diff options
Diffstat (limited to 'transact.c')
| -rw-r--r-- | transact.c | 136 |
1 files changed, 76 insertions, 60 deletions
@@ -1,5 +1,5 @@ -/* - * transact.c -- transaction primitives for the fetchmail driver loop +/** + * \file transact.c -- transaction primitives for the fetchmail driver loop * * Copyright 2001 by Eric S. Raymond * For license terms, see the file COPYING in this directory. @@ -37,32 +37,39 @@ #include "socket.h" #include "fetchmail.h" +/** Macro to clamp the argument so it is >= INT_MIN. */ #define _FIX_INT_MIN(x) ((x) < INT_MIN ? INT_MIN : (x)) +/** Macro to clamp the argument so it is <= INT_MAX. */ #define _FIX_INT_MAX(x) ((x) > INT_MAX ? INT_MAX : (x)) +/** Macro to clamp the argument so it is representable as an int. */ #define CAST_TO_INT(x) ((int)(_FIX_INT_MIN(_FIX_INT_MAX(x)))) +/** Macro to clamp the unsigned argument so it is representable as an int. */ #define UCAST_TO_INT(x) ((int)(_FIX_INT_MAX(x))) /* global variables: please reinitialize them explicitly for proper * working in daemon mode */ /* session variables initialized in init_transact() */ -int suppress_tags = FALSE; /* emit tags? */ -char tag[TAGLEN]; -static int tagnum; +int suppress_tags = FALSE; /**< emit tags in the protocol? */ +char tag[TAGLEN]; /**< buffer for the tag */ +static int tagnum; /**< local counter for the tag */ +/** Macro to generate the tag and store it in #tag. */ #define GENSYM (sprintf(tag, "A%04d", ++tagnum % TAGMOD), tag) -static const struct method *protocol; -char shroud[PASSWORDLEN*2+3]; /* string to shroud in debug output */ +static const struct method *protocol; /**< description of the protocol used for the current poll */ +char shroud[PASSWORDLEN*2+3]; /**< string to shroud in debug output */ /* session variables initialized in do_session() */ -int mytimeout; /* value of nonreponse timeout */ +int mytimeout; /**< value of nonreponse timeout */ /* mail variables initialized in readheaders() */ -struct msgblk msgblk; -static int accept_count, reject_count; +struct msgblk msgblk; /**< stores attributes of the currently processed message */ +static int accept_count /** count of accepted recipients */, reject_count /** count of rejected recipients */; /** add given address to xmit_names if it exactly matches a full address * \returns nonzero if matched */ -static int map_address(const char *addr, struct query *ctl, struct idlist **xmit_names) +static int map_address(const char *addr,/**< address to match */ + struct query *ctl, /**< contains list of aliases */ + struct idlist **xmit_names /**< list of recipient names */) { const char *lname; @@ -78,9 +85,9 @@ static int map_address(const char *addr, struct query *ctl, struct idlist **xmit /** add given name to xmit_names if it matches declared localnames */ static void map_name(const char *name, struct query *ctl, struct idlist **xmit_names) -/* name: name to map */ -/* ctl: list of permissible aliases */ -/* xmit_names: list of recipient names parsed out */ +/** \param name name to map */ +/** \param ctl list of permissible aliases */ +/** \param xmit_names list of recipient names parsed out */ { const char *lname; @@ -100,10 +107,10 @@ static void map_name(const char *name, struct query *ctl, struct idlist **xmit_n static void find_server_names(const char *hdr, struct query *ctl, struct idlist **xmit_names) -/* parse names out of a RFC822 header into an ID list */ -/* hdr: RFC822 header in question */ -/* ctl: list of permissible aliases */ -/* xmit_names: list of recipient names parsed out */ +/** parse names out of a RFC822 header into an ID list */ +/** \param hdr RFC822 header in question */ +/** \param ctl list of permissible aliases */ +/** \param xmit_names list of recipient names parsed out */ { if (hdr == (char *)NULL) return; @@ -190,12 +197,12 @@ static void find_server_names(const char *hdr, } } -/* +/** * Return zero on a syntactically invalid address, nz on a valid one. * * This used to be strchr(a, '.'), but it turns out that lines like this * - * Received: from punt-1.mail.demon.net