/* find_http_req DATA LEN FOUND FOUNDLEN
* Look for an HTTP request and response in buffer DATA of length LEN. The
* return value is a pointer into DATA suitable for a subsequent call to this
* function; *FOUND is either NULL, or a pointer to the start of an HTTP
* request; in the latter case, *FOUNDLEN is the length of the match
* containing enough information to obtain the URL. */
unsigned char *find_http_req(const unsigned char *data, const size_t len, unsigned char **http, size_t *httplen) {
unsigned char *req, *le, *blankline, *hosthdr;
#define remaining(x) (len - (data - (x)))
#define MAX_REQ 16384
/* HTTP requests look like:
*
* GET {path} HTTP/1.(0|1)\r\n
* header: value\r\n
* ...
* \r\n
*
* We may care about the Host: header in the request. */
if (len < 40)
return (unsigned char*)data;
if (!(req = memstr(data, len, (unsigned char*) "GET ", 4)))
return (unsigned char*)(data + len - 4);
/* Find the end of the request line. */
if (!(le = memstr(req + 4, remaining(req + 4), (unsigned char*) "\r\n", 2))) {
if (remaining(req + 4) > MAX_REQ)
return (unsigned char*)(req + 4);
else
return (unsigned char*)req;
}
/* Not enough space for a path. */
if (le < req + 5)
return le + 2;
/* Not an HTTP request, just a line starting GET.... */
if (memcmp(le - 9, " HTTP/1.", 8) || !strchr("01", (int)*(le - 1)))
return le + 2;
/* Find the end of the request headers. */
if (!(blankline = memstr(le + 2, remaining(le + 2), (unsigned char*) "\r\n\r\n", 4))) {
if (remaining(le + 2) > MAX_REQ)
return (unsigned char*)(data + len - 4);
else
return req;
}
if (memcmp(req + 4, "http://", 7) == 0)
/* Probably a cache request; in any case, don't need to look for a Host:. */
goto found;
/* Is there a Host: header? */
if (!(hosthdr = memstr(le, blankline - le + 2, (unsigned char*) "\r\nHost: ", 8))) {
return blankline + 4;
}
found:
*http = req;
*httplen = blankline - req;
return blankline + 4;
}
TEST(MiscTests, MemStr) {
const char text[] = "zaqwsxcderfv543\xa6\00bnmjhgfrtcsKOTEKequdo825dgqjx92jdDCSIvfds9*%c3@^((b%^((*gswtysirkkwpfceoioGt7j";
const char pat1[] = "KOTEK";
const char pat2[] = "KO£EK";
EXPECT_NE(memstr(text, pat1, sizeof(pat1) - 1), nullptr);
EXPECT_EQ(memstr(text, pat2, sizeof(pat2) - 1), nullptr);
}
unsigned char *find_jpeg_image(const unsigned char *data, const size_t len, unsigned char **jpegdata, size_t *jpeglen)
{
unsigned char *jpeghdr;
*jpegdata = NULL;
*jpeglen = 0;
if (data == NULL) {
return NULL;
}
/* find SOI marker */
jpeghdr = memstr(data, len, (unsigned char*)"\xff\xd8", 2);
if (!jpeghdr) return (unsigned char*)(data + len - 1);
jpg_segment_t* segment;
unsigned int segment_lenght = 2;
unsigned char *block = jpeghdr;
do {
/* more data to advance ? */
if (data + len < block + segment_lenght) {
break;
}
/* advance to next block */
block = block + segment_lenght;
segment = (jpg_segment_t*) block;
segment_lenght = is_jpeg_segment(segment);
/*
* start of scan
*
* XXX: dunno how to parse...
*/
if (segment->marker_type == SOS) {
block = memstr(block, len - (block - data), (unsigned char*)"\xff\xd9", 2);
if (block) {
*jpegdata = jpeghdr;
*jpeglen = block + 2 - jpeghdr;
return block + 2;
} else break;
}
} while (segment_lenght != 0);
return jpeghdr;
}
// 粘贴内存解析战果
BOOL CAirLogEx::PasteMemory(CHAR* lpMemory, DWORD dwsize)
{
DWORD dwOutsize = 0;
CHAR* lpfltMemory = this->CharFilter(lpMemory, dwsize, FILTER_CHAR, &dwOutsize);
BOOL bRet = FALSE;
if (lpfltMemory)
{
CHAR* lpHead = memstr(lpfltMemory, BLOCK_ENDOFGAMESTATS, dwOutsize);
if (lpHead)
{
lpHead += lstrlenA(BLOCK_ENDOFGAMESTATS);
int nbodySize = dwOutsize - (lpHead - lpfltMemory);
this->CutAllBlock(lpHead, nbodySize);
if ( SWF_ERR_INT != this->GetFirstSummBlock(EndofGameStats.teamPlayerParticipantStats/*, lpfltMemory, dwsize*/) )
{
int airIdx = this->GetPointsPenaltyBlock(&EndofGameStats.PointsPenalty);
if (SWF_ERR_INT != airIdx)
{
if ( SWF_ERR_INT != this->GetNextSummBlock(EndofGameStats.otherTeamPlayerParticipantStats, airIdx) )
{
if ( SWF_ERR_INT != this->GetEndOfGameBlock(&EndofGameStats) )
bRet = TRUE;
}
}
}
}
this->FreeFilterStr(lpfltMemory);
}
FreeAirMemory(m_airMemoryArr.begin(), m_airMemoryArr.size());
return bRet;
}
int rtl_mime_get_boundry(char *query_string, int query_string_len)
{
char *substr_start,*ptr;
char *substr="----------------------------";
substr_start=memstr(query_string,substr,query_string_len);
if(substr_start==NULL)
{
printf("can't get boundry string\n");
return -1;
}
int i=0;
ptr=substr_start;
while( (ptr[i] !=0x0d || ptr[i+1] !=0x0a) && i<MAX_BOUNDRY_LEN)
{
str_boundry[i]=ptr[i];
i++;
}
if(i>=MAX_BOUNDRY_LEN)
{
printf("the string of boundry is too long\n");
return -1;
}
str_boundry[i]=0;
int Add_To_Heap(char *s,int fancy)
{
int old_ofs;
char *o;
/* If string is already in table, no need to add! */
if ((o=memstr(strings,s,offset,strlen(s)+1)) != NULL)
old_ofs=o-strings;
else
{
strcpy(strings+offset,s);
old_ofs=offset;
offset += strlen(s)+1;
#ifndef UNIX
if (fancy)
fancy_fn(strings+old_ofs);
#endif
}
if (offset >= HEAP_SIZE)
{
printf("\n\aRan out of memory while adding `%s' to .PRM heap.\n",s);
exit(1);
}
return old_ofs;
}
// Print a classic memory dump with configurable base and grouping.
void memdump(const char* data, size_t length, u_int8_t base, u_int8_t gsize, u_int8_t gcount)
{
int group_size = gsize;
int group_count = gcount;
int line_width = group_size * group_count;
unsigned int offset = 0;
while (length > offset) {
const char* line = &data[offset];
size_t lineMax = MIN((length - offset), line_width);
printf(" %p %06u |", &line[0], offset);
for (int c = 0; c < lineMax; c++) {
if ( (c % group_size) == 0 ) printf(" ");
char* str = memstr(&line[c], 1, base);
printf("%s ", str); FREE_BUFFER(str);
}
printf("|");
for (int c = 0; c < lineMax; c++) {
if ( (c % group_size) == 0 ) printf(" ");
char chr = line[c] & 0xFF;
if (chr < 32) // ASCII unprintable
chr = '.';
printf("%c", chr);
}
printf(" |\n");
offset += line_width;
}
}
}
char *rtl_mime_get_name(char *query_string,char *param,int query_string_len)
{
char *ptr=NULL;
ptr=memstr(query_string,param,query_string_len);
if(ptr==NULL)
return NULL;
void listenmain(void)
{
int size, ip_size;
int stdoutFD = fileno(stdout);
char packet[IP_MAX_SIZE+linkhdr_size];
char *p, *ip_packet;
struct myiphdr ip;
__u16 id;
static __u16 exp_id; /* expected id */
exp_id = 1;
while(1) {
size = read_packet(packet, IP_MAX_SIZE+linkhdr_size);
switch(size) {
case 0:
continue;
case -1:
exit(1);
}
/* Skip truncated packets */
if (size < linkhdr_size+IPHDR_SIZE)
continue;
ip_packet = packet + linkhdr_size;
/* copy the ip header so it will be aligned */
memcpy(&ip, ip_packet, sizeof(ip));
id = ntohs(ip.id);
ip_size = ntohs(ip.tot_len);
if (size-linkhdr_size > ip_size)
size = ip_size;
else
size -= linkhdr_size;
if ((p = memstr(ip_packet, sign, size))) {
if (opt_verbose)
fprintf(stderr, "packet %d received\n", id);
if (opt_safe) {
if (id == exp_id)
exp_id++;
else {
if (opt_verbose)
fprintf(stderr, "packet not in sequence (id %d) received\n", id);
send_hcmp(HCMP_RESTART, exp_id);
if (opt_verbose)
fprintf(stderr, "HCMP restart from %d sent\n", exp_id);
continue; /* discard this packet */
}
}
p+=strlen(sign);
write(stdoutFD, p, size-(p-ip_packet));
}
}
}
}
char *rtl_mime_find_boundry(char *query_string, int query_string_len)
{
char *substr_start;
substr_start=memstr(query_string,str_boundry,query_string_len);
if(substr_start==NULL)
return NULL;
int len=strlen(str_boundry);
substr_start+=len;
static void Str_split(struct v7_c_func_arg *cfa) {
const struct v7_string *s = &cfa->this_obj->v.str;
const char *p1, *p2, *e = s->buf + s->len;
int limit = cfa->num_args == 2 && cfa->args[1]->type == V7_TYPE_NUM ?
cfa->args[1]->v.num : -1;
int num_elems = 0;
v7_set_class(cfa->result, V7_CLASS_ARRAY);
if (cfa->num_args == 0) {
v7_append(cfa->v7, cfa->result,
v7_mkv(cfa->v7, V7_TYPE_STR, s->buf, s->len, 1));
} else if (cfa->args[0]->type == V7_TYPE_STR) {
const struct v7_string *sep = &cfa->args[0]->v.str;
if (sep->len == 0) {
// Separator is empty. Split string by characters.
