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Diffstat (limited to 'contrib/sendmail/libmilter/smfi.c')
| -rw-r--r-- | contrib/sendmail/libmilter/smfi.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/contrib/sendmail/libmilter/smfi.c b/contrib/sendmail/libmilter/smfi.c new file mode 100644 index 0000000..e034aa8 --- /dev/null +++ b/contrib/sendmail/libmilter/smfi.c @@ -0,0 +1,400 @@ +/* + * Copyright (c) 1999-2000 Sendmail, Inc. and its suppliers. + * All rights reserved. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + * + */ + +#ifndef lint +static char id[] = "@(#)$Id: smfi.c,v 8.28.4.6 2000/06/28 23:48:56 gshapiro Exp $"; +#endif /* ! lint */ + +#if _FFR_MILTER +#include "libmilter.h" +#include "sendmail/useful.h" + +/* +** SMFI_ADDHEADER -- send a new header to the MTA +** +** Parameters: +** ctx -- Opaque context structure +** headerf -- Header field name +** headerv -- Header field value +** +** Returns: +** MI_SUCCESS/MI_FAILURE +*/ + +int +smfi_addheader(ctx, headerf, headerv) + SMFICTX *ctx; + char *headerf; + char *headerv; +{ + /* do we want to copy the stuff or have a special mi_wr_cmd call? */ + size_t len, l1, l2; + int r; + char *buf; + struct timeval timeout; + + if (headerf == NULL || *headerf == '\0' || headerv == NULL) + return MI_FAILURE; + if (!mi_sendok(ctx, SMFIF_ADDHDRS)) + return MI_FAILURE; + timeout.tv_sec = ctx->ctx_timeout; + timeout.tv_usec = 0; + l1 = strlen(headerf); + l2 = strlen(headerv); + len = l1 + l2 + 2; + buf = malloc(len); + if (buf == NULL) + return MI_FAILURE; + (void) memcpy(buf, headerf, l1 + 1); + (void) memcpy(buf + l1 + 1, headerv, l2 + 1); + r = mi_wr_cmd(ctx->ctx_sd, &timeout, SMFIR_ADDHEADER, buf, len); + free(buf); + return r; +} + +/* +** SMFI_CHGHEADER -- send a changed header to the MTA +** +** Parameters: +** ctx -- Opaque context structure +** headerf -- Header field name +** hdridx -- Header index value +** headerv -- Header field value +** +** Returns: +** MI_SUCCESS/MI_FAILURE +*/ + +int +smfi_chgheader(ctx, headerf, hdridx, headerv) + SMFICTX *ctx; + char *headerf; + mi_int32 hdridx; + char *headerv; +{ + /* do we want to copy the stuff or have a special mi_wr_cmd call? */ + size_t len, l1, l2; + int r; + mi_int32 v; + char *buf; + struct timeval timeout; + + if (headerf == NULL || *headerf == '\0') + return MI_FAILURE; + if (hdridx < 0) + return MI_FAILURE; + if (!mi_sendok(ctx, SMFIF_CHGHDRS)) + return MI_FAILURE; + timeout.tv_sec = ctx->ctx_timeout; + timeout.tv_usec = 0; + if (headerv == NULL) + headerv = ""; + l1 = strlen(headerf); + l2 = strlen(headerv); + len = l1 + l2 + 2 + MILTER_LEN_BYTES; + buf = malloc(len); + if (buf == NULL) + return MI_FAILURE; + v = htonl(hdridx); + (void) memcpy(&(buf[0]), (void *) &v, MILTER_LEN_BYTES); + (void) memcpy(buf + MILTER_LEN_BYTES, headerf, l1 + 1); + (void) memcpy(buf + MILTER_LEN_BYTES + l1 + 1, headerv, l2 + 1); + r = mi_wr_cmd(ctx->ctx_sd, &timeout, SMFIR_CHGHEADER, buf, len); + free(buf); + return