by mailstore for markb@ordern.com + * Received: from punt-1.mail.demon.net by mailstore for markb@example.com * id 938765929:10:27223:2; Fri, 01 Oct 99 08:18:49 GMT * * are not uncommon. So now we just check that the following token is @@ -203,22 +210,24 @@ static void find_server_names(const char *hdr, */ #define VALID_ADDRESS(a) (!strchr((a), '@')) -static char *parse_received(struct query *ctl, char *bufp) -/* try to extract real address from the Received line */ -/* If a valid Received: line is found, we return the full address in - * a buffer which can be parsed from nxtaddr(). This is to ansure that +/** write \a value into \a rbuf, indexed by \a tp, if there is + * sufficient room left. */ +#define RBUF_WRITE(value) do { if (tp < rbuf+sizeof(rbuf)-1) *tp++=(value); } while(0) + +/** Try to extract real address from the Received line. + * If a valid Received: line is found, we return the full address in + * a buffer which can be parsed from nxtaddr(). This is to ensure that * the local domain part of the address can be passed along in * find_server_names() if it contains one. * Note: We should return a dummy header containing the address * which makes nxtaddr() behave correctly. */ +static char *parse_received(struct query *ctl, char *bufp) { char *base, *ok = (char *)NULL; static char rbuf[HOSTLEN + USERNAMELEN + 4]; struct addrinfo *ai0; -#define RBUF_WRITE(value) do { if (tp < rbuf+sizeof(rbuf)-1) *tp++=(value); } while(0) - /* * Try to extract the real envelope addressee. We look here * specifically for the mailserver's Received line. @@ -364,7 +373,7 @@ static char *parse_received(struct query *ctl, char *bufp) } /* shared by readheaders and readbody */ -static int sizeticker; +static int sizeticker; /**< internal state variable for print_ticker() */ /** Print ticker based on a amount of data transferred of \a bytes. * Increments \a *tickervar by \a bytes, and if it exceeds @@ -383,30 +392,32 @@ static void print_ticker(int *tickervar, int bytes) } } +/** Check if \a s is equal to a LF or CR LF sequence, followed by a NUL + * byte. \todo FIXME merge this with end_of_header? */ #define EMPTYLINE(s) (((s)[0] == '\r' && (s)[1] == '\n' && (s)[2] == '\0') \ || ((s)[0] == '\n' && (s)[1] == '\0')) +/** Check if \a s is an empty line. Accept "\r*\n" as EOH in order to be bulletproof against broken survers */ static int end_of_header (const char *s) -/* accept "\r*\n" as EOH in order to be bulletproof against broken survers */ { while (s[0] == '\r') s++; return (s[0] == '\n' && s[1] == '\0'); } +/** read message headers and ship to SMTP or MDA */ int readheaders(int sock, long fetchlen, long reallen, struct query *ctl, int num, flag *suppress_readbody) -/* read message headers and ship to SMTP or MDA */ -/* sock: to which the server is connected */ -/* fetchlen: length of message according to fetch response */ -/* reallen: length of message according to getsizes */ -/* ctl: query control record */ -/* num: index of message */ -/* suppress_readbody: whether call to readbody() should be supressed */ +/** \param sock to which the server is connected */ +/** \param fetchlen length of message according to fetch response */ +/** \param reallen length of message according to getsizes */ +/** \param ctl query control record */ +/** \param num index of message */ +/** \param suppress_readbody output: whether call to readbody() should be supressed */ { struct addrblk { @@ -1373,11 +1384,11 @@ process_headers: } int readbody(int sock, struct query *ctl, flag forward, int len) -/* read and dispose of a message body presented on sock */ -/* ctl: query control record */ -/* sock: to which the server is connected */ -/* len: length of message */ -/* forward: TRUE to forward */ +/** read and dispose of a message body presented on \a sock */ +/** \param ctl query control record */ +/** \param sock to which the server is connected */ +/** \param forward TRUE to forward */ +/** \param len length of message */ { int linelen; char buf[MSGBUFSIZE+4]; @@ -1487,7 +1498,7 @@ int