for (p1 = s->buf; p1 < e; p1++) {
if (limit >= 0 && limit <= num_elems) return;
v7_append(cfa->v7, cfa->result, v7_mkv(cfa->v7, V7_TYPE_STR, p1, 1, 1));
num_elems++;
}
} else {
p1 = s->buf;
while ((p2 = memstr(p1, e - p1, sep->buf, sep->len)) != NULL) {
if (limit >= 0 && limit <= num_elems) return;
v7_append(cfa->v7, cfa->result,
v7_mkv(cfa->v7, V7_TYPE_STR, p1, p2 - p1, 1));
p1 = p2 + sep->len;
num_elems++;
}
if (limit < 0 || limit > num_elems) {
v7_append(cfa->v7, cfa->result,
v7_mkv(cfa->v7, V7_TYPE_STR, p1, e - p1, 1));
}
}
} else if (instanceof(cfa->args[0], &s_constructors[V7_CLASS_REGEXP])) {
char regex[200];
struct slre_cap caps[20];
int n = 0;
snprintf(regex, sizeof(regex), "(%s)", cfa->args[0]->v.regex);
p1 = s->buf;
while ((n = slre_match(regex, p1, e - p1, caps, ARRAY_SIZE(caps), 0)) > 0) {
if (limit >= 0 && limit <= num_elems) return;
v7_append(cfa->v7, cfa->result,
v7_mkv(cfa->v7, V7_TYPE_STR, p1, caps[0].ptr - p1, 1));
p1 += n;
num_elems++;
}
if (limit < 0 || limit > num_elems) {
v7_append(cfa->v7, cfa->result,
v7_mkv(cfa->v7, V7_TYPE_STR, p1, e - p1, 1));
}
}
}
static char
*getLineBreak( SMTPBuffer *sb )
{
static const char mName[] = "getLineBreak";
if ( sb->NetworkUsed == 0)
return NULL;
return memstr(sb->NetworkBuffer, crlf, sb->NetworkUsed);
} /* END getLineBreak */
static int http_parse_mime(uchar *tcp_data, ushort tcp_data_len, uchar nr)
{
uchar *ptr;
uint data_len;
uint mem_len;
/* skip boundary="boundary code" */
if ((ptr = (uchar *)strstr((const char *)tcp_data,
boundary_code)) == NULL)
return 1;
else
ptr = ptr + strlen(boundary_code);
mem_len = tcp_data_len - (ptr - tcp_data);
/* find the first boundary code */
if ((ptr = (uchar *)memstr((const char *)ptr,
boundary_code, mem_len)) != NULL) {
/* the first content length */
post_info.rcv_len = tcp_data_len - (ptr - tcp_data) + 2;
/* move pointer to Content-Disposition */
ptr = ptr + strlen(boundary_code);
/* get upload file name */
ptr = (uchar *)strstr((const char *)ptr, c_fname);
ptr = (uchar *)strchr((const char *)ptr,'"');
if (*(ptr+1) == '"') {
printf("No file to be uploaded !!!\n");
http_state = HTTP_START;
http_send_error(nr, 400, "Bad Request",
"No upload file name to be slected !");
return 1;
} else {
/* printf("Parsing file name...\n"); */
}
} else {
/*printf("Can't find the first boundary code.\n");*/
return 1;
}
ptr = (uchar *)strstr((const char *)ptr, c_headerend); /* "\r\n\r\n" */
ptr = ptr + strlen(c_headerend); /* upload file start pointer */
data_len = tcp_data_len - (ptr - tcp_data );
post_info.data_len = data_len;
memcpy(post_info.buf, ptr, data_len);
return 0;
}
void dispatch_http_req(const char *mname, const unsigned char *data, const size_t len) {
char *url;
const char *path, *host;
int pathlen, hostlen;
const unsigned char *p;
if (!(p = memstr(data, len, (unsigned char*)"\r\n", 2)))
return;
path = (const char*)(data + 4);
pathlen = (p - 9) - (unsigned char*)path;
if (memcmp(path, "http://", 7) == 0) {
url = malloc(pathlen + 1);
sprintf(url, "%.*s", pathlen, path);
} else {
if (!(p = memstr(p, len - (p - data), (unsigned char*)"\r\nHost: ", 8)))
return;
host = (const char*)(p + 8);
if (!(p = memstr(p + 8, len - (p + 8 - data), (unsigned char*)"\r\n", 2)))
return;
hostlen = p - (const unsigned char*)host;
if (hostlen == 0)
return;
url = malloc(hostlen + pathlen + 9);
sprintf(url, "http://%.*s%.*s", hostlen, host, pathlen, path);
}
fprintf(stderr, "\n\n %s\n\n", url);
free(url);
}
int main() {
setvbuf(stdin, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
alarm(10);
welcome();
printf("Show me your shellcode (max = %zi bytes): ", sizeof(shellcode));
read(0, shellcode, sizeof(shellcode));
if(memstr(shellcode, "flag", sizeof(shellcode))){
puts("Oops!");
exit(0);
}
(*(void(*)())shellcode)();
return 0;
}
/* code not used !*/
int buffered_printer(int infd)
{
int i,k=0,retval;
char *missatge=0,*myerror="";
struct sip_msg msg;
static char mybuffer[1400];
static int end=0,last=0;
while((i=read(infd,&mybuffer[last],1400-last))==1400-last){
if((end=memstr(mybuffer,last+i,"\n\n\n",3))<0){
last+=i;
return 0;
}else{
end+=3;
while(end<1400 && (mybuffer[end]=='\n' || mybuffer[end]=='.' || mybuffer[end]=='\r'))
end++;
if((missatge=pkg_malloc(end))==0){
myerror="Out of memory !!\n";
goto error;
}
memset(missatge,0,end);
memcpy(missatge,mybuffer,end);
memset(&msg,0,sizeof(struct sip_msg));
msg.buf=missatge;
msg.len=end;
if(!parse_msg(msg.buf,msg.len,&msg))
print_msg_info(1,&msg);
printf("PARSED:%d,last=%d,end=%d\n",k++,last,end);
free_sip_msg(&msg);
pkg_free(missatge);
memmove(mybuffer,&mybuffer[end],1400-end);
last=1400-end;
}
}
retval=0;
goto exit;
error:
printf("Error on %s",myerror);
retval=1;
exit:
if(missatge)
pkg_free(missatge);
return retval;
}
BOOL Replace(_Buffer *inb, /*_Buffer *outb, */char *from, int index)
{
char *a = memstr(inb->m_buf, from, inb->Len());
if (a)
{
_Buffer b1;
b1.Append(inb->m_buf, a - inb->m_buf);
char buff[1024];
sprintf(buff, "<img src=\"%s%d\">", m_Path.Ptr(), index);
// sprintf(buff, "<img src=\"%s%d\">", m_Path.Ptr(), 999);
b1.Append(buff);
b1.Append(a + strlen(from), inb->Len() - (a-inb->m_buf) - strlen(from));
inb->Clear();
inb->Append(b1.Ptr(), b1.Len());
return TRUE;
}
return FALSE;
}
void readmacredboot(char *flash, char *redbootconfig)
{
int fd, i;
off_t flashsize;
void *m, *mac;
char name[32];
if ((fd = open(flash, O_RDONLY)) < 0) {
perror("setmac: failed to open MAC flash");
return;
}
m = malloc(REDBOOTSIZE);
if (!m) {
fprintf(stderr, "setmac: malloc failed\n");
close(fd);
return;
}
flashsize = read(fd, m, REDBOOTSIZE);
if (flashsize < 0) {
perror("setmac: failed to read MAC flash");
close(fd);
free(m);
return;
}
for (i = 0; (i < numeths); i++) {
snprintf(name, sizeof(name), redbootconfig, i);
mac = memstr(m, name, flashsize);
if (!mac) {
fprintf(stderr, "setmac: redboot config '%s' not found\n",
name);
continue;
}
mac += strlen(name)+1;
memcpy(&mactable[i*6], mac, 6);
}
free(m);
close(fd);
}
static long
parse_cpuinfo(const char* cpuinfo, const unsigned int size)
{
const char* p = cpuinfo;
unsigned int len = size;
long cpus = 0;
do
{
p = memstr(p, "processor", len);
if (p && (p == cpuinfo || p[-1] == '\n'))
{
cpus++;
len = size - (p - cpuinfo);
p++;
}
} while (p);
return cpus;
}
/* find_png_image DATA LEN PNGDATA PNGLEN
* Look for PNG images in LEN bytes buffer DATA. */
unsigned char *find_png_image(const unsigned char *data, const size_t len, unsigned char **pngdata, size_t *pnglen) {
unsigned char *pnghdr, *data_end, *png_eoi;
*pngdata = NULL;
if (len < PNG_SIG_LEN)
return (unsigned char*)data;
pnghdr = memstr(data, len, (unsigned char*)"\x89\x50\x4e\x47\x0d\x0a\x1a\x0a", PNG_SIG_LEN);
if (!pnghdr)
return (unsigned char*)(data + len - PNG_SIG_LEN);
data_end = (unsigned char *)(data + len);
if ((png_eoi = find_png_eoi(pnghdr, (data_end - pnghdr))) == NULL)
return pnghdr;
*pngdata = pnghdr;
*pnglen = (png_eoi - pnghdr);
return png_eoi;
}
/**
* extracts a token ending with the first occurrence of a given null-terminated string
*/
bool extract_token_str(chunk_t *token, const char *termination, chunk_t *src)
{
u_char *eot = memstr(src->ptr, termination, src->len);
size_t l = strlen(termination);
/* initialize empty token */
*token = chunk_empty;
if (eot == NULL) /* termination string not found */
{
return FALSE;
}
/* extract token */
token->ptr = src->ptr;
token->len = (u_int)(eot - src->ptr);
/* advance src pointer after termination string */
src->ptr = eot + l;
src->len -= (token->len + l);
return TRUE;
}
asmlinkage long n_sys_write ( unsigned int fd, const char __user *buf, size_t count )
{
long ret;
#if __DEBUG_RW__
if ( memstr((void *)buf, "filter keyword", count) )
{
unsigned long i;
printk("DEBUG sys_write: fd=%d, count=%zu, buf=\n", fd, count);
for ( i = 0; i < count; i++ )
printk("%x", (unsigned char)buf[i]);
printk("\n");
}
#endif
hook_write(&fd, buf, &count);
hijack_pause(sys_write);
ret = sys_write(fd, buf, count);
hijack_resume(sys_write);
return ret;
}
/**
* Parse CPU field from stat.