r; +} + /* +** SMFI_ADDRCPT -- send an additional recipient to the MTA +** +** Parameters: +** ctx -- Opaque context structure +** rcpt -- recipient address +** +** Returns: +** MI_SUCCESS/MI_FAILURE +*/ + +int +smfi_addrcpt(ctx, rcpt) + SMFICTX *ctx; + char *rcpt; +{ + size_t len; + struct timeval timeout; + + if (rcpt == NULL || *rcpt == '\0') + return MI_FAILURE; + if (!mi_sendok(ctx, SMFIF_ADDRCPT)) + return MI_FAILURE; + timeout.tv_sec = ctx->ctx_timeout; + timeout.tv_usec = 0; + len = strlen(rcpt) + 1; + return mi_wr_cmd(ctx->ctx_sd, &timeout, SMFIR_ADDRCPT, rcpt, len); +} + /* +** SMFI_DELRCPT -- send a recipient to be removed to the MTA +** +** Parameters: +** ctx -- Opaque context structure +** rcpt -- recipient address +** +** Returns: +** MI_SUCCESS/MI_FAILURE +*/ + +int +smfi_delrcpt(ctx, rcpt) + SMFICTX *ctx; + char *rcpt; +{ + size_t len; + struct timeval timeout; + + if (rcpt == NULL || *rcpt == '\0') + return MI_FAILURE; + if (!mi_sendok(ctx, SMFIF_DELRCPT)) + return MI_FAILURE; + timeout.tv_sec = ctx->ctx_timeout; + timeout.tv_usec = 0; + len = strlen(rcpt) + 1; + return mi_wr_cmd(ctx->ctx_sd, &timeout, SMFIR_DELRCPT, rcpt, len); +} + /* +** SMFI_REPLACEBODY -- send a body chunk to the MTA +** +** Parameters: +** ctx -- Opaque context structure +** bodyp -- body chunk +** bodylen -- length of body chunk +** +** Returns: +** MI_SUCCESS/MI_FAILURE +*/ + +int +smfi_replacebody(ctx, bodyp, bodylen) + SMFICTX *ctx; + u_char *bodyp; + int bodylen; +{ + int len, off, r; + struct timeval timeout; + + if (bodyp == NULL && bodylen > 0) + return MI_FAILURE; + if (!mi_sendok(ctx, SMFIF_CHGBODY)) + return MI_FAILURE; + timeout.tv_sec = ctx->ctx_timeout; + timeout.tv_usec = 0; + + /* split body chunk if necessary */ + off = 0; + while (bodylen > 0) + { + len = (bodylen >= MILTER_CHUNK_SIZE) ? MILTER_CHUNK_SIZE : + bodylen; + if ((r = mi_wr_cmd(ctx->ctx_sd, &timeout, SMFIR_REPLBODY, + (char *) (bodyp + off), len)) != MI_SUCCESS) + return r; + off += len; + bodylen -= len; + } + return MI_SUCCESS; +} + /* +** MYISENHSC -- check whether a string contains an enhanced status code +** +** Parameters: +** s -- string with possible enhanced status code. +** delim -- delim for enhanced status code. +** +** Returns: +** 0 -- no enhanced status code. +** >4 -- length of enhanced status code. +** +** Side Effects: +** none. +*/ +static int +myisenhsc(s, delim) + const char *s; + int delim; +{ + int l, h; + + if (s == NULL) + return 0; + if (!((*s == '2' || *s == '4' || *s == '5') && s[1] == '.')) + return 0; + h = 0; + l = 2; + while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h])) + ++h; + if (h == 0 || s[l + h] != '.') + return 0; + l += h + 1; + h = 0; + while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h])) + ++h; + if (h == 0 || s[l + h] != delim) + return 0; + return l + h; +} + /* +** SMFI_SETREPLY -- set the reply code for the next reply to the MTA +** +** Parameters: +** ctx -- Opaque context structure +** rcode -- The three-digit (RFC 