readbody(int sock, struct query *ctl, flag forward, int len) } void init_transact(const struct method *proto) -/* initialize state for the send and receive functions */ +/** initialize state for the send and receive functions */ { suppress_tags = FALSE; tagnum = 0; @@ -1496,8 +1507,8 @@ void init_transact(const struct method *proto) shroud[0] = '\0'; } +/** shroud a password in the given buffer */ static void enshroud(char *buf) -/* shroud a password in the given buffer */ { char *cp; @@ -1514,14 +1525,14 @@ static void enshroud(char *buf) } #if defined(HAVE_STDARG_H) +/** assemble command in printf(3) style and send to the server */ void gen_send(int sock, const char *fmt, ... ) #else void gen_send(sock, fmt, va_alist) -int sock; /* socket to which server is connected */ -const char *fmt; /* printf-style format */ +int sock; /** socket to which server is connected */ +const char *fmt; /** printf-style format */ va_dcl #endif -/* assemble command in printf(3) style and send to the server */ { char buf [MSGBUFSIZE+1]; va_list ap; @@ -1552,8 +1563,8 @@ va_dcl /** get one line of input from the server */ int gen_recv(int sock /** socket to which server is connected */, - char *buf /* buffer to receive input */, - int size /* length of buffer */) + char *buf /** buffer to receive input */, + int size /** length of buffer */) { size_t n; int oldphase = phase; /* we don't have to be re-entrant */ @@ -1587,19 +1598,20 @@ int gen_recv(int sock /** socket to which server is connected */, } } -/* +/** \addtogroup gen_recv_split + * @{ * gen_recv_split() splits the response from a server which is too * long to fit into the buffer into multiple lines. If the prefix is * set as "MY FEATURES" and the response from the server is too long * to fit in the buffer, as in: * - * "MY FEATURES ABC DEF GHI JKLMNOPQRS TU VWX YZ" + * "MY FEATURES ABC DEF GHI JKLMNOPQRS TU VWX YZ" * * Repeated calls to gen_recv_split() may return: * - * "MY FEATURES ABC DEF GHI" - * "MY FEATURES JKLMNOPQRS" - * "MY FEATURES TU VWX YZ" + * "MY FEATURES ABC DEF GHI" + * "MY FEATURES JKLMNOPQRS" + * "MY FEATURES TU VWX YZ" * * A response not beginning with the prefix "MY FEATURES" will not be * split. @@ -1611,17 +1623,20 @@ int gen_recv(int sock /** socket to which server is connected */, * size as the "buf" array in struct RecvSplit */ -/* If this happens, the calling site needs to be adjusted to set - * a shorter prefix, or the prefix capacity needs to be raised in - * struct RecvSplit. */ - __attribute__((noreturn)) +static void overrun(const char *f, size_t l) __attribute__((noreturn)); + +/** Internal error report function. If this happens, the calling site + * needs to be adjusted to set a shorter prefix, or the prefix capacity + * needs to be raised in struct RecvSplit. */ static void overrun(const char *f, size_t l) { report(stderr, GT_("Buffer too small. This is a bug in the caller of %s:%lu.\n"), f, (unsigned long)l); abort(); } -void gen_recv_split_init (const char *prefix, struct RecvSplit *rs) +/** Initialize \a rs for later use by gen_recv_split. */ +void gen_recv_split_init (const char *prefix /** prefix to match/repeat */, + struct RecvSplit *rs /** structure to be initialized */) { if (strlcpy(rs->prefix, prefix, sizeof(rs->prefix)) > sizeof(rs->prefix)) overrun(__FILE__, __LINE__); @@ -1707,16 +1722,17 @@ int gen_recv_split(int sock /** socket to which server is connected */, report(stdout, "%s< %s%s...\n", protocol->name, rs->prefix, rs->buf); return(PS_SUCCESS); } +/** @} */ #if defined(HAVE_STDARG_H) int gen_transact(int sock, const char *fmt, ... ) #else int gen_transact(int sock, fmt, va_alist) -int sock; /* socket to which server is connected */ -const char *fmt; /* printf-style format */ +int sock; /** socket to which server is connected */ +const char *fmt; /** printf-style format */ va_dcl #endif -/* assemble command in printf(3) style, send to server, accept a response */ +/** assemble command in printf(3) style, send to server, fetch a response */ { int ok; char buf [MSGBUFSIZE+1]; |