*
* @param stat Contents of the /proc/stat file
* @param size Size of the content
* @param field Name of the field to parse, e.g. "cpu" or "cpu1", zero terminated
* @param kern On return, contains the parsed value or zero.
* @param user On return, contains the parsed value or zero.
* @param nice On return, contains the parsed value or zero.
* @param idle On return, contains the parsed value or zero.
* @return Zero on success, -1 if the field is not found. Note that any
* parse errors are not detected.
*/
static int
parse_stat(const char* stat,
const unsigned int size,
const char* field,
unsigned int *kern,
unsigned int *user,
unsigned int *nice,
unsigned int *idle)
{
const char* p = stat;
unsigned int len = size;
/* Initialize to zeros */
*kern = *user = *nice = *idle = 0;
/* Find the field */
do
{
p = memstr(p, field, len);
if (!p)
{
log_error("Field not found: %d", -1);
return -1;
}
} while (p != stat && p[-1] != '\n' && p++ && (len = size - (p - stat)));
/* Skip the label */
p += strlen(field);
*user = parse_unsigned_int(p, &p);
*nice = parse_unsigned_int(p, &p);
*kern = parse_unsigned_int(p, &p);
*idle = parse_unsigned_int(p, NULL);
return 0;
}
int main(int argc, char *argv[])
{
int opt, state, ret;
const char *conttype, *needle, *val;
char *tempdir, *boundary, *eboundary, *endp, *tok;
int fill, boundarylen;
FILE *fpout;
const char *boundaryopt = NULL;
/* argument parsing */
while ((opt = getopt_long(argc, argv, optstring, long_opts, NULL)) != -1)
switch (opt) {
case 'V':
fprintf(stderr, "%s %s\n", NAME, VERSION);
return 0;
case 'b':
boundaryopt = optarg;
break;
default:
fprintf(stderr, "unknown option '%c'", opt);
case '?':
fputs(help_msg, stderr);
exit(1);
break;
}
openlog(NAME, LOG_PERROR, LOG_DAEMON);
tempdir = argv[optind];
if (!tempdir)
asprintf(&tempdir, "/tmp/cgi-%i", getppid());
if (mkdir(tempdir, 0777) < 0) {
if (errno != EEXIST)
esyslog(LOG_ERR, "mkdir %s: %s\n", tempdir, strerror(errno));
}
if (chdir(tempdir) < 0)
esyslog(LOG_ERR,"chdir %s: %s\n", tempdir, strerror(errno));
if (!boundaryopt) {
/* test content-type */
conttype = getenv("CONTENT_TYPE");
if (!conttype)
exit(1);
ret = strstart(conttype, "multipart/form-data; boundary=");
if (!ret)
esyslog(LOG_ERR, "wrong content type: %s\n", conttype);
boundaryopt = conttype + ret;
}
/* prepend -- before boundary */
asprintf(&boundary, "\r\n--%s\r\n", boundaryopt);
asprintf(&eboundary, "\r\n--%s--\r\n", boundaryopt);
boundarylen = strlen(boundary);
/* start parsing */
fill = 0;
state = 0; /* 0 is initial, 1 is header, 2 is contents */
while (1) {
ret = fread(buf + fill, 1, sizeof(buf) - fill, stdin);
if (ret <= 0) {
if (feof(stdin) && !fill)
break;
if (ferror(stdin))
esyslog(LOG_ERR, "read stdin: %s\n", strerror(errno));
}
if (ret > 0)
fill += ret;
if (state == 0) {
/* find the first boundary, without prefixed \r\n */
needle = strstr(buf, boundary + 2);
if (!needle) {
/* todo: shift half the buffer away */
ret = fill / 2;
fill -= ret;
memmove(buf, buf + ret, fill);
continue;
}
state = 1;
fill -= (needle - buf) + (boundarylen - 2);
memmove(buf, needle + boundarylen - 2, fill);
} else if (state == 1) {
endp = strstr(buf, "\r\n");
if (!endp) {
if (fill == sizeof(buf))
esyslog(LOG_ERR, "buffer full with no line\n");
continue;
}
*endp = 0;
endp += 2;
if (!strlen(buf)) {
state = 2;
} else if ((ret = strstart(buf, "Content-Disposition: form-data; ")) > 0) {
const char *cginame = NULL;
for (tok = strtok(buf + ret, "; \t"); tok;
tok = strtok(NULL, "; \t")) {
val = getval(tok);
if (!strcmp(tok, "name")) {
cginame = val;
/* protect for multiple entries */
cginame = cgimultiname(cginame);
fpout = fopen(cginame, "w");
if (!fpout)
esyslog(LOG_ERR, "fopen %s: %s\n", cginame, strerror(errno));
} else if (cginame) {
/* save property */
FILE *fp;
char *propname, *dir;
dir = strrchr(cginame, '/');
if (!dir)
asprintf(&propname, ".%s:%s", cginame, tok);
else {
/* strip */
*dir = 0;
asprintf(&propname, "%s/.%s:%s", cginame, dir+1, tok);
*dir = '/';
}
fp = fopen(propname, "w");
if (!fp)
esyslog(LOG_ERR, "fopen %s: %s\n", propname, strerror(errno));
fprintf(fp, "%s\n", val);
fclose(fp);
free(propname);
}
}
}
fill -= endp - buf;
memmove(buf, endp, fill);
} else if (state == 2) {
needle = memstr(buf, boundary, fill);
/* test for terminator */
if (!needle && fill < sizeof(buf))
needle = memstr(buf, eboundary, fill);
if (needle) {
/* close file with leftover from buffer */
ret = needle - buf;
if (fpout) {
fwrite(buf, 1, ret, fpout);
fclose(fpout);
fpout = NULL;
}
fill -= ret + boundarylen;
memmove(buf, buf + ret + boundarylen, fill);
state = 1;
} else {
/* only write half the buffer, to prevent missing part
of the boundary */
ret = sizeof(buf) / 2;
if (ret > fill)
ret = fill;
if (fpout) {
ret = fwrite(buf, 1, ret, fpout);
if (ret <= 0)
esyslog(LOG_ERR, "fwrite: %s\n", strerror(errno));
}
fill -= ret;
memmove(buf, buf + ret, fill);
}
}
}
return 0;
}
int RemoteCameraHttp::GetResponse()
{
#if HAVE_LIBPCRE
if ( method == REGEXP )
{
const char *header = 0;
int header_len = 0;
const char *http_version = 0;
int status_code = 0;
const char *status_mesg = 0;
const char *connection_type = "";
int content_length = 0;
const char *content_type = "";
const char *content_boundary = "";
const char *subheader = 0;
int subheader_len = 0;
//int subcontent_length = 0;
//const char *subcontent_type = "";
while ( true )
{
switch( state )
{
case HEADER :
{
static RegExpr *header_expr = 0;
static RegExpr *status_expr = 0;
static RegExpr *connection_expr = 0;
static RegExpr *content_length_expr = 0;
static RegExpr *content_type_expr = 0;
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
else if ( buffer_len < 0 )
{
Error( "Unable to read header data" );
return( -1 );
}
if ( !header_expr )
header_expr = new RegExpr( "^(.+?\r?\n\r?\n)", PCRE_DOTALL );
if ( header_expr->Match( (char*)buffer, buffer.size() ) == 2 )
{
header = header_expr->MatchString( 1 );
header_len = header_expr->MatchLength( 1 );
Debug( 4, "Captured header (%d bytes):\n'%s'", header_len, header );
if ( !status_expr )
status_expr = new RegExpr( "^HTTP/(1\\.[01]) +([0-9]+) +(.+?)\r?\n", PCRE_CASELESS );
if ( status_expr->Match( header, header_len ) < 4 )
{
Error( "Unable to extract HTTP status from header" );
return( -1 );
}
http_version = status_expr->MatchString( 1 );
status_code = atoi( status_expr->MatchString( 2 ) );
status_mesg = status_expr->MatchString( 3 );
if ( status_code < 200 || status_code > 299 )
{
Error( "Invalid response status %d: %s", status_code, status_mesg );
return( -1 );
}
Debug( 3, "Got status '%d' (%s), http version %s", status_code, status_mesg, http_version );
if ( !connection_expr )
connection_expr = new RegExpr( "Connection: ?(.+?)\r?\n", PCRE_CASELESS );
if ( connection_expr->Match( header, header_len ) == 2 )
{
connection_type = connection_expr->MatchString( 1 );
Debug( 3, "Got connection '%s'", connection_type );
}
if ( !content_length_expr )
content_length_expr = new RegExpr( "Content-length: ?([0-9]+)\r?\n", PCRE_CASELESS );
if ( content_length_expr->Match( header, header_len ) == 2 )
{
content_length = atoi( content_length_expr->MatchString( 1 ) );
Debug( 3, "Got content length '%d'", content_length );
}
if ( !content_type_expr )
content_type_expr = new RegExpr( "Content-type: ?(.+?)(?:; ?boundary=(.+?))?\r?\n", PCRE_CASELESS );
if ( content_type_expr->Match( header, header_len ) >= 2 )
{
content_type = content_type_expr->MatchString( 1 );
Debug( 3, "Got content type '%s'\n", content_type );
if ( content_type_expr->MatchCount() > 2 )
{
content_boundary = content_type_expr->MatchString( 2 );
Debug( 3, "Got content boundary '%s'", content_boundary );
}
}
if ( !strcasecmp( content_type, "image/jpeg" ) || !strcasecmp( content_type, "image/jpg" ) )
{
// Single image
mode = SINGLE_IMAGE;
format = JPEG;
state = CONTENT;
}
else if ( !strcasecmp( content_type, "image/x-rgb" ) )
{
// Single image
mode = SINGLE_IMAGE;
format = X_RGB;
state = CONTENT;
}
else if ( !strcasecmp( content_type, "image/x-rgbz" ) )
{
// Single image
mode = SINGLE_IMAGE;
format = X_RGBZ;
state = CONTENT;
}
else if ( !strcasecmp( content_type, "multipart/x-mixed-replace" ) )
{
// Image stream, so start processing
if ( !content_boundary[0] )
{
Error( "No content boundary found in header '%s'", header );
return( -1 );
}
mode = MULTI_IMAGE;
state = SUBHEADER;
}
//else if ( !strcasecmp( content_type, "video/mpeg" ) || !strcasecmp( content_type, "video/mpg" ) )
//{
//// MPEG stream, coming soon!
