diff options
Diffstat (limited to 'src/global/verify_clnt.c')
| -rw-r--r-- | src/global/verify_clnt.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/src/global/verify_clnt.c b/src/global/verify_clnt.c new file mode 100644 index 0000000..bda4eb0 --- /dev/null +++ b/src/global/verify_clnt.c @@ -0,0 +1,309 @@ +/*++ +/* NAME +/* verify_clnt 3 +/* SUMMARY +/* address verification client interface +/* SYNOPSIS +/* #include <verify_clnt.h> +/* +/* int verify_clnt_query(addr, status, why) +/* const char *addr; +/* int *status; +/* VSTRING *why; +/* +/* int verify_clnt_update(addr, status, why) +/* const char *addr; +/* int status; +/* const char *why; +/* DESCRIPTION +/* verify_clnt_query() requests information about the given address. +/* The result value is one of the valid status values (see +/* status description below). +/* In all cases the \fBwhy\fR argument provides additional +/* information. +/* +/* verify_clnt_update() requests that the status of the specified +/* address be updated. The result status is DEL_REQ_RCPT_STAT_OK upon +/* success, DEL_REQ_RCPT_STAT_DEFER upon failure. +/* +/* Arguments +/* .IP addr +/* The email address in question. +/* .IP status +/* One of the following status codes: +/* .RS +/* .IP DEL_REQ_RCPT_STAT_OK +/* The mail system did not detect any problems. +/* .IP DEL_REQ_RCPT_STAT_DEFER +/* The status of the address is indeterminate. +/* .IP DEL_REQ_RCPT_STAT_BOUNCE +/* The address is permanently undeliverable. +/* .RE +/* .IP why +/* textual description of the status. +/* DIAGNOSTICS +/* These functions return VRFY_STAT_OK in case of success, +/* VRFY_STAT_BAD in case of a malformed request, and +/* VRFY_STAT_FAIL when the operation failed. +/* SEE ALSO +/* verify(8) Postfix address verification server +/* LICENSE +/* .ad +/* .fi +/* The Secure Mailer license must be distributed with this software. +/* AUTHOR(S) +/* Wietse Venema +/* IBM T.J. Watson Research +/* P.O. Box 704 +/* Yorktown Heights, NY 10598, USA +/* +/* Wietse Venema +/* Google, Inc. +/* 111 8th Avenue +/* New York, NY 10011, USA +/*--*/ + +/* System library. */ + +#include <sys_defs.h> +#include <unistd.h> +#include <errno.h> + +/* Utility library. */ + +#include <msg.h> +#include <vstream.h> +#include <vstring.h> +#include <attr.h> + +/* Global library. */ + +#include <mail_params.h> +#include <mail_proto.h> +#include <clnt_stream.h> +#include <verify_clnt.h> + +CLNT_STREAM *vrfy_clnt; + +/* verify_clnt_handshake - receive server protocol announcement */ + +static int verify_clnt_handshake(VSTREAM *stream) +{ + return (attr_scan(stream, ATTR_FLAG_STRICT, + RECV_ATTR_STREQ(MAIL_ATTR_PROTO, MAIL_ATTR_PROTO_VERIFY), + ATTR_TYPE_END)); +} + +/* verify_clnt_init - initialize */ + +static void verify_clnt_init(void) +{ + if (vrfy_clnt != 0) + msg_panic("verify_clnt_init: multiple initialization"); + vrfy_clnt = clnt_stream_create(MAIL_CLASS_PRIVATE, var_verify_service, + var_ipc_idle_limit, var_ipc_ttl_limit, + verify_clnt_handshake); +} + +/* verify_clnt_query - request address verification status */ + +int verify_clnt_query(const char *addr, int *addr_status, VSTRING *why) +{ + VSTREAM *stream; + int request_status; + int count = 0; + + /* + * Do client-server plumbing. + */ + if (vrfy_clnt == 0) + verify_clnt_init(); + + /* + * Request status for this address. + */ + for (;;) { + stream = clnt_stream_access(vrfy_clnt); + errno = 0; + count += 1; + if (stream == 0 + || attr_print(stream, ATTR_FLAG_NONE, + SEND_ATTR_STR(MAIL_ATTR_REQ, VRFY_REQ_QUERY), + SEND_ATTR_STR(MAIL_ATTR_ADDR, addr), + ATTR_TYPE_END) != 0 + || vstream_fflush(stream) + || attr_scan(stream, ATTR_FLAG_MISSING, + RECV_ATTR_INT(MAIL_ATTR_STATUS, &request_status), + RECV_ATTR_INT(MAIL_ATTR_ADDR_STATUS, addr_status), + RECV_ATTR_STR(MAIL_ATTR_WHY, why), + ATTR_TYPE_END) != 