN -TLIB_FN
-TLMTP_ATTR -TLMTP_ATTR
@ -190,14 +183,14 @@
-TMAC_EXP_OP_INFO -TMAC_EXP_OP_INFO
-TMAC_HEAD -TMAC_HEAD
-TMAC_PARSE -TMAC_PARSE
-TMAI_HOSTADDR_STR
-TMAI_HOSTNAME_STR
-TMAIL_ADDR_FORMATTER -TMAIL_ADDR_FORMATTER
-TMAIL_ADDR_MAP_TEST -TMAIL_ADDR_MAP_TEST
-TMAIL_PRINT -TMAIL_PRINT
-TMAIL_SCAN -TMAIL_SCAN
-TMAIL_STREAM -TMAIL_STREAM
-TMAIL_VERSION -TMAIL_VERSION
-TMAI_HOSTADDR_STR
-TMAI_HOSTNAME_STR
-TMAI_SERVNAME_STR -TMAI_SERVNAME_STR
-TMAI_SERVPORT_STR -TMAI_SERVPORT_STR
-TMAPS -TMAPS
@ -216,9 +209,9 @@
-TMDB_val -TMDB_val
-TMILTER -TMILTER
-TMILTER8 -TMILTER8
-TMILTERS
-TMILTER_MACROS -TMILTER_MACROS
-TMILTER_MSG_CONTEXT -TMILTER_MSG_CONTEXT
-TMILTERS
-TMIME_ENCODING -TMIME_ENCODING
-TMIME_INFO -TMIME_INFO
-TMIME_STACK -TMIME_STACK
@ -243,7 +236,6 @@
-TNAME_CODE -TNAME_CODE
-TNAME_MASK -TNAME_MASK
-TNBBIO -TNBBIO
-Toff_t
-TOPTIONS -TOPTIONS
-TPCF_DBMS_INFO -TPCF_DBMS_INFO
-TPCF_EVAL_CTX -TPCF_EVAL_CTX
@ -257,7 +249,6 @@
-TPCF_SERVICE_PATTERN -TPCF_SERVICE_PATTERN
-TPCF_STRING_NV -TPCF_STRING_NV
-TPEER_NAME -TPEER_NAME
-Tpem_load_state_t
-TPGSQL_NAME -TPGSQL_NAME
-TPICKUP_INFO -TPICKUP_INFO
-TPIPE_ATTR -TPIPE_ATTR
@ -265,9 +256,9 @@
-TPIPE_STATE -TPIPE_STATE
-TPLMYSQL -TPLMYSQL
-TPLPGSQL -TPLPGSQL
-TPOSTMAP_KEY_STATE
-TPOST_MAIL_FCLOSE_STATE -TPOST_MAIL_FCLOSE_STATE
-TPOST_MAIL_STATE -TPOST_MAIL_STATE
-TPOSTMAP_KEY_STATE
-TPRIVATE_STR_TABLE -TPRIVATE_STR_TABLE
-TPSC_CALL_BACK_ENTRY -TPSC_CALL_BACK_ENTRY
-TPSC_CLIENT_INFO -TPSC_CLIENT_INFO
@ -295,15 +286,11 @@
-TRECIPIENT -TRECIPIENT
-TRECIPIENT_LIST -TRECIPIENT_LIST
-TREC_TYPE_NAME -TREC_TYPE_NAME
-Tregex_t
-Tregmatch_t
-TRES_CONTEXT
-TRESOLVE_REPLY -TRESOLVE_REPLY
-TRESPONSE -TRESPONSE
-TREST_TABLE -TREST_TABLE
-TRES_CONTEXT
-TRWR_CONTEXT -TRWR_CONTEXT
-Tsasl_conn_t
-Tsasl_secret_t
-TSCACHE -TSCACHE
-TSCACHE_CLNT -TSCACHE_CLNT
-TSCACHE_MULTI -TSCACHE_MULTI
@ -318,19 +305,12 @@
-TSCAN_INFO -TSCAN_INFO
-TSCAN_OBJ -TSCAN_OBJ
-TSESSION -TSESSION
-Tsfsistat
-TSHARED_PATH -TSHARED_PATH
-Tsigset_t
-TSINGLE_SERVER -TSINGLE_SERVER
-TSINK_COMMAND -TSINK_COMMAND
-TSINK_STATE -TSINK_STATE
-Tsize_t
-TSLMDB -TSLMDB
-TSMFICTX -TSMFICTX
-TSM_STATE
-TSMTP_ADDR
-TSMTP_CLI_ATTR
-TSMTP_CMD
-TSMTPD_CMD -TSMTPD_CMD
-TSMTPD_DEFER -TSMTPD_DEFER
-TSMTPD_ENDPT_LOOKUP_INFO -TSMTPD_ENDPT_LOOKUP_INFO
@ -342,6 +322,9 @@
-TSMTPD_STATE -TSMTPD_STATE
-TSMTPD_TOKEN -TSMTPD_TOKEN
-TSMTPD_XFORWARD_ATTR -TSMTPD_XFORWARD_ATTR
-TSMTP_ADDR
-TSMTP_CLI_ATTR
-TSMTP_CMD
-TSMTP_ITERATOR -TSMTP_ITERATOR
-TSMTP_RESP -TSMTP_RESP
-TSMTP_SASL_AUTH_CACHE -TSMTP_SASL_AUTH_CACHE
@ -350,13 +333,10 @@
-TSMTP_TLS_POLICY -TSMTP_TLS_POLICY
-TSMTP_TLS_SESS -TSMTP_TLS_SESS
-TSMTP_TLS_SITE_POLICY -TSMTP_TLS_SITE_POLICY
-Tsockaddr -TSM_STATE
-TSOCKADDR_SIZE -TSOCKADDR_SIZE
-TSPAWN_ATTR -TSPAWN_ATTR
-Tssize_t
-TSSL -TSSL
-Tssl_cipher_stack_t
-Tssl_comp_stack_t
-TSSL_CTX -TSSL_CTX
-TSSL_SESSION -TSSL_SESSION
-TSTATE -TSTATE
@ -364,20 +344,17 @@
-TSTRING_TABLE -TSTRING_TABLE
-TSYS_EXITS_DETAIL -TSYS_EXITS_DETAIL
-TTEST_CASE -TTEST_CASE
-Ttime_t -TTLSMGR_SCACHE
-Ttlsa_filter -TTLSP_STATE
-TTLS_APPL_STATE -TTLS_APPL_STATE
-TTLS_CERTS -TTLS_CERTS
-TTLS_CLIENT_INIT_PROPS -TTLS_CLIENT_INIT_PROPS
-TTLS_CLIENT_PARAMS -TTLS_CLIENT_PARAMS
-TTLS_CLIENT_START_PROPS -TTLS_CLIENT_START_PROPS
-TTLScontext_t
-TTLS_DANE -TTLS_DANE
-TTLSMGR_SCACHE
-TTLS_PKEYS -TTLS_PKEYS
-TTLS_PRNG_SEED_INFO -TTLS_PRNG_SEED_INFO
-TTLS_PRNG_SRC -TTLS_PRNG_SRC
-TTLSP_STATE
-TTLS_ROLE -TTLS_ROLE
-TTLS_SCACHE -TTLS_SCACHE
-TTLS_SCACHE_ENTRY -TTLS_SCACHE_ENTRY
@ -388,6 +365,7 @@
-TTLS_TLSA -TTLS_TLSA
-TTLS_USAGE -TTLS_USAGE
-TTLS_VINFO -TTLS_VINFO
-TTLScontext_t
-TTOK822 -TTOK822
-TTRANSPORT_INFO -TTRANSPORT_INFO
-TTRIGGER_SERVER -TTRIGGER_SERVER
@ -400,11 +378,10 @@
-TWATCHDOG -TWATCHDOG
-TWATCH_FD -TWATCH_FD
-TX509 -TX509
-TX509V3_CTX
-TX509_EXTENSION -TX509_EXTENSION
-TX509_NAME -TX509_NAME
-Tx509_stack_t
-TX509_STORE_CTX -TX509_STORE_CTX
-TX509V3_CTX
-TXSASL_CLIENT -TXSASL_CLIENT
-TXSASL_CLIENT_CREATE_ARGS -TXSASL_CLIENT_CREATE_ARGS
-TXSASL_CLIENT_IMPL -TXSASL_CLIENT_IMPL
@ -421,3 +398,29 @@
-TXSASL_SERVER_CREATE_ARGS -TXSASL_SERVER_CREATE_ARGS
-TXSASL_SERVER_IMPL -TXSASL_SERVER_IMPL
-TXSASL_SERVER_IMPL_INFO -TXSASL_SERVER_IMPL_INFO
-Tbind_props
-Tcipher_probe_t
-Td2i_X509_t
-Tdane_digest
-Tfilter_ctx
-Tgeneral_name_stack_t
-Tiana_digest
-Toff_t
-Tpem_load_state_t
-Tregex_t
-Tregmatch_t
-Tsasl_conn_t
-Tsasl_secret_t
-Tsfsistat
-Tsigset_t
-Tsize_t
-Tsockaddr
-Tssize_t
-Tssl_cipher_stack_t
-Tssl_comp_stack_t
-Ttime_t
-Ttlsa_filter
-Tuint16_t
-Tuint32_t
-Tuint8_t
-Tx509_stack_t

30
postfix/HISTORY
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@ -24534,3 +24534,33 @@ Apologies for any names omitted.
= smtp:foo.exmple, bar.example". Files: smtp/smtp.c, = smtp:foo.exmple, bar.example". Files: smtp/smtp.c,
smtp/smtp_connect.c, trivial-rewrite/resolve.c, proto/transport, smtp/smtp_connect.c, trivial-rewrite/resolve.c, proto/transport,
proto/postconf.proto, global/mail_params.c. proto/postconf.proto, global/mail_params.c.
20200112
[intially released as part of postfix-20200101-nonprod]
Refactored the haproxy infrastructure in preparation for
haproxy version 2 support. This is necessary because version
2 introduces a dependency of the reader on the parser.
Additionally, version 2 introduces support for non-proxied
connections (used by health checks). Files: global/haproxy_srvr.c,
smtpd/smtpd_peer.c, smtpd/smtpd_haproxy.c, smtpd/smtpd.h,
postscreen/postscreen.h, postscreen/postscreen_endpt.c,
postscreen/postscreen_haproxy.c, postscreen/postscreen_haproxy.h,
global/haproxy_srvr.h. Initial release 3.5-20200101-nonprod.
[intially released as part of postfix-20200105-nonprod]
Support for the haproxy v2 protocol. The haproxy v2 protocol
support is limited to TCP over IPv4 and TCP over IPv6. It
also supports non-proxied connections (typically used for
heartbeat tests). File: global/haproxy_srvr.c.
[intially released as part of postfix-20200105-nonprod]
Cleanup: after haproxy handshake error, the Postfix SMTP
daemon now logs the proxy connection information instead
of unknown/unknown, and replies with "421 4.3.0 $myhostname
Server local error" instead of just hanging up. Error
details are logged to the maillog file. File: smtpd/smtpd.c.
Cleanup: miscellaneous comments, constants, error checks,
no normal behavior change. Files: global/haproxy_srvr.c,
postscreen/postscreen_haproxy.c.

