From 3e7e1faef7366413e0b9cfdafc3cca39c3986a40 Mon Sep 17 00:00:00 2001
From: Kevin Jerebica <jerebicakevin@gmail.com>
Date: Mon, 9 Sep 2024 20:55:21 +0200
Subject: [PATCH] feat: add parser for host info

---
 Makefile  |  5 ++++-
 parslib.c | 45 ++++++++++++++++++++++++++++++++++++++++++++-
 parslib.h | 13 ++++++++++++-
 3 files changed, 60 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index da7a49b..1852987 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,17 @@
 CC=gcc
+LD=ld
 CFLAGS=-g3
 CFILES=parslib.c strings.c
 TEST_FILES=test.c
 OUTPUT=parslib.o
 TOUTPUT=test
+LOUTPUT=parslib.final.o
 
 all: $(FILES)
 	$(CC) -c $(CFLAGS) -o parslib.o parslib.c
 	$(CC) -c $(CFLAGS) -o strings.o strings.c
 	$(CC) -c $(CFLAGS) -o streecmp/streecmp.o streecmp/streecmp.c
+	$(LD) -relocatable -o $(LOUTPUT) parslib.o strings.o streecmp/streecmp.o
 
 test: all
 	$(CC) $(CFLAGS) $(TEST_FILES) parslib.o strings.o streecmp/streecmp.o -o $(TOUTPUT)
@@ -20,4 +23,4 @@ run:
 	./$(OUTPUT)
 
 clean: 
-	rm -rf *.o $(TOUTPUT)
+	rm -rf *.o $(TOUTPUT) $(OUTPUT) $(LOUTPUT)
diff --git a/parslib.c b/parslib.c
index dc3cb59..c6dedb1 100644
--- a/parslib.c
+++ b/parslib.c
@@ -10,7 +10,7 @@ extern char *headers;
 static struct nod *method_tree = NULL;
 static struct nod *header_tree = NULL; 
 
-static int stoin(char *str, int len, int *out) {
+int stoin(char *str, int len, int *out) {
     int ret = 0; 
     int place = 1; 
     for (char *chr = str+len-1; chr >= str; chr--) {
@@ -221,6 +221,49 @@ _loop:
     return 0;
 }
 
+int pahostinfo(char *offset, int len, struct hostinfo *info) {
+    int diff = 0; 
+    int usedefault = 0;
+    char *delim = strchr(offset, ':');
+    if (!delim) {
+        delim = offset+len;
+        usedefault = 1;
+    }
+
+    diff = delim-offset;
+    info->hostname = strndup(offset, diff);
+    if (!info->hostname) {
+        goto _err;
+    }
+    info->hostname_len = diff;
+
+    if (usedefault) {
+        diff = strlen(DEFAULT_HTTP);
+        info->service = strndup(DEFAULT_HTTP, diff);
+        if (!info->service) {
+            goto _err_service;
+        }
+        info->service_len = diff;
+    } else {
+        char *service_offset = delim+1;
+        char *end = offset+len;
+        diff = end-service_offset;
+        info->service = strndup(service_offset, diff);
+        if (!info->service) {
+            goto _err_service;
+        }
+        info->service_len = diff;
+    }
+
+    return 0;
+
+_err_service:
+    free(info->hostname);
+
+_err:
+    return -1;
+}
+
 int pareqtitl(char *offset, int len, struct httitlereq *titl) {
     int ret = 0; 
     int diff = 0; 
diff --git a/parslib.h b/parslib.h
index e0556c1..d6d3b87 100644
--- a/parslib.h
+++ b/parslib.h
@@ -9,7 +9,9 @@
                  "User-Agent: curl/8.9.1\r\n"\
                  "Accept: */*\r\n"\
                  "\r\n"\
-                 "{\"key\": \"kefjoiawejfojgorgjbosejrgo\"}"\
+                 "{\"key\": \"kefjoiawejfojgorgjbosejrgo\"}"
+#define DEFAULT_HTTP "80"
+#define DEFAULT_HTTPS "443"
 
 // SRC:https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods
 enum methods {
@@ -143,6 +145,13 @@ struct point {
     int len;
 };
 
+struct hostinfo {
+    char *hostname; 
+    char *service;
+    int hostname_len;
+    int service_len;
+};
+
 struct httitlereq {
     int method;
     struct point uri; 
@@ -165,6 +174,7 @@ struct httpares {
     struct point hentries[header_count];
 };
 
+int stoin(char *str, int len, int *out);
 int initres(void);
 void fretres(void);
 void frepareq(struct httpareq *req);
@@ -172,6 +182,7 @@ void frepares(struct httpares *res);
 int readlin(char **buff, char **buff_lim);
 int parshfield(char *offset, int len, /* out */ struct point *hentries);
 
+int pahostinfo(char *offset, int len, /* out */ struct hostinfo *info);
 int pareqtitl(char *offset, int len, struct httitlereq *titl);
 int parestitl(char *offset, int len, struct httitleres *titl);