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| author | cbdev <cb@cbcdn.com> | 2025-03-28 19:47:54 +0100 |
|---|---|---|
| committer | cbdev <cb@cbcdn.com> | 2025-03-28 19:47:54 +0100 |
| commit | cacbc652d22338d0924ef64bccccb2f2fa3c83dc (patch) | |
| tree | 81e32538e3ecdb5125a5ae72361a32a3ffd92580 | |
| parent | 98d5f5f0997a53ef80d9a3dac6b5feced61d2d22 (diff) | |
| download | preload-slowloris-master.tar.gz preload-slowloris-master.tar.bz2 preload-slowloris-master.zip | |
| -rw-r--r-- | README.md | 9 | ||||
| -rw-r--r-- | slowloris.c | 18 |
2 files changed, 18 insertions, 9 deletions
@@ -17,8 +17,15 @@ LD_PRELOAD=./slowloris.so curl 10.23.25.3 ``` A delay between individual send() calls (in microseconds) can be set by -providing `SLOWLORIS_DELAY` like so: +providing `SLOWLORIS_DELAY`. The default delay is `0`. ```shell SLOWLORIS_DELAY=1000 LD_PRELOAD=./slowloris.so curl 10.23.25.3 ``` + +The number of bytes sent per iteration can be set by supplying `SLOWLORIS_CHUNK`. +The default chunking is `1`. + +```shell +SLOWLORIS_CHUNK=10 LD_PRELOAD=./slowloris.so curl 10.23.25.3 +``` diff --git a/slowloris.c b/slowloris.c index 846afde..2dca208 100644 --- a/slowloris.c +++ b/slowloris.c @@ -8,17 +8,19 @@ static int silent_mode = 0; static unsigned send_delay = 0; +static unsigned send_chunk = 1; -char* xgetenv(const char* name){ +char* xgetenv(const char* name, char* def){ char* rv = getenv(name); - return rv ? rv : ""; + return rv ? rv : def; } -__attribute__ ((constructor)) void slowloris_init(){ - silent_mode = strtoul(xgetenv("SLOWLORIS_SILENT"), NULL, 10); - send_delay = strtoul(xgetenv("SLOWLORIS_DELAY"), NULL, 10); +__attribute__((constructor)) void slowloris_init(){ + silent_mode = strtoul(xgetenv("SLOWLORIS_SILENT", "0"), NULL, 10); + send_delay = strtoul(xgetenv("SLOWLORIS_DELAY", "0"), NULL, 10); + send_chunk = strtoul(xgetenv("SLOWLORIS_CHUNK", "1"), NULL, 10); if(!silent_mode){ - printf("preload-slowloris active\nDelay: %d\n", send_delay); + printf("preload-slowloris active\nDelay: %d\nChunking: %d\n", send_delay, send_chunk); } } @@ -49,8 +51,8 @@ ssize_t send(int sockfd, const void* buf, size_t len, int flags){ ssize_t rv = 0; - for(size_t u = 0; u < len; u++){ - ssize_t sent = real_send(sockfd, buf + u, 1, flags); + for(size_t u = 0; u < len; u += send_chunk){ + ssize_t sent = real_send(sockfd, buf + u, (send_chunk < len - u) ? send_chunk : (len - u), flags); if(sent < 0){ return -1; } |