4
postfix/src/global/Makefile.in
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@ -1401,6 +1401,7 @@ haproxy_srvr.o: ../../include/inet_proto.h
haproxy_srvr.o: ../../include/msg.h haproxy_srvr.o: ../../include/msg.h
haproxy_srvr.o: ../../include/myaddrinfo.h haproxy_srvr.o: ../../include/myaddrinfo.h
haproxy_srvr.o: ../../include/mymalloc.h haproxy_srvr.o: ../../include/mymalloc.h
haproxy_srvr.o: ../../include/split_at.h
haproxy_srvr.o: ../../include/stringops.h haproxy_srvr.o: ../../include/stringops.h
haproxy_srvr.o: ../../include/sys_defs.h haproxy_srvr.o: ../../include/sys_defs.h
haproxy_srvr.o: ../../include/valid_hostname.h haproxy_srvr.o: ../../include/valid_hostname.h
@ -1448,12 +1449,15 @@ header_token.o: header_token.c
header_token.o: header_token.h header_token.o: header_token.h
header_token.o: lex_822.h header_token.o: lex_822.h
info_log_addr_form.o: ../../include/check_arg.h info_log_addr_form.o: ../../include/check_arg.h
info_log_addr_form.o: ../../include/msg.h
info_log_addr_form.o: ../../include/name_code.h
info_log_addr_form.o: ../../include/sys_defs.h info_log_addr_form.o: ../../include/sys_defs.h
info_log_addr_form.o: ../../include/vbuf.h info_log_addr_form.o: ../../include/vbuf.h
info_log_addr_form.o: ../../include/vstring.h info_log_addr_form.o: ../../include/vstring.h
info_log_addr_form.o: info_log_addr_form.c info_log_addr_form.o: info_log_addr_form.c
info_log_addr_form.o: info_log_addr_form.h info_log_addr_form.o: info_log_addr_form.h
info_log_addr_form.o: mail_addr_form.h info_log_addr_form.o: mail_addr_form.h
info_log_addr_form.o: mail_params.h
info_log_addr_form.o: quote_822_local.h info_log_addr_form.o: quote_822_local.h
info_log_addr_form.o: quote_flags.h info_log_addr_form.o: quote_flags.h
input_transp.o: ../../include/check_arg.h input_transp.o: ../../include/check_arg.h