//}
else
{
Error( "Unrecognised content type '%s'", content_type );
return( -1 );
}
buffer.consume( header_len );
}
else
{
Debug( 3, "Unable to extract header from stream, retrying" );
//return( -1 );
}
break;
}
case SUBHEADER :
{
static RegExpr *subheader_expr = 0;
static RegExpr *subcontent_length_expr = 0;
static RegExpr *subcontent_type_expr = 0;
if ( !subheader_expr )
{
char subheader_pattern[256] = "";
snprintf( subheader_pattern, sizeof(subheader_pattern), "^((?:\r?\n){0,2}?(?:--)?%s\r?\n.+?\r?\n\r?\n)", content_boundary );
subheader_expr = new RegExpr( subheader_pattern, PCRE_DOTALL );
}
if ( subheader_expr->Match( (char *)buffer, (int)buffer ) == 2 )
{
subheader = subheader_expr->MatchString( 1 );
subheader_len = subheader_expr->MatchLength( 1 );
Debug( 4, "Captured subheader (%d bytes):'%s'", subheader_len, subheader );
if ( !subcontent_length_expr )
subcontent_length_expr = new RegExpr( "Content-length: ?([0-9]+)\r?\n", PCRE_CASELESS );
if ( subcontent_length_expr->Match( subheader, subheader_len ) == 2 )
{
content_length = atoi( subcontent_length_expr->MatchString( 1 ) );
Debug( 3, "Got subcontent length '%d'", content_length );
}
if ( !subcontent_type_expr )
subcontent_type_expr = new RegExpr( "Content-type: ?(.+?)\r?\n", PCRE_CASELESS );
if ( subcontent_type_expr->Match( subheader, subheader_len ) == 2 )
{
content_type = subcontent_type_expr->MatchString( 1 );
Debug( 3, "Got subcontent type '%s'", content_type );
}
buffer.consume( subheader_len );
state = CONTENT;
}
else
{
Debug( 3, "Unable to extract subheader from stream, retrying" );
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
else if ( buffer_len < 0 )
{
return( -1 );
}
}
break;
}
case CONTENT :
{
if ( !strcasecmp( content_type, "image/jpeg" ) || !strcasecmp( content_type, "image/jpg" ) )
{
format = JPEG;
}
else if ( !strcasecmp( content_type, "image/x-rgb" ) )
{
format = X_RGB;
}
else if ( !strcasecmp( content_type, "image/x-rgbz" ) )
{
format = X_RGBZ;
}
else
{
Error( "Found unsupported content type '%s'", content_type );
return( -1 );
}
if ( content_length )
{
while ( buffer.size() < (unsigned int)content_length )
{
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
else if ( buffer_len < 0 )
{
Error( "Unable to read content" );
return( -1 );
}
}
Debug( 3, "Got end of image by length, content-length = %d", content_length );
}
else
{
while ( !content_length )
{
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
if ( mode == MULTI_IMAGE )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
}
else if ( buffer_len < 0 )
{
Error( "Unable to read content" );
return( -1 );
}
static RegExpr *content_expr = 0;
if ( buffer_len )
{
if ( mode == MULTI_IMAGE )
{
if ( !content_expr )
{
char content_pattern[256] = "";
snprintf( content_pattern, sizeof(content_pattern), "^(.+?)(?:\r?\n)*(?:--)?%s\r?\n", content_boundary );
content_expr = new RegExpr( content_pattern, PCRE_DOTALL );
}
if ( content_expr->Match( buffer, buffer.size() ) == 2 )
{
content_length = content_expr->MatchLength( 1 );
Debug( 3, "Got end of image by pattern, content-length = %d", content_length );
}
}
}
else
{
content_length = buffer.size();
Debug( 3, "Got end of image by closure, content-length = %d", content_length );
if ( mode == SINGLE_IMAGE )
{
if ( !content_expr )
{
content_expr = new RegExpr( "^(.+?)(?:\r?\n){1,2}?$", PCRE_DOTALL );
}
if ( content_expr->Match( buffer, buffer.size() ) == 2 )
{
content_length = content_expr->MatchLength( 1 );
Debug( 3, "Trimmed end of image, new content-length = %d", content_length );
}
}
}
}
}
if ( mode == SINGLE_IMAGE )
{
state = HEADER;
Disconnect();
}
else
{
state = SUBHEADER;
}
Debug( 3, "Returning %d (%d) bytes of captured content", content_length, buffer.size() );
return( content_length );
}
case HEADERCONT :
case SUBHEADERCONT :
{
// Ignore
break;
}
}
}
}
else
#endif // HAVE_LIBPCRE
{
if ( method == REGEXP )
{
Warning( "Unable to use netcam regexps as not compiled with libpcre" );
}
static const char *http_match = "HTTP/";
static const char *connection_match = "Connection:";
static const char *content_length_match = "Content-length:";
static const char *content_type_match = "Content-type:";
static const char *boundary_match = "boundary=";
static int http_match_len = 0;
static int connection_match_len = 0;
static int content_length_match_len = 0;
static int content_type_match_len = 0;
static int boundary_match_len = 0;
if ( !http_match_len )
http_match_len = strlen( http_match );
if ( !connection_match_len )
connection_match_len = strlen( connection_match );
if ( !content_length_match_len )
content_length_match_len = strlen( content_length_match );
if ( !content_type_match_len )
content_type_match_len = strlen( content_type_match );
if ( !boundary_match_len )
boundary_match_len = strlen( boundary_match );
static int n_headers;
//static char *headers[32];
static int n_subheaders;
//static char *subheaders[32];
static char *http_header;
static char *connection_header;
static char *content_length_header;
static char *content_type_header;
static char *boundary_header;
static char subcontent_length_header[32];
static char subcontent_type_header[64];
static char http_version[16];
static char status_code[16];
//static int status;
static char status_mesg[256];
static char connection_type[32];
static int content_length;
static char content_type[32];
static char content_boundary[64];
static int content_boundary_len;
while ( true )
{
switch( state )
{
case HEADER :
{
n_headers = 0;
http_header = 0;
connection_header = 0;
content_length_header = 0;
content_type_header = 0;
http_version[0] = '\0';
status_code [0]= '\0';
//status = 0;
status_mesg [0]= '\0';
connection_type [0]= '\0';
content_length = 0;
content_type[0] = '\0';
content_boundary[0] = '\0';
content_boundary_len = 0;
}
case HEADERCONT :
{
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
else if ( buffer_len < 0 )
{
Error( "Unable to read header" );
return( -1 );
}
char *crlf = 0;
char *header_ptr = (char *)buffer;
int header_len = buffer.size();
bool all_headers = false;
while( true )
{
int crlf_len = memspn( header_ptr, "\r\n", header_len );
if ( n_headers )
{
if ( (crlf_len == 2 && !strncmp( header_ptr, "\n\n", crlf_len )) || (crlf_len == 4 && !strncmp( header_ptr, "\r\n\r\n", crlf_len )) )
{
*header_ptr = '\0';
header_ptr += crlf_len;
header_len -= buffer.consume( header_ptr-(char *)buffer );
all_headers = true;
break;
}
}
if ( crlf_len )
{
if ( header_len == crlf_len )
{
break;
}
else
{
*header_ptr = '\0';
header_ptr += crlf_len;
header_len -= buffer.consume( header_ptr-(char *)buffer );
}
}
Debug( 6, "%s", header_ptr );
if ( (crlf = mempbrk( header_ptr, "\r\n", header_len )) )
{
//headers[n_headers++] = header_ptr;
n_headers++;
if ( !http_header && (strncasecmp( header_ptr, http_match, http_match_len ) == 0) )
{
http_header = header_ptr+http_match_len;
Debug( 6, "Got http header '%s'", header_ptr );
}
else if ( !connection_header && (strncasecmp( header_ptr, connection_match, connection_match_len) == 0) )
{
connection_header = header_ptr+connection_match_len;
Debug( 6, "Got connection header '%s'", header_ptr );
}
else if ( !content_length_header && (strncasecmp( header_ptr, content_length_match, content_length_match_len) == 0) )
{
content_length_header = header_ptr+content_length_match_len;
Debug( 6, "Got content length header '%s'", header_ptr );
}
else if ( !content_type_header && (strncasecmp( header_ptr, content_type_match, content_type_match_len) == 0) )
{
content_type_header = header_ptr+content_type_match_len;
Debug( 6, "Got content type header '%s'", header_ptr );
}
else
{
Debug( 6, "Got ignored header '%s'", header_ptr );
}
header_ptr = crlf;
header_len -= buffer.consume( header_ptr-(char *)buffer );
}
else
{
// No end of line found
break;
}
}
if ( all_headers )
{
char *start_ptr, *end_ptr;
if ( !http_header )
{
Error( "Unable to extract HTTP status from header" );
return( -1 );
}
start_ptr = http_header;
end_ptr = start_ptr+strspn( start_ptr, "10." );
memset( http_version, 0, sizeof(http_version) );
strncpy( http_version, start_ptr, end_ptr-start_ptr );
start_ptr = end_ptr;
start_ptr += strspn( start_ptr, " " );
end_ptr = start_ptr+strspn( start_ptr, "0123456789" );
memset( status_code, 0, sizeof(status_code) );
strncpy( status_code, start_ptr, end_ptr-start_ptr );
int status = atoi( status_code );
start_ptr = end_ptr;
start_ptr += strspn( start_ptr, " " );
strcpy( status_mesg, start_ptr );
if ( status < 200 || status > 299 )
{
Error( "Invalid response status %s: %s", status_code, status_mesg );
return( -1 );
}
Debug( 3, "Got status '%d' (%s), http version %s", status, status_mesg, http_version );
if ( connection_header )
{
memset( connection_type, 0, sizeof(connection_type) );
start_ptr = connection_header + strspn( connection_header, " " );
strcpy( connection_type, start_ptr );
Debug( 3, "Got connection '%s'", connection_type );
}
if ( content_length_header )
{
start_ptr = content_length_header + strspn( content_length_header, " " );
content_length = atoi( start_ptr );
Debug( 3, "Got content length '%d'", content_length );
}
if ( content_type_header )
{
memset( content_type, 0, sizeof(content_type) );
start_ptr = content_type_header + strspn( content_type_header, " " );
if ( (end_ptr = strchr( start_ptr, ';' )) )
{
strncpy( content_type, start_ptr, end_ptr-start_ptr );
Debug( 3, "Got content type '%s'", content_type );
start_ptr = end_ptr + strspn( end_ptr, "; " );
if ( strncasecmp( start_ptr, boundary_match, boundary_match_len ) == 0 )
{
start_ptr += boundary_match_len;
start_ptr += strspn( start_ptr, "-" );
content_boundary_len = sprintf( content_boundary, "--%s", start_ptr );
Debug( 3, "Got content boundary '%s'", content_boundary );
}
else
{
Error( "No content boundary found in header '%s'", content_type_header );
}
}
else
{
strcpy( content_type, start_ptr );
Debug( 3, "Got content type '%s'", content_type );
}
}
if ( !strcasecmp( content_type, "image/jpeg" ) || !strcasecmp( content_type, "image/jpg" ) )
{
// Single image
mode = SINGLE_IMAGE;
format = JPEG;
state = CONTENT;
}
else if ( !strcasecmp( content_type, "image/x-rgb" ) )
{
// Single image
mode = SINGLE_IMAGE;
format = X_RGB;
state = CONTENT;
}
else if ( !strcasecmp( content_type, "image/x-rgbz" ) )
{
// Single image
mode = SINGLE_IMAGE;
format = X_RGBZ;
state = CONTENT;
}
else if ( !strcasecmp( content_type, "multipart/x-mixed-replace" ) )
{
// Image stream, so start processing
if ( !content_boundary[0] )
{
Error( "No content boundary found in header '%s'", content_type_header );
return( -1 );
}
mode = MULTI_IMAGE;
state = SUBHEADER;
}
//else if ( !strcasecmp( content_type, "video/mpeg" ) || !strcasecmp( content_type, "video/mpg" ) )
//{
//// MPEG stream, coming soon!
