diff options
Diffstat (limited to 'mbbsd')
| -rw-r--r-- | mbbsd/mbbsd.c | 18 | ||||
| -rw-r--r-- | mbbsd/stuff.c | 21 |
2 files changed, 39 insertions, 0 deletions
diff --git a/mbbsd/mbbsd.c b/mbbsd/mbbsd.c index 589554aa..792f75ca 100644 --- a/mbbsd/mbbsd.c +++ b/mbbsd/mbbsd.c @@ -1483,6 +1483,7 @@ bind_port(int port) static int shell_login(int argc, char *argv[], char *envp[]); static int daemon_login(int argc, char *argv[], char *envp[]); static int check_ban_and_load(int fd); +static int check_badip(char *host); int main(int argc, char *argv[], char *envp[]) @@ -1708,6 +1709,10 @@ daemon_login(int argc, char *argv[], char *envp[]) close(csock); getremotename(&xsin, fromhost, remoteusername); + if( check_badip(fromhost) ){ + sleep(10); + exit(0); + } telnet_init(); return 1; } @@ -1770,6 +1775,19 @@ check_ban_and_load(int fd) return 0; } +static int check_badip(char *host) +{ + const unsigned int banip[] = 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+ unsigned int thisip = 0; + char *ptr, *myhost = strdup(host); + + for( ptr = strtok(myhost, ".") ; ptr != NULL ; ptr = strtok(NULL, ".") ) + thisip = thisip * 256 + atoi(ptr); + free(myhost); + + return uintbsearch(thisip, &banip[1], banip[0]) ? 1 : 0; +} + /* ------- piaip's implementation of TELNET protocol ------- */ enum { diff --git a/mbbsd/stuff.c b/mbbsd/stuff.c index 6a37d816..ee645421 100644 --- a/mbbsd/stuff.c +++ b/mbbsd/stuff.c @@ -981,6 +981,27 @@ inline int *intbsearch(int key, const int *base0, int nmemb) return (NULL); } +inline unsigned int * +uintbsearch(const unsigned int key, const unsigned int *base0, const int nmemb) +{ + /* 改自 /usr/src/lib/libc/stdlib/bsearch.c , + 專給搜 int array 用的, 不透過 compar function 故較快些 */ + const char *base = (const char *)base0; + size_t lim; + unsigned int *p; + + for (lim = nmemb; lim != 0; lim >>= 1) { + p = (unsigned int *)(base + (lim >> 1) * 4); + if( key == *p ) + return p; + if( key > *p ){/* key > p: move right */ + base = (char *)p + 4; + lim--; + } /* else move left */ + } + return (NULL); +} + int qsort_intcompar(const void *a, const void *b) { return *(int *)a - *(int *)b; |