812
postfix/src/global/haproxy_srvr.c
View File

@ -6,21 +6,45 @@
/* SYNOPSIS /* SYNOPSIS
/* #include <haproxy_srvr.h> /* #include <haproxy_srvr.h>
/* /*
/* const char *haproxy_srvr_parse(str, /* const char *haproxy_srvr_parse(str, str_len, non_proxy,
/* smtp_client_addr, smtp_client_port, /* smtp_client_addr, smtp_client_port,
/* smtp_server_addr, smtp_server_port) /* smtp_server_addr, smtp_server_port)
/* const char *str; /* const char *str;
/* ssize_t *str_len;
/* int *non_proxy;
/* MAI_HOSTADDR_STR *smtp_client_addr,
/* MAI_SERVPORT_STR *smtp_client_port,
/* MAI_HOSTADDR_STR *smtp_server_addr,
/* MAI_SERVPORT_STR *smtp_server_port;
/*
/* const char *haproxy_srvr_receive(fd, non_proxy,
/* smtp_client_addr, smtp_client_port,
/* smtp_server_addr, smtp_server_port)
/* int fd;
/* int *non_proxy;
/* MAI_HOSTADDR_STR *smtp_client_addr, /* MAI_HOSTADDR_STR *smtp_client_addr,
/* MAI_SERVPORT_STR *smtp_client_port, /* MAI_SERVPORT_STR *smtp_client_port,
/* MAI_HOSTADDR_STR *smtp_server_addr, /* MAI_HOSTADDR_STR *smtp_server_addr,
/* MAI_SERVPORT_STR *smtp_server_port; /* MAI_SERVPORT_STR *smtp_server_port;
/* DESCRIPTION /* DESCRIPTION
/* haproxy_srvr_parse() parses a haproxy line. The result is /* haproxy_srvr_parse() parses a haproxy v1 or v2 protocol
/* null in case of success, a pointer to text (with the error /* message. The result is null in case of success, a pointer
/* type) in case of error. If both IPv6 and IPv4 support are /* to text (with the error type) in case of error. If both
/* enabled, IPV4_IN_IPV6 address syntax (::ffff:1.2.3.4) is /* IPv6 and IPv4 support are enabled, IPV4_IN_IPV6 address
/* converted to IPV4 syntax, provided that IPv4 support is /* form (::ffff:1.2.3.4) is converted to IPV4 form. In case
/* enabled. /* of success, the str_len argument is updated with the number
/* of bytes parsed, and the non_proxy argument is true or false
/* if the haproxy message specifies a non-proxied connection.
/*
/* haproxy_srvr_receive() receives and parses a haproxy protocol
/* handshake. This must be called before any I/O is done on
/* the specified file descriptor. The result is 0 in case of
/* success, -1 in case of error. All errors are logged.
/*
/* The haproxy v2 protocol support is limited to TCP over IPv4,
/* TCP over IPv6, and non-proxied connections. In the latter
/* case, the caller is responsible for any local or remote
/* address/port lookup.
/* LICENSE /* LICENSE
/* .ad /* .ad
/* .fi /* .fi
@ -56,6 +80,8 @@
#include <stringops.h> #include <stringops.h>
#include <mymalloc.h> #include <mymalloc.h>
#include <inet_proto.h> #include <inet_proto.h>
#include <split_at.h>
#include <sock_addr.h>
/* Global library. */ /* Global library. */
@ -63,8 +89,86 @@
/* Application-specific. */ /* Application-specific. */
/*
* The haproxy protocol assumes that a haproxy header will normally not
* exceed the default IPv4 TCP MSS, i.e. 576-40=536 bytes (the IPv6 default
* is larger: 1280-60=1220). With a proxy header that contains IPv6
* addresses, that leaves room for 536-52=484 bytes of TLVs. The Postfix
* implementation does not support headers with UNIX-domain addresses.
*/
#define HAPROXY_HEADER_MAX_LEN 536
/*
* Begin protocol v2 definitions from haproxy/include/types/connection.h.
*/
#define PP2_SIGNATURE "\r\n\r\n\0\r\nQUIT\n"
#define PP2_SIGNATURE_LEN 12
#define PP2_HEADER_LEN 16
/* ver_cmd byte */
#define PP2_CMD_LOCAL 0x00
#define PP2_CMD_PROXY 0x01
#define PP2_CMD_MASK 0x0F
#define PP2_VERSION 0x20
#define PP2_VERSION_MASK 0xF0
/* fam byte */
#define PP2_TRANS_UNSPEC 0x00
#define PP2_TRANS_STREAM 0x01
#define PP2_TRANS_DGRAM 0x02
#define PP2_TRANS_MASK 0x0F
#define PP2_FAM_UNSPEC 0x00
#define PP2_FAM_INET 0x10
#define PP2_FAM_INET6 0x20
#define PP2_FAM_UNIX 0x30
#define PP2_FAM_MASK 0xF0
/* len field (2 bytes) */
#define PP2_ADDR_LEN_UNSPEC (0)
#define PP2_ADDR_LEN_INET (4 + 4 + 2 + 2)
#define PP2_ADDR_LEN_INET6 (16 + 16 + 2 + 2)
#define PP2_ADDR_LEN_UNIX (108 + 108)
#define PP2_HDR_LEN_UNSPEC (PP2_HEADER_LEN + PP2_ADDR_LEN_UNSPEC)
#define PP2_HDR_LEN_INET (PP2_HEADER_LEN + PP2_ADDR_LEN_INET)
#define PP2_HDR_LEN_INET6 (PP2_HEADER_LEN + PP2_ADDR_LEN_INET6)
#define PP2_HDR_LEN_UNIX (PP2_HEADER_LEN + PP2_ADDR_LEN_UNIX)
struct proxy_hdr_v2 {
uint8_t sig[PP2_SIGNATURE_LEN]; /* PP2_SIGNATURE */
uint8_t ver_cmd; /* protocol version | command */
uint8_t fam; /* protocol family and transport */
uint16_t len; /* length of remainder */
union {
struct { /* for TCP/UDP over IPv4, len = 12 */
uint32_t src_addr;
uint32_t dst_addr;
uint16_t src_port;
uint16_t dst_port;
} ip4;
struct { /* for TCP/UDP over IPv6, len = 36 */
uint8_t src_addr[16];
uint8_t dst_addr[16];
uint16_t src_port;
uint16_t dst_port;
} ip6;
struct { /* for AF_UNIX sockets, len = 216 */
uint8_t src_addr[108];
uint8_t dst_addr[108];
} unx;
} addr;
};
/*
* End protocol v2 definitions from haproxy/include/types/connection.h.
*/
static INET_PROTO_INFO *proto_info; static INET_PROTO_INFO *proto_info;
#define STR_OR_NULL(str) ((str) ? (str) : "(null)")
/* haproxy_srvr_parse_lit - extract and validate string literal */ /* haproxy_srvr_parse_lit - extract and validate string literal */
static int haproxy_srvr_parse_lit(const char *str,...) static int haproxy_srvr_parse_lit(const char *str,...)
@ -72,15 +176,19 @@ static int haproxy_srvr_parse_lit(const char *str,...)
va_list ap; va_list ap;
const char *cp; const char *cp;
int result = -1; int result = -1;
int count;
if (msg_verbose) if (msg_verbose)
msg_info("haproxy_srvr_parse: %s", str); msg_info("haproxy_srvr_parse: %s", STR_OR_NULL(str));
if (str != 0) { if (str != 0) {
va_start(ap, str); va_start(ap, str);
while (result < 0 && (cp = va_arg(ap, const char *)) != 0) for (count = 0; (cp = va_arg(ap, const char *)) != 0; count++) {
if (strcmp(str, cp) == 0) if (strcmp(str, cp) == 0) {
result = 0; result = count;
break;
}
}
va_end(ap); va_end(ap);
} }
return (result); return (result);
@ -91,7 +199,7 @@ static int haproxy_srvr_parse_lit(const char *str,...)
static int haproxy_srvr_parse_proto(const char *str, int *addr_family) static int haproxy_srvr_parse_proto(const char *str, int *addr_family)
{ {
if (msg_verbose) if (msg_verbose)
msg_info("haproxy_srvr_parse: proto=%s", str); msg_info("haproxy_srvr_parse: proto=%s", STR_OR_NULL(str));
#ifdef AF_INET6 #ifdef AF_INET6
if (strcasecmp(str, "TCP6") == 0) { if (strcasecmp(str, "TCP6") == 0) {
@ -119,7 +227,8 @@ static int haproxy_srvr_parse_addr(const char *str, MAI_HOSTADDR_STR *addr,
int err; int err;
if (msg_verbose) if (msg_verbose)
msg_info("haproxy_srvr_parse: addr=%s proto=%d", str, addr_family); msg_info("haproxy_srvr_parse: addr=%s proto=%d",
STR_OR_NULL(str), addr_family);
if (str == 0 || strlen(str) >= sizeof(MAI_HOSTADDR_STR)) if (str == 0 || strlen(str) >= sizeof(MAI_HOSTADDR_STR))
return (-1); return (-1);
@ -156,7 +265,7 @@ static int haproxy_srvr_parse_addr(const char *str, MAI_HOSTADDR_STR *addr,
static int haproxy_srvr_parse_port(const char *str, MAI_SERVPORT_STR *port) static int haproxy_srvr_parse_port(const char *str, MAI_SERVPORT_STR *port)
{ {
if (msg_verbose) if (msg_verbose)
msg_info("haproxy_srvr_parse: port=%s", str); msg_info("haproxy_srvr_parse: port=%s", STR_OR_NULL(str));
if (str == 0 || strlen(str) >= sizeof(MAI_SERVPORT_STR) if (str == 0 || strlen(str) >= sizeof(MAI_SERVPORT_STR)
|| !valid_hostport(str, DONT_GRIPE)) { || !valid_hostport(str, DONT_GRIPE)) {
return (-1); return (-1);
@ -166,18 +275,161 @@ static int haproxy_srvr_parse_port(const char *str, MAI_SERVPORT_STR *port)
} }
} }
/* haproxy_srvr_parse_v2_addr_v4 - parse IPv4 info from v2 header */
static int haproxy_srvr_parse_v2_addr_v4(uint32_t sin_addr,
unsigned sin_port,
MAI_HOSTADDR_STR *addr,
MAI_SERVPORT_STR *port)
{
struct sockaddr_in sin;
memset((void *) &sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = sin_addr;
sin.sin_port = sin_port;
if (sockaddr_to_hostaddr((struct sockaddr *) &sin, sizeof(sin),
addr, port, 0) < 0)
return (-1);
return (0);
}
#ifdef AF_INET6
/* haproxy_srvr_parse_v2_addr_v6 - parse IPv6 info from v2 header */
static int haproxy_srvr_parse_v2_addr_v6(uint8_t *sin6_addr,
unsigned sin6_port,
MAI_HOSTADDR_STR *addr,
MAI_SERVPORT_STR *port)
{
struct sockaddr_in6 sin6;
memset((void *) &sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
memcpy(&sin6.sin6_addr, sin6_addr, 16);
sin6.sin6_port = sin6_port;
if (sockaddr_to_hostaddr((struct sockaddr *) &sin6,
sizeof(sin6), addr, port, 0) < 0)
return (-1);
if (addr->buf[0] == ':'
&& strncasecmp("::ffff:", addr->buf, 7) == 0
&& strchr((char *) proto_info->sa_family_list, AF_INET) != 0)
memmove(addr->buf, addr->buf + 7,
strlen(addr->buf) + 1 - 7);
return (0);
}
#endif
/* haproxy_srvr_parse_v2_hdr - parse v2 header address info */
static const char *haproxy_srvr_parse_v2_hdr(const char *str, ssize_t *str_len,
int *non_proxy,
MAI_HOSTADDR_STR *smtp_client_addr,
MAI_SERVPORT_STR *smtp_client_port,
MAI_HOSTADDR_STR *smtp_server_addr,
MAI_SERVPORT_STR *smtp_server_port)
{
const char myname[] = "haproxy_srvr_parse_v2_hdr";
struct proxy_hdr_v2 *hdr_v2;
if (*str_len < PP2_HEADER_LEN)
return ("short protocol header");
hdr_v2 = (struct proxy_hdr_v2 *) str;
if (memcmp(hdr_v2->sig, PP2_SIGNATURE, PP2_SIGNATURE_LEN) != 0)
return ("unrecognized protocol header");
if ((hdr_v2->ver_cmd & PP2_VERSION_MASK) != PP2_VERSION)
return ("unrecognized protocol version");
if (*str_len < PP2_HEADER_LEN + ntohs(hdr_v2->len))
return ("short version 2 protocol header");
switch (hdr_v2->ver_cmd & PP2_CMD_MASK) {
/*
* Proxied connection, use the proxy-provided connection info.
*/
case PP2_CMD_PROXY:
switch (hdr_v2->fam) {
case PP2_FAM_INET | PP2_TRANS_STREAM:{ /* TCP4 */
if (strchr((char *) proto_info->sa_family_list, AF_INET) == 0)
return ("Postfix IPv4 support is disabled");
if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET)
return ("short address field");
if (haproxy_srvr_parse_v2_addr_v4(hdr_v2->addr.ip4.src_addr,
hdr_v2->addr.ip4.src_port,
smtp_client_addr, smtp_client_port) < 0)
return ("client network address conversion error");
if (msg_verbose)
msg_info("%s: smtp_client_addr=%s smtp_client_port=%s",
myname, smtp_client_addr->buf, smtp_client_port->buf);
if (haproxy_srvr_parse_v2_addr_v4(hdr_v2->addr.ip4.dst_addr,
hdr_v2->addr.ip4.dst_port,
smtp_server_addr, smtp_server_port) < 0)
return ("server network address conversion error");
if (msg_verbose)
msg_info("%s: smtp_server_addr=%s smtp_server_port=%s",
myname, smtp_server_addr->buf, smtp_server_port->buf);
break;
}
case PP2_FAM_INET6 | PP2_TRANS_STREAM:{/* TCP6 */
#ifdef AF_INET6
if (strchr((char *) proto_info->sa_family_list, AF_INET6) == 0)
return ("Postfix IPv6 support is disabled");
if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET6)
return ("short address field");
if (haproxy_srvr_parse_v2_addr_v6(hdr_v2->addr.ip6.src_addr,
hdr_v2->addr.ip6.src_port,
smtp_client_addr,
smtp_client_port) < 0)
return ("client network address conversion error");
if (msg_verbose)
msg_info("%s: smtp_client_addr=%s smtp_client_port=%s",
myname, smtp_client_addr->buf, smtp_client_port->buf);