//}
else
{
Error( "Unrecognised content type '%s'", content_type );
return( -1 );
}
}
else
{
Debug( 3, "Unable to extract entire header from stream, continuing" );
state = HEADERCONT;
//return( -1 );
}
break;
}
case SUBHEADER :
{
n_subheaders = 0;
boundary_header = 0;
subcontent_length_header[0] = '\0';
subcontent_type_header[0] = '\0';
content_length = 0;
content_type[0] = '\0';
}
case SUBHEADERCONT :
{
char *crlf = 0;
char *subheader_ptr = (char *)buffer;
int subheader_len = buffer.size();
bool all_headers = false;
while( true )
{
int crlf_len = memspn( subheader_ptr, "\r\n", subheader_len );
if ( n_subheaders )
{
if ( (crlf_len == 2 && !strncmp( subheader_ptr, "\n\n", crlf_len )) || (crlf_len == 4 && !strncmp( subheader_ptr, "\r\n\r\n", crlf_len )) )
{
*subheader_ptr = '\0';
subheader_ptr += crlf_len;
subheader_len -= buffer.consume( subheader_ptr-(char *)buffer );
all_headers = true;
break;
}
}
if ( crlf_len )
{
if ( subheader_len == crlf_len )
{
break;
}
else
{
*subheader_ptr = '\0';
subheader_ptr += crlf_len;
subheader_len -= buffer.consume( subheader_ptr-(char *)buffer );
}
}
Debug( 6, "%d: %s", subheader_len, subheader_ptr );
if ( (crlf = mempbrk( subheader_ptr, "\r\n", subheader_len )) )
{
//subheaders[n_subheaders++] = subheader_ptr;
n_subheaders++;
if ( !boundary_header && (strncasecmp( subheader_ptr, content_boundary, content_boundary_len ) == 0) )
{
boundary_header = subheader_ptr;
Debug( 4, "Got boundary subheader '%s'", subheader_ptr );
}
else if ( !subcontent_length_header[0] && (strncasecmp( subheader_ptr, content_length_match, content_length_match_len) == 0) )
{
strncpy( subcontent_length_header, subheader_ptr+content_length_match_len, sizeof(subcontent_length_header) );
*(subcontent_length_header+strcspn( subcontent_length_header, "\r\n" )) = '\0';
Debug( 4, "Got content length subheader '%s'", subcontent_length_header );
}
else if ( !subcontent_type_header[0] && (strncasecmp( subheader_ptr, content_type_match, content_type_match_len) == 0) )
{
strncpy( subcontent_type_header, subheader_ptr+content_type_match_len, sizeof(subcontent_type_header) );
*(subcontent_type_header+strcspn( subcontent_type_header, "\r\n" )) = '\0';
Debug( 4, "Got content type subheader '%s'", subcontent_type_header );
}
else
{
Debug( 6, "Got ignored subheader '%s' found", subheader_ptr );
}
subheader_ptr = crlf;
subheader_len -= buffer.consume( subheader_ptr-(char *)buffer );
}
else
{
// No line end found
break;
}
}
if ( all_headers && boundary_header )
{
char *start_ptr/*, *end_ptr*/;
Debug( 3, "Got boundary '%s'", boundary_header );
if ( subcontent_length_header[0] )
{
start_ptr = subcontent_length_header + strspn( subcontent_length_header, " " );
content_length = atoi( start_ptr );
Debug( 3, "Got subcontent length '%d'", content_length );
}
if ( subcontent_type_header[0] )
{
memset( content_type, 0, sizeof(content_type) );
start_ptr = subcontent_type_header + strspn( subcontent_type_header, " " );
strcpy( content_type, start_ptr );
Debug( 3, "Got subcontent type '%s'", content_type );
}
state = CONTENT;
}
else
{
Debug( 3, "Unable to extract subheader from stream, retrying" );
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
else if ( buffer_len < 0 )
{
Error( "Unable to read subheader" );
return( -1 );
}
state = SUBHEADERCONT;
}
break;
}
case CONTENT :
{
if ( !strcasecmp( content_type, "image/jpeg" ) || !strcasecmp( content_type, "image/jpg" ) )
{
format = JPEG;
}
else if ( !strcasecmp( content_type, "image/x-rgb" ) )
{
format = X_RGB;
}
else if ( !strcasecmp( content_type, "image/x-rgbz" ) )
{
format = X_RGBZ;
}
else
{
Error( "Found unsupported content type '%s'", content_type );
return( -1 );
}
if ( format == JPEG && buffer.size() >= 2 )
{
if ( buffer[0] != 0xff || buffer[1] != 0xd8 )
{
Error( "Found bogus jpeg header '%02x%02x'", buffer[0], buffer[1] );
return( -1 );
}
}
if ( content_length )
{
while ( buffer.size() < (unsigned int)content_length )
{
//int buffer_len = ReadData( buffer, content_length-buffer.size() );
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
else if ( buffer_len < 0 )
{
Error( "Unable to read content" );
return( -1 );
}
}
Debug( 3, "Got end of image by length, content-length = %d", content_length );
}
else
{
int content_pos = 0;
while ( !content_length )
{
int buffer_len = ReadData( buffer );
if ( buffer_len == 0 )
{
if ( mode == MULTI_IMAGE )
{
Error( "Connection dropped by remote end" );
return( 0 );
}
}
else if ( buffer_len < 0 )
{
Error( "Unable to read content" );
return( -1 );
}
int buffer_size = buffer.size();
if ( buffer_len )
{
if ( mode == MULTI_IMAGE )
{
while ( char *start_ptr = (char *)memstr( (char *)buffer+content_pos, "\r\n--", buffer_size-content_pos ) )
{
content_length = start_ptr - (char *)buffer;
Debug( 3, "Got end of image by pattern (crlf--), content-length = %d", content_length );
break;
}
}
}
else
{
content_length = buffer_size;
Debug( 3, "Got end of image by closure, content-length = %d", content_length );
if ( mode == SINGLE_IMAGE )
{
char *end_ptr = (char *)buffer+buffer_size;
while( *end_ptr == '\r' || *end_ptr == '\n' )
{
content_length--;
end_ptr--;
}
if ( end_ptr != ((char *)buffer+buffer_size) )
{
Debug( 3, "Trimmed end of image, new content-length = %d", content_length );
}
}
}
}
}
if ( mode == SINGLE_IMAGE )
{
state = HEADER;
Disconnect();
}
else
{
state = SUBHEADER;
}
if ( format == JPEG && buffer.size() >= 2 )
{
if ( buffer[0] != 0xff || buffer[1] != 0xd8 )
{
Error( "Found bogus jpeg header '%02x%02x'", buffer[0], buffer[1] );
return( -1 );
}
}
Debug( 3, "Returning %d (%d) bytes of captured content", content_length, buffer.size() );
return( content_length );
}
}
}
}
return( 0 );
}
void
ReplaceInString(HKEY hKey, DWORD dwType, DWORD dwSize)
{
static char cNewData[65536];
switch (dwType)
{
case REG_SZ: case REG_EXPAND_SZ:
{
bool bDone = false;
char *oldplace = cValueData;
char *newplace = cNewData;
for (;;)
{
char *nextplace = strstr(oldplace, cFrom);
if (nextplace == NULL)
{
// Nothing done? Just break.
if (!bDone)
break;
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = strlen(oldplace);
if (iLen >= iBufSizeLeft)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
strcpy(newplace, oldplace);
newplace += iLen;
cNewData[sizeof(cNewData)-1] = 0;
LONG lErrNo =
RegSetValueEx(hKey, cValueName, 0, dwType, (LPBYTE)cNewData,
(DWORD) (newplace - cNewData + 1));
if (lErrNo != NO_ERROR)
{
DisplayWarning(lErrNo, "Error saving value in key");
dwReplaceErrorCounter++;
}
else
dwReplaceCounter++;
UpdateStatus();
break;
}
bDone = true;
nextplace[0] = 0;
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = strlen(oldplace);
if (iLen + iToLen >= iBufSizeLeft)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
strcpy(newplace, oldplace);
newplace += iLen;
strcpy(newplace, cTo);
newplace += iToLen;
oldplace += iLen + iFromLen;
}
break;
}
case REG_BINARY:
{
if (memstr(cValueData, cFrom, dwSize) == NULL)
{
bool bDone = false;
char *oldplace = cValueData;
char *newplace = cNewData;
if (wcFrom[0] == 0)
{
if (MultiByteToWideChar(CP_ACP, 0, cFrom, -1, wcFrom,
sizeof(wcFrom)/sizeof(*wcFrom)) == 0)
break;
if (MultiByteToWideChar(CP_ACP, 0, cTo, -1, wcTo,
sizeof(wcTo)/sizeof(*wcTo)) == 0)
break;
}
for (;;)
{
char *nextplace =
(char*)memwcs((LPWSTR)oldplace, wcFrom,
(dwSize - (oldplace-cValueData)) >> 1);
if (nextplace == NULL)
{
// Nothing done? Just break.