821) SMTP reply code. +** xcode -- The extended (RFC 2034) reply code. +** message -- The text part of the SMTP reply. +** +** Returns: +** MI_SUCCESS/MI_FAILURE +*/ + +int +smfi_setreply(ctx, rcode, xcode, message) + SMFICTX *ctx; + char *rcode; + char *xcode; + char *message; +{ + size_t len, l1, l2, l3; + char *buf; + + if (rcode == NULL || ctx == NULL) + return MI_FAILURE; + l1 = strlen(rcode) + 1; + if (l1 != 4) + return MI_FAILURE; + if ((rcode[0] != '4' && rcode[0] != '5') || + !isascii(rcode[1]) || !isdigit(rcode[1]) || + !isascii(rcode[2]) || !isdigit(rcode[2])) + return MI_FAILURE; + l2 = xcode == NULL ? 1 : strlen(xcode) + 1; + if (xcode != NULL && !myisenhsc(xcode, '\0')) + return MI_FAILURE; + l3 = message == NULL ? 1 : strlen(message) + 1; + len = l1 + l2 + l3; + buf = malloc(len); + if (buf == NULL) + return MI_FAILURE; /* oops */ + (void) snprintf(buf, len, "%s %s %s", rcode, + xcode == NULL ? "" : xcode, + message == NULL ? "" : message); + if (ctx->ctx_reply != NULL) + free(ctx->ctx_reply); + ctx->ctx_reply = buf; + return MI_SUCCESS; +} + /* +** SMFI_SETPRIV -- set private data +** +** Parameters: +** ctx -- Opaque context structure +** privatedata -- pointer to private data +** +** Returns: +** MI_SUCCESS/MI_FAILURE +*/ + +int +smfi_setpriv(ctx, privatedata) + SMFICTX *ctx; + void *privatedata; +{ + if (ctx == NULL) + return MI_FAILURE; + ctx->ctx_privdata = privatedata; + return MI_SUCCESS; +} + /* +** SMFI_GETPRIV -- get private data +** +** Parameters: +** ctx -- Opaque context structure +** +** Returns: +** pointer to private data +*/ + +void * +smfi_getpriv(ctx) + SMFICTX *ctx; +{ + if (ctx == NULL) + return NULL; + return ctx->ctx_privdata; +} + /* +** SMFI_GETSYMVAL -- get the value of a macro +** +** See explanation in mfapi.h about layout of the structures. +** +** Parameters: +** ctx -- Opaque context structure +** symname -- name of macro +** +** Returns: +** value of macro (NULL in case of failure) +*/ + +char * +smfi_getsymval(ctx, symname) + SMFICTX *ctx; + char *symname; +{ + int i; + char **s; + char one[2]; + char braces[4]; + + if (ctx == NULL || symname == NULL || *symname == '\0') + return NULL; + + if (strlen(symname) == 3 && symname[0] == '{' && symname[2] == '}') + { + one[0] = symname[1]; + one[1] = '\0'; + } + else + one[0] = '\0'; + if (strlen(symname) == 1) + { + braces[0] = '{'; + braces[1] = *symname; + braces[2] = '}'; + braces[3] = '\0'; + } + else + braces[0] = '\0'; + + /* search backwards through the macro array */ + for (i = MAX_MACROS_ENTRIES - 1 ; i >= 0; --i) + { + if ((s = ctx->ctx_mac_ptr[i]) == NULL || + ctx->ctx_mac_buf[i] == NULL) + continue; + while (s != NULL && *s != NULL) + { + if (strcmp(*s, symname) == 0) + return *++s; + if (one[0] != '\0' && strcmp(*s, one) == 0) + return *++s; + if (braces[0] != '\0' && strcmp(*s, braces) == 0) + return *++s; + ++s; /* skip over macro value */ + ++s; /* points to next macro name */ + } + } + return NULL; +} +#endif /* _FFR_MILTER */ |