if (haproxy_srvr_parse_v2_addr_v6(hdr_v2->addr.ip6.dst_addr,
hdr_v2->addr.ip6.dst_port,
smtp_server_addr,
smtp_server_port) < 0)
return ("server network address conversion error");
if (msg_verbose)
msg_info("%s: smtp_server_addr=%s smtp_server_port=%s",
myname, smtp_server_addr->buf, smtp_server_port->buf);
break;
#else
return ("Postfix IPv6 support is not compiled in");
#endif
}
default:
return ("unsupported network protocol");
}
/* For now, skip and ignore TLVs. */
*non_proxy = 0;
*str_len = PP2_HEADER_LEN + ntohs(hdr_v2->len);
return (0);
/*
* Non-proxied connection, use the proxy-to-server connection info.
*/
case PP2_CMD_LOCAL:
/* For now, skip and ignore TLVs. */
*non_proxy = 1;
*str_len = PP2_HEADER_LEN + ntohs(hdr_v2->len);
return (0);
default:
return ("bad command in proxy header");
}
}
/* haproxy_srvr_parse - parse haproxy line */ /* haproxy_srvr_parse - parse haproxy line */
const char *haproxy_srvr_parse(const char *str, const char *haproxy_srvr_parse(const char *str, ssize_t *str_len,
int *non_proxy,
MAI_HOSTADDR_STR *smtp_client_addr, MAI_HOSTADDR_STR *smtp_client_addr,
MAI_SERVPORT_STR *smtp_client_port, MAI_SERVPORT_STR *smtp_client_port,
MAI_HOSTADDR_STR *smtp_server_addr, MAI_HOSTADDR_STR *smtp_server_addr,
MAI_SERVPORT_STR *smtp_server_port) MAI_SERVPORT_STR *smtp_server_port)
{ {
char *saved_str = mystrdup(str);
char *cp = saved_str;
const char *err; const char *err;
int addr_family;
if (proto_info == 0) if (proto_info == 0)
proto_info = inet_proto_info(); proto_info = inet_proto_info();
@ -186,130 +438,446 @@ const char *haproxy_srvr_parse(const char *str,
* XXX We don't accept connections with the "UNKNOWN" protocol type, * XXX We don't accept connections with the "UNKNOWN" protocol type,
* because those would sidestep address-based access control mechanisms. * because those would sidestep address-based access control mechanisms.
*/ */
#define NEXT_TOKEN mystrtok(&cp, " \r\n")
if (haproxy_srvr_parse_lit(NEXT_TOKEN, "PROXY", (char *) 0) < 0) /*
err = "unexpected protocol header"; * Try version 1 protocol.
else if (haproxy_srvr_parse_proto(NEXT_TOKEN, &addr_family) < 0) */
err = "unsupported protocol type"; if (strncmp(str, "PROXY ", 6) == 0) {
else if (haproxy_srvr_parse_addr(NEXT_TOKEN, smtp_client_addr, char *saved_str = mystrndup(str, *str_len);
addr_family) < 0) char *cp = saved_str;
err = "unexpected client address syntax"; char *beyond_header = split_at(saved_str, '\n');
else if (haproxy_srvr_parse_addr(NEXT_TOKEN, smtp_server_addr, int addr_family;
addr_family) < 0)
err = "unexpected server address syntax"; #define NEXT_TOKEN mystrtok(&cp, " \r")
else if (haproxy_srvr_parse_port(NEXT_TOKEN, smtp_client_port) < 0) if (beyond_header == 0)
err = "unexpected client port syntax"; err = "missing protocol header terminator";
else if (haproxy_srvr_parse_port(NEXT_TOKEN, smtp_server_port) < 0) else if (haproxy_srvr_parse_lit(NEXT_TOKEN, "PROXY", (char *) 0) < 0)
err = "unexpected server port syntax"; err = "unexpected protocol header";
else else if (haproxy_srvr_parse_proto(NEXT_TOKEN, &addr_family) < 0)
err = 0; err = "unsupported protocol type";
myfree(saved_str); else if (haproxy_srvr_parse_addr(NEXT_TOKEN, smtp_client_addr,
return (err); addr_family) < 0)
err = "unexpected client address syntax";
else if (haproxy_srvr_parse_addr(NEXT_TOKEN, smtp_server_addr,
addr_family) < 0)
err = "unexpected server address syntax";
else if (haproxy_srvr_parse_port(NEXT_TOKEN, smtp_client_port) < 0)
err = "unexpected client port syntax";
else if (haproxy_srvr_parse_port(NEXT_TOKEN, smtp_server_port) < 0)
err = "unexpected server port syntax";
else {
err = 0;
*str_len = beyond_header - saved_str;
}
myfree(saved_str);
*non_proxy = 0;
return (err);
}
/*
* Try version 2 protocol.
*/
else {
return (haproxy_srvr_parse_v2_hdr(str, str_len, non_proxy,
smtp_client_addr, smtp_client_port,
smtp_server_addr, smtp_server_port));
}
}
/* haproxy_srvr_receive - redceive and parse haproxy protocol handshake */
int haproxy_srvr_receive(int fd, int *non_proxy,
MAI_HOSTADDR_STR *smtp_client_addr,
MAI_SERVPORT_STR *smtp_client_port,
MAI_HOSTADDR_STR *smtp_server_addr,
MAI_SERVPORT_STR *smtp_server_port)
{
const char *err;
VSTRING *escape_buf;
char read_buf[HAPROXY_HEADER_MAX_LEN + 1];
ssize_t read_len;
/*
* We must not read(2) past the end of the HaProxy handshake. The v2
* protocol assumes that the handshake will never be fragmented,
* therefore we peek, parse the entire input, then read(2) only the
* number of bytes parsed.
*/
if ((read_len = recv(fd, read_buf, sizeof(read_buf) - 1, MSG_PEEK)) <= 0) {
msg_warn("haproxy read: EOF");
return (-1);
}
/*
* Parse the haproxy handshake, and determine the handshake length.
*/
read_buf[read_len] = 0;
if ((err = haproxy_srvr_parse(read_buf, &read_len, non_proxy,
smtp_client_addr, smtp_client_port,
smtp_server_addr, smtp_server_port)) != 0) {
escape_buf = vstring_alloc(read_len * 2);
escape(escape_buf, read_buf, read_len);
msg_warn("haproxy read: %s: %s", err, vstring_str(escape_buf));
vstring_free(escape_buf);
return (-1);
}
/*
* Try to pop the haproxy handshake off the input queue.
*/
if (recv(fd, read_buf, read_len, 0) != read_len) {
msg_warn("haproxy read: %m");
return (-1);
}
return (0);
} }
/* /*
* Test program. * Test program.
*/ */
#ifdef TEST #ifdef TEST
int main(int argc, char **argv)
{
/* Test cases with inputs and expected outputs. */
typedef struct TEST_CASE {
const char *haproxy_request;
const char *exp_return;
const char *exp_client_addr;
const char *exp_server_addr;
const char *exp_client_port;
const char *exp_server_port;
} TEST_CASE;
static TEST_CASE test_cases[] = {
/* IPv6. */
{"PROXY TCP6 fc:00:00:00:1:2:3:4 fc:00:00:00:4:3:2:1 123 321", 0, "fc::1:2:3:4", "fc::4:3:2:1", "123", "321"},
{"PROXY TCP6 FC:00:00:00:1:2:3:4 FC:00:00:00:4:3:2:1 123 321", 0, "fc::1:2:3:4", "fc::4:3:2:1", "123", "321"},
{"PROXY TCP6 1.2.3.4 4.3.2.1 123 321", "unexpected client address syntax"},
{"PROXY TCP6 fc:00:00:00:1:2:3:4 4.3.2.1 123 321", "unexpected server address syntax"},
/* IPv4 in IPv6. */
{"PROXY TCP6 ::ffff:1.2.3.4 ::ffff:4.3.2.1 123 321", 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP6 ::FFFF:1.2.3.4 ::FFFF:4.3.2.1 123 321", 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP4 ::ffff:1.2.3.4 ::ffff:4.3.2.1 123 321", "unexpected client address syntax"},
{"PROXY TCP4 1.2.3.4 ::ffff:4.3.2.1 123 321", "unexpected server address syntax"},
/* IPv4. */
{"PROXY TCP4 1.2.3.4 4.3.2.1 123 321", 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP4 01.02.03.04 04.03.02.01 123 321", 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123456 321", "unexpected client port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123 654321", "unexpected server port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 0123 321", "unexpected client port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123 0321", "unexpected server port syntax"},
/* Missing fields. */
{"PROXY TCP6 fc:00:00:00:1:2:3:4 fc:00:00:00:4:3:2:1 123", "unexpected server port syntax"},
{"PROXY TCP6 fc:00:00:00:1:2:3:4 fc:00:00:00:4:3:2:1", "unexpected client port syntax"},
{"PROXY TCP6 fc:00:00:00:1:2:3:4", "unexpected server address syntax"},
{"PROXY TCP6", "unexpected client address syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123", "unexpected server port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1", "unexpected client port syntax"},
{"PROXY TCP4 1.2.3.4", "unexpected server address syntax"},
{"PROXY TCP4", "unexpected client address syntax"},
/* Other. */
{"PROXY BLAH", "unsupported protocol type"},
{"BLAH", "unexpected protocol header"},
0,
};
TEST_CASE *test_case;
/*
* Test cases with inputs and expected outputs. A request may contain
* trailing garbage, and it may be too short. A v1 request may also contain
* malformed address or port information.
*/
typedef struct TEST_CASE {
const char *haproxy_request; /* v1 or v2 request including thrash */
ssize_t haproxy_req_len; /* request length including thrash */
ssize_t exp_req_len; /* parsed request length */
int exp_non_proxy; /* request is not proxied */
const char *exp_return; /* expected error string */
const char *exp_client_addr; /* expected client address string */
const char *exp_server_addr; /* expected client port string */
const char *exp_client_port; /* expected client address string */
const char *exp_server_port; /* expected server port string */
} TEST_CASE;
static TEST_CASE v1_test_cases[] = {
/* IPv6. */
{"PROXY TCP6 fc:00:00:00:1:2:3:4 fc:00:00:00:4:3:2:1 123 321\n", 0, 0, 0, 0, "fc::1:2:3:4", "fc::4:3:2:1", "123", "321"},
{"PROXY TCP6 FC:00:00:00:1:2:3:4 FC:00:00:00:4:3:2:1 123 321\n", 0, 0, 0, 0, "fc::1:2:3:4", "fc::4:3:2:1", "123", "321"},
{"PROXY TCP6 1.2.3.4 4.3.2.1 123 321\n", 0, 0, 0, "unexpected client address syntax"},
{"PROXY TCP6 fc:00:00:00:1:2:3:4 4.3.2.1 123 321\n", 0, 0, 0, "unexpected server address syntax"},
/* IPv4 in IPv6. */
{"PROXY TCP6 ::ffff:1.2.3.4 ::ffff:4.3.2.1 123 321\n", 0, 0, 0, 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP6 ::FFFF:1.2.3.4 ::FFFF:4.3.2.1 123 321\n", 0, 0, 0, 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP4 ::ffff:1.2.3.4 ::ffff:4.3.2.1 123 321\n", 0, 0, 0, "unexpected client address syntax"},
{"PROXY TCP4 1.2.3.4 ::ffff:4.3.2.1 123 321\n", 0, 0, 0, "unexpected server address syntax"},
/* IPv4. */
{"PROXY TCP4 1.2.3.4 4.3.2.1 123 321\n", 0, 0, 0, 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP4 01.02.03.04 04.03.02.01 123 321\n", 0, 0, 0, 0, "1.2.3.4", "4.3.2.1", "123", "321"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123456 321\n", 0, 0, 0, "unexpected client port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123 654321\n", 0, 0, 0, "unexpected server port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 0123 321\n", 0, 0, 0, "unexpected client port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123 0321\n", 0, 0, 0, "unexpected server port syntax"},
/* Missing fields. */
{"PROXY TCP6 fc:00:00:00:1:2:3:4 fc:00:00:00:4:3:2:1 123\n", 0, 0, 0, "unexpected server port syntax"},
{"PROXY TCP6 fc:00:00:00:1:2:3:4 fc:00:00:00:4:3:2:1\n", 0, 0, 0, "unexpected client port syntax"},
{"PROXY TCP6 fc:00:00:00:1:2:3:4\n", 0, 0, 0, "unexpected server address syntax"},
{"PROXY TCP6\n", 0, 0, 0, "unexpected client address syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1 123\n", 0, 0, 0, "unexpected server port syntax"},
{"PROXY TCP4 1.2.3.4 4.3.2.1\n", 0, 0, 0, "unexpected client port syntax"},
{"PROXY TCP4 1.2.3.4\n", 0, 0, 0, "unexpected server address syntax"},
{"PROXY TCP4\n", 0, 0, 0, "unexpected client address syntax"},
/* Other. */
{"PROXY BLAH\n", 0, 0, 0, "unsupported protocol type"},
{"BLAH\n", 0, 0, 0, "short protocol header"},
0,
};
static struct proxy_hdr_v2 v2_local_request = {
PP2_SIGNATURE, PP2_VERSION | PP2_CMD_LOCAL,
};
static TEST_CASE v2_non_proxy_test = {
(char *) &v2_local_request, PP2_HEADER_LEN, PP2_HEADER_LEN, 1,
};
#define STR(x) vstring_str(x)
#define LEN(x) VSTRING_LEN(x)