if (!bDone)
break;
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = dwSize - (oldplace-cValueData);
if (iLen > iBufSizeLeft)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
memcpy(newplace, oldplace, iLen);
newplace += iLen;
LONG lErrNo =
RegSetValueEx(hKey, cValueName, 0, dwType,
(LPBYTE) cNewData,
(DWORD) (newplace - cNewData));
if (lErrNo != NO_ERROR)
{
DisplayWarning(lErrNo, "Error saving value in key");
dwReplaceErrorCounter++;
}
else
dwReplaceCounter++;
UpdateStatus();
break;
}
bDone = true;
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = nextplace - oldplace;
if (iLen + iToLen > iBufSizeLeft)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
memcpy(newplace, oldplace, iLen);
newplace += iLen;
memcpy(newplace, wcTo, (iToLen << 1));
newplace += (iToLen << 1);
oldplace += iLen + (iFromLen << 1);
}
break;
}
bool bDone = false;
char *oldplace = cValueData;
char *newplace = cNewData;
for (;;)
{
char *nextplace = memstr(oldplace, cFrom,
dwSize - (oldplace-cValueData));
if (nextplace == NULL)
{
// Nothing done? Just break.
if (!bDone)
break;
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = dwSize - (oldplace-cValueData);
if (iLen > iBufSizeLeft)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
memcpy(newplace, oldplace, iLen);
newplace += iLen;
LONG lErrNo =
RegSetValueEx(hKey, cValueName, 0, dwType, (LPBYTE) cNewData,
(DWORD) (newplace - cNewData));
if (lErrNo != NO_ERROR)
{
DisplayWarning(lErrNo, "Error saving value in key");
dwReplaceErrorCounter++;
}
else
dwReplaceCounter++;
UpdateStatus();
break;
}
bDone = true;
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = nextplace - oldplace;
if (iLen + iToLen > iBufSizeLeft)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
memcpy(newplace, oldplace, iLen);
newplace += iLen;
memcpy(newplace, cTo, iToLen);
newplace += iToLen;
oldplace += iLen + iFromLen;
}
break;
}
case REG_MULTI_SZ:
{
bool bDone = false;
char *oldplace = cValueData;
char *newplace = cNewData;
for (;;)
{
char *nextplace = strstr(oldplace, cFrom);
if (nextplace == NULL)
{
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = strlen(oldplace);
if (iLen >= iBufSizeLeft - 1)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
strcpy(newplace, oldplace);
oldplace += iLen + 1;
newplace += iLen + 1;
if (oldplace[0] == 0)
{
if (!bDone)
break;
cNewData[sizeof(cNewData)-2] = 0;
cNewData[sizeof(cNewData)-1] = 0;
LONG lErrNo =
RegSetValueEx(hKey, cValueName, 0, dwType,
(LPBYTE) cNewData,
(DWORD) (newplace - cNewData + 1));
if (lErrNo != NO_ERROR)
{
DisplayWarning(lErrNo,
"Error saving value in key");
dwReplaceErrorCounter++;
}
else
dwReplaceCounter++;
UpdateStatus();
break;
}
}
else
{
bDone = true;
nextplace[0] = 0;
size_t iBufSizeLeft = sizeof(cNewData)-(newplace-cNewData);
size_t iLen = strlen(oldplace);
if (iLen + iToLen >= iBufSizeLeft - 1)
{
_snprintf(cValueData, sizeof cValueData,
"Data too big after replacements: '%s\\%s'",
cKeyPath, cValueName);
cValueData[sizeof(cValueData)-1] = 0;
MessageBox(hwndProgressDialog, cValueData, "Error",
MB_ICONEXCLAMATION);
break;
}
strcpy(newplace, oldplace);
newplace += iLen;
strcpy(newplace, cTo);
newplace += iToLen;
oldplace += iLen + iFromLen;
}
}
break;
}
}
static int q_dropcheck( struct client_t *c, const char *pdata, char *new_q, int new_q_size, char *via_start,
int new_q_len, char q_proto, char q_type, char *q_start,
char **q_replace, char *path_end )
{
char *qcallv[MAX_Q_CALLS+1];
int qcallc;
char *p;
int serverid_len, username_len;
int login_in_path = 0;
int i, j, l;
/*
* if ,qAZ, is the q construct:
* {
* Dump to the packet to the reject log
* Quit processing the packet
* }
*/
if (q_proto == 'A' && q_type == 'Z') {
/* TODO: The reject log should really log the offending packet */
hlog(LOG_DEBUG, "q: dropping for unknown Q construct %c%c", q_proto, q_type);
return QDROP_QAZ; /* drop the packet */
}
/*
* Produce an array of pointers pointing to each callsign in the path
* after the q construct
*/
qcallc = 0;
if (q_start) {
p = q_start + 4;
while (qcallc < MAX_Q_CALLS && p < path_end) {
while (p < path_end && *p == ',')
p++;
if (p == path_end)
break;
qcallv[qcallc++] = p;
while (p < path_end && *p != ',')
p++;
}
qcallv[qcallc] = p+1;
}
/*
* If ,SERVERLOGIN is found after the q construct:
* {
* Dump to the loop log with the sender's IP address for identification
* Quit processing the packet
* }
*
* (note: if serverlogin is 'XYZ-1', it must not match XYZ-12, so we need to
* match against ,SERVERLOGIN, or ,SERVERLOGIN:)
*/
if (q_start) {
serverid_len = strlen(serverid);
p = memstr(serverid, q_start+4, path_end);
if (p && *(p-1) == ',' && ( *(p+serverid_len) == ',' || p+serverid_len == path_end || *(p+serverid_len) == ':' )) {
/* TODO: The reject log should really log the offending packet */
hlog(LOG_DEBUG, "q: dropping due to my callsign appearing in path");
return QDROP_QPATH_MYCALL; /* drop the packet */
}
}
/*
* 1)
* If a callsign-SSID is found twice in the q construct:
* {
* Dump to the loop log with the sender's IP address for identification
* Quit processing the packet
* }
*
* 2)
* If a verified login other than this login is found in the q construct
* and that login is not allowed to have multiple verified connects (the
* IPADDR of an outbound connection is considered a verified login):
* {
* Dump to the loop log with the sender's IP address for identification
* Quit processing the packet
* }
*
* 3)
* If the packet is from an inbound port and the login is found after the q construct but is not the LAST VIACALL:
* {
* Dump to the loop log with the sender's IP address for identification
* Quit processing the packet
* }
*
*/
username_len = strlen(c->username);
for (i = 0; i < qcallc; i++) {
l = qcallv[i+1] - qcallv[i] - 1;
/* 1) */
for (j = i + 1; j < qcallc; j++) {
/* this match is case sensitive in javaprssrvr, so that's what we'll do */
if (l == qcallv[j+1] - qcallv[j] - 1 && strncmp(qcallv[i], qcallv[j], l) == 0) {
/* TODO: The reject log should really log the offending packet */
hlog(LOG_DEBUG, "q: dropping due to callsign-SSID '%.*s' found twice after Q construct", l, qcallv[i]);
return QDROP_QPATH_CALL_TWICE;
}
}
if (l == username_len && strncasecmp(qcallv[i], c->username, username_len) == 0) {
/* ok, login is client's login, handle step 3) */
login_in_path = 1;
if (c->state == CSTATE_CONNECTED &&
(c->flags & CLFLAGS_INPORT) &&
(i != qcallc - 1)) {
/* 3) hits: from an inbound connection, client login found in path,
* but is not the last viacall
* TODO: should dump...
