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Lines 1-6
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--- netsed.c.orig Tue Jan 9 11:30:40 2001 |
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--- netsed.c.orig Fri Jan 5 18:58:22 2001 |
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+++ netsed.c Tue Jan 9 11:43:41 2001 |
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+++ netsed.c Sun Aug 11 14:32:29 2002 |
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@@ -134,8 +134,10 @@ |
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@@ -2,6 +2,7 @@ |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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+#include <sys/wait.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <fcntl.h> |
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@@ -45,11 +46,11 @@ |
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ERR("This will replace all occurences of pat1 with pat2 in matching packets.\n"); |
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ERR("Additional parameter (count) can be used to expire rule after 'count'\n"); |
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ERR("succesful substitutions. Eight-bit characters, including NULL and '/', can\n"); |
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- ERR("be passed using HTTP-alike hex escape sequences (eg. %%0a%%0d). Single '%%'\n"); |
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- ERR("can be reached by using '%%%%'. Examples:\n\n"); |
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- ERR(" 's/anrew/mike/1' - replace 'andrew' with 'mike' (once)\n"); |
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- ERR(" 's/anrew/mike' - replace all occurences of 'andrew' with 'mike'\n"); |
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- ERR(" 's/anrew/mike%%00' - replace 'andrew' with 'mike\\x00' (to keep orig. size)\n"); |
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+ ERR("be passed using HTTP-alike hex escape sequences (eg. CRLF -> %%0a%%0d).\n"); |
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+ ERR("Single '%%' can be reached by using '%%%%'. Examples:\n\n"); |
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+ ERR(" 's/andrew/mike/1' - replace 'andrew' with 'mike' (once)\n"); |
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+ ERR(" 's/andrew/mike' - replace all occurences of 'andrew' with 'mike'\n"); |
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+ ERR(" 's/andrew/mike%%00' - replace 'andrew' with 'mike\\x00' (to keep orig. size)\n"); |
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ERR(" 's/%%%%/%%2f/20' - replace '%%' with '/' in first 20 packets\n\n"); |
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ERR("Rules are not working on cross-packet boundaries and are evaluated from\n"); |
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ERR("first to last not expired rule.\n"); |
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@@ -134,8 +135,10 @@ |
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void bind_and_listen(int tcp,int port) { |
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void bind_and_listen(int tcp,int port) { |
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Lines 11-17
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fcntl(lsock,F_SETFL,O_NONBLOCK); |
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fcntl(lsock,F_SETFL,O_NONBLOCK); |
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laddr.sin_family = PF_INET; |
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laddr.sin_family = PF_INET; |
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laddr.sin_port = htons (port); |
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laddr.sin_port = htons (port); |
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@@ -186,7 +188,6 @@ |
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@@ -186,7 +189,6 @@ |
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rd=read(s1,buf,sizeof(buf)); |
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rd=read(s1,buf,sizeof(buf)); |
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if (rd<0 && errno!=EAGAIN) return 0; // s1 not connected |
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if (rd<0 && errno!=EAGAIN) return 0; // s1 not connected |
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if (rd>0) { |
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if (rd>0) { |
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Lines 19-25
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printf("[+] Caught server -> client packet.\n"); |
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printf("[+] Caught server -> client packet.\n"); |
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rd=sed_the_buffer(rd); |
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rd=sed_the_buffer(rd); |
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if (write(s2,b2,rd)<=0) return 0; // not able to send |
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if (write(s2,b2,rd)<=0) return 0; // not able to send |
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@@ -195,7 +196,6 @@ |
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@@ -195,7 +197,6 @@ |
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rd=read(s2,buf,sizeof(buf)); |
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rd=read(s2,buf,sizeof(buf)); |
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if (rd<0 && errno!=EAGAIN) return 0; // s2 not connected |
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if (rd<0 && errno!=EAGAIN) return 0; // s2 not connected |
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if (rd>0) { |
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if (rd>0) { |
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Lines 27-29
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printf("[+] Caught client -> server packet.\n"); |
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printf("[+] Caught client -> server packet.\n"); |
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rd=sed_the_buffer(rd); |
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rd=sed_the_buffer(rd); |
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if (write(s1,b2,rd)<=0) return 0; // not able to send |
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if (write(s1,b2,rd)<=0) return 0; // not able to send |
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@@ -204,6 +205,14 @@ |
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return 1; |
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} |
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+void sig_chld(int signo) |
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+{ |
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+ pid_t pid; |
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+ int stat; |
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+ while ( (pid = waitpid(-1, &stat, WNOHANG)) > 0) |
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+ printf("child %d terminated\n", pid); |
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+ return; |
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+} |
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int main(int argc,char* argv[]) { |
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int i; |
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@@ -242,7 +251,7 @@ |
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if (fixedhost && fixedport) printf("[+] Using fixed forwarding to %s:%s.\n",argv[3],argv[4]); |
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else printf("[+] Using dynamic (transparent proxy) forwarding.\n"); |
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signal(SIGPIPE,SIG_IGN); |
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- signal(SIGCHLD,SIG_IGN); |
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+ signal(SIGCHLD,sig_chld); |
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// Am I bad coder?;> |
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