/* evaluate_test_case - evaluate one test case */
static int evaluate_test_case(const char *test_label,
const TEST_CASE *test_case)
{
/* Actual results. */ /* Actual results. */
const char *act_return; const char *act_return;
ssize_t act_req_len;
int act_non_proxy;
MAI_HOSTADDR_STR act_smtp_client_addr; MAI_HOSTADDR_STR act_smtp_client_addr;
MAI_HOSTADDR_STR act_smtp_server_addr; MAI_HOSTADDR_STR act_smtp_server_addr;
MAI_SERVPORT_STR act_smtp_client_port; MAI_SERVPORT_STR act_smtp_client_port;
MAI_SERVPORT_STR act_smtp_server_port; MAI_SERVPORT_STR act_smtp_server_port;
int test_failed;
if (msg_verbose)
msg_info("test case=%s exp_client_addr=%s exp_server_addr=%s "
"exp_client_port=%s exp_server_port=%s",
test_label, STR_OR_NULL(test_case->exp_client_addr),
STR_OR_NULL(test_case->exp_server_addr),
STR_OR_NULL(test_case->exp_client_port),
STR_OR_NULL(test_case->exp_server_port));
/*
* Start the test.
*/
test_failed = 0;
act_req_len = test_case->haproxy_req_len;
act_return =
haproxy_srvr_parse(test_case->haproxy_request, &act_req_len,
&act_non_proxy,
&act_smtp_client_addr, &act_smtp_client_port,
&act_smtp_server_addr, &act_smtp_server_port);
if (act_return != test_case->exp_return) {
msg_warn("test case %s return expected=%s actual=%s",
test_label, STR_OR_NULL(test_case->exp_return),
STR_OR_NULL(act_return));
test_failed = 1;
return (test_failed);
}
if (act_req_len != test_case->exp_req_len) {
msg_warn("test case %s str_len expected=%ld actual=%ld",
test_label,
(long) test_case->exp_req_len, (long) act_req_len);
test_failed = 1;
return (test_failed);
}
if (act_non_proxy != test_case->exp_non_proxy) {
msg_warn("test case %s non_proxy expected=%d actual=%d",
test_label,
test_case->exp_non_proxy, act_non_proxy);
test_failed = 1;
return (test_failed);
}
if (test_case->exp_non_proxy || test_case->exp_return != 0)
/* No expected address/port results. */
return (test_failed);
/*
* Compare address/port results against expected results.
*/
if (strcmp(test_case->exp_client_addr, act_smtp_client_addr.buf)) {
msg_warn("test case %s client_addr expected=%s actual=%s",
test_label,
test_case->exp_client_addr, act_smtp_client_addr.buf);
test_failed = 1;
}
if (strcmp(test_case->exp_server_addr, act_smtp_server_addr.buf)) {
msg_warn("test case %s server_addr expected=%s actual=%s",
test_label,
test_case->exp_server_addr, act_smtp_server_addr.buf);
test_failed = 1;
}
if (strcmp(test_case->exp_client_port, act_smtp_client_port.buf)) {
msg_warn("test case %s client_port expected=%s actual=%s",
test_label,
test_case->exp_client_port, act_smtp_client_port.buf);
test_failed = 1;
}
if (strcmp(test_case->exp_server_port, act_smtp_server_port.buf)) {
msg_warn("test case %s server_port expected=%s actual=%s",
test_label,
test_case->exp_server_port, act_smtp_server_port.buf);
test_failed = 1;
}
return (test_failed);
}
/* convert_v1_proxy_req_to_v2 - convert well-formed v1 proxy request to v2 */
static void convert_v1_proxy_req_to_v2(VSTRING *buf, const char *req,
ssize_t req_len)
{
const char myname[] = "convert_v1_proxy_req_to_v2";
const char *err;
int non_proxy;
MAI_HOSTADDR_STR smtp_client_addr;
MAI_SERVPORT_STR smtp_client_port;
MAI_HOSTADDR_STR smtp_server_addr;
MAI_SERVPORT_STR smtp_server_port;
struct proxy_hdr_v2 *hdr_v2;
struct addrinfo *src_res;
struct addrinfo *dst_res;
/*
* Allocate buffer space for the largest possible protocol header, so we
* don't have to worry about hidden realloc() calls.
*/
VSTRING_RESET(buf);
VSTRING_SPACE(buf, sizeof(struct proxy_hdr_v2));
hdr_v2 = (struct proxy_hdr_v2 *) STR(buf);
/*
* Fill in the header,
*/
memcpy(hdr_v2->sig, PP2_SIGNATURE, PP2_SIGNATURE_LEN);
hdr_v2->ver_cmd = PP2_VERSION | PP2_CMD_PROXY;
if ((err = haproxy_srvr_parse(req, &req_len, &non_proxy, &smtp_client_addr,
&smtp_client_port, &smtp_server_addr,
&smtp_server_port)) != 0 || non_proxy)
msg_fatal("%s: malformed or non-proxy request: %s",
myname, req);
if (hostaddr_to_sockaddr(smtp_client_addr.buf, smtp_client_port.buf, 0,
&src_res) != 0)
msg_fatal("%s: unable to convert source address %s port %s",
myname, smtp_client_addr.buf, smtp_client_port.buf);
if (hostaddr_to_sockaddr(smtp_server_addr.buf, smtp_server_port.buf, 0,
&dst_res) != 0)
msg_fatal("%s: unable to convert destination address %s port %s",
myname, smtp_server_addr.buf, smtp_server_port.buf);
if (src_res->ai_family != dst_res->ai_family)
msg_fatal("%s: mixed source/destination address families", myname);
#ifdef AF_INET6
if (src_res->ai_family == PF_INET6) {
hdr_v2->fam = PP2_FAM_INET6 | PP2_TRANS_STREAM;
hdr_v2->len = htons(PP2_ADDR_LEN_INET6);
memcpy(hdr_v2->addr.ip6.src_addr,
&SOCK_ADDR_IN6_ADDR(src_res->ai_addr),
sizeof(hdr_v2->addr.ip6.src_addr));
hdr_v2->addr.ip6.src_port = SOCK_ADDR_IN6_PORT(src_res->ai_addr);
memcpy(hdr_v2->addr.ip6.dst_addr,
&SOCK_ADDR_IN6_ADDR(dst_res->ai_addr),
sizeof(hdr_v2->addr.ip6.dst_addr));
hdr_v2->addr.ip6.dst_port = SOCK_ADDR_IN6_PORT(dst_res->ai_addr);
} else
#endif
if (src_res->ai_family == PF_INET) {
hdr_v2->fam = PP2_FAM_INET | PP2_TRANS_STREAM;
hdr_v2->len = htons(PP2_ADDR_LEN_INET);
hdr_v2->addr.ip4.src_addr = SOCK_ADDR_IN_ADDR(src_res->ai_addr).s_addr;
hdr_v2->addr.ip4.src_port = SOCK_ADDR_IN_PORT(src_res->ai_addr);
hdr_v2->addr.ip4.dst_addr = SOCK_ADDR_IN_ADDR(dst_res->ai_addr).s_addr;
hdr_v2->addr.ip4.dst_port = SOCK_ADDR_IN_PORT(dst_res->ai_addr);
} else {
msg_panic("unknown address family 0x%x", src_res->ai_family);
}
vstring_set_payload_size(buf, PP2_SIGNATURE_LEN + ntohs(hdr_v2->len));
freeaddrinfo(src_res);
freeaddrinfo(dst_res);
}
int main(int argc, char **argv)
{
VSTRING *test_label;
TEST_CASE *v1_test_case;
TEST_CASE v2_test_case;
TEST_CASE mutated_test_case;
VSTRING *v2_request_buf;
VSTRING *mutated_request_buf;
/* Findings. */ /* Findings. */
int tests_failed = 0; int tests_failed = 0;
int test_failed; int test_failed;
for (tests_failed = 0, test_case = test_cases; test_case->haproxy_request; test_label = vstring_alloc(100);
tests_failed += test_failed, test_case++) { v2_request_buf = vstring_alloc(100);
test_failed = 0; mutated_request_buf = vstring_alloc(100);
act_return =
haproxy_srvr_parse(test_case->haproxy_request, for (tests_failed = 0, v1_test_case = v1_test_cases;
&act_smtp_client_addr, &act_smtp_client_port, v1_test_case->haproxy_request != 0;
&act_smtp_server_addr, &act_smtp_server_port); tests_failed += test_failed, v1_test_case++) {
if (act_return != test_case->exp_return) {
msg_warn("test case %d return expected=%s actual=%s", /*
(int) (test_case - test_cases), * Fill in missing string length info in v1 test data.
test_case->exp_return ? */
test_case->exp_return : "(null)", if (v1_test_case->haproxy_req_len == 0)
act_return ? act_return : "(null)"); v1_test_case->haproxy_req_len =
test_failed = 1; strlen(v1_test_case->haproxy_request);
if (v1_test_case->exp_req_len == 0)
v1_test_case->exp_req_len = v1_test_case->haproxy_req_len;
/*
* Evaluate each v1 test case.
*/
vstring_sprintf(test_label, "%d", (int) (v1_test_case - v1_test_cases));
test_failed = evaluate_test_case(STR(test_label), v1_test_case);
/*
* If the v1 test input is malformed, skip the mutation tests.
*/
if (v1_test_case->exp_return != 0)
continue; continue;
}
if (test_case->exp_return != 0) /*
continue; * Mutation test: a well-formed v1 test case should still pass after
if (strcmp(test_case->exp_client_addr, act_smtp_client_addr.buf)) { * appending a byte, and should return the actual parsed header
msg_warn("test case %d client_addr expected=%s actual=%s", * length. The test uses the implicit VSTRING null safety byte.
(int) (test_case - test_cases), */
test_case->exp_client_addr, act_smtp_client_addr.buf); vstring_sprintf(test_label, "%d (one byte appended)",
test_failed = 1; (int) (v1_test_case - v1_test_cases));
} mutated_test_case = *v1_test_case;
if (strcmp(test_case->exp_server_addr, act_smtp_server_addr.buf)) { mutated_test_case.haproxy_req_len += 1;
msg_warn("test case %d server_addr expected=%s actual=%s", /* reuse v1_test_case->exp_req_len */
(int) (test_case - test_cases), test_failed += evaluate_test_case(STR(test_label), &mutated_test_case);
test_case->exp_server_addr, act_smtp_server_addr.buf);
test_failed = 1; /*
} * Mutation test: a well-formed v1 test case should fail after
if (strcmp(test_case->exp_client_port, act_smtp_client_port.buf)) { * stripping the terminator.
msg_warn("test case %d client_port expected=%s actual=%s", */
(int) (test_case - test_cases), vstring_sprintf(test_label, "%d (last byte stripped)",
test_case->exp_client_port, act_smtp_client_port.buf); (int) (v1_test_case - v1_test_cases));
test_failed = 1; mutated_test_case = *v1_test_case;
} mutated_test_case.exp_return = "missing protocol header terminator";
if (strcmp(test_case->exp_server_port, act_smtp_server_port.buf)) { mutated_test_case.haproxy_req_len -= 1;
msg_warn("test case %d server_port expected=%s actual=%s", mutated_test_case.exp_req_len = mutated_test_case.haproxy_req_len;
(int) (test_case - test_cases), test_failed += evaluate_test_case(STR(test_label), &mutated_test_case);
test_case->exp_server_port, act_smtp_server_port.buf);
test_failed = 1; /*
} * A 'well-formed' v1 test case should pass after conversion to v2.
*/
vstring_sprintf(test_label, "%d (converted to v2)",
(int) (v1_test_case - v1_test_cases));
v2_test_case = *v1_test_case;
convert_v1_proxy_req_to_v2(v2_request_buf,
v1_test_case->haproxy_request,
v1_test_case->haproxy_req_len);
v2_test_case.haproxy_request = STR(v2_request_buf);
v2_test_case.haproxy_req_len = PP2_HEADER_LEN
+ ntohs(((struct proxy_hdr_v2 *) STR(v2_request_buf))->len);
v2_test_case.exp_req_len = v2_test_case.haproxy_req_len;
test_failed += evaluate_test_case(STR(test_label), &v2_test_case);
/*
* Mutation test: a well-formed v2 test case should still pass after
* appending a byte, and should return the actual parsed header
* length. The test uses the implicit VSTRING null safety byte.
*/
vstring_sprintf(test_label, "%d (converted to v2, one byte appended)",
(int) (v1_test_case - v1_test_cases));
mutated_test_case = v2_test_case;
mutated_test_case.haproxy_req_len += 1;
/* reuse v2_test_case->exp_req_len */
test_failed += evaluate_test_case(STR(test_label), &mutated_test_case);
/*
* Mutation test: a well-formed v2 test case should fail after
* stripping one byte
*/
vstring_sprintf(test_label, "%d (converted to v2, last byte stripped)",
(int) (v1_test_case - v1_test_cases));
mutated_test_case = v2_test_case;
mutated_test_case.haproxy_req_len -= 1;
mutated_test_case.exp_req_len = mutated_test_case.haproxy_req_len;
mutated_test_case.exp_return = "short version 2 protocol header";
test_failed += evaluate_test_case(STR(test_label), &mutated_test_case);
} }
/*
* Additional V2-only tests.
*/
test_failed +=
evaluate_test_case("v2 non-proxy request", &v2_non_proxy_test);
/*
* Clean up.
*/
vstring_free(v2_request_buf);
vstring_free(mutated_request_buf);
vstring_free(test_label);
if (tests_failed) if (tests_failed)
msg_info("tests failed: %d", tests_failed); msg_info("tests failed: %d", tests_failed);
exit(tests_failed != 0); exit(tests_failed != 0);