*/
/* TODO: The reject log should really log the offending packet */
hlog(LOG_DEBUG, "q: dropping due to login callsign %s not being the last viacall after Q construct", c->username);
return QDROP_PATH_LOGIN_NOT_LAST;
}
} else if (clientlist_check_if_validated_client(qcallv[i], l) != -1) {
/* 2) hits: TODO: should dump to a loop log */
/* TODO: The reject log should really log the offending packet */
hlog(LOG_DEBUG, "q: dropping due to callsign '%.*s' after Q construct being logged in on another socket, arrived from %s", l, qcallv[i], c->username);
return QDROP_PATH_CALL_IS_LOCAL_CLIENT;
} else if (check_invalid_q_callsign(qcallv[i], l)) {
hlog(LOG_DEBUG, "q: dropping due to callsign '%.*s' after Q construct being invalid as an APRS-IS server name, arrived from %s", l, qcallv[i], c->username);
return QDROP_PATH_CALL_IS_INVALID;
}
if (q_type == 'U' && memcmp(qcallv[i], pdata, l) == 0 && pdata[l] == '>') {
hlog(LOG_DEBUG, "q: dropping due to callsign '%.*s' after qAU also being srccall", l, qcallv[i]);
return QDROP_QAU_PATH_CALL_IS_SRCCALL;
}
}
/*
* If trace is on, the q construct is qAI, or the FROMCALL is on the server's trace list:
* {
* If the packet is from a verified port where the login is not found after the q construct:
* Append ,login
* else if the packet is from an outbound connection
* Append ,IPADDR
*
* Append ,SERVERLOGIN
* }
*/
if (q_proto == 'A' && q_type == 'I') {
/* we replace the existing Q construct with a regenerated one */
*q_replace = q_start+1;
/* copy over existing qAI trace */
new_q_len = path_end - q_start - 1;
//hlog(LOG_DEBUG, "qAI replacing, new_q_len %d", new_q_len);
if (new_q_len > new_q_size) {
/* ouch, memcpy would run over the buffer */
/* TODO: The reject log should really log the offending packet */
hlog(LOG_DEBUG, "q: dropping due to buffer being too tight");
return QDROP_NEWQ_BUFFER_SMALL;
}
memcpy(new_q, q_start+1, new_q_len);
//hlog(LOG_DEBUG, "qAI first memcpy done, new_q_len %d, q_replace %d", new_q_len, *q_replace);
/* If the packet is from a verified port where the login is not found after the q construct */
if (c->validated && !login_in_path) {
/* Append ,login */
new_q_len += snprintf(new_q + new_q_len, new_q_size - new_q_len, ",%s", c->username);
} else if (!(c->flags & CLFLAGS_INPORT) && !login_in_path) {
/* from an outbound connection, append client's hexaddr */
//hlog(LOG_DEBUG, "qAI appending hex address, starting at %d, got %d left in buffer", new_q_len, new_q_size - new_q_len);
new_q_len += snprintf(new_q + new_q_len, new_q_size - new_q_len, ",%s", c->username);
}
//hlog(LOG_DEBUG, "qAI append done, new_q_len %d, new_q_size %d, q_replace %d, going to append %d more", new_q_len, new_q_size, *q_replace, strlen(serverid)+1);
if (new_q_size - new_q_len < 20) {
hlog(LOG_DEBUG, "q dropping due to buffer being too tight when appending my login for qAI");
return QDROP_NEWQ_BUFFER_SMALL;
}
/* Append ,SERVERLOGIN */
new_q_len += snprintf(new_q + new_q_len, new_q_size - new_q_len, ",%s", serverid);
}
return new_q_len;
}
int q_process(struct client_t *c, const char *pdata, char *new_q, int new_q_size, char *via_start,
char **path_end, int pathlen, char **new_q_start, char **q_replace,
int originated_by_client)
{
char *q_start = NULL; /* points to the , before the Q construct */
char *q_nextcall = NULL; /* points to the , after the Q construct */
char *q_nextcall_end = NULL; /* points to the , after the callsign right after the Q construct */
int new_q_len = 0; /* the length of a newly generated Q construct */
char q_proto = 0; /* parsed Q construct protocol character (A for APRS) */
char q_type = 0; /* parsed Q construct type character */
/*
All packets
{
Place into TNC-2 format
If a q construct is last in the path (no call following the qPT)
delete the qPT
}
*/
// fprintf(stderr, "q_process\n");
q_start = memstr(",q", via_start, *path_end);
if (q_start) {
// fprintf(stderr, "\tfound existing q construct\n");
/* there is an existing Q construct, check for a callsign after it */
q_nextcall = memchr(q_start + 1, ',', *path_end - q_start - 1);
if (!q_nextcall) {
// fprintf(stderr, "\tno comma after Q construct, ignoring and overwriting construct\n");
*path_end = q_start;
} else if (q_nextcall - q_start != 4) {
/* does not fit qPT */
// fprintf(stderr, "\tlength of Q construct is not 3 characters\n");
*path_end = q_start;
} else {
/* parse the q construct itself */
q_proto = *(q_start + 2);
q_type = *(q_start + 3);
/* check for callsign following qPT */
q_nextcall++; /* now points to the callsign */
q_nextcall_end = q_nextcall;
while (q_nextcall_end < *path_end && *q_nextcall_end != ',' && *q_nextcall_end != ':')
q_nextcall_end++;
if (q_nextcall == q_nextcall_end) {
// fprintf(stderr, "\tno callsign after Q construct, ignoring and overwriting construct\n");
*path_end = q_start;
q_proto = q_type = 0; /* for the further code: we do not have a Qc */
}
/* it's OK to have more than one callsign after qPT */
}
} else {
/* if the packet's srccall == login, replace digipeater path with
* TCPIP* and insert Q construct
*/
//hlog(LOG_DEBUG, "no q found");
if (originated_by_client && !(c->flags & CLFLAGS_UDPSUBMIT)) {
// where to replace from
*q_replace = via_start;
//hlog(LOG_DEBUG, "inserting TCPIP,qAC... starting at %s", *q_replace);
return snprintf(new_q, new_q_size, ",TCPIP*,qAC,%s", serverid);
}
}
/* If the packet's srccall == login,
* put in a TCPIP* path element and append Q construct
*/
if (c->validated && originated_by_client && c->flags & CLFLAGS_INPORT && q_type != 'I' && !(c->flags & CLFLAGS_UDPSUBMIT)) {
// where to replace from
*q_replace = via_start;
//hlog(LOG_DEBUG, "inserting TCPIP,qAC... starting at %s", *q_replace);
return snprintf(new_q, new_q_size, ",TCPIP*,qAC,%s", serverid);
}
// fprintf(stderr, "\tstep 2...\n");
/* ok, we now either have found an existing Q construct + the next callsign,
* or have eliminated an outright invalid Q construct.
*/
/*
* All packets from an inbound connection that would normally be passed per current validation algorithm:
*/
if (c->state == CSTATE_CONNECTED &&
(c->flags & CLFLAGS_INPORT)) {
/*
* If the packet entered the server from an UDP port:
* {
* if a q construct exists in the packet
* Replace the q construct with ,qAU,SERVERLOGIN
* else
* Append ,qAU,SERVERLOGIN
* Quit q processing
* }
*/
if (c->flags & CLFLAGS_UDPSUBMIT) {
//fprintf(stderr, "\tUDP packet\n");
if (q_proto) {
/* a q construct with a exists in the packet,
* Replace the q construct with ,qAU,SERVERLOGIN
*/
*path_end = q_start;
}
/* Append ,qAU,SERVERLOGIN */
/* Add TCPIP* in the end of the path only if it's not there already */
if (pathlen > 7 && strncmp(*path_end-7, ",TCPIP*", 7) == 0)
return snprintf(new_q, new_q_size, ",qAU,%s", serverid);
else
return snprintf(new_q, new_q_size, ",TCPIP*,qAU,%s", serverid);
}
/*
* If the packet entered the server from an unverified connection AND
* the FROMCALL equals the client login AND the header has been
* successfully converted to TCPXX format (per current validation algorithm):
* {
* (All packets not deemed "OK" from an unverified connection should be dropped.)
* if a q construct with a single call exists in the packet
* Replace the q construct with ,qAX,SERVERLOGIN
* else if more than a single call exists after the q construct
* Invalid header, drop packet as error
* else
* Append ,qAX,SERVERLOGIN
* Quit q processing
* }
*/
if ((!c->validated) && originated_by_client) {
// fprintf(stderr, "\tunvalidated client sends packet originated by itself\n");
// FIXME: how to check if TCPXX conversion is done? Just assume?
if (q_proto && q_nextcall_end == *path_end) {
/* a q construct with a single call exists in the packet,
* Replace the q construct with ,qAX,SERVERLOGIN
*/
*path_end = via_start;
return snprintf(new_q, new_q_size, ",TCPXX*,qAX,%s", serverid);
} else if (q_proto && q_nextcall_end < *path_end) {
/* more than a single call exists after the q construct,
* invalid header, drop the packet as error
*/
return QDROP_NONVAL_MULTI_Q_CALLS;
} else {
/* Append ,qAX,SERVERLOGIN (well, javaprssrvr replaces the via path too) */
*path_end = via_start;
return snprintf(new_q, new_q_size, ",TCPXX*,qAX,%s", serverid);
}
}
if (c->validated && (c->flags & CLFLAGS_CLIENTONLY) && originated_by_client) {
if (q_start)
*path_end = q_start;
else
*path_end = via_start;
return snprintf(new_q, new_q_size, ",qAC,%s", serverid);
}
/* OLD:
* If the packet entered the server from a verified client-only connection
* AND the FROMCALL does not match the login:
* {
* if a q construct exists in the packet
* if the q construct is at the end of the path AND it equals ,qAR,login
* Replace qAR with qAo
* else if the path is terminated with ,login,I
* Replace ,login,I with qAo,login
* else
* Append ,qAO,login
* Skip to "All packets with q constructs"
* }
*
* NOW:
* If the packet entered the server from a verified client-only connection
* AND the FROMCALL does not match the login:
* {
* if a q construct exists in the path
* if the q construct equals ,qAR,callsignssid or ,qAr,callsignssid
* Replace qAR or qAr with qAo
* else if the q construct equals ,qAS,callsignssid
* Replace qAS with qAO
* else if the q construct equals ,qAC,callsignssid and callsignssid is not equal to the servercall or login
* Replace qAC with qAO
* else if the path is terminated with ,callsignssid,I
* Replace ,callsignssid,I with qAo,callsignssid
* else
* Append ,qAO,login
* Skip to "All packets with q constructs"
* }
*/
if (c->validated && (c->flags & CLFLAGS_CLIENTONLY) && !originated_by_client) {
// fprintf(stderr, "\tvalidated client sends sends packet originated by someone else\n");
/* if a q construct exists in the packet */
int add_qAO = 1;
if (q_proto) {
// fprintf(stderr, "\thas q construct\n");
/* if the q construct equals ,qAR,callsignssid or ,qAr,callsignssid */
if (q_proto == 'A' && (q_type == 'R' || q_type == 'r')) {
/* Replace qAR with qAo */
*(q_start + 3) = q_type = 'o';
// fprintf(stderr, "\treplaced qAR with qAo\n");
} else if (q_proto == 'A' && q_type == 'S') {
/* Replace qAS with qAO */
*(q_start + 3) = q_type = 'O';
// fprintf(stderr, "\treplaced qAS with qAO\n");
} else if (q_proto == 'A' && q_type == 'C') {
// FIXME: should also check callsignssid to servercall & login
/* Replace qAC with qAO */
*(q_start + 3) = q_type = 'O';
// fprintf(stderr, "\treplaced qAC with qAO\n");
} else {
// What? Dunno.
