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#define _GNU_SOURCE
#include <string.h>
#include "blaze822.h"
#include "blaze822_priv.h"
int
blaze822_check_mime(struct message *msg)
{
char *v = blaze822_hdr(msg, "mime-version");
return (v &&
v[0] && v[0] == '1' &&
v[1] && v[1] == '.' &&
v[2] && v[2] == '0' &&
(!v[3] || iswsp(v[3])));
}
int
blaze822_mime_body(struct message *msg, char **cto, char **bodyo, size_t *bodyleno)
{
if (!msg->body || !msg->bodyend)
return -1;
char *ct = blaze822_hdr(msg, "content-type");
char *cte = blaze822_hdr(msg, "content-transfer-encoding");
if (!ct)
ct = "text/plain; charset=US-ASCII";
char *s = ct;
while (*s && *s != ';')
s++;
*cto = ct;
if (cte) {
if (strncasecmp(cte, "quoted-printable", 16) == 0)
blaze822_decode_qp(msg->body, msg->bodyend, bodyo, bodyleno);
else if (strncasecmp(cte, "base64", 6) == 0)
blaze822_decode_b64(msg->body, msg->bodyend, bodyo, bodyleno);
else
cte = 0;
}
if (!cte) {
*bodyo = msg->body;
*bodyleno = msg->bodyend - msg->body;
}
return 1;
}
int
blaze822_multipart(struct message *msg, struct message **imsg)
{
char *s = blaze822_hdr(msg, "content-type");
if (!s)
return 0;
while (*s && *s != ';')
s++;
if (!*s)
return 0;
// XXX scan boundary only once
char *boundary = s+1;
while (*boundary) {
while (iswsp(*boundary))
boundary++;
if (strncasecmp(boundary, "boundary=", 9) == 0) {
boundary += 9;
break;
}
boundary = strchr(boundary+1, ';');
if (!boundary)
break;
boundary++;
}
if (!boundary || !*boundary)
return 0;
char *e;
if (*boundary == '"') {
boundary++;
e = strchr(boundary, '"');
if (!e)
return 0;
} else {
e = boundary;
// XXX bchars := bcharsnospace / " "
// bcharsnospace := DIGIT / ALPHA / "'" / "(" / ")" /
// "+" / "_" / "," / "-" / "." /
// "/" / ":" / "=" / "?"
while(!iswsp(*e) && *e != ';')
e++;
e++;
}
char mboundary[256];
mboundary[0] = '-';
mboundary[1] = '-';
memcpy(mboundary+2, boundary, e-boundary); // XXX overflow
mboundary[e-boundary+2] = 0;
int boundarylen = e-boundary+2;
// printf("boundary: %s %s %s\n", ct, cte, boundary);
char *prevpart;
if (*imsg)
prevpart = (*imsg)->bodyend;
else
prevpart = msg->body;
char *part = memmem(prevpart, msg->bodyend - prevpart, mboundary, boundarylen);
if (!part)
return 0;
/// XXX access to stuff before first boundary?
part += boundarylen;
if (*part == '\r')
part++;
if (*part == '\n')
part++;
else if (*part == '-' && part < msg->bodyend && *(part+1) == '-')
return 0;
else
return 0; // XXX error condition?
char *nextpart = memmem(part, msg->bodyend - part, mboundary, boundarylen);
if (!nextpart)
return 0; // XXX error condition
*imsg = blaze822_mem(part, nextpart-part);
return 1;
}
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