11
postfix/src/global/haproxy_srvr.h
View File

@ -19,12 +19,14 @@
/* /*
* External interface. * External interface.
*/ */
extern const char *haproxy_srvr_parse(const char *, extern const char *haproxy_srvr_parse(const char *, ssize_t *, int *,
MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *,
MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *);
extern int haproxy_srvr_receive(int, int *,
MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *, MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *,
MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *); MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *);
#define HAPROXY_PROTO_NAME "haproxy" #define HAPROXY_PROTO_NAME "haproxy"
#define HAPROXY_MAX_LEN (256 + 2)
#ifndef DO_GRIPE #ifndef DO_GRIPE
#define DO_GRIPE 1 #define DO_GRIPE 1
@ -40,6 +42,11 @@ extern const char *haproxy_srvr_parse(const char *,
/* IBM T.J. Watson Research /* IBM T.J. Watson Research
/* P.O. Box 704 /* P.O. Box 704
/* Yorktown Heights, NY 10598, USA /* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/ /*--*/
#endif #endif

2
postfix/src/global/mail_version.h
View File

@ -20,7 +20,7 @@
* Patches change both the patchlevel and the release date. Snapshots have no * Patches change both the patchlevel and the release date. Snapshots have no
* patchlevel; they change the release date only. * patchlevel; they change the release date only.
*/ */
#define MAIL_RELEASE_DATE "20200111" #define MAIL_RELEASE_DATE "20200112"
#define MAIL_VERSION_NUMBER "3.5" #define MAIL_VERSION_NUMBER "3.5"
#ifdef SNAPSHOT #ifdef SNAPSHOT

1
postfix/src/postscreen/postscreen.h
View File

@ -568,6 +568,7 @@ typedef void (*PSC_ENDPT_LOOKUP_FN) (int, VSTREAM *,
MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *, MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *,
MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *); MAI_HOSTADDR_STR *, MAI_SERVPORT_STR *);
extern void psc_endpt_lookup(VSTREAM *, PSC_ENDPT_LOOKUP_FN); extern void psc_endpt_lookup(VSTREAM *, PSC_ENDPT_LOOKUP_FN);
extern void psc_endpt_local_lookup(VSTREAM *, PSC_ENDPT_LOOKUP_FN);
/* /*
* postscreen_access emulation. * postscreen_access emulation.