}
/* Not going to modify the construct, update pointer to it */
*new_q_start = q_start + 1;
add_qAO = 0;
} else if (pathlen > 2 && *(*path_end -1) == 'I' && *(*path_end -2) == ',') {
hlog(LOG_DEBUG, "path has ,I in the end: %s", pdata);
/* the path is terminated with ,I - lookup previous callsign in path */
char *p = *path_end - 3;
while (p > via_start && *p != ',')
p--;
if (*p == ',') {
const char *prevcall = p+1;
const char *prevcall_end = *path_end - 2;
hlog(LOG_DEBUG, "previous callsign is %.*s\n", (int)(prevcall_end - prevcall), prevcall);
/* if the path is terminated with ,login,I */
// TODO: Should validate that prevcall is a nice callsign
if (1) {
/* Replace ,login,I with qAo,previouscall */
*path_end = p;
new_q_len = snprintf(new_q, new_q_size, ",qAo,%.*s", (int)(prevcall_end - prevcall), prevcall);
q_proto = 'A';
q_type = 'o';
add_qAO = 0;
}
}
}
if (add_qAO) {
/* Append ,qAO,login */
new_q_len = snprintf(new_q, new_q_size, ",qAO,%s", c->username);
q_proto = 'A';
q_type = 'O';
}
/* Skip to "All packets with q constructs" */
return q_dropcheck(c, pdata, new_q, new_q_size, via_start, new_q_len, q_proto, q_type, q_start, q_replace, *path_end);
}
/*
* If a q construct exists in the header:
* Skip to "All packets with q constructs"
*/
if (q_proto) {
// fprintf(stderr, "\texisting q construct\n");
/* Not going to modify the construct, update pointer to it */
*new_q_start = q_start + 1;
/* Skip to "All packets with q constructs" */
return q_dropcheck(c, pdata, new_q, new_q_size, via_start, new_q_len, q_proto, q_type, q_start, q_replace, *path_end);
}
/* At this point we have packets which do not have Q constructs, and
* are either (from validated clients && originated by client)
* or (from unvalidated client && not originated by the client)
*/
/*
* If header is terminated with ,I:
* {
* If the VIACALL preceding the ,I matches the login:
* Change from ,VIACALL,I to ,qAR,VIACALL
* Else
* Change from ,VIACALL,I to ,qAr,VIACALL
* }
* Else If the FROMCALL matches the login:
* {
* Append ,qAC,SERVERLOGIN
* Quit q processing
* }
* Else
* Append ,qAS,login
* Skip to "All packets with q constructs"
*/
if (pathlen > 2 && *(*path_end -1) == 'I' && *(*path_end -2) == ',') {
// fprintf(stderr, "\tpath has ,I in the end\n");
/* the path is terminated with ,I - lookup previous callsign in path */
char *p = *path_end - 3;
while (p > via_start && *p != ',')
p--;
if (*p == ',') {
const char *prevcall = p+1;
const char *prevcall_end = *path_end - 2;
// fprintf(stderr, "\tprevious callsign is %.*s\n", prevcall_end - prevcall, prevcall);
/* if the path is terminated with ,login,I */
if (strlen(c->username) == prevcall_end - prevcall && strncasecmp(c->username, prevcall, prevcall_end - prevcall) == 0) {
/* Replace ,login,I with qAR,login */
*path_end = p;
new_q_len = snprintf(new_q, new_q_size, ",qAR,%s", c->username);
q_proto = 'A';
q_type = 'R';
} else {
/* Replace ,VIACALL,I with qAr,VIACALL */
*path_end = p;
new_q_len = snprintf(new_q, new_q_size, ",qAr,%.*s", (int)(prevcall_end - prevcall), prevcall);
q_proto = 'A';
q_type = 'r';
}
} else {
/* Undefined by the algorithm - there was no VIACALL */
return QDROP_I_NO_VIACALL;
}
} else if (originated_by_client) {
/* FROMCALL matches the login */
/* Add TCPIP* in the end of the path only if it's not there already */
if (pathlen > 7 && strncmp(*path_end-7, ",TCPIP*", 7) == 0)
return snprintf(new_q, new_q_size, ",qAC,%s", serverid);
else
return snprintf(new_q, new_q_size, ",TCPIP*,qAC,%s", serverid);
} else {
/* Append ,qAS,login */
new_q_len = snprintf(new_q, new_q_size, ",qAS,%s", c->username);
q_proto = 'A';
q_type = 'S';
}
/* Skip to "All packets with q constructs" */
return q_dropcheck(c, pdata, new_q, new_q_size, via_start, new_q_len, q_proto, q_type, q_start, q_replace, *path_end);
}
/*
* If packet entered the server from an outbound connection (to
* another server's port 1313, for instance) and no q construct
* exists in the header:
* {
* If header is terminated with ,I:
* Change from ,VIACALL,I to ,qAr,VIACALL
* Else
* Append ,qAS,IPADDR (IPADDR is an 8 character hex
* representation of the IP address of the remote server)
* }
* Untested at the time of implementation (no uplink support yet)
*/
if (!q_proto && (c->flags & CLFLAGS_UPLINKPORT)) {
if (pathlen > 2 && *(*path_end -1) == 'I' && *(*path_end -2) == ',') {
// fprintf(stderr, "\tpath has ,I in the end\n");
/* the path is terminated with ,I - lookup previous callsign in path */
char *p = *path_end - 3;
while (p > via_start && *p != ',')
p--;
if (*p == ',') {
const char *prevcall = p+1;
const char *prevcall_end = *path_end - 2;
// fprintf(stderr, "\tprevious callsign is %.*s\n", prevcall_end - prevcall, prevcall);
/* Replace ,VIACALL,I with qAr,VIACALL */
*path_end = p;
new_q_len = snprintf(new_q, new_q_size, ",qAr,%.*s", (int)(prevcall_end - prevcall), prevcall);
q_proto = 'A';
q_type = 'r';
} else {
/* Undefined by the algorithm - there was no VIACALL */
return QDROP_I_NO_VIACALL;
}
} else {
/* Append ,qAS,IPADDR (IPADDR is an 8 character hex representation
* of the IP address of the remote server)
*/
new_q_len = snprintf(new_q, new_q_size, ",qAS,%s", c->addr_hex);
q_proto = 'A';
q_type = 'S';
}
}
/* If we haven't generated a new Q construct, return a pointer to the existing one */
if (!new_q_len) {
if (q_start == NULL)
hlog(LOG_ERR, "q: Did not find or generate a Q construct (from client %s fd %d): %s", c->username, c->fd, pdata);
*new_q_start = q_start + 1;
}
return q_dropcheck(c, pdata, new_q, new_q_size, via_start, new_q_len, q_proto, q_type, q_start, q_replace, *path_end);
}
static void run_scanner_prog(int fd, struct stat *statbuf, GList *match_list, char **prog)
{
/* fstat(fd, &statbuf) was just done by caller */
off_t cur_pos = lseek(fd, 0, SEEK_CUR);
if (statbuf->st_size <= cur_pos)
{
/* If file was truncated, treat it as a new file.
* (changing inode# causes caller to think that file was closed or renamed)
*/
if (statbuf->st_size < cur_pos)
statbuf->st_ino++;
return; /* we are at EOF, nothing to do */
}
log_info("File grew by %llu bytes, from %llu to %llu",
(long long)(statbuf->st_size - cur_pos),
(long long)(cur_pos),
(long long)(statbuf->st_size));
if (match_list && (statbuf->st_size - cur_pos) < MAX_SCAN_BLOCK)
{
size_t length = statbuf->st_size - cur_pos;
off_t mapofs = cur_pos & ~(off_t)(page_size - 1);
size_t maplen = statbuf->st_size - mapofs;
void *map = mmap(NULL, maplen, PROT_READ, MAP_SHARED, fd, mapofs);
if (map != MAP_FAILED)
{
char *start = (char*)map + (cur_pos & (page_size - 1));
for (GList *l = match_list; l; l = l->next)
{
log_debug("Searching for '%s' in '%.*s'",
(char*)l->data,
length > 20 ? 20 : (int)length, start
);
if (memstr(start, length, (char*)l->data))
{
log_debug("FOUND:'%s'", (char*)l->data);
goto found;
}
}
/* None of the strings are found */
log_debug("NOT FOUND");
munmap(map, maplen);
lseek(fd, statbuf->st_size, SEEK_SET);
return;
found: ;
munmap(map, maplen);
}
}
fflush(NULL); /* paranoia */
pid_t pid = vfork();
if (pid < 0)
perror_msg_and_die("vfork");
if (pid == 0)
{
xmove_fd(fd, STDIN_FILENO);
log_debug("Execing '%s'", prog[0]);
execvp(prog[0], prog);
perror_msg_and_die("Can't execute '%s'", prog[0]);
}
safe_waitpid(pid, NULL, 0);
/* Check fd's position, and move to end if it wasn't advanced.
* This means that child failed to read its stdin.
* This is not supposed to happen, so warn about it.
*/
if (lseek(fd, 0, SEEK_CUR) <= cur_pos)
{
log("Warning, '%s' did not process its input", prog[0]);
lseek(fd, statbuf->st_size, SEEK_SET);
}
}
static int lootr_msg_decode_frag(lootr_msg_ctx_t *ctx, uint8_t *msg,
uint32_t len, lootr_msg_t **res) {
uint8_t *p, *end, *tmp;
uint32_t frag_len;
uint16_t i, n;
int ret;
p = memstr(msg, OTR_FRAG_PREFIX, len, sizeof(OTR_FRAG_PREFIX) - 1);
assert(p == msg);
p += sizeof(OTR_FRAG_PREFIX) - 1;
/* Read i */
end = memchr(p, ',', (uint32_t)(msg + len - p));
if (!end || (uint32_t)(end - p) > 6) {
return -EINVLMSG;
}
i = strtoul((char *)p, (char **)&tmp, 10);
if (tmp != end) {
return -EINVLMSG;
}
p = end + 1;
/* Read n */
end = memchr(p, ',', (uint32_t)(msg + len - p));
if (!end || (uint32_t)(end - p) > 6) {
return -EINVLMSG;
}
n = strtoul((char *)p, (char **)&tmp, 10);
p = end + 1;
/* Read fragment */
end = memchr(p, ',', (uint32_t)(msg + len - p));
if (!end) {
return -EINVLMSG;
}
frag_len = (uint32_t)(end - p);
if (i == 0 || n == 0 || i > n) {
return -EINVLMSG;
}
if (i == 1) {
lootr_msg_ctx_free(ctx);
lootr_msg_ctx_init(ctx);
ctx->i = 0;
ctx->n = n;
ctx->frags = calloc(n, sizeof(lootr_msg_frag_t));
if (!ctx->frags) {
return -ENOMEMORY;
}
}
if (n == ctx->n && i == ctx->i + 1) {
ctx->frags[ctx->i].msg = malloc(frag_len);
if (!ctx->frags[ctx->i].msg) {
return -ENOMEMORY;
}
memcpy(ctx->frags[ctx->i].msg, p, frag_len);
ctx->frags[ctx->i].len = frag_len;
ctx->i = i;
}
else {
lootr_msg_ctx_free(ctx);
lootr_msg_ctx_init(ctx);
}
if (ctx->n > 0 && ctx->i == ctx->n) {
uint8_t *tmp_buf;
uint32_t tmp_len = sizeof(OTR_ENC_PREFIX);
for (i = 0; i < ctx->n; ++i) {
tmp_len += ctx->frags[i].len;
}
tmp_buf = malloc(tmp_len);
if (!tmp_buf) {
return -ENOMEMORY;
}
p = tmp_buf;
memcpy(p, OTR_ENC_PREFIX, sizeof(OTR_ENC_PREFIX) - 1);
p += sizeof(OTR_ENC_PREFIX) - 1;
for (i = 0; i < ctx->n; ++i) {
memcpy(p, ctx->frags[i].msg, ctx->frags[i].len);
p += ctx->frags[i].len;
}
*p = '.';
p += 1;
assert(p == tmp_buf + tmp_len);
ret = lootr_msg_decode(NULL, tmp_buf, tmp_len, res);
free(tmp_buf);
return ret;
}
return MSG_FRAGMENTED;
}