3) { + if (msg_verbose || count > 1 || (errno && errno != EPIPE && errno != ENOENT)) + msg_warn("problem talking to service %s: %m", + var_verify_service); + } else { + break; + } + sleep(1); + clnt_stream_recover(vrfy_clnt); + } + return (request_status); +} + +/* verify_clnt_update - request address status update */ + +int verify_clnt_update(const char *addr, int addr_status, const char *why) +{ + VSTREAM *stream; + int request_status; + + /* + * Do client-server plumbing. + */ + if (vrfy_clnt == 0) + verify_clnt_init(); + + /* + * Send status for this address. Supply a default status if the address + * verification service is unavailable. + */ + for (;;) { + stream = clnt_stream_access(vrfy_clnt); + errno = 0; + if (stream == 0 + || attr_print(stream, ATTR_FLAG_NONE, + SEND_ATTR_STR(MAIL_ATTR_REQ, VRFY_REQ_UPDATE), + SEND_ATTR_STR(MAIL_ATTR_ADDR, addr), + SEND_ATTR_INT(MAIL_ATTR_ADDR_STATUS, addr_status), + SEND_ATTR_STR(MAIL_ATTR_WHY, why), + ATTR_TYPE_END) != 0 + || attr_scan(stream, ATTR_FLAG_MISSING, + RECV_ATTR_INT(MAIL_ATTR_STATUS, &request_status), + ATTR_TYPE_END) != 1) { + if (msg_verbose || (errno != EPIPE && errno != ENOENT)) + msg_warn("problem talking to service %s: %m", + var_verify_service); + } else { + break; + } + sleep(1); + clnt_stream_recover(vrfy_clnt); + } + return (request_status); +} + + /* + * Proof-of-concept test client program. + */ +#ifdef TEST + +#include <stdlib.h> +#include <ctype.h> +#include <stdlib.h> +#include <unistd.h> +#include <signal.h> +#include <msg_vstream.h> +#include <stringops.h> +#include <vstring_vstream.h> +#include <mail_conf.h> + +#define STR(x) vstring_str(x) + +static NORETURN usage(char *myname) +{ + msg_fatal("usage: %s [-v]", myname); +} + +static void query(char *query, VSTRING *buf) +{ + int status; + + switch (verify_clnt_query(query, &status, buf)) { + case VRFY_STAT_OK: + vstream_printf("%-10s %d\n", "status", status); + vstream_printf("%-10s %s\n", "text", STR(buf)); + vstream_fflush(VSTREAM_OUT); + break; + case VRFY_STAT_BAD: + msg_warn("bad request format"); + break; + case VRFY_STAT_FAIL: + msg_warn("request failed"); + break; + } +} + +static void update(char *query) +{ + char *addr; + char *status_text; + char *cp = query; + + if ((addr = mystrtok(&cp, CHARS_SPACE)) == 0 + || (status_text = mystrtok(&cp, CHARS_SPACE)) == 0) { + msg_warn("bad request format"); + return; + } + while (*cp && ISSPACE(*cp)) + cp++; + if (*cp == 0) { + msg_warn("bad request format"); + return; + } + switch (verify_clnt_update(query, atoi(status_text), cp)) { + case VRFY_STAT_OK: + vstream_printf("OK\n"); + vstream_fflush(VSTREAM_OUT); + break; + case VRFY_STAT_BAD: + msg_warn("bad request format"); + break; + case VRFY_STAT_FAIL: + msg_warn("request failed"); + break; + } +} + +int main(int argc, char **argv) +{ + VSTRING *buffer = vstring_alloc(1); + char *cp; + int ch; + char *command; + + signal(SIGPIPE, SIG_IGN); + + msg_vstream_init(argv[0], VSTREAM_ERR); + + mail_conf_read(); + msg_info("using config files in %s", var_config_dir); + if (chdir(var_queue_dir) < 0) + msg_fatal("chdir %s: %m", var_queue_dir); + + while ((ch = GETOPT(argc, argv, "v")) > 0) { + switch (ch) { + case 'v': + msg_verbose++; + break; + default: + usage(argv[0]); + } + } + if (argc - optind > 1) + usage(argv[0]); + + while (vstring_fgets_nonl(buffer, VSTREAM_IN)) { + cp = STR(buffer); + if ((command = mystrtok(&cp, CHARS_SPACE)) == 0) + continue; + if (strcmp(command, "query") == 0) + query(cp, buffer); + else if (strcmp(command, "update") == 0) + update(cp); + else + msg_warn("unrecognized command: %s", command); + } + vstring_free(buffer); + return (0); +} + +#endif |