32
postfix/src/postscreen/postscreen_endpt.c
View File

@ -16,6 +16,17 @@
/* MAI_SERVPORT_STR *smtp_client_port; /* MAI_SERVPORT_STR *smtp_client_port;
/* MAI_HOSTADDR_STR *smtp_server_addr; /* MAI_HOSTADDR_STR *smtp_server_addr;
/* MAI_SERVPORT_STR *smtp_server_port; /* MAI_SERVPORT_STR *smtp_server_port;
/* AUXILIARY METHODS
/* void psc_endpt_local_lookup(smtp_client_stream, lookup_done)
/* VSTREAM *smtp_client_stream;
/* void (*lookup_done)(status, smtp_client_stream,
/* smtp_client_addr, smtp_client_port,
/* smtp_server_addr, smtp_server_port)
/* int status;
/* MAI_HOSTADDR_STR *smtp_client_addr;
/* MAI_SERVPORT_STR *smtp_client_port;
/* MAI_HOSTADDR_STR *smtp_server_addr;
/* MAI_SERVPORT_STR *smtp_server_port;
/* DESCRIPTION /* DESCRIPTION
/* psc_endpt_lookup() looks up remote and local connection /* psc_endpt_lookup() looks up remote and local connection
/* endpoint information, either through local system calls, /* endpoint information, either through local system calls,
@ -26,6 +37,10 @@
/* .IP \(bu /* .IP \(bu
/* Accept the same arguments as psc_endpt_lookup(). /* Accept the same arguments as psc_endpt_lookup().
/* .IP \(bu /* .IP \(bu
/* Call psc_endpt_local_lookup() to look up connection info
/* when the upstream proxy indicates that the connection is
/* not proxied (e.g., health check probe).
/* .IP \(bu
/* Validate protocol, address and port syntax. Permit only /* Validate protocol, address and port syntax. Permit only
/* protocols that are configured with the main.cf:inet_protocols /* protocols that are configured with the main.cf:inet_protocols
/* setting. /* setting.
@ -41,10 +56,16 @@
/* Arguments: /* Arguments:
/* .IP client_stream /* .IP client_stream
/* A brand-new stream that is connected to the remote client. /* A brand-new stream that is connected to the remote client.
/* This argument MUST be passed to psc_endpt_local_lookup()
/* if the up-stream proxy indicates that a connection is not
/* proxied.
/* .IP lookup /* .IP lookup
/* Call-back routine that reports the result status, address /* Call-back routine that reports the result status, address
/* and port information. The result status is -1 in case of /* and port information. The result status is -1 in case of
/* error, 0 in case of success. /* error, 0 in case of success. This MUST NOT be called directly
/* if the up-stream proxy indicates that a connection is not
/* proxied; instead this MUST be called indirectly by
/* psc_endpt_local_lookup().
/* LICENSE /* LICENSE
/* .ad /* .ad
/* .fi /* .fi
@ -54,6 +75,11 @@
/* IBM T.J. Watson Research /* IBM T.J. Watson Research
/* P.O. Box 704 /* P.O. Box 704
/* Yorktown Heights, NY 10598, USA /* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/ /*--*/
/* System library. */ /* System library. */
@ -105,8 +131,8 @@ static int psc_sockaddr_to_hostaddr(struct sockaddr *addr_storage,
/* psc_endpt_local_lookup - look up local system connection information */ /* psc_endpt_local_lookup - look up local system connection information */
static void psc_endpt_local_lookup(VSTREAM *smtp_client_stream, void psc_endpt_local_lookup(VSTREAM *smtp_client_stream,
PSC_ENDPT_LOOKUP_FN lookup_done) PSC_ENDPT_LOOKUP_FN lookup_done)
{ {
struct sockaddr_storage addr_storage; struct sockaddr_storage addr_storage;
SOCKADDR_SIZE addr_storage_len = sizeof(addr_storage); SOCKADDR_SIZE addr_storage_len = sizeof(addr_storage);

92
postfix/src/postscreen/postscreen_haproxy.c
View File

@ -18,8 +18,10 @@
/* MAI_SERVPORT_STR *smtp_server_port; /* MAI_SERVPORT_STR *smtp_server_port;
/* DESCRIPTION /* DESCRIPTION
/* psc_endpt_haproxy_lookup() looks up connection endpoint /* psc_endpt_haproxy_lookup() looks up connection endpoint
/* information via the haproxy protocol. Arguments and results /* information via the haproxy protocol, or looks up local
/* conform to the postscreen_endpt(3) API. /* information if the haproxy handshake indicates that a
/* connection is not proxied. Arguments and results conform
/* to the postscreen_endpt(3) API.
/* LICENSE /* LICENSE
/* .ad /* .ad
/* .fi /* .fi
@ -69,7 +71,6 @@
typedef struct { typedef struct {
VSTREAM *stream; VSTREAM *stream;
PSC_ENDPT_LOOKUP_FN notify; PSC_ENDPT_LOOKUP_FN notify;
VSTRING *buffer;
} PSC_HAPROXY_STATE; } PSC_HAPROXY_STATE;
/* psc_endpt_haproxy_event - read or time event */ /* psc_endpt_haproxy_event - read or time event */
@ -83,94 +84,32 @@ static void psc_endpt_haproxy_event(int event, void *context)
MAI_SERVPORT_STR smtp_client_port; MAI_SERVPORT_STR smtp_client_port;
MAI_HOSTADDR_STR smtp_server_addr; MAI_HOSTADDR_STR smtp_server_addr;
MAI_SERVPORT_STR smtp_server_port; MAI_SERVPORT_STR smtp_server_port;
int last_char = 0; int non_proxy = 0;
const char *err;
VSTRING *escape_buf;
char read_buf[HAPROXY_MAX_LEN];
ssize_t read_len;
char *cp;
/*
* We must not read(2) past the <CR><LF> that terminates the haproxy
* line. For efficiency reasons we read the entire haproxy line in one
* read(2) call when we know that the line is unfragmented. In the rare
* case that the line is fragmented, we fall back and read(2) it one
* character at a time.
*/
switch (event) { switch (event) {
case EVENT_TIME: case EVENT_TIME:
msg_warn("haproxy read: time limit exceeded"); msg_warn("haproxy read: time limit exceeded");
status = -1; status = -1;
break; break;
case EVENT_READ: case EVENT_READ:
/* Determine the initial VSTREAM read(2) buffer size. */ status = haproxy_srvr_receive(vstream_fileno(state->stream), &non_proxy,
if (VSTRING_LEN(state->buffer) == 0) {
if ((read_len = recv(vstream_fileno(state->stream),
read_buf, sizeof(read_buf) - 1, MSG_PEEK)) > 0
&& ((cp = memchr(read_buf, '\n', read_len)) != 0)) {
read_len = cp - read_buf + 1;
} else {
read_len = 1;
}
vstream_control(state->stream, CA_VSTREAM_CTL_BUFSIZE(read_len),
CA_VSTREAM_CTL_END);
}
/* Drain the VSTREAM buffer, otherwise this pseudo-thread will hang. */
do {
if ((last_char = VSTREAM_GETC(state->stream)) == VSTREAM_EOF) {
if (vstream_ferror(state->stream))
msg_warn("haproxy read: %m");
else
msg_warn("haproxy read: lost connection");
status = -1;
break;
}
if (VSTRING_LEN(state->buffer) >= HAPROXY_MAX_LEN) {
msg_warn("haproxy read: line too long");
status = -1;
break;
}
VSTRING_ADDCH(state->buffer, last_char);
} while (vstream_peek(state->stream) > 0);
break;
}
/*
* Parse the haproxy line. Note: the haproxy_srvr_parse() routine
* performs address protocol checks, address and port syntax checks, and
* converts IPv4-in-IPv6 address string syntax (::ffff:1.2.3.4) to IPv4
* syntax where permitted by the main.cf:inet_protocols setting.
*/
if (status == 0 && last_char == '\n') {
VSTRING_TERMINATE(state->buffer);
if ((err = haproxy_srvr_parse(vstring_str(state->buffer),
&smtp_client_addr, &smtp_client_port, &smtp_client_addr, &smtp_client_port,
&smtp_server_addr, &smtp_server_port)) != 0) { &smtp_server_addr, &smtp_server_port);
escape_buf = vstring_alloc(HAPROXY_MAX_LEN + 2);
escape(escape_buf, vstring_str(state->buffer),
VSTRING_LEN(state->buffer));
msg_warn("haproxy read: %s: %s", err, vstring_str(escape_buf));
status = -1;
vstring_free(escape_buf);
}
} }
/* /*
* Are we done yet? * Terminate this pseudo thread, and notify the caller.
*/ */
if (status < 0 || last_char == '\n') { PSC_CLEAR_EVENT_REQUEST(vstream_fileno(state->stream),
PSC_CLEAR_EVENT_REQUEST(vstream_fileno(state->stream), psc_endpt_haproxy_event, context);
psc_endpt_haproxy_event, context); if (status == 0 && non_proxy)
vstream_control(state->stream, psc_endpt_local_lookup(state->stream, state->notify);
CA_VSTREAM_CTL_BUFSIZE(VSTREAM_BUFSIZE), else
CA_VSTREAM_CTL_END);
state->notify(status, state->stream, state->notify(status, state->stream,
&smtp_client_addr, &smtp_client_port, &smtp_client_addr, &smtp_client_port,
&smtp_server_addr, &smtp_server_port); &smtp_server_addr, &smtp_server_port);
/* Note: the stream may be closed at this point. */ /* Note: the stream may be closed at this point. */
vstring_free(state->buffer); myfree((void *) state);
myfree((void *) state);
}
} }
/* psc_endpt_haproxy_lookup - event-driven haproxy client */ /* psc_endpt_haproxy_lookup - event-driven haproxy client */
@ -189,7 +128,6 @@ void psc_endpt_haproxy_lookup(VSTREAM *stream,
state = (PSC_HAPROXY_STATE *) mymalloc(sizeof(*state)); state = (PSC_HAPROXY_STATE *) mymalloc(sizeof(*state));
state->stream = stream; state->stream = stream;
state->notify = notify; state->notify = notify;
state->buffer = vstring_alloc(100);
/* /*
* Read the haproxy line. * Read the haproxy line.

5
postfix/src/postscreen/postscreen_haproxy.h
View File

@ -22,4 +22,9 @@ extern void psc_endpt_haproxy_lookup(VSTREAM *, PSC_ENDPT_LOOKUP_FN);
/* IBM T.J. Watson Research /* IBM T.J. Watson Research
/* P.O. Box 704 /* P.O. Box 704
/* Yorktown Heights, NY 10598, USA /* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/ /*--*/

1
postfix/src/smtpd/Makefile.in
View File

@ -421,6 +421,7 @@ smtpd_haproxy.o: ../../include/check_arg.h
smtpd_haproxy.o: ../../include/dns.h smtpd_haproxy.o: ../../include/dns.h
smtpd_haproxy.o: ../../include/haproxy_srvr.h smtpd_haproxy.o: ../../include/haproxy_srvr.h
smtpd_haproxy.o: ../../include/htable.h smtpd_haproxy.o: ../../include/htable.h
smtpd_haproxy.o: ../../include/iostuff.h
smtpd_haproxy.o: ../../include/mail_params.h smtpd_haproxy.o: ../../include/mail_params.h
smtpd_haproxy.o: ../../include/mail_stream.h smtpd_haproxy.o: ../../include/mail_stream.h
smtpd_haproxy.o: ../../include/milter.h smtpd_haproxy.o: ../../include/milter.h

13
postfix/src/smtpd/smtpd.c
View File

@ -5430,6 +5430,16 @@ static void smtpd_proto(SMTPD_STATE *state)
case 0: case 0:
/*
* Don't bother doing anything if some pre-SMTP handshake (haproxy)
* did not work out.
*/
if (state->flags & SMTPD_FLAG_HANGUP) {
smtpd_chat_reply(state, "421 4.3.0 %s Server local error",
var_myhostname);
break;
}
/* /*
* In TLS wrapper mode, turn on TLS using code that is shared with * In TLS wrapper mode, turn on TLS using code that is shared with
* the STARTTLS command. This code does not return when the handshake * the STARTTLS command. This code does not return when the handshake
@ -5978,8 +5988,7 @@ static void smtpd_service(VSTREAM *stream, char *service, char **argv)
/* /*
* Provide the SMTP service. * Provide the SMTP service.
*/ */
if ((state.flags & SMTPD_FLAG_HANGUP) == 0) smtpd_proto(&state);
smtpd_proto(&state);
/* /*
* After the client has gone away, clean up whatever we have set up at * After the client has gone away, clean up whatever we have set up at

3
postfix/src/smtpd/smtpd.h
View File

@ -345,7 +345,8 @@ extern void smtpd_state_reset(SMTPD_STATE *);
*/ */
extern void smtpd_peer_init(SMTPD_STATE *state); extern void smtpd_peer_init(SMTPD_STATE *state);
extern void smtpd_peer_reset(SMTPD_STATE *state); extern void smtpd_peer_reset(SMTPD_STATE *state);
extern int smtpd_peer_from_haproxy(SMTPD_STATE *state); extern void smtpd_peer_from_default(SMTPD_STATE *);
extern int smtpd_peer_from_haproxy(SMTPD_STATE *);
#define SMTPD_PEER_CODE_OK 2 #define SMTPD_PEER_CODE_OK 2
#define SMTPD_PEER_CODE_TEMP 4 #define SMTPD_PEER_CODE_TEMP 4

97
postfix/src/smtpd/smtpd_haproxy.c
View File

@ -15,6 +15,11 @@
/* The following summarizes what the Postfix SMTP server expects /* The following summarizes what the Postfix SMTP server expects
/* from an up-stream proxy adapter. /* from an up-stream proxy adapter.
/* .IP \(bu /* .IP \(bu
/* Call smtpd_peer_from_default() if the up-stream proxy
/* indicates that the connection is not proxied. In that case,
/* a proxy adapter MUST NOT update any STATE fields: the
/* smtpd_peer_from_default() function will do that instead.
/* .IP \(bu
/* Validate protocol, address and port syntax. Permit only /* Validate protocol, address and port syntax. Permit only
/* protocols that are configured with the main.cf:inet_protocols /* protocols that are configured with the main.cf:inet_protocols
/* setting. /* setting.
@ -70,6 +75,7 @@
#include <myaddrinfo.h> #include <myaddrinfo.h>
#include <mymalloc.h> #include <mymalloc.h>
#include <stringops.h> #include <stringops.h>
#include <iostuff.h>
/* Global library. */ /* Global library. */
@ -91,78 +97,39 @@
int smtpd_peer_from_haproxy(SMTPD_STATE *state) int smtpd_peer_from_haproxy(SMTPD_STATE *state)
{ {
const char *myname = "smtpd_peer_from_haproxy";
MAI_HOSTADDR_STR smtp_client_addr; MAI_HOSTADDR_STR smtp_client_addr;
MAI_SERVPORT_STR smtp_client_port; MAI_SERVPORT_STR smtp_client_port;
MAI_HOSTADDR_STR smtp_server_addr; MAI_HOSTADDR_STR smtp_server_addr;
MAI_SERVPORT_STR smtp_server_port; MAI_SERVPORT_STR smtp_server_port;
const char *proxy_err; int non_proxy = 0;
int io_err;
VSTRING *escape_buf;
/* if (read_wait(vstream_fileno(state->client), var_smtpd_uproxy_tmout) < 0) {
* While reading HAProxy handshake information, don't buffer input beyond
* the end-of-line. That would break the TLS wrappermode handshake.
*/
vstream_control(state->client,
VSTREAM_CTL_BUFSIZE, 1,
VSTREAM_CTL_END);
/*
* Note: the haproxy_srvr_parse() routine performs address protocol
* checks, address and port syntax checks, and converts IPv4-in-IPv6
* address string syntax (::ffff:1.2.3.4) to IPv4 syntax where permitted
* by the main.cf:inet_protocols setting, but logs no warnings.
*/
#define ENABLE_DEADLINE 1
smtp_stream_setup(state->client, var_smtpd_uproxy_tmout, ENABLE_DEADLINE);
switch (io_err = vstream_setjmp(state->client)) {
default:
msg_panic("%s: unhandled I/O error %d", myname, io_err);
case SMTP_ERR_EOF:
msg_warn("haproxy read: unexpected EOF");
return (-1);
case SMTP_ERR_TIME:
msg_warn("haproxy read: timeout error"); msg_warn("haproxy read: timeout error");
return (-1); return (-1);
case 0: }
if (smtp_get(state->buffer, state->client, HAPROXY_MAX_LEN, if (haproxy_srvr_receive(vstream_fileno(state->client), &non_proxy,
SMTP_GET_FLAG_NONE) != '\n') { &smtp_client_addr, &smtp_client_port,
msg_warn("haproxy read: line > %d characters", HAPROXY_MAX_LEN); &smtp_server_addr, &smtp_server_port) < 0) {
return (-1); return (-1);
} }
if ((proxy_err = haproxy_srvr_parse(STR(state->buffer), if (non_proxy) {
&smtp_client_addr, &smtp_client_port, smtpd_peer_from_default(state);
&smtp_server_addr, &smtp_server_port)) != 0) {
escape_buf = vstring_alloc(HAPROXY_MAX_LEN + 2);
escape(escape_buf, STR(state->buffer), LEN(state->buffer));
msg_warn("haproxy read: %s: %s", proxy_err, STR(escape_buf));
vstring_free(escape_buf);
return (-1);
}
state->addr = mystrdup(smtp_client_addr.buf);
if (strrchr(state->addr, ':') != 0) {
state->rfc_addr = concatenate(IPV6_COL, state->addr, (char *) 0);
state->addr_family = AF_INET6;
} else {
state->rfc_addr = mystrdup(state->addr);
state->addr_family = AF_INET;
}
state->port = mystrdup(smtp_client_port.buf);
/*
* The Dovecot authentication server needs the server IP address.
*/
state->dest_addr = mystrdup(smtp_server_addr.buf);
state->dest_port = mystrdup(smtp_server_port.buf);
/*
* Enable normal buffering.
*/
vstream_control(state->client,
VSTREAM_CTL_BUFSIZE, VSTREAM_BUFSIZE,
VSTREAM_CTL_END);
return (0); return (0);
} }
state->addr = mystrdup(smtp_client_addr.buf);
if (strrchr(state->addr, ':') != 0) {
state->rfc_addr = concatenate(IPV6_COL, state->addr, (char *) 0);
state->addr_family = AF_INET6;
} else {
state->rfc_addr = mystrdup(state->addr);
state->addr_family = AF_INET;
}
state->port = mystrdup(smtp_client_port.buf);
/*
* The Dovecot authentication server needs the server IP address.
*/
state->dest_addr = mystrdup(smtp_server_addr.buf);
state->dest_port = mystrdup(smtp_server_port.buf);
return (0);
} }

11
postfix/src/smtpd/smtpd_peer.c
View File

@ -11,6 +11,9 @@
/* /*
/* void smtpd_peer_reset(state) /* void smtpd_peer_reset(state)
/* SMTPD_STATE *state; /* SMTPD_STATE *state;
/* AUXILIARY METHODS
/* void smtpd_peer_from_default(state)
/* SMTPD_STATE *state;
/* DESCRIPTION /* DESCRIPTION
/* The smtpd_peer_init() routine attempts to produce a printable /* The smtpd_peer_init() routine attempts to produce a printable
/* version of the peer name and address of the specified socket. /* version of the peer name and address of the specified socket.
@ -96,6 +99,10 @@
/* .RE /* .RE
/* .PP /* .PP
/* smtpd_peer_reset() releases memory allocated by smtpd_peer_init(). /* smtpd_peer_reset() releases memory allocated by smtpd_peer_init().
/*
/* smtpd_peer_from_default() looks up connection information
/* when an up-stream proxy indicates that a connection is not
/* proxied.
/* LICENSE /* LICENSE
/* .ad /* .ad
/* .fi /* .fi
@ -511,7 +518,7 @@ static void smtpd_peer_from_pass_attr(SMTPD_STATE *state)
/* smtpd_peer_from_default - try to initialize peer information from socket */ /* smtpd_peer_from_default - try to initialize peer information from socket */
static void smtpd_peer_from_default(SMTPD_STATE *state) void smtpd_peer_from_default(SMTPD_STATE *state)
{ {
/* /*
@ -564,7 +571,7 @@ static void smtpd_peer_from_proxy(SMTPD_STATE *state)
break; break;
} }
if (pp->endpt_lookup(state) < 0) { if (pp->endpt_lookup(state) < 0) {
smtpd_peer_no_client(state); smtpd_peer_from_default(state);
state->flags |= SMTPD_FLAG_HANGUP; state->flags |= SMTPD_FLAG_HANGUP;
} else { } else {
smtpd_peer_hostaddr_to_sockaddr(state); smtpd_peer_hostaddr_to_sockaddr(state);